Heracles, a Greek warrior hero, killed the dragon with a poisoned bow and arrow, allowing the Hesperides to eat the apples. It is a blue giant star with an apparent magnitude of 3.17. A number represents a stars magnitude, whether apparent/visual or absolute. Thuban formed from an interstellar medium of dust and gas. Thuban is not a particularly bright star, but it holds a special place in the hearts of stargazers. The Draco dragon constellation has a large number of exoplanets 97 in total so far! Key Facts & Summary. The speaker cited some absolutely AWESOME facts and hypothesis about the Great Pyramid and it's construction and mathematical facts and also of hypothesis shit those too. It is about 303 light-years away from Earth and is 250 times more luminous than our Sun. position: +65Distance from earth: The average distance is 168 light-yearsArea: 1083 sq. If you use the 1997 parallax value, Thuban' absolute magnitude is -1.21. From January to March the dragon first appears low on the horizon in a northerly direction at about 6pm. . You will have protection from outside evil forces from all directions. In 20,346AD, it will again be the pole star, that year reaching a maximum declination of 884317.3, at right ascension 19h 08m 54.17s. The Draco stars also feature in Chinese astronomy dating back to 750BC. In the case of a star, it's the galactic centre. The New Horizons space probe is the fastest one that we've sent into space at the time of writing. Draco is a constellation that is fascinating for astronomers to study. Imagine an imposing creature, breathing out fire in anger and ready to destroy all around him! Thuban has also been known as Adib, derived from the Arabic Al Dhibah, meaning the hyenas, and as the Dragons Tail, the latter indicating its position in the constellation. Then, you can imagine the mythical dragon, with a twisted snake-like shape, winding his way across the heavens. It has a radius 40 times that of the Sun and is 950 times more luminous. Perihelion and aphelion were first noticed in the 17th century by astronomer Johannes Kepler, who . The constellation Draco lies in the area of the sky known as the Black Tortoise of the North. Thubans companion star has 2.6 solar masses or 260% of our Suns mass. The smaller the number, the brighter the star is. A daily update by email. Observations suggest the dragon star that created the Cats Eye Nebula ejected its mass in pulses, 1500 years apart. It is a disrupted or collided barred spiral galaxy. the Sun, is -14.00000 km/s Today, Polaris occupies the place of honor. It should not be taken as though the star is moving closer or further away from Earth. An object with a magnitude greater than 6.5 cannot be seen without a telescope or other device. Mach 1 is the speed of sound; Mach 2 is twice the speed. You can decline to give a name which if that is the case, the comment will be attributed to a random star. However, it is not particularly conspicuous, as its brightest star, Eltanin (Gamma Draconis), has an apparent magnitude of 2.24. Aldhibah, also known as Zeta Draconis, lies 330 light-years away. Around 2600 B.C., when the ancient Egyptians were building the earliest pyramids, Thuban appeared as the North Star. The name Thuban comes from the Arabic word thubn, meaning a large snake. As the Earth continues to wobble, Thuban will again return to its former glory North Star in the year 21,000 CE or thereabouts. Thuban lies about halfway between Mizar, the middle star of the Big Dippers handle, and Kochab and Pherkad, the stars that form the outer side of the Little Dippers Bowl. It is sometimes known as the Dragon's Tail and as Adib /dib/. It takes 6.5 days to complete one orbit of its star. Thuban is easy to identify but challenging to see from light-polluted areas. Having gradually drifted away from the pole over the last 4800 years, Thuban is now seen in the night sky at a declination of 64 20 45.6, RA 14h 04m 33.58s. Draco Dwarf Galaxy is part of the Local Group and is a satellite galaxy of the Milky Way. 1 We have been calling the star by looking at which we can make out the direction of the North Pole the North Star. Ref: N.A.S.A. The map was generated using Night Vision, a great free application by Brian Simpson. It is a simple translation, the word Draco comes from the Latin word which means Dragon. That makes it a white giant star, being 120 times more luminous than the Sun. The name Thuban (pronunciation: /jubn/) comes from the Arabic word thubn, denoting a large snake. Thuban represents the Right Pivot (,Yu Sh). [5], According to British conspiracy theorist David Icke, Alpha Draconis is the origin of blood-drinking, shape-shifting reptilians who lurk in underground bases on Earth and plot against humanity (with the aid of powerful figures including royalty).[19]. For example, a red star can be large or small. Physics Physics questions and answers An earth-like planet has been found around the star Alpha Draconis (Thuban, 3.85 solar masses, 6.75 solar radii, 300 solar luminosities, distance 303 lightyear from Earth). Draconis (Latinised to Alpha Draconis) is the star's Bayer designation. NGC 5879 lies just below the loop in the tail of the dragon (13). It is a yellow giant and has a companion main-sequence star. The Right Ascension (Longitude) is expressed in time (hh:mm:ss) and is how far the star is along Earth's celestial equator. The discovery of NGC 5879 was in 1788 by William Herschel. In Draco constellation Egyptian mythology, it was prophesied that one of the sons of the Titan Cronus would dethrone him. Whatever the purpose of the tunnels inside the pyramids might be, the Great Pyramid of Giza was aligned to Thuban, not Polaris. Celestron NexStar 130SLT Computerized Telescope, To find the Draco location, it is easiest to first find the Little Dipper, The Little dipper resembles a ladle with the bright star Polaris at the tip of the handle, Now locate a similar shape to the north, which is the Big Dipper, The tail of Draco winds between the two Dippers, arching over the Little Dipper is a semi-circle, Imagine the tail turning upwards at a point to the right, in line with the star Polaris, Now look upwards and find three bright stars forming a small triangle, You can also find Hercules, also known as Heracles, the Kneeling Giant Warrior, Locate Hercules by finding the stars Arcturus in the constellation Botis, and Vega in the constellation Lyra, Hercules stands between these two constellations, directly in front of the Dragons head, Imagine him ready to slay Draco with a poisoned bow and arrow. Having gradually drifted away from the pole over the last 4800 years, Thuban is now seen in the night sky at a declination of 642045.6, RA 14h 04m 33.58s. Kepler-920 c is a Neptune-like exoplanet with a mass of 13.8 Earths. (31). The radial velocity variations of the stars can be measured and the pair have a somewhat eccentric orbit of 51.4 days. It is a double star system comprising a yellow-white giant and an orange star. Draw an imaginary line that connects the stars Pherkad and Mizar. The radius of Thuban is 7.58 times bigger than the Sun. Draco is not a zodiac sign and has no related Draco planet. To the Egyptians, Thuban was where their dead Pharaoh entered the heavenly realm and joined his compatriot gods. There's no register feature and no need to give an email address if you don't need to. Markarian 205 is a quasar that is believed to lie in the vicinity of the galaxy. The two brightest stars in Draco, Eltanin, and Rastaban are the eyes of the dragon and are close to the radiant point of the Draconids. Using the redshift theory, if a bridge does exist, then the distance between the two objects would be much closer (14). While he was guarding the Tree, the warrior Heracles killed him with a poisoned arrow and flung him into the sky, near to the Celestial north pole. In 2020, she was the Education Prize from the American Astronomical Society, the largest organization of professional astronomers in North America. Deep-sky objects may be as far as 80 million light-years away. This is an exciting discovery and could lead to more findings like this in the universe. Thuban, Alpha Draconis ( Dra), is a spectroscopic binary star system located in the constellation Draco. Thuban's colour is blue, Draco contains many interesting deep sky objects such as the lenticular galaxy NGC 5866, the disrupted spiral galaxy Tadpole, the Cats Eye Nebula, the massive galaxy cluster Abell 2218, and the Draco Dwarf Galaxy, one of the faintest satellites of the Milky Way. Thuban distance from Earth is 308.87 light-years away from Earth or 94.70 parsecs. It lies on the body of the dragon, between the Draco star names Thuban and Aldhibain. Astronomers are always searching for exoplanets, but finding one orbiting a Giant dead star is a mystery. 2.08), one of the stars of the Little Dipper, and the fainter Kappa Draconis (mag. For simplicity it's the central star, such as the Sun. In July, August, and September, the constellation is visible directly overhead at about 10pm. [14] It remained within one degree of celestial north for nearly 200 years afterwards, and even 900 years after its closest approach, was just 5 off the pole. [2] This was the only method at the disposal of the sailors during the days when they did not have any compass with them. Alpha Draconis is a double star, with a red dwarf companion. [>>>] ~[] = Alpha Draconis Rastaban = Beta Draconis Eltanin = Gamma Draconis Altais (Nodus II) = Delta Draconis The future of constellations is unfortunately measured in very long time periods. Thank you! The two bright stars, Rastaban and Elatin, are the eyes of the Dragon, glaring directly at the warrior (22). Thuban is visible from Earth without needing visual aids. A planetary nebula forms when Sun-like stars eject their outer layers of gas. Even though it has the designation Alpha, it is only the eighth brightest star in Draco. The Draco constellation is the 8th largest in the sky. These eclipses last for only six hours. . When you use the 2007 distance, Thuban is roughly 19,170,117.513 Astronomical Units from the Earth/Sun give or take a few. Thubans exact age is uncertain. Star system Polaris is a triple star system consisting of the yellow supergiant Polaris Aa and two white (spectral type F) main sequence stars, Polaris Ab and Polaris B. Polaris Aa and Ab are in close orbit with each other and Polaris B is orbiting the pair. This simulates an optical lens, bending light to form an image. On July 6, at aphelion, Earth will be 1.01 AU from the sun, according to astronomer Fred Espenak . When viewing a constellation from Earth, it appears as if all the stars and celestial bodies are on one flat plane. By night and day, it could be observed by them from the bottom of the great central passage built deep into the solid masonry of the Pyramid of Khufu or Cheops of Gizeh. The constellation depicts a mighty dragon, twisted across the skies. Draco features in Greek, Roman, and Arabic dragon mythology. These include the lenticular galaxy NGC 5866, nicknamed the Spindle Galaxy and believed to be the object Charles Messier catalogued as M102, the disrupted spiral galaxy known as the Tadpole Galaxy (Arp 188), the Cats Eye Nebula (NGC 6543), a bright planetary nebula with a visual magnitude of 9.8, the massive galaxy cluster Abell 2218, and the Draco Dwarf Galaxy, one of the faintest satellites of the Milky Way. He helps you discover your hidden strengths. These are equivalent to the Longitude and Latitude on Earth. The Declination (Latitude) is how far north or south the object is compared to the celestial equator and is expressed in degrees. In the email will be a link to unsubscribe to further notifications. There are thousands! That's almost 32 Earths. You will have to plan a stargazing vacation with the family to see the Draco star system. Sign up for our free daily newsletter today! The constellation of Draco never sets, and is visible throughout the year, for observers in northern latitudes. To compare different stars' actual brightness, you would best use Absolute rather than Apparent Magnitude. If you need the star's diameter, you just need to multiply the radius by 2. Thuban has a faint spectroscopically-detected companion in an orbit with a 51.42 day period. The Water Draco constellation meaning represents depth and passion. This is a minor shower that occurs between 3 February and 5 February, with the peak on 4 February. Its discovery was in 2013. the second exoplanet has an orbital period of about 9 years (17). In millions of years, our Sun may also become a dead white dwarf and who knows if the Earth will continue to orbit it? Draco is a large constellation located in the northern celestial hemisphere. The Distance Calculator can find distance between any two cities or locations available in The World Clock. The star is known by the following names :- Thinking about Earth's precession, explain why Thuban might have been an important star to the ancient Egyptians. Thuban, Alpha Draconis ( Dra), is a spectroscopic binary star system located in the constellation Draco. After the reign of Thuban but before that of Polaris, Kochab in the Little Dipper served as a rather poor pole star in 1100 B.C. Chi Draconi is a star system that lies relatively close to Earth at only 26.3 light-years. The NGC 5866 group is thought to have been first seen by Pierre Mchain in March 1781, or by Charles Messier shortly after that time. The WGSN's first bulletin of July 2016[9] included a table of the first two batches of names approved by the WGSN; which included Thuban for this star. Thuban is located in the constellation of Draco, the eighth largest constellation in the sky and the fourth largest northern constellation, occupying an area of 1,083 square degrees. The star is not alone, but carries along a small, cooler dwarf (hydrogen-fusing) companion at a distance of at least 450 astronomical units and that takes at least 4000 years to make an orbital circuit. Small stars are more energy efficient than larger stars and live longer. The Dragon Devil also features in the Bible Revelation 12:7-9: And the great dragon was cast out, That Old Serpent, called The Devil, and Satan, which deceiveth the whole world: he was cast out into the earth (26). Absolute Magnitude is the star's apparent magnitude from 10 parsecs or 32.6 light years. He is Ladon, the Dragon who guarded the Golden Apple Tree in the Garden of the Hesperides. Rastaban, also known as Beta Draconis, the third brightest star in drago the dragon constellation. 0.17 3.6452), Grumium (Xi Dra, mag. HD 113337 is a yellow-white main-sequence star. The yellow-white color represents the combined light of many stars. In the dragon story, Ladon belonged to Hera, who put him into her Garden to guard her Golden Apple Tree. And it's possible that in its day, Thuban was even more accurate than Polaris is today; ancient texts . Thuban lies in the constellation Draco. Giausar (Lambda Draconis) is a giant star located in the constellation of Draco, The Dragon . The distance will be within 28 light-years and it will then be the brightest star in the sky (32). It takes 32.6 days to complete one orbit of its star. It is bright enough to be seen by the naked eye. Apparent Magnitude is also known as Visual Magnitude. The combined magnitude of the system is 3.57. I've heard that Draconis was the North Star when the pyramids were being designed and built; and that the three pyramids are made up (size and position) and placed with regard to how that the constellation Draco is. Image: Wikimedia Commons/Tfr000 (CC BY-SA 3.0). Read on to learn all about Draco stars. The results, published June 8 in the journal . Beta Draconis. He lies near Botes, Hercules, Lyra, Cygnus, Ursa Minor, and Ursa Major. Eltanin Location The location of the Eltanin in the night sky is determined by the right ascension (R.A.) and declination (Dec.). The larger the mass, the larger the gravity. In 2019, a survey with the Transiting Exoplanet Survey Satellite (TESS) revealed that the system was an eclipsing binary star. Draco can be found in the sky in a twisted shape between the two bears, Ursa Major and Ursa Minor. It lies about 101.2 light-years away from Earth. History of Polaris. In an era marked most dramatically by the building of the pyramids, there was a different North Star: Thuban. Thuban is a white giant star of spectral class A0III, indicating similarities to Vega in temperature and spectrum, but more luminous and massive. This is a great time to take the kids out for some amazing stargazing. She has won a galaxy of awards from the broadcasting and science communities, including having an asteroid named 3505 Byrd in her honor. It will also display local time in each of the locations. Depending on your budget, plan to spend from $250 to $900 on a telescope that will give a lifetime of viewing. The gravity has a relationship to its mass and radius. Although its not a super bright star, it is bright enough to see with relative ease on a dark night. The radiant of the shower is the point from where it originates. is the number of times that the star is from the Earth compared to the Sun. Assuming low mass, the companion orbits at an averaged distance of 0.41 Astronomical Units, just over Mercury's distance from the Sun. It has an apparent magnitude of 10.7 and is about 50 million light-years distant. It has 2 exoplanets orbiting around it. Draco is a powerful and imposing creature of great strength and immense magical powers. Beta Draconis is a binary star with a dwarf star companion. Will he be your foe or your friend? Exoplanets are planets that revolve around stars, other than our star, the Sun. Ian is an astronomy enthusiast, passionate writer, and editor-in-chief of PlanetGuide. The constellations we see today will be different than they were 50,000 years ago or 50,000 years from now. . The name comes from the Arabic At-Tinnin, which means the great serpent. Read on to learn more about Draco the dragon story and the Draco constellation. This creates a spectacular show, often known as shooting stars. There is no Draco zodiac sign, as Draco is not one of the 12 zodiac symbols. The scope comes with 2 eyepieces, a 25mm, and a 9mm. Due to the effects of precession, it will once again be the pole star in the future. Thuban has an average surface temperature of around 10,100 K. The secondary star has around 2.6 solar masses, and it is around 40 times more luminous than our Sun. In case you're wondering, Thuban is not in our. The name Thuban was approved by the International Astronomical Unions (IAU) Working Group on Star Names (WGSN) on June 30, 2016. According to olesewers on earth , distance of sun = 1=150 million km Time taken by particle to reach the earth. It associates with the Dragon Ladon, who was tasked with guarding the Golden Apple Tree in the Garden of the Hesperides. The name is of Arabic origin and it denotes a giant snake. In Roman legend, Draco was one of the Gigantes, a race of great strength who battled the Gods of Olympus for ten years. If you want to go by car, the driving distance between Tabanan and Ubud is 24.44 km. "Being an EarthSky editor is like hosting a big global party for cool nature-lovers," she says. The Chinese asterism called the Right Wall of Purple Forbidden Enclosure is formed by Thuban with Kappa Draconis, Giausar (Lambda Draconis), 24 Ursae Majoris, Alpha Camelopardalis, 43 Camelopardalis, and BK Camelopardalis. The ergonomic hand control allows you to remove it from the holder for remote use or leave it cradled for hands-free operation. They last only six hours. Thuban is easy to spot though, from light-polluted areas, this can become a challenge. It has a computerized mount that automatically tracks your celestial object as it moves across the sky. Difference between fly and go by a car is 8 km. 3.29), Chi Draconis (mag. Much further away is the spectacular Cats Eye Nebula, about 3300 light-years. Alpha Draconis, Alf Dra, HD 123299, TYC 4174-1262-1, HIP 68756, HR 5291, 11 Draconis, 11 Dra, BD +65 978, 2MASS J14042335-6422331, IRAS 14030+6436. It has a supermassive black hole with a mass a billion times that of the Sun. The Egyptian Pyramids were designed to have one side facing north, with an entrance passage geometrically aligned so that Thuban would be visible at night. Even though it has the designation Alpha, it is only the eighth brightest star in Draco. The name comes from the Arabic Al Tis, which means the goat. If you live in the Southern Hemisphere, you may ask how to find the Draco constellation? September 30, 2021 Lining Up The pyramid of Khufu, the largest of the pyramids of Giza, was built with the help of Thuban, a star in the coils of Draco, the dragon. From a hypothetical earth revolving around the companion, Rastaban would shine with the light of 3000 full moons. . -1.21 When you look at Thuban, you are looking back in time and seeing how it looked years ago. (30). When the value is negative, the star and the Sun are getting closer to one another; likewise, a positive number means that two stars are moving away. Thank you for your time and efforts, Thuban is a relatively inconspicuous star in the night sky of the Northern Hemisphere, located at around 305 light-years away from the Sun. Iota Draconis is a yellow-white double that lies about 101.2 light-years away from Earth. Given good viewing conditions, Thuban is relatively easy to spot in the night sky, due to its location in relation to the Big Dipper (aka the Plough) asterism of Ursa Major. Tonight, use the Big Dipper asterism in the constellation Ursa Major the Great Bear to find the sky's northern pole star . Though it bears the designation Alpha, its apparent magnitude is 3.65, which is 3.7 times fainter than the brightest star in the constellation, Gamma Draconis (Eltanin), whose apparent magnitude is 2.24. The Sun is our nearest star, which keeps us warm and gives us light as we complete one orbit in 365.24 days. The star marks the right eye of the Dragon. Thuban (/jubn/),[6] with Bayer designation Alpha Draconis or Draconis, is a binary star system in the northern constellation of Draco. William Herschel discovered the nebula in 1786 (8). Eltanin has a surface temperature of about half of our Suns at 3930 K. In the British Isles, Eltanin is the zenith star, as it lies almost exactly in the zenith when observed from Greenwich. The Tadpole Galaxy lies about 400 million light-years away. Exoplanets excite astronomers as they may offer conditions similar to those in our Solar System, with the possibility of life. Kepler-230 is a G-type star with a radius of 0.82 times that of the Sun. This discovery was in 2002. the planet orbits its mother star every 510 days (16). Draco also stems from the Greek word drakon, from drak, meaning monster with the evil eye. The location of the Thuban in the night sky is determined by the right ascension (R.A.) and declination (Dec.). (15). 3.07), Aldhibah (Zeta Dra, mag. This phenomenon is gravitational lensing. Draco is an area of the sky that does not contain any of the Zodiac constellations. The tree was placed into the Garden by Hera, who received it as a gift from Gaia. You can see it without using a telescope. The star Thuban, in the constellation Draco, lies between the 2 Dippers. After moving nearly 47 off the pole by 10,000 AD, Thuban will gradually move back toward the north celestial pole. A note about the calculations, when I'm talking about years, I'm talking about non-leap years only (365 days). it has 2 exoplanets revolving around it. Most people star-hop to Thuban from the Big and Little Dippers. Thuban is a white giant with an apparent magnitude of 3.64. 3.82). Alpha Draconis is a double star, with a red dwarf companion. The star that ancient Egyptians once used as their North Star is part of a binary pair of stars that periodically eclipse one another, recent observations show. In more recent times, the famous astronomer Ptolemy officially named the Draco constellation. Something went wrong while submitting the form. It turns out that there's more than one star at Polaris. It has bright stars that are easy to spot in dark skies. Astronomers define star brightness in terms of apparent magnitude how bright the star appears from Earth and absolute magnitude how bright the star appears at a standard distance of 32 . That is because he lies close to the Celestial North Pole and circles endlessly around it. Average distance? This occurred from 3942 BCE to 1793 BCE, when some of ancient Egypts pyramids were built (3). You can see the Drago constellation with the naked eye, but using a telescope will make it so much more exciting. If the value is positive, it is north of the celestial equator. The Goddess Minerva killed the dragon and tossed him into the sky. Many compare this motion of Earth which is called precession or sometimes precession of the equinoxes to that which you sometimes see in a spinning top wobbling before it falls. With the Dragon at your side, you will gain confidence and power. In 13,000 years, Vega will become the Pole Star, the star closest to aligning with the North Pole. . Changing the distance from light years to years will tell you roughly how long ago we are looking at the star. In Draco astrology, you can beckon the Dragon when you need protection. He brings peace and allows you to face past experiences with renewed energy (29). Another tip to find the head of the red dragon constellation is to locate Hercules the Kneeling Giant Warrior. Where is the centre of the Solar System. The planet has a mass 318 times the mass of Earth and a radius 11.2 times the radius of Earth. Iota Draconis is an important yellow-white double stars in Draco constellation. Our own Sun is the brightest star and therefore has the lowest of all magnitudes, -26.74. / -1.17, -56.34000 0.17000 milliarcseconds/year, Hello, The star's Galacto-Centric Distance is 7,421 Parsecs or 24,204.582 Light Years. It has ceased hydrogen fusion in its core and started to expand. Polaris Aa has the spectral classification F7Ib. It has an apparent visual magnitude of 10.9 and you can see it with a home telescope. The meteor shower occurs between 6 October and 10 October with a peak on 8 October. 22 degrees to 24 degrees from perpendicular every 41,000 years. The mythology of Draco dates back over 3000 years (1). It was the first giant star discovered to have a planet that orbits it. The twisted body of Draco, winds its way between these two constellations. Thuban was the northern pole star from 3942 to 1793 BCE. Edasich has a radius 12 times that of our Sun and is 55 times more luminous. The radial velocity, the speed at which the Thuban is Stars Thuban ( Draconis) was the northern pole star from 3942 BC, when it moved farther north than Theta Botis, until 1793 BC. This system is an eclipsing binary star system. It has a visual magnitude of 3.29 and you can see it with the naked eye. Thuban is not bright enough to be viewed from badly light-polluted areas. Of all the pole stars, Thuban comes closest to the north celestial pole within 0.2 but it is also fainter than most other pole stars. Image credit: IAU and Sky & Telescope magazine (Roger Sinnott & Rick Fienberg) CC-BY-3.0. Thuban effective temperature is 7,836 Kelvin which is Q1634+706 is a quasar in the Draco constellation. For a long time, only the primary star could be detected in the spectrum. The Chinese know Alpha Draconis as (Z Wi Yu Yun y), or the First Star of Right Wall of Purple Forbidden Enclosure. [citation needed], Thuban is a single-lined spectroscopic binary. The amazing Spindle Galaxy in Draco the constellation is a spiral or lenticular galaxy. Polaris is actually a triple . The Tadpole Galaxy gets its name from the distinctive shape that looks like a swimming tadpole. The exoplanet is WD 1586 b, and is the first recorded instance of this phenomenon. How to choose your telescope magnification? They called Heracles to help them. Alpha Draconis is a single-lined spectroscopic binary star system, which means that only the spectral lines of the primary component are visible. To give some idea Thuban in the dragon constellation lies about 303 light-years away. Aldibain has an apparent magnitude of 2.73 and lies about 92.1 light-years away from the Solar System. Thuban radius has been calculated as being 7.58 times bigger than the Sun. Other than Polaris, Thuban, Edasich, Vega, Deneb, Kochab and Kappa Draconis, the stars that serve as the North Star over the course of Earths 26,000-year precession cycle are Errai (Gamma Cephei), Iota Cephei and Alfirk (Beta Cephei), Alderamin (Alpha Cephei), Fawaris (Delta Cygni), Iota Herculis, and Tau Herculis.
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