Ain (epsilon Tauri)

Artist impression by ESO/L. Calçada/Nick Risinger

Ain (epsilon Tauri)

Star details
  • Constellation: the Bull
  • Vmag: 3.5
  • Visibility: Visible to the naked eye
  • Number of Planets: 1

Planet details

epsilon Tauri b

  • Mass (Jupiters): 7.6
  • Mass (Earths): 2415.5
  • Period (days): 594.9
  • Semi Major Axis (AU): 1.93

Proposed names

Star name / planet name Proposed names
epsilon Tauri b Kizuna
Kizuna means the spiritual connection of each other in Japanese. After the 2011 Great East Japan Earthquake, it is frequently used the words are re-recognition between the family and community people.

It is a planetary system in the open cluster that the Japanease team found. This word,which means "strong psychological bond" in Japanease is I think appropriate to the name of the planet.

Star name / planet name Proposed names
epsilon Tauri b Rabita
Rabita in Arabic . Meaning is bonds ( bond ) .
Deepen everyone more bonds of astronomy club " Copernicus " , a fun star With great feeling that we want to study we thought this name .
" Bonds " is that the ties between people , and help each other mutual support Meaning to you . Primary star and is the word of perfect for planets orbiting around it .
The etymology of " bonds " is the rope tethering the animal , such as " towline " .
Star for the role of the towline to protect Orion from the ferocious bull .
Do not you think it's a nice name ?!
Star name / planet name Proposed names
epsilon Tauri b Fusenkazura(ふうせんかずら)
"ふうせんかずら" is plant.
The seed resembles a design of the Pluto, and it looks like heart-sharped.
We think that there should be a lot of peaceful heart types in the sky
Star name / planet name Proposed names
epsilon Tauri b kawatten
kawagoe astronomy club
Star name / planet name Proposed names
epsilon Tauri b whirlwind
"Ain" means the second eye of cattle in Latin.
Ain b revolve around "the eye".
In the Japanese idiom,"Eye spin" means "in a whirl".
So,we associated it with a whirlwind .
We suggest to name Ain b "whirlwind" .
Star name / planet name Proposed names
epsilon Tauri b Namida
The meaning of "Namida" is a tear in Japanese. And also,we think it has a meaning of beautiful thing which come from the host star-Ain. Ain is a exoplanet discovered by Japanese, which means "eye".
Star name / planet name Proposed names
epsilon Tauri b Nanayon
A nickname of the 74 inches (188cm) telescope at Okayama Astrophysical Observatory (NAOJ) which discovered this exoplanet. "Nana" and "yon" mean 7 and 4 of number in Japanese, respectively.
Star name / planet name Proposed names
epsilon Tauri b Kiyora
Kiyora means beautiful in ancient Japanese.

The host star of this exoplanet is named Ain, which means ‘the bull's eye’ in Arabic. The exoplanet is also affiliated with Taurus, which represents Zeus transformed as a bull in order to carry away Europa. In other words, Tauruas keeps his eyes open for beautiful women. In addition, the exoplanet was discovered by a Japanese group. So, after considering these factors, we would to name the exoplanet Kiyora.

Star name / planet name Proposed names
epsilon Tauri b Gvov
Le nom GVOV est proposé par le Planétarium d'Epinal (88 - Vosges - FRANCE) en collaboration avec Monsieur PISKORSKI, professeur des écoles à la retraite. Ce nom n'est pas si étrange qu'il peut paraître. En fait, il s'agit de la construction de la racine désignant l'aurochs, ancêtre de la race bovine, dans le langage proto indo-européen. Ou encore la vache en Arménien. Ce nom est en l'honneur de tous les peuples parlant une langue d'origine Indo Européenne. La légende raconte que le roi Charlemagne venait chasser Le bovin sauvage dans les Vosges. Un autre clin d'oeil à la race bovine: les frontières de notre département (Vosges) laissent à penser à un dessin de bovin.

The name was proposed by GVOV Planetarium Epinal (88 - Vosges - France) in collaboration with Mr. PISKORSKI, retired school teacher. This name is not so strange as it may seem. In fact, it is the construction of the root designating the aurochs, the ancestor of the breed of cattle in the language of proto-Indo-European. Or cow in Armenian. This name is in honor of all the people speaking an Indo-European origin. Legend has it that Charlemagne came to hunt wild cattle in the Vosges. Another nod to the cattle breed: the borders of our department (Vosges) suggest a bovine drawing.
Star name / planet name Proposed names
epsilon Tauri b Sarumenokimi
Sarumenokimi is the clan name concerned with a rite of an Imperial Court from antiquity. Descendant of Amenouzume.
Sarutahiko and the descendant of Amenouzume who concerned. For Sarutahiko to leave his name behind, it was called.
She participated in a rite as a witch.

This star is a planet in the Hyades,
the Hyades neighborhood is intended for Sarutahiko who is her ancestor
there in Japan.
In addition, the name of this star, which means the cow's eyes,
'Saru', refers to the monkey, ’-me' represents the eye. And therefore
'Sarume' is reminiscent of a monkey eye in Japanese.

Star name / planet name Proposed names
epsilon Tauri b hikaru-genji
He is the main character of "The Tale of Genji", which was written by female writer"Murasaki Shikibu" in Japan of the Heian period,10 century. Like the friendly white male cattle brought the Europa princess back to Europe, he lived in love and passion.

He is the main character of "The Tale of Genji". Like the friendly white male cattle brought the Europa princess back to Europe, he lived in love and passion.

Star name / planet name Proposed names
epsilon Tauri b Kanenone
Hyades Cluster is called “Tsurigane Boshi” in Japan.
“Tsurigane” means “temple bell,” and “Boshi” means “star.”
Just like church bell in the West, temple bell is indispensable to everyday life in the East for a long time.

Houei Nojiri, an eminent scholar in ethnology who was also an amateur astronomer, travelled all over Japan and studied star names which were used among ordinary Japanese people such as farmers and fishermen.
Through the study, Nojiri recognized that many constellations were named after the familier objets which people see or use everyday.

The V-shaped cluster had been associated with the head of Taurus from ancient times in Europe, but Nojiri found that the cluster had been associated with a Buddhist temple bell in some regions in Japan and called “Tsurigane Boshi.”
After Njiri’s reserch, most of the people in the country started to call Hyades Cluster “Tsurigane Boshi.”

In 2007, the researchers at Okayama Observatory of NAOJ discovered a planet of Epsilon Tauri, one of the stars of “Tsurugane Boshi.”

The research institute had been studying the cycle of Epsilon Tauri and its amplitude of vibration since 2003.
The institute discovered that a giant planet is causing the sway of the central star, Epsilon Tauri.

The mass of Epsilon Tauri is three times as heavy as the sun. And, the mass of the planet of Epsilon Tauri is eight times as heavy as Jupiter.
The big planet of Epsilon Tauri has the power to sway the central star itself.

An October night of 2014, a group of people, both young and old, gathered and attended “Fall Observing Session at Kuzuha-no-Ie,” a public observing session at one of the natural science centers of Hadano city in Kanagawa prefecture, Japan.




The members of Tanzawa Astronomy Club set up many telescopes on the ground of the center, and they were ready to help the participants to observe the night sky.

The prominent 4th magnitude orange star was shinning brightly over the heads of the volunteer members of Tanzawa Astronomy Club and the participants of “Fall Observing Session at Kuzuha-no-Ie.”

Among many celestial objects which we are able to name, The members of Tanzawa Astronomy Club and the participants of “Fall Observing Session at kuzuha-no-Ie” selected the planet of Epsilon Tauri to express the respect for Nojiri and Okayama Observatory.

Tanzawa Astronomy Club members and the participants talked about the study of Nojiri and the effort of Okayama Observatory while observing Epsilon Tauri under the beautiful October night sky.

At the end of the session, the club members and the participants sit in the classroom of the center and discussed about the name for the newly discovered planet of Epsilon Tauri.

In December 2014, Tanzawa Astronomy Club finally picked up a name from the numbers of candidate names.
The name was “Kane-no-Ne.”
“Kane” means “bell,” “no” means “of” and “Ne” means “ring.”
Therefore, “Kane-no-Ne” means “Ring of Bell.”

The giant planet sways the central star, rings the bell and reverberates the clear sounds across the vast space.

In behalf of the members of Tanzawa Astronomy Club and the participants of “Fall Observing Session at Kuzuha-no-Ie,” I propose “Kane-no-Ne” for the name of the newly discovered extrasolar planet of Epsilon Tauri.
Star name / planet name Proposed names
epsilon Tauri b Tsubakurame
‘Tsubakurame’ is the archaic name of swallow in Japanese. The reasons why we choose it are very simple.
Swallow is a familiar bird to Japanese people and auspicious bird in East Asia culture for a long time. And swallow is also an important parts of the symbol mark of Tokyo Institute of Technology-our beloved university. The symbol mark has a swallow in the center of a window. It means the students in Tokyo Tech are seeing the world by studying and researching just like swallows fly through the window to the broad sky. So a lot of things associated with Tokyo Tech are named by the Japanese name of swallow ‘Tsubame’, for example, super-computer TSUBAME2.5 and experimental satellite made by Professor Matunaga.
The symbol mark was officially adopted in the year of 100th anniversary of Tokyo Tech. So to show the history of our university, we chose the older word ‘Tsubakurame’ instead of ‘Tsubame’.

The reason we choose the planet, is that it is the advisor of our astronomy club-Professor Bunei Sato has discovered it. We want to say thanks to him by naming the planet.
We believe that naming an exoplanet is a good chance to demonstrate the achievement made by our university to the world, and to attract attention of the public in Japan to frontier of space exploration.

Star name / planet name Proposed names
epsilon Tauri b Harima
"Harima" is the area where astronomical observation is prosperous.
And this area is located around the meridian (135 degrees).
Star name / planet name Proposed names
epsilon Tauri b Amaterasu
Amaterasu is a goddess of the sun in Japanese myth. She was born
from left-eye of god Izanagi, when he was washing up his eyes.
We propose this name because the system is left-eye of Taurus
and found at Japan.
Star name / planet name Proposed names
epsilon Tauri b Tasogare
In Japan, the word Tasogare means "The peak has already passed away, but it won't still die." This red giant star's peak has passed away, it's life is going to it's end. So we thought this Japanese word would fit this star. And also, Tasogare is a time after sunset, where the red color is left in the sky. We also thought that the color fits this star as well. From these 2 meanings, we recommend the word Tasogare to this star.

黄昏は”最盛期が過ぎたが、多少余力を残していて、まだ滅亡には早い”という意味があり、赤色巨星であるこの星はもうすでにエネルギーをほとんど使い切っていて寿命が尽きそうな状態であることがまさしくこの黄昏の意味に合致していると思いました。そして黄昏には”夕暮れ後の赤色が空に残っている時間帯”という意味もあり、この色が赤色巨星の色にも合うと思いました。以上の2点から”黄昏”という名前を推薦します。

Star name / planet name Proposed names
epsilon Tauri b Carnival
We, Akashi Municipal Planetarium Astronomy Club, propose to name an exoplanet of Ain (Ɛ Taurus) "Carnival". This exoplanet is located between Messier 1 (Crab Nebula) and Messier 45 (Pleiades star cluster). Messier 1 and 45 have been very famous and familiar to almost all Japanese since approx 1000 years ago. The supernova explosion of M1 was recorded in diary called "Meigetsuki" written by Sir Teika Fujiwara. It is recorded that the explosion occurred in 1054AD by this "Meigetsuki". And Messier 45 was written in the essay "The Pillow Book" of Sei Shonagon that the most wonderful star was "Subaru". In addition, the exoplanet (Ɛ Taurus b) was discovered in Japan in 2007. Thus we think the origin of the name should come from Japanese. The origin of the name is that "Carnival" is a compound word from "Kani" and "Baru". Messier 1 is called "Kani Nebula" in Japan because "Crab" is "Kani" in Japanese. And Messier 45 is called "Subaru" in Japanese. However, "Kanibaru" is difficult to pronounce. So we changed the name from "Kanibaru" to "Carnival".
Star name / planet name Proposed names
epsilon Tauri b magnatalpa
The proposed name "magnatalpa" means "a big mole(a mark on the skin)" in Latin. Epsilon Tauri locates in the Hyades, and this star cluster corresponds to the face of the Taurus. Thus, we imagine this huge but not shining planet as a mole on the bull's face.

The meaning of a Latin word "talpa" is "mole" in English. This has another meaning: an animal lives under the ground. We consider the both meaning is suitable because they certainly exists under the ground but we cannot see them just like a exoplanets!!

Star name / planet name Proposed names
epsilon Tauri b Fabris
Far Brilliant Star
Star name / planet name Proposed names
epsilon Tauri b Daruma
The Daruma doll is a traditional doll of Japan. It is one of the most popular talismans of good luck in Japan.
Star name / planet name Proposed names
epsilon Tauri b kipa
Kipa कीपा is from Newari language and it is a very rich language

kipa is light