18 Delphini

Artist impression by ESO

18 Delphini

Star details
  • Constellation: the Dolphin
  • Vmag: 5.5
  • Visibility: Faint to the naked eye
  • Number of Planets: 1

Planet details

18 Delphini b

  • Mass (Jupiters): 10.3
  • Mass (Earths): 3273.6
  • Period (days): 993.3
  • Semi Major Axis (AU): 2.6

Proposed names

Star name / planet name Proposed names
18 Delphini Matsu
"Matsu" is Pine-tree and means a happy tree in Japanese.
It is displayed at the time of ceremonies such as New Year holidays or an entrance ceremony, the graduation ceremony.
18 Delphini b Tsuru
"Tsuru" means Crane and it is loved as a happy bird like a pine in Japan.

We will see the planetary system such as the happy painting which a planet "crane" plays around a main star "pine" if this name is adopted.

Star name / planet name Proposed names
18 Delphini Yamamba
18 Delphini has a huge planet. In Japanese old story, a mountain witch
(Yamamba in Japanese) beard very huge baby named Maru.
18 Delphini b Maru
The name of very huge baby.
Star name / planet name Proposed names
18 Delphini KALLISTE
Around 600 B.C. the Greeks, who were colonizing the whole Mediterranean region, landed on an wild island, lacking of about everything, uncultivated. They establish trading posts, develop agriculture. They will call this island Kalliste, meaning in ancient greek « the most beautiful ».
Like the greeks landing on new lands, we must imagine Earthlings arriving near this star in the constellation Delphinus, and be getting closer and closer, being amazed by the beauty of that star.
By remembering the discoveries of the Greeks, who have been scouring the Mediterranean sea, they will also give this star the name Kalliste. This solar system from the constellation Delphinus with its only one planet will be a reference to Mare Nostrum, the birthplace of our civilization.
18 Delphini b CYRNOS
Let's imagine our descendants exploring this solar system, hoping to find after a long journey a host country where life would be possible. They can see a planet while exploring. It arises among the terrible night of the cosmos. This vision reminds them their homeland. In continuity with the name of the star Kalliste, they decide to name this planet Cyrnos, who was Hercule's son, still meaning in ancient greek « all spiky and hilly ». At least this is what those cosmos travellers imagine when observing the outlines and the rugged terrain of this new planet. This, in tribute to great voyagers of the antique world, the Phocians.
Star name / planet name Proposed names
18 Delphini Filippo
Nickname of a dolphin that helped boy who drowned in the Adriatic sea.
18 Delphini b Kirameki
Japanese translation of "twinkle"
Star name / planet name Proposed names
18 Delphini Imoni
The name of local cuisine in Yamagata, Japan.
It is stew with taro and meat enjoyed outdoor and
is now very popular.
18 Delphini b Tamakon
Spherical konjac, which is also very popular food together with
Imoni(the host star) in the same area. The 10 Jovian mass planet
gives just the same impression as "Tamakon".

The constellation Delphinus where the system locates has a
shape which is very similar to a very delicious cherry produced
in Yamagata, Japan, and the constellation boundary also similar
to Yamagata area. The feature of the host star and the planet remind
us Imononi and Tamakon produced in Yamagata. Therefore, they are
suitable for the names of the system.

Star name / planet name Proposed names
18 Delphini Bajja
Abu Bakr Muhammad Ibn-Yhaya ibn-al-Saigh al-Tujibi ibn-Bajja al-Andalyusi al-Saraqusti, born in Saragossa (Spain), and died in Fes (Morocco) in 1139, was one of the most important philosophers of Muslim Spain and a pivotal figure in the transmission of greek science into the islamic world, in the forefront of the 12th century andalusian movement to criticize and replace ptolemaic astronomy based on aristotelian principles. In addition to astronomy, he was also active in other scientific disciplines, such as mathematics, botany, pharmacology, and medicine.
The importance of Ibn-Bajja's astronomy lies in the fact that he seems to have been the first of the Andalusians to
develop a criticism of Ptolemy based on philosophical tenets (the others being Ibn-Tufayl, Ibn-Rushd and Bitruji). They wished to formulate a cosmos according to aristotelian principles (uniform and circular motions centered on the Earth) in which planetary models had no need of eccentrics and epicycles. According to Maimonides in The Guide of the Perplexed, Ibn-Bajja accepted eccentrics but not epicycles.

On the subject of Mercury, he disagrees with the andalusian astronomer Zarqali, who formulated some alternative models to Ptolemy. Besides, in his commentary to Aristotle's Physics, Ibn-Bajja introduces a digression following Philoponus in which he accepts the existence of epicycles. However, a short and incomplete treatise has survived entitled "Kalam fi al‐hayaa" (Discourse on cosmology) that criticizes Ptolemy's method. Here, on the basis of aristotelian logic, Ibn-Bajja tackles the problem of the relationship between what the astronomer can observe and
the underlying reality and argues that the planetary models of the ptolemaic astronomers do not fit the tenets of aristotelian scientific method.
18 Delphini b Tufayl
Abu Bakr Muhammad ibn-Abd al-Malik ibn-Muhammad ibn-Muhammad ibn-Tufayl al-Qaysi, born in Guadix (Spain), died in Marrakesh (Morocco) in 1186. Ibn-Ṭufayl was one of the spanish philosophers who objected to major parts of the ptolemaic system. After entering the service of the Almohads, the North African dynasty that ruled Muslim Spain (al‐Andalus) and North Africa from the middle of the 12th century onward. He then became court physician and counselor to the caliph Abu Yaqub Yusuf. Ibn Ṭufayl seems to have promoted most of the scientific and philosophical enterprises that characterize this period.
He inspired Ibn-Rushd’s systematic commentary of Aristotle and, perhaps, his writing of a medical manual. As for astronomy, Bitruji informs us in his "Kitab al‐Hayaa" that Ibn-Ṭufayl conceived a cosmological system (hayaa) that described planetary motion without having recourse to ptolemaic eccentrics and epicycles, which violated the aristotelian principles of uniform and circular motions centered on the Earth. On the one hand, Ibn-Ṭufayl was aware of the works of the philosopher who paved the way for the "Andalusian revolt" against Ptolemy, Ibn-Bajja; on the other hand, his closest disciple, Ibn-Rushd, devoted much time and effort to studying the problem.

Ibn-Ṭufayl's most important work, the philosophical romance "Risalat Ḥayy ibn Yaqẓan", has several references to astronomy. The study of the heavens plays an essential role in Ḥayy's inquiries. Ibn-Tufayl mentions that the celestial bodies can move either around their own center or around another center suggests that, in spite of what Biṭrūjī says, the author may have accepted eccentrics at some stage, thus sharing the opinion of Ibn-Bajja.
Star name / planet name Proposed names
18 Delphini Musica
The word for music in Latin. In Greek mythology, the constellation was named after a dolphin which liked music.
18 Delphini b Arion
Genius of poetry and music in ancient Greece. In Greek mythology, when he was attacked by pirates, his life was saved by dolphins.

Arion was a genius of poetry and music in ancient Greece.
He won a large sum of prize money at a music competition overseas.
While returning, he was almost murdered by pirates for the prize money.

He intended to die like an artist,
so he stood on the bow of the ship and played a harp and sang a song of death.
The dulcet tone enraptured not only the pirates but also the dolphins which were in the sea.

After he finished singing, he jumped into the sea himself.
The dolphins gathered and picked him up on their backs and brought him back to his hometown.

The Delphinus constellation gets its name from this story, so it is fitting to name its members accordingly.

Star name / planet name Proposed names
18 Delphini Yumeji
This star has been discovered in Okayama Astronomical Observatory.
The name of the famous painter Yumeji Takehisa from Okayama.
18 Delphini b Yoimachi
The name is masterpiece of Yumeji Takehisa.
It's name from poem title Yoimachi-gusa.
Star name / planet name Proposed names
18 Delphini Hataori
“Hataori”means weaving.
The Legend of Tanabata(The Legend of Milky way)is the most famous story in Japan.
This story was told that the Milky way separates Orihime and Hikoboshi
(represented by the stars Vega and Altair respectively),and they are
allowed to meet only once a year.
Hataori is the job of Orihime who is the heroine of The Legend of Milky
way.
18 Delphini b Nagehi
“Nagehi”means shuttle.
Delphinis is called “Hi-Boshi” in Japan
This word means the shuttle star.
Orihime and Hikobosi got married but Hikoboshi has been idle after
marriage. He was drunk everyday. Orihime get angry and throw shuttle
to husband Hikoboshi.
The shuttle star originates from this story.
Star name / planet name Proposed names
18 Delphini Peltier
Leslie Peltier (1900-1980) was recognized by Harlow Shapley as the “the world’s greatest nonprofessional astronomer”. During his 64 years of continuous observing he discovered 12 comets, 4 novae and submitted 132,000 variable star observations to AAVSO, of which he was a member. The Leslie C. Peltier award is given by the Astronomical League to honor an amateur astronomer who has contributed observations of lasting significance.
Leslie received the Ohio Author of the Year award in 1966 for his book, “Starlight Nights”. Comet hunter David Levy, commenting on this book states “Many books explain how to observe the sky; Starlight Nights explains why.” This autobiographical account describes Leslie’s first introduction to the Pleiades by his mother when he was five years old. As a teen, he picked strawberries to earn enough money to purchase his first telescope, a 2 inch refractor. In honor of his outstanding observations and contributions he was loaned a 4 inch scope by AAVSO in 1919 and in 1925, Henry Norris Russell arranged for him to have use of a 6 inch refractor from Princeton University. When the observatory at Miami of Ohio University was being disassembled in 1959, Leslie was gifted a 12” Clark Refractor.
Mr. Peltier was born in Delphos Ohio and lived there his entire life where he had everything he needed; his family, home, gardens and observatory. For this reason, in his honor, we would like to nominate the name Peltier for the exoplanet host star now known as 18 Delphinis.
18 Delphini b Peltier b
Leslie Peltier (1900-1980) was recognized by Harlow Shapley as the “the world’s greatest nonprofessional astronomer”. During his 64 years of continuous observing he discovered 12 comets, 4 novae and submitted 132,000 variable star observations to AAVSO, of which he was a member. The Leslie C. Peltier award is given by the Astronomical League to honor an amateur astronomer who has contributed observations of lasting significance.
Leslie received the Ohio Author of the Year award in 1966 for his book, “Starlight Nights”. Comet hunter David Levy, commenting on this book states “Many books explain how to observe the sky; Starlight Nights explains why.” This autobiographical account describes Leslie’s first introduction to the Pleiades by his mother when he was five years old. As a teen, he picked strawberries to earn enough money to purchase his first telescope, a 2 inch refractor. In honor of his outstanding observations and contributions he was loaned a 4 inch scope by AAVSO in 1919 and in 1925, Henry Norris Russell arranged for him to have use of a 6 inch refractor from Princeton University. When the observatory at Miami of Ohio University was being disassembled in 1959, Leslie was gifted a 12” Clark Refractor.
Mr. Peltier was born in Delphos Ohio and lived there his entire life where he had everything he needed; his family, home, gardens and observatory. For this reason, in his honor, we would like to nominate the name Peltier for the exoplanet host star now known as 18 Delphinis.
Star name / planet name Proposed names
18 Delphini Hoshinoko
"Hoshinoko" in Japanese, means "children of the stars." And, it is also the name of our facilities.
We were born from the elements that are synthesized in the fixed stars. Exactly, we are alter ego of fixed stars and we will show that it is the universe itself.
18 Delphini b Kirakira
"Kirakira" in Japanese, it represents the state of stars are shining. And, it is also the name of our club.
We hope this planet will become a hope of shining stars for the future of children all over the world as well as us.
Star name / planet name Proposed names
18 Delphini seajun
Delphinus constellation looks like a dolphin jumping on the sea.
18 Delphini b ilur
A cute expression of "iruka" that means dolphin in Japanese language.
Star name / planet name Proposed names
18 Delphini Nie er
Delphinus is a beautiful constellation with a shape of dolphin. In ancient Greek mythology, Arion was a famous poet and musician who had been kidnapped by pirates and rescued by a dolphin. In the folktale, the dolphin was moved by Arion’s song and thus saved his life.
Nie Er (1912-1935) is a brilliant Chinese musician who was born in a poverty-stricken family and learned flute, violin and piano by himself. In his very short life, Nie Er composed 37 movements, mainly focusing on the improvement of Chinese laborers’ life condition. At the age of 23, Nie Er drowned in the Pacific Ocean when swimming, which reminds us of Arion to some extent.
18 Delphini b Shengshi
Shengshi is originated from an ancient Chinese folk music collection called Shijing. ‘Sheng’ is a Chinese music instrument while ‘Shi’ means ‘poem’. In Shijing, Shengshi is a joint name of six songs with only tune but no lyrics. Lyrics are distinguished by languages, but tunes are borderless and can be shared around the world. That’s why we choose this name for the planet of 18 Del.
Star name / planet name Proposed names
18 Delphini Arion
Because dolphin helped the Arion in mythology.
This represents a feeling of respect for our dolphin.
18 Delphini b Koto
Because Allion has a harp.
harp is called koto in Japanese.
Star name / planet name Proposed names
18 Delphini Arion
A legend about dolphin's constellation says that a bard, named Arion, was throwing overboard by the sailors of a boat. He was saved by a dolphin.
18 Delphini b Ringsand
This exoplanet has a ring color of sand around it.
Star name / planet name Proposed names
18 Delphini CUPKAMUY
A word meaning “the Sun” in Aynu.
18 Delphini b PIRKA
A word meaning “beautiful” in Aynu.

Aynu (Hokkaido Ainu) is a sole surviving language among Ainu languages spoken by an indigenous people having been in the region covering Hokkaido, South Sakhalin/Karafuto and the Kuril/Chishima Islands.

It is said that all Ainu languages have gone extinct in the 20th century, except for Aynu. Now, even Aynu is facing extinction and is considered" critically endangered" by UNESCO.

We would like to remain the almost extinct language of Aynu on an exoplanet system for ever. Also we hope that various languages in the world are named for celestial bodies.