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{{short description|Program that searches exoplanets around stars}}
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{{No footnotes|date=January 2021}}

'''Okayama Planet Search Program''' is started 2001, spectroscopically searching for planetary systems around stars, report on the detection of 3 new [[extrasolar planets]] (18 Delphini b, Xi Aquilae|Xi Aql b, HD 81688b) around intermediate-mass G and [[Stellar classification#Class_K|K giants]] ([[18 Delphini]], [[Xi Aquilae|Xi Aql]], [[HD 81688]]). Also update the orbital parameters of [[HD 104985 b]], the first planet discovered around [[Stellar classification#Class_G|G giants]] from our survey, by using the data collected during the past six [[year]]s. Since 2001, has been conducting a precise [[Doppler survey]] of about 300 G and K giants using a 1.88m telescope, the HIgh Dispersion Echelle Spectrograph ([[HIDES]]), and an iodine absorption cell ([[I2 cell]] - the internal statistical error can be very small.) at [[Okayama Astrophysical Observatory]] (OAO), for precise radial velocity measurements. Use of numerical calculations suggest that Jupiter-mass planets within about (distance range) {{±|0.5|0.25|0.25}} [[AU]] in fuction of the metallicity and adopted models).
The '''Okayama Planet Search Program''' (OPSP) was started in 2001 with the goal of spectroscopically searching for planetary systems around stars. It reported on the detection of 3 new [[extrasolar planets]]: ([[18 Delphini b]], [[Xi Aquilae b|xi Aql b]], and [[41 Lyncis b]]), around intermediate-mass G and [[K star|K giants]] [[18 Delphini]], [[Xi Aquilae]], and [[HD 81688]]. Also, it updated the orbital parameters of [[HD 104985 b]], the first planet discovered around the [[G star|G giants]] from the survey, by using the data collected during the past six years. Since 2001, it has been conducting a precise [[Doppler effect|Doppler]] [[Astronomical survey|survey]] of about 300 G and K giants using a 1.88m telescope, the High Dispersion Echelle Spectrograph ([[HIDES]]), and an iodine absorption cell [[I2 cell]] at the [[Okayama Astrophysical Observatory]] (OAO).


==Discoveries==
{| class="wikitable sortable"
|+Planets discovered
!Name
!Mass (<var>M</var><sub>J</sub>)
!Discovery date
|-
|[[Arion (planet)| Arion]]
|10.3
|2008
|-
|[[Fortitudo (planet) | Fortitudo]]
|2.8
|2008
|-
|[[Arkas (planet)| Arkas]]
|2.7
|2008
|-
|[[81 Ceti b]]
|5.3
|2008
|-
|[[Spe (planet)|Spe]]
|4.8
|2008
|-
|[[6 Lyncis b]]
|2.01
|2008
|}
*


==Observatory ==
==Observatory ==
⚫
* [[Okayama Astrophysical Observatory]], [[Kurashiki]] in Japan

==References==
{{Reflist}}


*{{cite journal | title=Planetary Companions to Evolved Intermediate-Mass Stars: 14 Andromedae, 81 Ceti, 6 Lyncis, and HD167042 | url=http://pasj.asj.or.jp/v60/n6/600610/600610-frame.html | last1=Sato | first1=Bun'ei | last2=Toyota | first2=Eri | last3=Omiya | first3=Masashi | last4=Izumiura | first4=Hideyuki | last5=Kambe | first5=Eiji | last6=Masuda | first6=Seiji | last7=Takeda | first7=Yoichi | last8=Itoh | first8=Yoichi | last9=Ando | first9=Hiroyasu | last10=Yoshida | first10=Michitoshi | last11=Kokubo | first11=Eiichiro | last12=Ida | first12=Shigeru | display-authors=1 | journal=Publications of the Astronomical Society of Japan | volume=60 | issue=6 | pages=1317–1326 | year=2008 | arxiv=0807.0268 | bibcode=2008PASJ...60.1317S | doi=10.1093/pasj/60.6.1317| s2cid=67841762 }}
⚫
* [[Okayama Astrophysical Observatory]] , [[Kurashiki]] in [[Japan]]
⚫
* {{cite web | url=http://www.oao.nao.ac.jp/en/telescope/ | title=Okayama Astrophysical Observatory Homepage | work=oao.nao.ac.jp | access-date=2008-10-11}}
⚫
* {{cite web | url=http://pasj.asj.or.jp/v60/n3/600314/600314.pdf | title=Planetary Companions around Three Intermediate-Mass G and K Giants: 18 Delphini, Xi Aquilae, and HD81688 | work= www.oao.nao.ac.jp | access-date=2008-10-11}}
⚫
* {{cite web | url=http://www.oao.nao.ac.jp/en/telescope/abouttel188/| title=telescope | work=oao.nao.ac.jp | access-date=2008-10-11}}


{{Exoplanet search projects}}
==Reference==


[[Category:Exoplanet search projects]]
⚫
* {{cite web | url=http://www.oao.nao.ac.jp/en/telescope/ | title=Okayama Astrophysical Observatory Homepage | work=http://www.oao.nao.ac.jp | accessdate=2008-10-11}}
⚫
* {{cite web | url=http://pasj.asj.or.jp/v60/n3/600314/600314.pdf | title=Planetary Companions around Three Intermediate-Mass G and K Giants: 18 Delphini, Xi Aquilae, and HD81688 | work= http://www.oao.nao.ac.jp | accessdate=2008-10-11}}
⚫
* {{cite web | url=http://www.oao.nao.ac.jp/en/telescope/abouttel188/| title=telescope | work=http://www.oao.nao.ac.jp | accessdate=2008-10-11}}


{{uncat}}


{{astronomy-stub}}
{{astrobiology-stub}}

Latest revision as of 10:00, 19 August 2023

The Okayama Planet Search Program (OPSP) was started in 2001 with the goal of spectroscopically searching for planetary systems around stars. It reported on the detection of 3 new extrasolar planets: (18 Delphini b, xi Aql b, and 41 Lyncis b), around intermediate-mass G and K giants 18 Delphini, Xi Aquilae, and HD 81688. Also, it updated the orbital parameters of HD 104985 b, the first planet discovered around the G giants from the survey, by using the data collected during the past six years. Since 2001, it has been conducting a precise Doppler survey of about 300 G and K giants using a 1.88m telescope, the High Dispersion Echelle Spectrograph (HIDES), and an iodine absorption cell I2 cell at the Okayama Astrophysical Observatory (OAO).

Discoveries[edit]

Planets discovered
Name Mass (MJ) Discovery date
Arion 10.3 2008
Fortitudo 2.8 2008
Arkas 2.7 2008
81 Ceti b 5.3 2008
Spe 4.8 2008
6 Lyncis b 2.01 2008

Observatory[edit]

References[edit]

  • Sato, Bun'ei; et al. (2008). "Planetary Companions to Evolved Intermediate-Mass Stars: 14 Andromedae, 81 Ceti, 6 Lyncis, and HD167042". Publications of the Astronomical Society of Japan. 60 (6): 1317–1326. arXiv:0807.0268. Bibcode:2008PASJ...60.1317S. doi:10.1093/pasj/60.6.1317. S2CID 67841762.
  • "Okayama Astrophysical Observatory Homepage". oao.nao.ac.jp. Retrieved 2008-10-11.
  • "Planetary Companions around Three Intermediate-Mass G and K Giants: 18 Delphini, Xi Aquilae, and HD81688" (PDF). www.oao.nao.ac.jp. Retrieved 2008-10-11.
  • "telescope". oao.nao.ac.jp. Retrieved 2008-10-11.


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