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 An exoplanet or extrasolar planet is a planet outside the Solar System. The first confirmed detection of an exoplanet was in 1992 around a pulsar, and the first detection around a main-sequence star was in 1995. A different planet, first detect ...

: (

18 Delphini b 18 Delphini b (abbreviated 18 Del b), formally named Arion , is an extrasolar planet approximately 249 light-years away in the constellation of Delphinus. The 993-day period planet orbits the yellow giant star 18 Delphini. A very massive and dens ...

, xi Aql b, and

41 Lyncis b 41 Lyncis b (abbreviated 41 Lyn b), also designated HD 81688 b and named Arkas , is a candidate exoplanet approximately 276 light-years from Earth in the constellation of Ursa Major. A gas giant with a minimum mass 2.7 times that of Jupiter, it ...

), around intermediate-mass G and K giants

18 Delphini 18 Delphini, also named Musica , is a single star in the constellation of Delphinus of the low northern hemisphere. It has a Sun-like golden hue and is faintly visible to the naked eye with an apparent visual magnitude of 5.506. The star i ...

, 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 The Doppler effect (also Doppler shift) is the change in the frequency of a wave in relation to an observer who is moving relative to the source of the wave. The ''Doppler effect'' is named after the physicist Christian Doppler, who described ...

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 The (NAOJ) is an astronomy, astronomical research organisation comprising several facilities in Japan, as well as an observatory in Hawaii and Chile. It was established in 1988 as an amalgamation of three existing research organizations - the To ...

(OAO).

Discoveries

Observatory

Kurashiki is a city located in Okayama Prefecture, Japan. , the city had an estimated population of 478,651 and a population density of 1300 persons per km2. The total area of the city is . Geography Kurashiki is located in the south-central part of Okay ...

in Japan

References

* * * * {{Exoplanet search projects Exoplanet search projects