HD 100655

HD 100655

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Leo
Right ascension	11^h 35^m 03.753^s[1]
Declination	+20° 26′ 29.57″[1]
Apparent magnitude (V)	+6.45
Characteristics
Spectral type	G9 III
Astrometry
Proper motion (μ)	RA: –59.23 ± 0.51[1]6 mas/yr Dec.: –0.33 ± 0.48[1] mas/yr
Parallax (π)	8.18 ± 0.50[1] mas
Distance	400 ± 20 ly (122 ± 7 pc)
Details
Mass	2.4+0.2 −0.4 M☉
Radius	9.3+1.3 −1.1 R☉
Luminosity	43 ± 5 L☉
Surface gravity (log g)	2.89 ± 0.10 cgs
Temperature	4861 ± 110 K
Metallicity [Fe/H]	0.15 ± 0.12 dex
Other designations
HIP 56508, HR 4459, BD+21 2331
Database references
SIMBAD	data
Exoplanet Archive	data
Extrasolar Planets Encyclopaedia	data

HD 100655 is a G-type clump giant with one confirmed planet,^[2] like Omicron Coronae Borealis b, one of the two least massive planets known around clump giants.^[3]

The HD 100655 planetary system^[2]

Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	>1.7 MJ	0.76+0.02 −0.04	157.57 ± 0.65	0.085 ± 0.054	—	—

References

1. van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.Vizier catalog entry
2. Omiya, Masashi; et al. (2012). "A Planetary Companion to the Intermediate-Mass Giant HD 100655". Publications of the Astronomical Society of Japan 64 (2). 34. arXiv:1111.3746. Bibcode:2012PASJ...64...34O. doi:10.1093/pasj/64.2.34.
3. Sato, Bun'ei; et al. (2012). "Substellar Companions to Seven Evolved Intermediate-Mass Stars". Publications of the Astronomical Society of Japan 64 (6). 135. arXiv:1207.3141. Bibcode:2012PASJ...64..135S. doi:10.1093/pasj/64.6.135.