HD 75898

From Wikipedia, the free encyclopedia
Jump to: navigation, search
HD 75898
Observation data
Epoch J2000      Equinox J2000
Constellation Lynx
Right ascension 08h 53m 50.8051s
Declination +33° 03′ 24.522″
Apparent magnitude (V) 8.04
Distance 262.82 ly
(80.58 pc)
Spectral type G0IV
Other designations
BD+33°1776, HIP 43674, SAO 61116
Database references
SIMBAD data

HD 75898 is an 8th magnitude star approximately 263 light years away in the constellation Lynx. It is a yellow subgiant, although it is only 3.8 billion years old. The star is 28% more massive, 60% larger, and 3 times as luminous than our local star. It is a metal-rich star, meaning it has 186% the solar abundance of iron.

Planetary system[edit]

On January 11, 2007, the California and Carnegie Planet Search team found one planet orbiting HD 75898.[1] It wasn’t published until May 27, 2007. The centre of mass of the system is accelerating, indicating there is a third, more distant, component at least the size of Jupiter. If it has 1 to 13 times the mass of Jupiter it is 30-65 au distant with an orbital period of 4.5 to 460 years. If it is a brown dwarf, it has 13 to 83 times the mass of Jupiter and would be 75-170 au distant with an orbital period of 418 to 1900 years.

The HD 75898 planetary system[1]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b >2.51 MJ 1.19 418.2 ± 5.7 0.10 ± 0.05

See also[edit]

References[edit]

  1. ^ a b Robinson, Sarah E.; et al. (2007). "Two Jovian-Mass Planets in Earthlike Orbits". The Astrophysical Journal. 670 (2): 1391–1400. arXiv:0708.0832free to read. Bibcode:2007ApJ...670.1391R. doi:10.1086/522106. 

External links[edit]

  • "HD 75898". The Extrasolar Planets Encyclopaedia. 

Coordinates: Sky map 08h 53m 50.8051s, +33° 03′ 24.522″