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Yellow dwarf star in the constellation Lynx From Wikipedia, the free encyclopedia
XO-5 is a yellow dwarf main sequence star located approximately 893 light-years away from Earth in the Lynx constellation. It has a magnitude of about 12 and cannot be seen with the naked eye but is visible through a small telescope.[3][6]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Lynx[1] |
Right ascension | 07h 46m 51.9615s[2] |
Declination | +39° 05′ 40.461″[2] |
Apparent magnitude (V) | 12.13 ± 0.03[3] |
Characteristics | |
Spectral type | G8V[3] |
Apparent magnitude (V) | 12.13 ± 0.03[3] |
Apparent magnitude (R) | 11.844[4] |
Apparent magnitude (J) | 10.774 ± 0.019[5] |
Apparent magnitude (H) | 10.443 ± 0.021[5] |
Apparent magnitude (K) | 10.345 ± 0.018[5] |
Astrometry | |
Proper motion (μ) | RA: −21.509(18) mas/yr[2] Dec.: −23.910(13) mas/yr[2] |
Parallax (π) | 3.6517 ± 0.0173 mas[2] |
Distance | 893 ± 4 ly (274 ± 1 pc) |
Absolute magnitude (MV) | 5.06 ± 0.12[6] |
Details | |
Mass | 0.88 ± 0.03[6] M☉ |
Radius | 1.08 ± 0.04[6] R☉ |
Luminosity | 0.88 ± 0.09[6] L☉ |
Surface gravity (log g) | 4.31 ± 0.03[6] cgs |
Temperature | 5370 ± 70[6] K |
Metallicity [Fe/H] | +0.05 ± 0.06[6] dex |
Age | 14.8 ± 2.0[6] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
XO-5 has a suspected red dwarf companion with a temperature 3500+250
−150 K, on a wide orbit.[8]
The star XO-5 is named Absolutno. The name was selected in the NameExoWorlds campaign by the Czech Republic, during the 100th anniversary of the IAU. Absolutno is a fictional miraculous substance in the sci-fi novel Továrna na absolutno (The Factory for the Absolute).[9][10]
The exoplanet XO-5b was discovered by the XO Telescope using the transit method in 2008. This planet is classified as a hot jupiter.[3] A search for transit timing variations caused by additional planets was negative.[11]
Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b / Makropulos | 1.059 ± 0.028 MJ | 0.0488 ± 0.0006 | 4.1877545 ± 0.0000016 | 0[note 1] | — | — |
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