XO-5
| Observation data Epoch 2000 Equinox 2000 |
|
|---|---|
| Constellation | Lynx[1] |
| Right ascension | 07h 46m 51.959s[2] |
| Declination | +39° 05′ 40.46″[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[2] |
| Apparent magnitude (J) | 10.774 ± 0.019[4] |
| Apparent magnitude (H) | 10.443 ± 0.021[4] |
| Apparent magnitude (K) | 10.345 ± 0.018[4] |
| Astrometry | |
| Proper motion (μ) | RA: -32.2 ± 2.8[2] mas/yr Dec.: -22.9 ± 4.9[2] mas/yr |
| Distance | 848 ± 39[5] ly (260 ± 12[5] pc) |
| Absolute magnitude (MV) | 5.06 ± 0.12[5] |
| Details | |
| Mass | 0.88 ± 0.03[5] M☉ |
| Radius | 1.08 ± 0.04[5] R☉ |
| Luminosity | 0.88 ± 0.09[5] L☉ |
| Surface gravity (log g) | 4.31 ± 0.03[5] cgs |
| Temperature | 5370 ± 70[5] K |
| Metallicity [Fe/H] | +0.05 ± 0.06[5] dex |
| Age | 14.8 ± 2.0[5] Gyr |
| Other designations | |
XO-5 is a yellow dwarf main sequence star located approximately 850 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][5]
Planetary system
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.[7]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 1.059 ± 0.028 MJ | 0.0488 ± 0.0006 | 4.1877545 ± 0.0000016 | 0[note 1] | — | — |
See also
Notes
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Coordinates: 
07h 46m 51.959s, +39° 05′ 40.47″
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