| Observation data Epoch 2000 Equinox 2000 |
|
|---|---|
| Constellation | Lynx |
| Right ascension | 07h 21m 33.1657s[1] |
| Declination | +58° 16′ 05.005″[1] |
| Apparent magnitude (V) | 10.78[1] |
| Characteristics | |
| Spectral type | F5V |
| Apparent magnitude (B) | ~11.13[1] |
| Apparent magnitude (V) | ~10.78[1] |
| Apparent magnitude (J) | 9.667 ±0.021[1] |
| Apparent magnitude (H) | 9.476 ±0.022[1] |
| Apparent magnitude (K) | 9.406 ±0.023[1] |
| Astrometry | |
| Proper motion (μ) | RA: -15.30[1] mas/yr Dec.: -4.00[1] mas/yr |
| Distance | 956 ±62 ly (293 ±19 pc) |
| Details | |
| Mass | 1.32 ±0.02 M☉ |
| Radius | 1.55 ±0.05 R☉ |
| Temperature | ~6500[1] K |
| Metallicity | -0.04 ±0.03 |
| Rotation | [1] |
| Age | 2.1 ±0.6 × 109 years |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Extrasolar Planets Encyclopaedia |
data |
XO-4 is a star located approximately 956 light-years away from Earth in the Lynx constellation. It has a magnitude of about 11 and cannot be seen with the naked eye but is visible through a small telescope.[1]
Contents |
One known exoplanet, XO-4b, which is classified as a hot jupiter, orbits XO-4. This exoplanet was discovered in 2008 by the XO Telescope project using the transit method.[2]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity |
|---|---|---|---|---|
| XO-4b | 1.72 ±0.2 MJ | 0.0555 ±0.0011 | 4.12502 ±2e-05 | 0 |