XO-3
| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Camelopardalis |
| Right ascension | 04h 21m 52.707s |
| Declination | +57° 49′ 01.87″ |
| Apparent magnitude (V) | 9.80 ± 0.03 |
| Characteristics | |
| Spectral type | F5V |
| Apparent magnitude (B) | 10.25 ± 0.03 |
| Apparent magnitude (V) | 9.80 ± 0.03 |
| Apparent magnitude (J) | 9.013 ± 0.029 |
| Apparent magnitude (H) | 8.845 ± 0.018 |
| Apparent magnitude (K) | 8.791 ± 0.019 |
| Astrometry | |
| Proper motion (μ) |
RA: –3.2 ± 0.6 mas/yr Dec.: 3.2 ± 0.7 mas/yr |
| Distance | 568 ± 59ly (174 ± 18pc) |
| Details | |
| Mass | 1.213 ± 0.066 M☉ |
| Radius | 1.377 ± 0.083 R☉ |
| Luminosity | 2.92+0.59 −0.48 L☉ |
| Surface gravity (log g) | 4.244 ± 0.041 cgs |
| Temperature | 6429 ± 100 K |
| Metallicity [Fe/H] | –0.177 ± 0.08 dex |
| Age | 2.82+0.58 −0.82 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
XO-3 is a star in the constellation Camelopardalis. The star has a magnitude of 10 and is not visible to the naked eye but is visible through a small telescope. A search for a binary companion star using adaptive optics at the MMT Observatory was negative.
In 2007 the gas giant exoplanet XO-3b was discovered by the XO Telescope using the transit method. This object may be classed as brown dwarf because of its high mass.
Coordinates: 
04h 21m 52.7048s, +57° 49′ 01.886″
...
Wikipedia