| Observation data Epoch 2000 Equinox 2000 |
|
|---|---|
| Constellation | Ursa Major |
| Right ascension | 13h 44m 22.585s[1] |
| Declination | +48° 01′ 43.18″[1] |
| Apparent magnitude (V) | 11.86[1] |
| Characteristics | |
| Spectral type | K[2] |
| Apparent magnitude (B) | 12.53 ±0.20[1] |
| Apparent magnitude (V) | 11.86 ±0.15[1] |
| Apparent magnitude (J) | 9.936 ±0.022[1] |
| Apparent magnitude (H) | 9.542 ±0.028[1] |
| Apparent magnitude (K) | 9.448 ±0.025[1] |
| Astrometry | |
| Proper motion (μ) | RA: -23.3 ±2.9[1] mas/yr Dec.: -24.0 ±2.6[1] mas/yr |
| Distance | 457 ±42 ly (140 ±13 pc) |
| Details | |
| Mass | 0.936 (−0.062+0.036) M☉ |
| Radius | 0.824 (−0.035+0.043) R☉ |
| Temperature | 5185 (± 46) K |
| Metallicity | 0.27 (± 0.04) |
| Age | 0.4 × 109 years |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Extrasolar Planets Encyclopaedia |
data |
HAT-P-3, also referred to by the designation GSC 03466-00819 is a star located about 450 light-years away in the constellation Ursa Major. At a magnitude of about 12 it is not visible to the naked eye but is visible in a small to medium-sized amateur telescope. This is a younger metal rich orange dwarf star.[1]
Contents |
This star is home to the extrasolar planet HAT-P-3b discovered by the transit method.[2]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity |
|---|---|---|---|---|
| b | 0.599±0.028 MJ | 0.03894±0.0007 | 2.899703±5.4e-05 | 0 |