HAT-P-29
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Perseus[1] |
| Right ascension | 02h 12m 31.47875s[2] |
| Declination | +51° 46′ 43.5637″[2] |
| Apparent magnitude (V) | 11.83[3] |
| Characteristics | |
| Evolutionary stage | main-sequence[2][4] |
| Spectral type | F8[4] |
| Astrometry | |
| Radial velocity (Rv) | −21.91±0.69[2] km/s |
| Proper motion (μ) | RA: −9.972 mas/yr[2] Dec.: +1.790 mas/yr[2] |
| Parallax (π) | 3.1358±0.0201 mas[2] |
| Distance | 1,040 ± 7 ly (319 ± 2 pc) |
| Absolute magnitude (MV) | +4.11[4] |
| Details[5] | |
| Mass | 1.198+0.065 −0.063 M☉ |
| Radius | 1.229+0.080 −0.073 R☉ |
| Luminosity | 1.89+0.3 −0.25 L☉ |
| Surface gravity (log g) | 4.337+0.045 −0.045 cgs |
| Temperature | 6,112±88 K |
| Metallicity [Fe/H] | 0.128+0.079 −0.080 dex |
| Age | 2.2±1.0[4] Gyr |
| Other designations | |
| Muspelheim, TYC 3293-1539-1, GSC 03293-01539, 2MASS J02123147+5146435[6] | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
HAT-P-29, also known as Muspelheim since 2019 (as part of the IAU's NameExoWorlds project),[7] is a star about 1,040 light-years (320 parsecs) away. It is an F-type main-sequence star. The star's age of 2.2±1.0 billion years is less than half that of the Sun.[4] HAT-P-29 is slightly enriched in heavy elements, having 35% more iron than the Sun.
A very faint 19th-magnitude stellar companion was detected in 2016 at a projected separation of 3.290±0.002″,[8] but Gaia DR2 astrometry suggests that this is an unrelated background object.[9]
Planetary system
[edit | edit source]In 2011 a transiting hot Jupiter planet, HAT-P-29b, was detected on a mildly eccentric orbit.[4] The planet was named "Surt" by Denmark in 2019.[10] The planetary orbit is likely aligned with the equatorial plane of the star, with a misalignment equal to 26±16 degrees.[11]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b (Surt) | 0.767+0.046 −0.045 MJ |
0.0665±0.0012 | 5.723376±0.000021 | 0.073+0.029 −0.028 |
88.06+0.78 −0.59° |
1.055+0.079 −0.072 RJ |
References
[edit | edit source]- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value). Constellation record for this object at VizieR.
- ^ a b c d e f Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value). Gaia DR3 record for this source at VizieR.
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b c d e f Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ IAU100 NameExoWorlds APPROVED NAMES
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Denmark names new planet after Norse fire giant Surt
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
