HAT-P-29
HAT-P-29, also known as Muspelheim since 2019 (as part of the IAU's NameExoWorlds project), is a star about 1,040 light-years (320 parsecs) away. It is a G-type main-sequence star. The star's age of 2.2±1.0 billion years is less than half that of the Sun. HAT-P-29 is slightly enriched in heavy elements, having 35% more iron than the Sun.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Perseus |
| Right ascension | 02h 12m 31.47875s |
| Declination | +51° 46′ 43.5637″ |
| Apparent magnitude (V) | 11.83 |
| Characteristics | |
| Evolutionary stage | main-sequence star |
| Spectral type | G |
| Astrometry | |
| Radial velocity (Rv) | −21.91±0.69 km/s |
| Proper motion (μ) | RA: -9.972 mas/yr Dec.: 1.790 mas/yr |
| Parallax (π) | 3.1358 ± 0.0201 mas |
| Distance | 1,040 ± 7 ly (319 ± 2 pc) |
| Orbit | |
| Primary | HAT-P-29 |
| Companion | HAT-P-29 B |
| Semi-major axis (a) | 3.290±0.002" (1041 AU) |
| Details | |
| 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 | 6112±88 K |
| Metallicity [Fe/H] | 0.128+0.079 −0.080 dex |
| Age | 2.2±1.0 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
A very faint 19th-magnitude stellar companion was detected in 2016 at a projected separation of 3.290±0.002″, but Gaia DR2 astrometry suggests that this is an unrelated background object.
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