13h57m33s, +43° 29′37″| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Canes Venatici[1] |
| Right ascension | 13h57m 33.4669s[2] |
| Declination | +43° 29′ 36.602″[2] |
| Apparent magnitude (V) | 12.84 |
| Characteristics | |
| Spectral type | K5[3] |
| Apparent magnitude (J) | 10.794 ±0.023[4] |
| Apparent magnitude (H) | 10.236 ±0.022[4] |
| Apparent magnitude (K) | 10.108 ±0.016[4] |
| Variable type | planetary transit[3] |
| Astrometry | |
| Radial velocity (Rv) | −40.4589±0.0023[5] km/s |
| Proper motion (μ) | RA: −134.793(8) mas/yr[2] Dec.: −44.229(11) mas/yr[2] |
| Parallax (π) | 7.0448 ± 0.0105 mas[2] |
| Distance | 463.0 ± 0.7 ly (141.9 ± 0.2 pc) |
| Absolute magnitude (MV) | 12.35 ± 0.23 |
| Details[6] | |
| Mass | 0.719±0.016 M☉ |
| Radius | 0.7084±0.0095 R☉ |
| Luminosity | 0.21+0.02 −0.01[3] L☉ |
| Surface gravity (log g) | 4.594±0.013 cgs |
| Temperature | 4710±49 K |
| Metallicity [Fe/H] | −0.24+0.055 −0.062 dex |
| Rotation | 0.5 ± 0.4 kms−1[3] |
| Age | 2.5 ± 2.0[3] Gyr |
| Other designations | |
Komondor, HAT-P-12, Gaia DR3 1499514786891168640, GSC 03033-00706, 2MASS J13573347+4329367, SDSS J135733.42+432936.5[4] | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| Data sources: | |
| Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) | |
HAT-P-12 is a magnitude 13 low-metallicity K dwarf star approximately 463 light years away in the constellation Canes Venatici, which hosts one known exoplanet.[3][2]
The designation HAT-P-12 indicates that this was the 12th star found to have a planet by the HATNet Project.
In August 2022, this planetary system was included among 20 systems to be named by the third NameExoWorlds project.[7] The approved names, proposed by a team from Hungary, were announced in June 2023. HAT-P-12 is named Komondor and its planet is named Puli, after the Hungarian Komondor and Puli dog breeds.[8]
In 2009 an exoplanet, HAT-P-12b, was discovered by the HATNet Project orbiting this star. The planet was discovered using the transit method and confirmed by follow up radial velocity measurements.[3] Transit-timing variations suggest the possible presence of additional non-transiting planets in the system.[9]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b / Puli | 0.211 ± 0.012 MJ | 0.0384 ± 0.0003 | 3.2130598 ± 0.000006 | 0 | — | 0.95+2.85 −0.02 RJ |
| c[9] (unconfirmed) | 0.218 MJ | — | 8.853 | 0.15499 | 73.5° | — |
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