HAT-P-65
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Equuleus[1] |
| Right ascension | 21h 03m 37.3131s[2] |
| Declination | +11° 59′ 21.820″[2] |
| Apparent magnitude (V) | 13.16±0.02[3] |
| Characteristics | |
| Evolutionary stage | subgiant[2] |
| Spectral type | G2IV[4] |
| B−V color index | +0.65[3] |
| Astrometry | |
| Radial velocity (Rv) | −47.77±0.10[4] km/s |
| Proper motion (μ) | RA: 4.175(24) mas/yr[2] Dec.: −6.263(16) mas/yr[2] |
| Parallax (π) | 1.3261±0.0353 mas[2] |
| Distance | 2,460 ± 70 ly (750 ± 20 pc) |
| Details[5] | |
| Mass | 1.297+0.056 −0.053 M☉ |
| Radius | 1.666(24) R☉ |
| Luminosity | 2.97(12) L☉ |
| Surface gravity (log g) | 4.1079+0.068 −0.074 cgs |
| Temperature | 5872(40) K |
| Metallicity [Fe/H] | 0.208+0.050 −0.055 dex |
| Rotational velocity (v sin i) | 7.1±0.5[4] km/s |
| Age | 3.9(8) Gyr |
| Other designations | |
| Gaia DR3 1757302881526250496, GSC 01111-00383, 2MASS J21033731+1159218[6] | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
HAT-P-65 is a faint star located in the equatorial constellation Equuleus. With an apparent magnitude of 13.16, it requires a telescope to be seen. The star is located 2,460 light-years (750 pc) away from Earth,[2] but is drifting close with a radial velocity of -48 km/s.
Properties
[edit | edit source]HAT-P-65 has a similar spectral type to that of the Sun. However, it is 21% more massive, and 86% larger than the latter. HAT-P-65 is slightly hotter, with an effective temperature of 5,916 K compared to 5,778 K of the Sun. It also has a higher luminosity and metallicity, with an iron content 26% greater than the Sun.
Planetary system
[edit | edit source]In 2016, an inflated hot Jupiter was discovered orbiting the star in a tight 2 day orbit.[4] No significant transit timing variations or evidence of orbital decay was found in a 2024 study by Kang et. al.[5]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 0.554+0.092 −0.091 MJ |
0.04042+0.00057 −0.00055 |
2.60544751(50) | 0 (assumed) | 88.3(1.0)° | 1.611(24) 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.
- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b c d Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b c 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).
