HAT-P-65
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, but is drifting close with a radial velocity of -48 km/s.
| Observation dataEpoch J2000 Equinox J2000 | |
|---|---|
| Equuleus | |
| 21h 03m 37.3131s | |
| +11° 59′ 21.820″ | |
| 13.16±0.02 | |
| subgiant | |
| G2IV | |
| +0.65 | |
| Radial velocity (Rv) | −47.77±0.10 km/s |
| Proper motion (μ) | RA: 4.175(24) mas/yr Dec.: −6.263(16) mas/yr |
| Parallax (π) | 1.3261±0.0353 mas |
| Distance | 2,460 ± 70 ly (750 ± 20 pc) |
| 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 km/s |
| Age | 3.9(8) Gyr |
| GSC 01111-00383, 2MASS J21033731+1159218, Gaia DR3 1757302881526250496 | |
| 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, but is drifting close with a radial velocity of -48 km/s.
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.
In 2016, an inflated hot Jupiter was discovered orbiting the star in a tight 2 day orbit. No significant transit timing variations or evidence of orbital decay was found in a 2024 study by Kang et. al.
| 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 |