Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Capricornus [1] |
Right ascension | 20h 49m 49.78530s [2] |
Declination | −24° 25′ 43.5378″ [2] |
Apparent magnitude (V) | 12.43 [3] |
Characteristics | |
Evolutionary stage | main-sequence star |
Spectral type | F [4] |
Astrometry | |
Radial velocity (Rv) | −22.07±0.83 [2] km/s |
Proper motion (μ) |
RA: 10.393
mas/
yr
[2] Dec.: 15.478 mas/ yr [2] |
Parallax (π) | 2.3595 ± 0.0171 mas [2] |
Distance | 1,380 ± 10
ly (424 ± 3 pc) |
Details [5] | |
Mass | 1.210±0.040 M☉ |
Radius | 1.400±0.030 R☉ |
Surface gravity (log g) | 4.22±0.01 [4] cgs |
Temperature | 6351±76 K |
Metallicity [Fe/H] | −0.157±0.070 dex |
Rotational velocity (v sin i) | 9.1±1.3 km/s |
Age | 3.20+0.60 −0.40 Gyr |
Other designations | |
Database references | |
SIMBAD | data |
HATS-3 is an
F-type main-sequence star 1,380
light-years (420
parsecs) away. Its surface temperature is 6351±76
K. HATS-3 is relatively depleted in its concentration of heavy elements, with a
metallicity Fe/H index of −0.157±0.07, but is slightly younger than the
Sun at an age of 3.2+0.6
−0.4 billion years.
[4]
A multiplicity survey in 2016 detected a candidate stellar companion to HATS-3, 3.671±0.016 arc-seconds away. [6]
In 2013, one planet, named HATS-3b, was discovered on a tight, nearly circular orbit. [4] The planetary orbit of HATS-3b is likely aligned with the equatorial plane of the star, at a misalignment angle of 3±25°. [7] The planetary equilibrium temperature is 1643 K. [4]
Companion (in order from star) |
Mass |
Semimajor axis ( AU) |
Orbital period ( days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | 1.10+0.18 −0.19 MJ |
0.04852+0.00053 −0.00054 |
3.5478510(50) | <0.30 | 86.20±0.30 ° | 1.381±0.035 RJ |