HD 112410
Star in the constellation Musca
From Wikipedia, the free encyclopedia
HD 112410 is a star in the southern constellation of Musca. It has a yellow hue and is too dim to be readily visible to the average sight, having an apparent visual magnitude of 6.86.[1] The distance to this star is 513 light years based on parallax, and it is drifting further away from the Sun with a radial velocity of 73 km/s.[2] It has an absolute magnitude of 1.22.[1]
| Observation data Epoch J2000 Equinox ICRS | |
|---|---|
| Constellation | Musca[1] |
| Right ascension | 12h 57m 31.95991s[2] |
| Declination | −65° 38′ 47.2594″[2] |
| Apparent magnitude (V) | 6.86[1] |
| Characteristics | |
| Evolutionary stage | red giant branch[3] |
| Spectral type | G8III[4] |
| B−V color index | 1.018±0.008[1] |
| Astrometry | |
| Radial velocity (Rv) | 72.82±0.15[2] km/s |
| Proper motion (μ) | RA: −65.486±0.043[2] mas/yr Dec.: +31.269±0.038[2] mas/yr |
| Parallax (π) | 6.3628±0.0284 mas[2] |
| Distance | 513 ± 2 ly (157.2 ± 0.7 pc) |
| Absolute magnitude (MV) | 1.22[1] |
| Details | |
| Mass | 1.21±0.25[5] 1.54±0.05[6] 2.32±0.23[7] M☉ |
| Radius | 9.56±0.15[8] R☉ |
| Luminosity | 46.0±0.8[8] L☉ |
| Surface gravity (log g) | 2.56±0.10[8] cgs |
| Temperature | 4,860±32[8] K |
| Metallicity [Fe/H] | −0.28±0.05[5] dex |
| Rotational velocity (v sin i) | 3.29±0.47[5] km/s |
| Age | 4.17±2.34[5] Myr |
| Other designations | |
| CD−64°676, GC 17573, HD 112410, HIP 63242, SAO 252106, 2MASS J12573196-6538472[9] | |
| Database references | |
| SIMBAD | data |
This is an aging giant star with a stellar classification of G8III.[4] It is cooling and expanding along the red giant branch,[6] having evolved off the main sequence after exhausting its core supply of hydrogen fuel. At present it has 10[2] times the Sun's radius. Mass estimates range from 1.21[5] up to 2.32[7] times the mass of the Sun. The star has a lower metallicity the Sun – what astronomers term the abundance of elements with more mass than helium – and it is spinning with a projected rotational velocity of 3.3 km/s.[5] It is radiating 46 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,860 K.[8]
Planetary system
HD 112410 has a substellar companion calculated to have a mass at least 9.2 times that of Jupiter and an orbital period of 124.6 days at a typical separation of approximately 0.57 astronomical units (AU). As of 2013, this is the nearest exoplanet orbiting around any ascending red giant branch star, and second-closest planet to a giant star after the companion of HIP 13044.[6]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination (°) |
Radius |
|---|---|---|---|---|---|---|
| HD 112410 b | >9.18 MJ | 0.565 | 124.6 | 0.23 | — | — |