Astronomy:HD 112410
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Musca |
| Right ascension | 12h 57m 31.95991s[1] |
| Declination | −65° 38′ 47.2594″[1] |
| Apparent magnitude (V) | 6.86[2] |
| Characteristics | |
| Evolutionary stage | red giant branch |
| Spectral type | G8III[3] |
| B−V color index | 1.018±0.008[2] |
| Astrometry | |
| Radial velocity (Rv) | 72.82±0.15[1] km/s |
| Proper motion (μ) | RA: −65.486±0.043[1] mas/yr Dec.: +31.269±0.038[1] mas/yr |
| Parallax (π) | 6.3628 ± 0.0284[1] mas |
| Distance | 513 ± 2 ly (157.2 ± 0.7 pc) |
| Absolute magnitude (MV) | 1.22[2] |
| Details[4] | |
| Mass | 1.21±0.25[4] 1.54±0.05[5] 2.32±0.23[6] M☉ |
| Radius | 10.28+0.11 −0.17[1] R☉ |
| Luminosity | 50.5±0.4[1] L☉ |
| Surface gravity (log g) | 2.49±0.06 cgs |
| Temperature | 4,793±22 K |
| Metallicity [Fe/H] | −0.28±0.05 dex |
| Rotational velocity (v sin i) | 3.29±0.47 km/s |
| Age | 4.17±2.34 Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
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.[2] 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.[1] It has an absolute magnitude of 1.22.[2]
This is an aging giant star with a stellar classification of G8III.[3] It is cooling and expanding along the red giant branch,[5] having evolved off the main sequence after exhausting its core supply of hydrogen fuel. At present it has 10[1] times the Sun's radius. Mass estimates range from 1.21[4] up to 2.32[6] 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.[4] It is radiating 50.5[1] times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,793 K.[4]
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.[5]
| 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 | — | — |
References
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A.
- ↑ 3.0 3.1 Houk, Nancy (1979). Michigan catalogue of two-dimensional spectral types for the HD stars. 1. Ann Arbor, Michigan: Department of Astronomy, University of Michigan. Bibcode: 1978mcts.book.....H.
- ↑ 4.0 4.1 4.2 4.3 4.4 Jofré, E. et al. (2015). "Stellar parameters and chemical abundances of 223 evolved stars with and without planets". Astronomy & Astrophysics 574: A50. doi:10.1051/0004-6361/201424474. Bibcode: 2015A&A...574A..50J.
- ↑ 5.0 5.1 5.2 Jones, M. I. et al. (2013). "Study of the Impact of the Post-MS evolution of the Host Star on the Orbits of Close-in Planets. II. A Giant Planet in a Close-in Orbit around the RGB Star HIP 63242". Astronomy & Astrophysics 556 (A78): 5. doi:10.1051/0004-6361/201321660. Bibcode: 2013A&A...556A..78J.
- ↑ 6.0 6.1 Sousa, S. G. et al. (November 2018). "SWEET-Cat updated. New homogenous spectroscopic parameters". Astronomy & Astrophysics 620: 13. doi:10.1051/0004-6361/201833350. A58. Bibcode: 2018A&A...620A..58S.
- ↑ "HD 112410". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+112410.
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