Astronomy:HD 152079
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Ara[1] |
| Right ascension | 16h 53m 05.755s[2] |
| Declination | –46° 19′ 58.64″[2] |
| Apparent magnitude (V) | 9.18[1] |
| Characteristics | |
| Spectral type | G6V[3] |
| Apparent magnitude (B) | 9.891[1] |
| Apparent magnitude (J) | 7.984±0.021[1] |
| Apparent magnitude (H) | 7.656±0.031[1] |
| Apparent magnitude (K) | 7.634±0.021[1] |
| B−V color index | 0.711±0.025[1] |
| Astrometry | |
| Radial velocity (Rv) | −21.338±0.0007[4] km/s |
| Proper motion (μ) | RA: −107.358[2] mas/yr Dec.: −93.597[2] mas/yr |
| Parallax (π) | 11.3545 ± 0.0142[2] mas |
| Distance | 287.2 ± 0.4 ly (88.1 ± 0.1 pc) |
| Absolute magnitude (MV) | 4.62[1] |
| Details | |
| Mass | 1.147±0.030[5] M☉ |
| Radius | 1.128±0.074[5] R☉ |
| Luminosity | 1.443[6] L☉ |
| Surface gravity (log g) | 4.365±0.054[5] cgs |
| Temperature | 5,907±52[5] K |
| Metallicity [Fe/H] | 0.29±0.07[5] dex |
| Rotational velocity (v sin i) | 2.6[6] km/s |
| Age | 6.2 Gyr[6] 1.622±1.369[5] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| Extrasolar Planets Encyclopaedia | data |
HD 152079 is a star with an orbiting exoplanet in the southern constellation of Ara. It is located at a distance of 287 light years from the Sun based on parallax measurements,[2] but is drifting closer with a radial velocity of −21 km/s.[4] At that distance the star is much too faint to be visible with the naked eye, having an apparent visual magnitude of 9.18.[1]
This is a G-type main-sequence star[8] with a stellar classification of G6V.[3] Age estimates range from 1.6[5] to 6.2[6] billion years. It has 1.15 times the mass of the Sun and 1.13 times the Sun's girth. This is a metal-rich star, having a higher iron abundance than in the Sun.[5] The star is radiating 1.44[6] times the luminosity of the Sun from its photosphere at an effective temperature of 5,907 K.[5]
Planetary system
It has one confirmed exoplanet, discovered in 2010 by the Magellan Planet Search Program. This is a super-jovian object with an eccentric orbit and a 8.0 yr orbital period.[8] In 2018, an analysis of HARPS data suggested the presence of an additional outer companion with a mass at least 83% of the mass of Jupiter.[5]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥ 2.661±0.046 MJ | 4.187+0.051−0.053 | 2,918.92+37.87−39.28 | 0.532+0.015−0.016 | — | — |
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A.
- ↑ 2.0 2.1 2.2 2.3 2.4 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 3.0 3.1 Houk, N. (1978). "Michigan Catalogue of two dimensional spectral types for the HD stars". Michigan Spectral Survey 2. Bibcode: 1978mcts.book.....H.
- ↑ 4.0 4.1 Soubiran, C. et al. (2018). "Gaia Data Release 2. The catalogue of radial velocity standard stars". Astronomy and Astrophysics 616: A7. doi:10.1051/0004-6361/201832795. Bibcode: 2018A&A...616A...7S.
- ↑ 5.00 5.01 5.02 5.03 5.04 5.05 5.06 5.07 5.08 5.09 5.10 Barbato, D. et al. (August 2018). "Exploring the realm of scaled solar system analogues with HARPS". Astronomy & Astrophysics 615: 21. doi:10.1051/0004-6361/201832791. A175. Bibcode: 2018A&A...615A.175B.
- ↑ 6.0 6.1 6.2 6.3 6.4 Pavlenko, Y. V. et al. (2019). "Masses, oxygen, and carbon abundances in CHEPS dwarf stars". Astronomy & Astrophysics 621: A112. doi:10.1051/0004-6361/201834138. Bibcode: 2019A&A...621A.112P.
- ↑ "HD 152079". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+152079.
- ↑ 8.0 8.1 Arriagada, Pamela et al. (2010). "Five Long-period Extrasolar Planets in Eccentric orbits from the Magellan Planet Search Program". The Astrophysical Journal 711 (2): 1229–35. doi:10.1088/0004-637X/711/2/1229. Bibcode: 2010ApJ...711.1229A.
Coordinates: 
16h 53m 29.74s, −46° 19′ 58.6″
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