| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aries |
| Right ascension | 01h 59m 35.68394s [1] |
| Declination | 21° 03′ 30.8472″ [1] |
| Apparent magnitude (V) | 5.89 [2] |
| Characteristics | |
| Spectral type | K0III-IV [3] |
| B−V color index | 1.031±0.015 [2] |
| Astrometry | |
| Radial velocity (Rv) | −1.65±0.20 [1] km/s |
| Proper motion (μ) |
RA: +141.014
[1]
mas/
yr Dec.: -14.643 [1] mas/ yr |
| Parallax (π) | 9.3049 ± 0.0967 mas [1] |
| Distance | 351 ± 4
ly (107 ± 1 pc) |
| Absolute magnitude (MV) | 0.50 [2] |
| Details | |
| Mass | 1.69±0.48 [4] M☉ |
| Radius | 11.12+0.34 −0.13 [1] R☉ |
| Luminosity | 58.2±0.7 [1] L☉ |
| Surface gravity (log g) | 2.50±0.11 [4] cgs |
| Temperature | 4,780+120 −70 [1] K |
| Metallicity [Fe/H] | −0.02±0.05 [4] dex |
| Age | 2.0+1.0 −0.6 [4] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 12139 is an orange-hued star in the northern zodiac constellation of Aries. With an apparent visual magnitude of 5.89, it is a dim star that is just visible to the naked eye under good viewing conditions. It is located approximately 351 light-years (107.5 pc) distant from the Sun, based on parallax, [2] but is drifting closer with a radial velocity of −2 km/s. [1] With high probability, it is considered a member of the Hercules stream. [6]
This object is an aging red giant [7] with a stellar classification of K0III-IV, [3] meaning that it has used up its core hydrogen and is expanding. At present it has 11 [1] times the girth of the Sun. The star is about two [4] billion years old with 1.7 [4] times the mass of the Sun. It is radiating 58 [1] times the luminosity of the Sun from its photosphere at an effective temperature of 4,780 K. [1]
A magnitude 9.36 companion is located at an angular separation of 199.70 ″ from the primary along a position angle of 9°, as of 2015. It is unclear if the two are physically associated. [8]
- ^ a b c d e f g h i j k l m Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv: 1804.09365. Bibcode: 2018A&A...616A...1G. doi: 10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ a b c d Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv: 1108.4971. Bibcode: 2012AstL...38..331A. doi: 10.1134/S1063773712050015. S2CID 119257644.
- ^ a b Yoss, Kenneth M. (November 1961). "Spectral and Luminosity Classifications and Measurements of the Strength of Cyanogen Absorption for Late-Type Stars from Objective-Prism Spectra". Astrophysical Journal. 134: 809. Bibcode: 1961ApJ...134..809Y. doi: 10.1086/147209.
- ^ a b c d e f Feuillet, Diane K.; et al. (2016). "Determining Ages of APOGEE Giants with Known Distances". The Astrophysical Journal. 817 (1): 40. arXiv: 1511.04088. Bibcode: 2016ApJ...817...40F. doi: 10.3847/0004-637X/817/1/40. S2CID 118675933.
- ^ "HD 12139". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-11-13.
- ^ Ramya, P.; et al. (August 2016). "Chemical compositions and kinematics of the Hercules stream". Monthly Notices of the Royal Astronomical Society. 460 (2): 1356−1370. arXiv: 1604.04821. Bibcode: 2016MNRAS.460.1356R. doi: 10.1093/mnras/stw852.
- ^ Takeda, Yoichi; Tajitsu, Akito (2014). "Spectroscopic study on the beryllium abundances of red giant stars". Publications of the Astronomical Society of Japan. 66 (5): 91. arXiv: 1406.7066. Bibcode: 2014PASJ...66...91T. doi: 10.1093/pasj/psu066.
- ^ Mason, B. D.; et al. (2014). "The Washington Visual Double Star Catalog". The Astronomical Journal. 122 (6): 3466. Bibcode: 2001AJ....122.3466M. doi: 10.1086/323920.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aries |
| Right ascension | 01h 59m 35.68394s [1] |
| Declination | 21° 03′ 30.8472″ [1] |
| Apparent magnitude (V) | 5.89 [2] |
| Characteristics | |
| Spectral type | K0III-IV [3] |
| B−V color index | 1.031±0.015 [2] |
| Astrometry | |
| Radial velocity (Rv) | −1.65±0.20 [1] km/s |
| Proper motion (μ) |
RA: +141.014
[1]
mas/
yr Dec.: -14.643 [1] mas/ yr |
| Parallax (π) | 9.3049 ± 0.0967 mas [1] |
| Distance | 351 ± 4
ly (107 ± 1 pc) |
| Absolute magnitude (MV) | 0.50 [2] |
| Details | |
| Mass | 1.69±0.48 [4] M☉ |
| Radius | 11.12+0.34 −0.13 [1] R☉ |
| Luminosity | 58.2±0.7 [1] L☉ |
| Surface gravity (log g) | 2.50±0.11 [4] cgs |
| Temperature | 4,780+120 −70 [1] K |
| Metallicity [Fe/H] | −0.02±0.05 [4] dex |
| Age | 2.0+1.0 −0.6 [4] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 12139 is an orange-hued star in the northern zodiac constellation of Aries. With an apparent visual magnitude of 5.89, it is a dim star that is just visible to the naked eye under good viewing conditions. It is located approximately 351 light-years (107.5 pc) distant from the Sun, based on parallax, [2] but is drifting closer with a radial velocity of −2 km/s. [1] With high probability, it is considered a member of the Hercules stream. [6]
This object is an aging red giant [7] with a stellar classification of K0III-IV, [3] meaning that it has used up its core hydrogen and is expanding. At present it has 11 [1] times the girth of the Sun. The star is about two [4] billion years old with 1.7 [4] times the mass of the Sun. It is radiating 58 [1] times the luminosity of the Sun from its photosphere at an effective temperature of 4,780 K. [1]
A magnitude 9.36 companion is located at an angular separation of 199.70 ″ from the primary along a position angle of 9°, as of 2015. It is unclear if the two are physically associated. [8]
- ^ a b c d e f g h i j k l m Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv: 1804.09365. Bibcode: 2018A&A...616A...1G. doi: 10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ a b c d Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv: 1108.4971. Bibcode: 2012AstL...38..331A. doi: 10.1134/S1063773712050015. S2CID 119257644.
- ^ a b Yoss, Kenneth M. (November 1961). "Spectral and Luminosity Classifications and Measurements of the Strength of Cyanogen Absorption for Late-Type Stars from Objective-Prism Spectra". Astrophysical Journal. 134: 809. Bibcode: 1961ApJ...134..809Y. doi: 10.1086/147209.
- ^ a b c d e f Feuillet, Diane K.; et al. (2016). "Determining Ages of APOGEE Giants with Known Distances". The Astrophysical Journal. 817 (1): 40. arXiv: 1511.04088. Bibcode: 2016ApJ...817...40F. doi: 10.3847/0004-637X/817/1/40. S2CID 118675933.
- ^ "HD 12139". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-11-13.
- ^ Ramya, P.; et al. (August 2016). "Chemical compositions and kinematics of the Hercules stream". Monthly Notices of the Royal Astronomical Society. 460 (2): 1356−1370. arXiv: 1604.04821. Bibcode: 2016MNRAS.460.1356R. doi: 10.1093/mnras/stw852.
- ^ Takeda, Yoichi; Tajitsu, Akito (2014). "Spectroscopic study on the beryllium abundances of red giant stars". Publications of the Astronomical Society of Japan. 66 (5): 91. arXiv: 1406.7066. Bibcode: 2014PASJ...66...91T. doi: 10.1093/pasj/psu066.
- ^ Mason, B. D.; et al. (2014). "The Washington Visual Double Star Catalog". The Astronomical Journal. 122 (6): 3466. Bibcode: 2001AJ....122.3466M. doi: 10.1086/323920.