Astronomy:HD 143436
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Short description: Star in the constellation Serpens
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Serpens |
| Right ascension | 16h 00m 18.83726s[1] |
| Declination | +00° 08′ 13.2306″[1] |
| Apparent magnitude (V) | 8.03[2] |
| Characteristics | |
| Spectral type | G3V[3] |
| B−V color index | 0.644[4] |
| Astrometry | |
| Radial velocity (Rv) | −24.7±0.7[4] km/s |
| Proper motion (μ) | RA: −136.615[1] mas/yr Dec.: −108.779[1] mas/yr |
| Parallax (π) | 22.3164 ± 0.0456[1] mas |
| Distance | 146.2 ± 0.3 ly (44.81 ± 0.09 pc) |
| Absolute magnitude (MV) | 4.87±0.10[4] |
| Details[4] | |
| Mass | 1.01±0.02 M☉ |
| Radius | 1.01+0.01 −0.04[1] R☉ |
| Luminosity | 1.047±0.003[1] L☉ |
| Surface gravity (log g) | 4.28±0.12 cgs |
| Temperature | 5,768±43 K |
| Metallicity [Fe/H] | 0.008 dex |
| Rotational velocity (v sin i) | < 2.6 km/s |
| Age | 3.8±2.9 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 143436 also known as HIP 78399, is a G-type star in the constellation Serpens. The temperature, rotation, mass, and abundance of elements in this star are close to properties of the Sun, and for this reason it is a solar twin candidate. The only notable difference is an approximately six times higher abundance of lithium compared to the Sun and most likely a younger age of 3.8 Gyr. The space velocity components of this star are (U, V, W) = (−19.2, −38.6, −7.0) km/s.[4]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 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.
- ↑ Høg, E. et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics 355: L27. doi:10.1888/0333750888/2862. Bibcode: 2000A&A...355L..27H.
- ↑ Houk, N.; Swift, C. (1999). "Michigan catalogue of two-dimensional spectral types for the HD Stars". Michigan Spectral Survey 05. Bibcode: 1999MSS...C05....0H.
- ↑ 4.0 4.1 4.2 4.3 4.4 King, Jeremy R. et al. (November 2005). "Keck HIRES Spectroscopy of Four Candidate Solar Twins". The Astronomical Journal 130 (5): 2318–2325. doi:10.1086/452640. Bibcode: 2005AJ....130.2318K.
- ↑ "HD 143436". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+143436.
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