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]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| 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 mas[1] |
| 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 |
References
edit- ^ a b c d e f g 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.
- ^ Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27. Bibcode:2000A&A...355L..27H. doi:10.1888/0333750888/2862.
- ^ Houk, N.; Swift, C. (1999). "Michigan catalogue of two-dimensional spectral types for the HD Stars". Michigan Spectral Survey. 05. Bibcode:1999MSS...C05....0H.
- ^ a b c d e King, Jeremy R.; et al. (November 2005). "Keck HIRES Spectroscopy of Four Candidate Solar Twins". The Astronomical Journal. 130 (5): 2318–2325. arXiv:astro-ph/0508004. Bibcode:2005AJ....130.2318K. doi:10.1086/452640. S2CID 6535115.
- ^ "HD 143436". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-12-05.
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