HD 186302
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| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Pavo |
| Right ascension | 19h 49m 6.43s[1] |
| Declination | −70° 11′ 16.7″[1] |
| Apparent magnitude (V) | 8.76[1] |
| Characteristics | |
| Spectral type | G3/5V[1] |
| B−V color index | 0.67 |
| Astrometry | |
| Proper motion (μ) | RA: -23.954 [1] mas/yr Dec.: -38.710[1] mas/yr |
| Parallax (π) | 17.7148 ± 0.0310[1] mas |
| Distance | 184.1 ± 0.3 ly (56.45 ± 0.10 pc) |
| Details[2] | |
| Mass | 0.97±0.01 M☉ |
| Radius | 0.95±0.01 R☉ |
| Surface gravity (log g) | 4.47±0.01 cgs |
| Temperature | 5675±15 K |
| Metallicity [Fe/H] | 0.00±0.01 dex |
| Age | 4.5±0.81 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 186302 (also designated HIP 97507)[1] is a star in the constellation of Pavo. It is about 184 light-years (56 parsecs) away from Earth, with an apparent magnitude of 8.76.[1] It was identified in November 2018 as a potential solar sibling to the Sun. It is very similar to the Sun; the Sun is a G2V star. Similar by spectrum and size, it was suspected to have formed in the same stellar nursery as the Sun 4.57 billion years ago.[3] Common origin with Sun was found to be unlikely in 2019 paper though, as HD 186302 galactic orbit is very different from Sun's.[4]
See also[]
References[]
- ^ a b c d e f g h i "HD 186302". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved November 24, 2018.
- ^ The AMBRE project: searching for the closest solar siblings, V. Adibekyan, P. de Laverny, A. Recio-Blanco, S. G. Sousa, E. Delgado-Mena, G. Kordopatis, A. C. S. Ferreira, N. C. Santos, A. A. Hakobyan and M. Tsantaki, Received 19 September 2018 / Accepted 3 October 2018
- ^ Did Astronomers Just Find The Sun’s Sister? Bob P. King, November 24, 2018
- ^ Searching for Solar Siblings in APOGEE and Gaia DR2 with N-body Simulations, 2019, arXiv:1910.01646
- ^ Searching for solar siblings among the HARPS data, 2014, arXiv:1403.1506
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Categories:
- Solar twins
- G-type main-sequence stars
- Henry Draper Catalogue objects
- Hipparcos objects
- 2MASS objects
- Pavo (constellation)
- Main-sequence-star stubs