HD 96819
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Hydra |
Right ascension | 11h 08m 43.99954s[1] |
Declination | −28° 04′ 50.4127″[1] |
Apparent magnitude (V) | 5.43[2] |
Characteristics | |
Spectral type | A1V[3] |
U−B color index | +0.06[4] |
B−V color index | +0.07[4] |
Astrometry | |
Radial velocity (Rv) | 16.00 ± 7.4[5] km/s |
Proper motion (μ) | RA: −72.79[1] mas/yr Dec.: −22.16[1] mas/yr |
Parallax (π) | 17.97 ± 0.53[1] mas |
Distance | 182 ± 5 ly (56 ± 2 pc) |
Absolute magnitude (MV) | 1.61[2] |
Details | |
Mass | 2.06 ± 0.03[3] M☉ |
Radius | 1.9[2] R☉ |
Luminosity | 20.66[3] L☉ |
Surface gravity (log g) | 4.22 ± 0.08[2] cgs |
Temperature | 8954[3] K |
Rotational velocity (v sin i) | 249[3] km/s |
Other designations | |
Database references | |
SIMBAD | data |
HD 96819 is a variable star[6] in the constellation of Hydra. It was formerly known by its designation 10 Crateris, but that name fell into disuse after constellations were redrawn and the star was no longer in Crater. Its apparent magnitude is 5.43.[2] Parallax measurements by Hipparcos put it at
This is a quickly rotating A-type main-sequence star that is about 2 times as massive as the Sun. It emits 20.66 times as much energy as the Sun, at a surface temperature of 8,954 K. HD 96819 is currently 31.5% through its life as a main-sequence star: after that it will swell up as a red giant.[3]
References
- 1 2 3 4 5 van Leeuwen, F.; et al. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
- 1 2 3 4 5 Allende Prieto, C.; Lambert, D. L. (1999). "Fundamental parameters of nearby stars from the comparison with evolutionary calculations: masses, radii and effective temperatures". Astronomy and Astrophysics. 352: 555–562. arXiv:astro-ph/9911002. Bibcode:1999A&A...352..555A.
- 1 2 3 4 5 6 Zorec, J.; Royer, F. (2012). "Rotational velocities of A-type stars. IV. Evolution of rotational velocities". Astronomy & Astrophysics. 537: A120. arXiv:1201.2052. Bibcode:2012A&A...537A.120Z. doi:10.1051/0004-6361/201117691.
- 1 2 Johnson, H. L. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory. 4: 99. Bibcode:1966CoLPL...4...99J.
- ↑ Kharchenko, N. V.; et al. (2007). "Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ~55000 stars and mean radial velocities of 516 Galactic open clusters and associations". Astronomische Nachrichten. 328 (9): 889. arXiv:0705.0878. Bibcode:2007AN....328..889K. doi:10.1002/asna.200710776.
- 1 2 "HD 96819". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 22 August 2017.
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