HD 151967 is suspected variable star in the southern constellation of Ara. It is a sixth magnitude star,[3] which means it is just visible to the naked eye in dark skies. Parallax measurements place it at a distance of approximately 710 light years from the Earth.[2]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Ara |
| Right ascension | 16h 54m 00.36029s[2] |
| Declination | −57° 54′ 34.2317″[2] |
| Apparent magnitude (V) | 5.92[3] |
| Characteristics | |
| Spectral type | M1III[4] |
| U−B color index | +1.92[3] |
| B−V color index | +1.60[3] |
| Variable type | Suspected |
| Astrometry | |
| Radial velocity (Rv) | -40.7[5] km/s |
| Proper motion (μ) | RA: -40.18[2] mas/yr Dec.: -123.26[2] mas/yr |
| Parallax (π) | 4.60 ± 0.47 mas[2] |
| Distance | approx. 710 ly (approx. 220 pc) |
| Details | |
| Radius | 53[6] R☉ |
| Luminosity | 637[7] L☉ |
| Temperature | 3,839[7] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
This is a red giant with a stellar classification of M1III;[4] it has expanded to 53[6] times the radius of the Sun and radiates 637[7] times the Sun's luminosity. The star varies in brightness by an amplitude of 0.0156 in magnitude over a period of 26 days.[8] The effective temperature of the outer atmosphere is 3,839 K,[7] giving it the ruddy hue of an M-type star.[9]
References
edit- ^ "Light Curve", Hipparcos ESA, ESA, retrieved 29 September 2022.
- ^ a b c d e f van Leeuwen, F. (November 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, S2CID 18759600.
- ^ a b c d Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data. SIMBAD, Bibcode:1986EgUBV........0M.
- ^ a b Houk, Nancy; Cowley, A. P. (1979), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 1, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H.
- ^ Evans, D. S. (June 20–24, 1966), Batten, Alan Henry; Heard, John Frederick (eds.), "The Revision of the General Catalogue of Radial Velocities", Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30, vol. 30, University of Toronto: International Astronomical Union, p. 57, Bibcode:1967IAUS...30...57E.
- ^ a b Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics", Astronomy and Astrophysics, 367 (2): 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID 425754.
- ^ a b c d McDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–57, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x, S2CID 118665352.
- ^ Koen, Chris; Eyer, Laurent (March 2002), "New periodic variables from the Hipparcos epoch photometry", Monthly Notices of the Royal Astronomical Society, 331 (1): 45–59, arXiv:astro-ph/0112194, Bibcode:2002MNRAS.331...45K, doi:10.1046/j.1365-8711.2002.05150.x, S2CID 10505995.
- ^ "The Colour of Stars", Australia Telescope, Outreach and Education, Commonwealth Scientific and Industrial Research Organisation, December 21, 2004, archived from the original on March 18, 2012, retrieved 2015-08-25.
External links
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