HR 6135
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Apus |
| Right ascension | 16h 34m 19.34576s[1] |
| Declination | −70° 59′ 17.1711″[1] |
| Apparent magnitude (V) | 5.50[2] |
| Characteristics | |
| Spectral type | K0.5IIbCN1[3] |
| B−V color index | 1.235±0.004[2] |
| Astrometry | |
| Radial velocity (Rv) | −9.37±0.14[1] km/s |
| Proper motion (μ) | RA: −15.292±0.110[1] mas/yr Dec.: +10.849±0.130[1] mas/yr |
| Parallax (π) | 3.4524 ± 0.0783 mas[1] |
| Distance | 940 ± 20 ly (290 ± 7 pc) |
| Absolute magnitude (MV) | −1.45[2] |
| Details | |
| Radius | 41.3+1.0 −2.8[1] R☉ |
| Luminosity | 677±19[1] L☉ |
| Temperature | 4,584+166 −54[1] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
HR 6135 is single[5] star in the southern constellation of Apus, less than a degree from the northern constellation border with Triangulum Australe. Its declination of minus 70° 59.4' puts it just within 20 degrees of the southern celestial pole. The star has an orange hue and is faintly visible to the naked eye with an apparent visual magnitude of 5.50,[2] making it the 12th-brightest star in the constellation. It is located at a distance of approximately 940 light years from the Sun based on parallax, but is drifting closer with a radial velocity of −9 km/s.[1] It has an absolute magnitude of −1.45.[2]
This is an aging bright giant with a stellar classification of K0.5IIbCN1,[3] where the suffix notation indicates an anomalous overabundance of cyanogen in the spectrum. It is a mild barium star, which may indicate it is on the asymptotic giant branch stage of its evolution.[6] The star has expanded to 41 times the radius of the Sun and is radiating 677 times the Sun's luminosity from its swollen photosphere at an effective temperature of 4,584 K.[1]
References
- ^ a b c d e f g h i j k 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.
- ^ a b c d e Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015.
- ^ a b Keenan, Philip C.; McNeil, Raymond C. (1989). "The Perkins catalog of revised MK types for the cooler stars". The Astrophysical Journal Supplement Series. 71: 245. Bibcode:1989ApJS...71..245K. doi:10.1086/191373.
- ^ "HD 148488". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-08-04.
- ^ Eggleton, P. P.; Tokovinin, A. A. (September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869–879. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x.
{{cite journal}}: CS1 maint: unflagged free DOI (link) - ^ Gomez, A. E.; et al. (1997). "Absolute magnitudes and kinematics of barium stars". Astronomy and Astrophysics. 319: 881. Bibcode:1997A&A...319..881G.
