Astronomy:HR 6135
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Apus |
| Right ascension | 16h 34m 19.34618s[1] |
| Declination | −70° 59′ 17.1680″[1] |
| Apparent magnitude (V) | 5.50[2] |
| Characteristics | |
| Evolutionary stage | red giant branch[1] |
| Spectral type | K0.5 IIb CN1[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: −15.427±0.036[1] mas/yr Dec.: −11.056±0.046[1] mas/yr |
| Parallax (π) | 3.2585 ± 0.0357[1] mas |
| Distance | 1,000 ± 10 ly (307 ± 3 pc) |
| Absolute magnitude (MV) | −1.45[2] |
| Details | |
| Mass | 5.4[1] M☉ |
| Radius | 49[1] R☉ |
| Luminosity | 843[1] L☉ |
| Surface gravity (log g) | 1.66[1] cgs |
| Temperature | 4,592[1] K |
| Rotational velocity (v sin i) | 4.2[4] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
HR 6135 is single[6] star in the southern constellation of Apus, less than a degree from the northern constellation border with Triangulum Australe. Its declination of −70° 59.3′ 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 1,000 light years from the Sun based on parallax, but is drifting closer with a radial velocity of −9.5 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.[7] The star has expanded to 49 times the radius of the Sun and is radiating 843 times the Sun's luminosity from its swollen photosphere at an effective temperature of 4,592 K.[1]
References
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 1.12 1.13 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A.
- ↑ 3.0 3.1 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. doi:10.1086/191373. Bibcode: 1989ApJS...71..245K.
- ↑ De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (January 2014). "A catalog of rotational and radial velocities for evolved stars". Astronomy & Astrophysics 561: A126. doi:10.1051/0004-6361/201220762. ISSN 0004-6361. Bibcode: 2014A&A...561A.126D.
- ↑ "HD 148488". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+148488.
- ↑ 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. doi:10.1111/j.1365-2966.2008.13596.x. Bibcode: 2008MNRAS.389..869E.
- ↑ Gomez, A. E. et al. (1997). "Absolute magnitudes and kinematics of barium stars". Astronomy and Astrophysics 319: 881. Bibcode: 1997A&A...319..881G.
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