Astronomy:HD 160342
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Short description: Star in the constellation Ara
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Ara |
| Right ascension | 17h 42m 03.62014s[2] |
| Declination | −50° 30′ 38.5331″[2] |
| Apparent magnitude (V) | 6.23 - 6.46[3] |
| Characteristics | |
| Spectral type | M3 III[4] |
| U−B color index | +1.96[5] |
| B−V color index | +1.73[5] |
| R−I color index | 0.85 |
| Variable type | LB[3] |
| Astrometry | |
| Radial velocity (Rv) | −27.1±0.4[6] km/s |
| Proper motion (μ) | RA: +3.096[2] mas/yr Dec.: −15.788[2] mas/yr |
| Parallax (π) | 3.4132 ± 0.0864[2] mas |
| Distance | 960 ± 20 ly (293 ± 7 pc) |
| Absolute magnitude (MV) | −0.45[7] |
| Details | |
| Mass | 1.1[8] M☉ |
| Radius | 95[9] R☉ |
| Luminosity | 2,002[2] L☉ |
| Surface gravity (log g) | 0.48[8] cgs |
| Temperature | 3,479[8] K |
| Metallicity [Fe/H] | −0.05[8] dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 160342 is a star in the southern constellation of Ara. HD 160342 is its Henry Draper Catalogue designation. It has an apparent visual magnitude of 6.35[10] and, based upon parallax measurements, is approximately 960 light-years (293 parsecs) distant from Earth.
With a stellar classification of M3 III.[4], this is an evolved red giant that is on the asymptotic giant branch.[10] It is a variable star that is classified as irregular,[3] although changes in brightness of 0.1127 magnitudes at the rate of 0.37943 cycles per day (once every 2.6 days) have been detected in Hipparcos photometry.[11] It has been given the variable star designation V626 Arae (V626 Ara).
References
- ↑ "/ftp/cats/more/HIP/cdroms/cats". Strasbourg astronomical Data Center. https://cdsarc.cds.unistra.fr/viz-bin/ftp-index?/ftp/cats/more/HIP/cdroms/cats.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 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.
- ↑ 3.0 3.1 3.2 Samus’, N. N.; Kazarovets, E. V.; Durlevich, O. V.; Kireeva, N. N.; Pastukhova, E. N. (January 2017). "General catalogue of variable stars: Version GCVS 5.1". Astronomy Reports 61 (1): 80–88. doi:10.1134/S1063772917010085. ISSN 1063-7729. Bibcode: 2017ARep...61...80S.
- ↑ 4.0 4.1 Houk, Nancy (1979). Michigan catalogue of two-dimensional spectral types for the HD stars. 1. Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan. Bibcode: 1978mcts.book.....H.
- ↑ 5.0 5.1 5.2 "V626 Ara". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=V626+Ara.
- ↑ Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters 32 (11): 759–771. doi:10.1134/S1063773706110065. Bibcode: 2006AstL...32..759G.
- ↑ Gontcharov, G. A. (2017). "VizieR Online Data Catalog: Tycho-2 red giant branch and carbon stars (Gontcharov, 2011)". VizieR On-Line Data Catalog. Bibcode: 2017yCat..90370769G.
- ↑ 8.0 8.1 8.2 8.3 Anders, F. et al. (August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy & Astrophysics 628: A94. doi:10.1051/0004-6361/201935765. ISSN 0004-6361. Bibcode: 2019A&A...628A..94A.
- ↑ Stassun, Keivan G. et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal 158 (4): 138. doi:10.3847/1538-3881/ab3467. Bibcode: 2019AJ....158..138S.
- ↑ 10.0 10.1 Eggen, Olin J. (July 1992). "Asymptotic giant branch stars near the sun". Astronomical Journal 104 (1): 275–313. doi:10.1086/116239. Bibcode: 1992AJ....104..275E.
- ↑ 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. doi:10.1046/j.1365-8711.2002.05150.x. Bibcode: 2002MNRAS.331...45K.
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