HD 160342

HD 160342

A light curve for V626 Arae, plotted from Hipparcos data[1]
Observation data
Epoch J2000      Equinox J2000
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 mas[2]
Distance960 ± 20 ly
(293 ± 7 pc)
Absolute magnitude (MV)−0.45[7]
Details
Mass1.1[8] M☉
Radius95[9] R☉
Luminosity2,002[2] L☉
Surface gravity (log g)0.48[8] cgs
Temperature3,479[8] K
Metallicity [Fe/H]−0.05[8] dex
Other designations
CD−50°11474, HD 160342, HIP 86628, HR 6576, SAO 244954, V626 Arae.[5]
Database references
SIMBADdata

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], making it very faintly visible to the naked eye under ideal observing conditions. Based upon parallax measurements, is approximately 960 light-years (293 parsecs) distant from Earth.

In 1971, P. M. Corben announced that HD 160342 is a variable star, a discovery made using a telescope equipped with a photoelectric photometer at the Royal Observatory in South Africa.[11] It was given its variable star designation, V626 Arae, in 1973.[12]

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.[13]

References

  1. ^ "/ftp/cats/more/HIP/cdroms/cats". Centre de Données astronomiques de Strasbourg. Strasbourg astronomical Data Center. Retrieved 15 October 2022.
  2. ^ a b c d e f Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  3. ^ a b c 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. Bibcode:2017ARep...61...80S. doi:10.1134/S1063772917010085. ISSN 1063-7729. S2CID 255195566.
  4. ^ a b Houk, Nancy (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.
  5. ^ a b c "V626 Ara". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2022-11-23.
  6. ^ 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. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID 119231169.
  7. ^ 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. ^ a b c d 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. arXiv:1904.11302. Bibcode:2019A&A...628A..94A. doi:10.1051/0004-6361/201935765. ISSN 0004-6361.
  9. ^ Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv:1905.10694. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467. eISSN 1538-3881. hdl:1721.1/124721. S2CID 166227927.
  10. ^ a b Eggen, Olin J. (July 1992). "Asymptotic giant branch stars near the sun". Astronomical Journal. 104 (1): 275–313. Bibcode:1992AJ....104..275E. doi:10.1086/116239.
  11. ^ Corben, P. M. (1971). "Photoelectric Magnitudes and Colours for Bright Southern Stars". Monthly Notes of the Astron. Soc. Southern Africa. 30: 79–80. Bibcode:1971MNSSA..30...79C. Retrieved 25 November 2024.
  12. ^ Kukarkin, B. V.; Kholopov, P. N.; Kukarkina, N. P.; Perova, N. B. (October 1973). "59th Name-List of Variable Stars". Information Bulletin on Variable Stars. 834. Bibcode:1973IBVS..834....1K. Retrieved 25 November 2024.
  13. ^ 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.