HD 160342

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HD 160342
V626AraLightCurve.png
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]
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
CD−50°11474, HD 160342, HIP 86628, HR 6576, SAO 244954, V626  Arae. [5]
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] 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. 1 2 3 4 5 6 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. 1 2 3 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. 1 2 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. 1 2 3 "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. 1 2 3 4 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. 1 2 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.
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