Astronomy:HD 182509

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Short description: Star in the constellation of Telescopium
HD 182509
Observation data
Epoch J2000.0   Equinox (celestial coordinates)
Constellation Telescopium
Right ascension  19h 27m 48.11739s[1]
Declination −54° 19′ 30.9786″[1]
Apparent magnitude (V) 5.69±0.01[2]
Characteristics
Evolutionary stage red giant branch[3]
Spectral type K4 III[4]
U−B color index +1.68[5]
B−V color index +1.40[5]
Astrometry
Radial velocity (Rv)−5±4.3[6] km/s
Proper motion (μ) RA: −5.554[1] mas/yr
Dec.: +9.807[1] mas/yr
Parallax (π)5.1371 ± 0.0763[1] mas
Distance635 ± 9 ly
(195 ± 3 pc)
Absolute magnitude (MV)−0.38[7]
Details
Mass1.12[8] M☉
Radius32.6[9] R☉
Luminosity329[10] L☉
Surface gravity (log g)1.35[8] cgs
Temperature4,316±122[9] K
Metallicity [Fe/H]−0.02[8] dex
Rotational velocity (v sin i)<1[11] km/s
Other designations
CD−54°8308, CPD−54°9371, FK5 1504, GC 26834, HD 182509, HIP 95690, HR 7370, SAO 246110, WDS J19278-5420A[12]
Database references
SIMBADdata

HD 182509, also designated as HR 7370, is an orange hued star located in the southern constellation Telescopium. It has an apparent magnitude of 5.69,[2] making it faintly visible to the naked eye if viewed under ideal conditions. Parallax measurements place the object at a distance of 635 light years.[1] It has a poorly constrained heliocentric radial velocity of −5 km/s,[6] indicating that it is drifting towards the Solar System.

HD 182509 has a stellar classification of K4 III,[4] indicating that it is a red giant. Gaia DR3 stellar evolution models place it on the red giant branch.[3] It has 1.12 times the mass of the Sun[8] but has expanded to 32.6 times its girth.[9] It shines with a luminosity of 329 L☉[10] from its enlarged photosphere at an effective temperature of 4,316 K.[9] HD 182509 iron abundance is 95% that of the Sun, placing it at solar metallicity.[8] Like most giants, it spins slowly with a projected rotational velocity of <1 km/s.[11]

HD 182466 is a high proper motion star located 76.1″ away along a position angle of 236°.[13] Eggleton and Tokovonin (2008) list the pair as a binary star.[14] However, its parallax and proper motion indicate that it is instead a foreground object.[15] Components C and D are instead faint optical background objects, while the E component is probably non-existent.[13]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 Brown, A. G. A. (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics 649: A1. doi:10.1051/0004-6361/202039657. Bibcode: 2021A&A...649A...1G.  Gaia EDR3 record for this source at VizieR.
  2. ↑ 2.0 2.1 Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P. et al. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics 355: L27–L30. ISSN 0004-6361. Bibcode: 2000A&A...355L..27H. 
  3. ↑ 3.0 3.1 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.
  4. ↑ 4.0 4.1 Houk, N.; Cowley, A. P. (1975). University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Volume I. Declinations −90° to −53°. Bibcode: 1975mcts.book.....H. 
  5. ↑ 5.0 5.1 Oja, T. (1970). "UBV-Fotometri danska Tel (ESO)". Private Communication: 0. Bibcode: 1970Priv.........0O. 
  6. ↑ 6.0 6.1 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. ISSN 1063-7737. Bibcode: 2006AstL...32..759G. 
  7. ↑ Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331–346. doi:10.1134/S1063773712050015. ISSN 1063-7737. Bibcode: 2012AstL...38..331A. 
  8. ↑ 8.0 8.1 8.2 8.3 8.4 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. doi:10.1051/0004-6361/201935765. ISSN 0004-6361. Bibcode: 2019A&A...628A..94A. 
  9. ↑ 9.0 9.1 9.2 9.3 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. ↑ 10.0 10.1 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G.  Gaia DR2 record for this source at VizieR.
  11. ↑ 11.0 11.1 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. 
  12. ↑ "HR 7370". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HR+7370. 
  13. ↑ 13.0 13.1 Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (December 2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal 122 (6): 3466–3471. doi:10.1086/323920. ISSN 0004-6256. Bibcode: 2001AJ....122.3466M. 
  14. ↑ Eggleton, P. P.; Tokovinin, A. A. (11 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. ISSN 0035-8711. Bibcode: 2008MNRAS.389..869E. 
  15. ↑ Brown, A. G. A. (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics 649: A1. doi:10.1051/0004-6361/202039657. Bibcode: 2021A&A...649A...1G.  Gaia EDR3 record for this source at VizieR.
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