HD 33519

From Justapedia, unleashing the power of collective wisdom
Jump to navigation Jump to search
HD 33519
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Mensa
Right ascension 05h 00m 13.23704s[1]
Declination −78° 18′ 00.0987″[1]
Apparent magnitude (V) 6.28±0.01[2]
Characteristics
Evolutionary stage red giant branch[1]
Spectral type K5/M0 III[3]
U−B color index +1.87[4]
B−V color index +1.51[4]
Astrometry
Radial velocity (Rv)−2.5±2.3[5] km/s
Proper motion (μ) RA: −17.781 mas/yr[1]
Dec.: +1.497 mas/yr[1]
Parallax (π)3.4534 ± 0.0872 mas[1]
Distance940 ± 20 ly
(290 ± 7 pc)
Absolute magnitude (MV)−0.88[6]
Details
Mass4.34[7] M☉
Radius45.4[8] R☉
Luminosity465[9] L☉
Surface gravity (log g)1.45+0.02
−0.03[1] cgs
Temperature4,118±122[8] K
Metallicity [Fe/H]−0.01[10] dex
Rotational velocity (v sin i)<1[11] km/s
Other designations
19 G. Mensae[12], CD−78°190, CPD−78°165, HD 33519, HIP 23251, HR 1682, SAO 256153, WDS J05002-7818A[13]
Database references
SIMBADdata

HD 33519, also known as HR 1682, is a probable spectroscopic binary[11] located in the southern circumpolar constellation Mensa. It is one of the stars near the limit of naked eye visibility, having an apparent magnitude of 6.28.[2] The system is relatively far at a distance of 940 light years[1] but is approaching with a heliocentric radial velocity of −2.5 km/s.[5] However, this value is poorly constrained.

The visible component has a stellar classification of K5/M0 III,[3] indicating an evolved red giant with the characteristics of a K5 and M0 giant star. At present it has 4.34 times the mass of the Sun[7] but has expanded to 45.4 times its girth.[8] It shines with a luminosity of 465 L☉[9] from its enlarged photosphere at an effective temperature of 4,118 K,[8] giving it an orange-red hue when viewed in the night sky. HD 33519's metallicity, what astronomers dub as elements heavier than helium, is around solar level.[10] Like most giants, it spins slowly, with its projected rotational velocity being lower than 1 km/s.[11]

There is an 11th magnitude optical companion located 50.2″ away along a position angle of 110°.[14] It has no relation to the system, having a drastically different proper motion.[14]

References

  1. ^ a b c d e f g Vallenari, A.; et al. (Gaia Collaboration) (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. arXiv:2208.00211. doi:10.1051/0004-6361/202243940. Gaia DR3 record for this source at VizieR.
  2. ^ a b Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H. ISSN 0004-6361.
  3. ^ a b 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.
  4. ^ a b Johnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewski, W. Z. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory. 4: 99–110. Bibcode:1966CoLPL...4...99J.
  5. ^ a b 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. eISSN 1562-6873. ISSN 1063-7737. S2CID 119231169.
  6. ^ Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. eISSN 1562-6873. ISSN 1063-7737. S2CID 119257644.
  7. ^ a b Kervella, Pierre; Arenou, Frédéric; Thévenin, Frédéric (2022). "Stellar and substellar companions from Gaia EDR3". Astronomy & Astrophysics. 657: A7. arXiv:2109.10912. Bibcode:2022A&A...657A...7K. doi:10.1051/0004-6361/202142146. eISSN 1432-0746. ISSN 0004-6361.
  8. ^ a b c d 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.
  9. ^ a b Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  10. ^ a b 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. eISSN 1432-0746. ISSN 0004-6361.
  11. ^ a b c 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. arXiv:1312.3474. Bibcode:2014A&A...561A.126D. doi:10.1051/0004-6361/201220762. eISSN 1432-0746. ISSN 0004-6361.
  12. ^ Gould, Benjamin Apthorp (1878). "Uranometria Argentina : brillantez y posicion de las estrellas fijas, hasta la septima magnitud, comprendidas dentro de cien grados del polo austral : con atlas". Resultados del Observatorio Nacional Argentino. 1. Bibcode:1879RNAO....1.....G.
  13. ^ "HR 1682". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved August 15, 2022.
  14. ^ a b 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. Bibcode:2001AJ....122.3466M. doi:10.1086/323920. ISSN 0004-6256.
Retrieved from "https://justapedia.org/index.php?title=HD_33519&oldid=1117452687"