HD 32453

HD 32453
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Caelum[1]
Right ascension 05h 01m 34.5225s[2]
Declination −39° 43′ 04.964″[2]
Apparent magnitude (V) 6.01±0.01[3]
Characteristics
Spectral type G8 III[4]
B−V color index +0.88[5]
Astrometry
Radial velocity (Rv)5.73±0.12[2] km/s
Proper motion (μ) RA: −5.456[2] mas/yr
Dec.: +32.717[2] mas/yr
Parallax (π)8.0168±0.0344 mas[2]
Distance407 ± 2 ly
(124.7 ± 0.5 pc)
Absolute magnitude (MV)+0.78[1]
Details
Mass2.40[6] M☉
Radius10.03[7][8] R☉
Luminosity50.1[9] L☉
Surface gravity (log g)3.18±0.14[10] cgs
Temperature5,032±61[9] K
Metallicity [Fe/H]−0.02±0.13[10] dex
Rotational velocity (v sin i)2±1.4[11] km/s
Age700[6] Myr
Other designations
CD−39°1744, HD 32453, HIP 23377, HR 1631, SAO 195501
Database references
SIMBADdata

HD 32453 (HR 1631) is a solitary star located in the southern constellation Caelum. With an apparent magnitude of 6.01,[3] it's barely visible to the naked eye under ideal conditions. This star is located 407 light years away based on its parallax shift, but is drifting away at a rate of 5.73 km/s.[2]

This star was designated Epsilon Caeli by Johann Elert Bode in his 1801 Uranographia, but this is now no longer used.[12]

HD 32453 has a classification of G8 III,[4] which states it is an evolved G-type star that exhausted hydrogen at its core and left the main sequence. At present it has 2.40[6] times the Sun's mass, but at an age of 700 million years,[6] HD 32453 has expanded to 10[7] times the latter's girth (radius detected from an angular diameter of 0.748 mas[8]). It radiates at 50[9] solar luminosities from its enlarged photosphere at an effective temperature of 5,032 K,[9] which gives it a yellow hue. HD 32453 is slightly metal deficient,[10] and spins slowly with a projected rotational velocity of 2 km/s,[11] common for a giant star.

References

  1. ^ a b Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. XHIP record for this object at VizieR.
  2. ^ a b c d e f g 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.
  3. ^ 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.
  4. ^ a b Houk, N. (1 January 1982). Michigan Catalogue of Two-dimensional Spectral Types for the HD stars. Volume_3. Declinations -40_ƒ0 to -26_ƒ0. Bibcode:1982mcts.book.....H.
  5. ^ Johnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewski, W. Z. (1 January 1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory. 4: 99–110. Bibcode:1966CoLPL...4...99J.
  6. ^ a b c d Demarque, Pierre; Woo, Jong-Hak; Kim, Yong-Cheol; Yi, Sukyoung K. (December 2004). "Y 2 Isochrones with an Improved Core Overshoot Treatment". The Astrophysical Journal Supplement Series. 155 (2): 667–674. arXiv:astro-ph/0409024. Bibcode:2004ApJS..155..667D. doi:10.1086/424966. ISSN 1538-4357.
  7. ^ a b Lang, Kenneth R. (2006), Astrophysical formulae, Astronomy and astrophysics library, vol. 1 (3 ed.), Birkhäuser, ISBN 3-540-29692-1. The radius (R*) is given by:
  8. ^ a b Stevens, Daniel J.; Stassun, Keivan G.; Gaudi, B. Scott (1 December 2017). "Empirical Bolometric Fluxes and Angular Diameters of 1.6 Million Tycho-2 Stars and Radii of 350,000 Stars with Gaia DR1 Parallaxes". The Astronomical Journal. 154 (6): 259. arXiv:1708.05025. Bibcode:2017AJ....154..259S. doi:10.3847/1538-3881/aa957b. ISSN 0004-6256. S2CID 119191064.
  9. ^ a b c d Luck, R. Earle (25 August 2015). "Abundances in the Local Region. I. G and K Giants". The Astronomical Journal. 150 (3): 88. arXiv:1507.01466. Bibcode:2015AJ....150...88L. doi:10.1088/0004-6256/150/3/88. ISSN 1538-3881.
  10. ^ a b c Alves, S.; Benamati, L.; Santos, N. C.; Adibekyan, V. Zh.; Sousa, S. G.; Israelian, G.; De Medeiros, J. R.; Lovis, C.; Udry, S. (11 April 2015). "Determination of the spectroscopic stellar parameters for 257 field giant stars★". Monthly Notices of the Royal Astronomical Society. 448 (3): 2749–2765. arXiv:1503.02556. Bibcode:2015MNRAS.448.2749A. doi:10.1093/mnras/stv189. ISSN 1365-2966.
  11. ^ a b 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: V. Southern stars". Astronomy & Astrophysics. 561: A126. arXiv:1312.3474. Bibcode:2014A&A...561A.126D. doi:10.1051/0004-6361/201220762. ISSN 1432-0746.
  12. ^ E-Rara.ch, 2026

Content Disclaimer

Informasi ini disarikan dari Wikipedia dan disajikan kembali untuk tujuan edukasi. Konten tersedia di bawah lisensi CC BY-SA 3.0. Kami tidak bertanggung jawab atas ketidakakuratan data yang bersumber dari kontribusi publik tersebut.

  1. The information displayed on this website is sourced in part or in whole from Wikipedia and has been adapted for the purpose of restating it. We strive to provide accurate and relevant information, however:
  2. There is no guarantee of absolute accuracy. Wikipedia is an open, collaborative project that can be edited by anyone, so information is subject to change.
  3. It is not intended to constitute professional advice. The content displayed is for informational and educational purposes only. For important decisions (e.g., medical, legal, or financial), please consult a professional.
  4. Content copyright. Wikipedia is licensed under the Creative Commons Attribution-ShareAlike License (CC BY-SA). This means that content may be reused with appropriate attribution and shared under a similar license.
  5. Responsible use. Any risk arising from the use of information from this website is entirely the responsibility of the user.