Astronomy:HD 32453
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Caelum[1] |
| Right ascension | 05h 01m 34.5224s[2] |
| Declination | −39° 43′ 04.967″[2] |
| Apparent magnitude (V) | 6.01±0.01[3] |
| Characteristics | |
| Evolutionary stage | red giant branch[2] |
| Spectral type | G8 III[4] |
| B−V color index | +0.88[5] |
| Astrometry | |
| Radial velocity (Rv) | 5.52±0.12[2] km/s |
| Proper motion (μ) | RA: −5.335[2] mas/yr Dec.: +32.895[2] mas/yr |
| Parallax (π) | 8.0408 ± 0.0210[2] mas |
| Distance | 406 ± 1 ly (124.4 ± 0.3 pc) |
| Absolute magnitude (MV) | +0.78[1] |
| Details | |
| Mass | 2.40[6] M☉ |
| Radius | 9.73[7] R☉ |
| Luminosity | 50.1[8] L☉ |
| Surface gravity (log g) | 3.18±0.14[9] cgs |
| Temperature | 5,032±61[8] K |
| Metallicity [Fe/H] | −0.02±0.13[9] dex |
| Rotational velocity (v sin i) | 2±1.4[10] km/s |
| Age | 700[6] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
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 406 light years away based on its parallax shift, but is drifting away at a rate of 5.52 km/s.[2]
This star was designated Epsilon Caeli by Johann Elert Bode in his 1801 Uranographia, but this is now no longer used.[11]
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 times the Sun's mass,[7] but at an age of 700 million years,[6] HD 32453 has expanded to 9.7 times the latter's girth.[7] It radiates at 50 solar luminosities[8] from its enlarged photosphere at an effective temperature of 5,032 K,[8] which gives it a yellow hue. HD 32453 is slightly metal deficient,[9] and spins slowly with a projected rotational velocity of 2 km/s,[10] common for a giant star.
References
- ↑ 1.0 1.1 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A XHIP record for this object at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 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.
- ↑ 3.0 3.1 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.
- ↑ 4.0 4.1 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.
- ↑ 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.
- ↑ 6.0 6.1 6.2 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. doi:10.1086/424966. ISSN 1538-4357. Bibcode: 2004ApJS..155..667D.
- ↑ 7.0 7.1 7.2 Stassun, Keivan G. et al. (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.
- ↑ 8.0 8.1 8.2 8.3 Luck, R. Earle (25 August 2015). "Abundances in the Local Region. I. G and K Giants". The Astronomical Journal 150 (3): 88. doi:10.1088/0004-6256/150/3/88. ISSN 1538-3881. Bibcode: 2015AJ....150...88L.
- ↑ 9.0 9.1 9.2 Alves, S.; Benamati, L.; Santos, N. C.; Adibekyan, V. Zh.; Sousa, S. G.; Israelian, G.; De Medeiros, J. R.; Lovis, C. et al. (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. doi:10.1093/mnras/stv189. ISSN 1365-2966. Bibcode: 2015MNRAS.448.2749A.
- ↑ 10.0 10.1 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: V. Southern stars". Astronomy & Astrophysics 561: A126. doi:10.1051/0004-6361/201220762. ISSN 1432-0746. Bibcode: 2014A&A...561A.126D.
- ↑ E-Rara.ch, 2026, https://www.e-rara.ch/zut/content/zoom/3341806
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