HD 58425, also known as HR 2830, is an astrometric binary[13] (100% chance[14]) located in the northern circumpolar constellation Camelopardalis. It is faintly visible to the naked eye as an orang point of light at an apparent magnitude of 5.64.[2] Based on parallax measurements from Gaia DR3, the system is estimated to be 470 light years away from Earth.[1] It appears to be rapidly receding from the Sun, having a heliocentric radial velocity of 58.6 km/s.[5] HD 58425 is listed as 54 Ursae Majoris in Johann Hevelius' catalogue,[11] but this was dropped after the official IAU's official constellation borders were drawn.
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Camelopardalis |
| Right ascension | 07h 30m 52.66467s[1] |
| Declination | +68° 27′ 56.3270″[1] |
| Apparent magnitude (V) | 5.64±0.01[2] |
| Characteristics | |
| Evolutionary stage | red giant branch[1] |
| Spectral type | K2 III[3] |
| B−V color index | +1.11[4] |
| Astrometry | |
| Radial velocity (Rv) | 58.6±0.2[5] km/s |
| Proper motion (μ) | RA: −2.031 mas/yr[1] Dec.: −42.687 mas/yr[1] |
| Parallax (π) | 6.9858 ± 0.2644 mas[1] |
| Distance | 470 ± 20 ly (143 ± 5 pc) |
| Absolute magnitude (MV) | −0.05[6] |
| Details | |
| Mass | 1.74±0.52[7] M☉ |
| Radius | 24.7[8] R☉ |
| Luminosity | 199+24 −22[9] L☉ |
| Surface gravity (log g) | 2.4±0.1[10] cgs |
| Temperature | 4,479±62[8] K |
| Metallicity [Fe/H] | −0.42±0.04[10] dex |
| Age | 3.55+0.52 −0.46[7] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
The visible component is an evolved, RGB star with a stellar classification of K2 III.[3] It has 1.74 times the mass of the Sun and is said to be 3.55 billion years old.[7] At this age, the object has expanded to 24.7 times the radius of the Sun[8] and now radiates nearly 200 times the luminosity of the Sun[9] from its enlarged photosphere at an effective temperature of 4,479 K.[8] HD 58425 A has an iron abundance only 38% that of the Sun's,[10] making it metal deficient.
References
edit- ^ a b c d e f 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.
- ^ 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.
- ^ a b Adams, Walter S.; Joy, Alfred H.; Humason, Milton L.; Brayton, Ada Margaret (April 1935). "The Spectroscopic Absolute Magnitudes and Parallaxes of 4179 Stars". The Astrophysical Journal. 81: 187. Bibcode:1935ApJ....81..187A. doi:10.1086/143628. eISSN 1538-4357. ISSN 0004-637X.
- ^ Haggkvist, L.; Oja, T. (1970). "Results of BV photometry 1969-70 (Uppsala refractor)". Private Communication. Bibcode:1970Priv.........0H.
- ^ a b Famaey, B.; Jorissen, A.; Luri, X.; Mayor, M.; Udry, S.; Dejonghe, H.; Turon, C. (January 2005). "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters". Astronomy and Astrophysics. 430: 165. arXiv:astro-ph/0409579. Bibcode:2005A&A...430..165F. doi:10.1051/0004-6361:20041272. S2CID 17804304.
- ^ 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.
- ^ a b c Feuillet, Diane K.; Bovy, Jo; Holtzman, Jon; Girardi, Léo; MacDonald, Nick; Majewski, Steven R.; Nidever, David L. (20 January 2016). "Determining Ages of APOGEE Giants with Known Distances". The Astrophysical Journal. 817 (1): 40. arXiv:1511.04088. Bibcode:2016ApJ...817...40F. doi:10.3847/0004-637X/817/1/40. eISSN 1538-4357.
- ^ 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.
- ^ a b Charbonnel, C.; Lagarde, N.; Jasniewicz, G.; North, P. L.; Shetrone, M.; Krugler Hollek, J.; Smith, V. V.; Smiljanic, R.; Palacios, A.; Ottoni, G. (January 2020). "Lithium in red giant stars: Constraining non-standard mixing with large surveys in the Gaia era". Astronomy & Astrophysics. 633: A34. arXiv:1910.12732. Bibcode:2020A&A...633A..34C. doi:10.1051/0004-6361/201936360. eISSN 1432-0746. ISSN 0004-6361.
- ^ a b c Sprague, Dani; et al. (8 March 2022). "APOGEE Net: An Expanded Spectral Model of Both Low-mass and High-mass Stars". The Astronomical Journal. 163 (4): 152. arXiv:2201.03661. Bibcode:2022AJ....163..152S. doi:10.3847/1538-3881/ac4de7. eISSN 1538-3881. ISSN 0004-6256.
- ^ a b Verbunt, F.; van Gent, R. H. (June 2010). "The star catalogue of Hevelius". Astronomy and Astrophysics. 516: A29. Bibcode:2010A&A...516A..29V. doi:10.1051/0004-6361/201014003. eISSN 1432-0746. ISSN 0004-6361.
- ^ "HD 58425". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 21 September 2022.
- ^ 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. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x. eISSN 1365-2966. ISSN 0035-8711.
- ^ Frankowski, A.; Jancart, S.; Jorissen, A. (19 December 2006). "Proper-motion binaries in the Hipparcos catalogue". Astronomy & Astrophysics. 464 (1): 377–392. arXiv:astro-ph/0612449. Bibcode:2007A&A...464..377F. doi:10.1051/0004-6361:20065526. eISSN 1432-0746. ISSN 0004-6361.