HD 25274

Last updated
HD 25274
Camelopardalis constellation map.svg
Red circle.svg
Location of HD 25274 on the map (circled)
Observation data
Epoch J2000.0        Equinox J2000.0 (ICRS)
Constellation Camelopardalis
Right ascension 04h 06m 03.18286s [1]
Declination +68° 40′ 47.8990″ [1]
Apparent magnitude  (V)5.86±0.01 [2]
Characteristics
Spectral type M0 III [3]
B−V color index +1.54 [4]
Astrometry
Radial velocity (Rv)−48.23±0.26 [5]  km/s
Proper motion (μ)RA: +7.555  mas/yr [1]
Dec.: +2.938  mas/yr [1]
Parallax (π)5.4653 ± 0.0455  mas [1]
Distance 597 ± 5  ly
(183 ± 2  pc)
Absolute magnitude  (MV)−0.51 [6]
Details
Radius 59.8+1.6
−1.5 [7] or 39.6+1.2
−5.9 [1]   R☉
Luminosity 762+26
−22 [1]   L☉
Surface gravity (log g)1.22 [8]   cgs
Temperature 3,985±122 [9]   K
Metallicity [Fe/H]−0.21±0.09 [10]   dex
Rotational velocity (v sin i)2.2±1.2 [11]  km/s
Other designations
AG+68°213, BD+68°303, FK5  2291, GC  4874, HD  25274, HIP  19129, HR  1241, SAO  13006 [12]
Database references
SIMBAD data

HD 25274, also known as HR 1241, is a solitary star [13] located in the northern circumpolar constellation Camelopardalis. It is faintly visible to the naked eye as a red hued point of light with an apparent magnitude of 5.86. [2] Gaia DR3 parallax measurements imply a distance of 597 light-years and it is currently drifting closer with a heliocentric radial velocity of −48.23  km/s . [5] At its current distance, HD 25274's brightness is diminished by three-tenths of a magnitude due to interstellar extinction [14] and it has an absolute magnitude of −0.51. [6]

HD 25274 has a stellar classification of M0 III, [3] indicating that it is an evolved red giant. However, the Bright Star Catalog gives a hotter classification of K2 III. [15] The spectrophotometry-measured angular diameter, after correcting for limb darkening, is 2.02±0.03  mas . [16] At the estimated distance for HD 25274, this yields a physical radius 39.8 times that of the Sun. [17] It also has an empirical radius of 48.1  R☉ [7] and Gaia DR3 models a larger radius. [1] The object radiates 762 times the luminosity of the Sun [1] from its enlarged photosphere at an effective temperature of 3,985  K . [9] HD 25274 is metal deficient with an iron abundance 62% that of the Sun's ([Fe/H] = −0.21) [10] and it spins modestly with a projected rotational velocity of 2.2  km/s . [11] HD 25274 is a field star of the HIP 21974 cluster. [18]

Related Research Articles

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<span class="mw-page-title-main">HD 198716</span> Star in the constellation of Microscopium

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<span class="mw-page-title-main">HD 36187</span> Star in the constellation of Columba

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HD 117566, also known as HR 5091, is a solitary yellow-hued star located in the northern circumpolar constellation Camelopardalis. It has an apparent magnitude of 5.74, making it faintly visible to the naked eye. This object is relatively close at a distance of 291 light years based on Gaia DR3 parallax measurements but is receding with a heliocentric radial velocity of 14 km/s. At its current distance, HD 117566's brightness is diminished by 0.12 magnitudes due to interstellar dust.

<span class="mw-page-title-main">HD 168592</span> Star in the constellation of Corona Australis

HD 168592, also designated as HR 6862 or rarely 7 G. Coronae Australis, is a solitary star located in the southern constellation Corona Australis. It is faintly visible to the naked eye as an orange-hued star with an apparent magnitude of 5.07. Gaia DR3 parallax measurements place it at a distance of 490 light years and is currently receding with a heliocentric radial velocity of 18 km/s. At its current distance, HD 168592's brightness is diminished by 0.38 magnitudes due to interstellar dust. It has an absolute magnitude of −0.76.

<span class="mw-page-title-main">HD 23005</span> Star in Camelopardlis

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<span class="mw-page-title-main">HD 170521</span> Distant K-type giant; Corona Australis

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References

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  2. 1 2 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. S2CID   17128864.
  3. 1 2 Wilson, Ralph E.; Joy, Alfred H. (March 1950). "Radial Velocities of 2111 Stars". The Astrophysical Journal. 111: 221. Bibcode:1950ApJ...111..221W. doi: 10.1086/145261 . eISSN   1538-4357. ISSN   0004-637X. S2CID   122883647.
  4. ↑ Haggkvist, L.; Oja, T. (1970). "Results of BV photometry 1969-70 (Uppsala refractor)". Private Communication. Bibcode:1970Priv.........0H. S2CID   231475662.
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  6. 1 2 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.
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  8. ↑ McDonald, I.; Zijlstra, A. A.; Watson, R. A. (15 June 2017). "Fundamental parameters and infrared excesses of Tycho–Gaia stars". Monthly Notices of the Royal Astronomical Society. 471 (1): 770–791. arXiv: 1706.02208 . Bibcode:2017MNRAS.471..770M. doi: 10.1093/mnras/stx1433 . eISSN   1365-2966. ISSN   0035-8711. S2CID   73594365.
  9. 1 2 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. hdl: 1721.1/124721 . S2CID   166227927.
  10. 1 2 Taylor, B. J. (February 1999). "Catalogs of temperatures and [Fe/H] averages for evolved G and K stars". Astronomy and Astrophysics Supplement. 134 (3): 523–524. Bibcode:1999A&AS..134..523T. doi: 10.1051/aas:1999153 .
  11. 1 2 de Medeiros, J. R.; Mayor, M. (November 1999). "A catalog of rotational and radial velocities for evolved stars". Astronomy and Astrophysics Supplement Series. 139 (3): 433–460. Bibcode:1999A&AS..139..433D. doi: 10.1051/aas:1999401 . ISSN   0365-0138. S2CID   54046583.
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  13. ↑ 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. S2CID   14878976.
  14. ↑ Gontcharov, George A.; Mosenkov, Aleksandr V. (28 September 2017). "Verifying reddening and extinction for Gaia DR1 TGAS main sequence stars". Monthly Notices of the Royal Astronomical Society. 472 (4): 3805–3820. arXiv: 1709.01160 . Bibcode:2017MNRAS.472.3805G. doi: 10.1093/mnras/stx2219 . eISSN   1365-2966. ISSN   0035-8711. S2CID   118879856.
  15. ↑ Hoffleit, Dorrit; Jaschek, Carlos (1991). The Bright star catalogue. Bibcode:1991bsc..book.....H.
  16. ↑ Richichi, A.; Percheron, I.; Khristoforova, M. (February 2005). "CHARM2: An updated Catalog of High Angular Resolution Measurements". Astronomy & Astrophysics. 431 (2): 773–777. Bibcode:2005A&A...431..773R. doi: 10.1051/0004-6361:20042039 . eISSN   1432-0746. ISSN   0004-6361. S2CID   122267643.
  17. ↑ Lang, Kenneth R. (2006). Astrophysical formulae. Astronomy and astrophysics library. Vol. 1 (3rd ed.). Birkhäuser. ISBN   3-540-29692-1. The radius (R*) is given by:
  18. ↑ Cantat-Gaudin, T.; Jordi, C.; Vallenari, A.; Bragaglia, A.; Balaguer-Núñez, L.; Soubiran, C.; Bossini, D.; Moitinho, A.; Castro-Ginard, A.; Krone-Martins, A.; Casamiquela, L.; Sordo, R.; Carrera, R. (October 2018). "A Gaia DR2 view of the open cluster population in the Milky Way". Astronomy & Astrophysics. 618: A93. arXiv: 1805.08726 . Bibcode:2018A&A...618A..93C. doi: 10.1051/0004-6361/201833476 . ISSN   0004-6361.
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