HD 27022

Last updated
HD 27022
Camelopardalis constellation map.svg
Red circle.svg
Location of HD 27022 on the map (circled)
Observation data
Epoch J2000.0        Equinox J2000.0 (ICRS)
Constellation Camelopardalis
Right ascension 04h 20m 40.32564s [1]
Declination +65° 08′ 25.5893″ [1]
Apparent magnitude  (V)+5.27 [2]
Characteristics
Spectral type G4 III [3] or G5 IIb [4]
U−B color index +0.47 [2]
B−V color index +0.81 [2]
Astrometry
Radial velocity (Rv)−19.47±0.21 [5]  km/s
Proper motion (μ)RA: −28.439  mas/yr [1]
Dec.: −4.4856  mas/yr [1]
Parallax (π)9.4068 ± 0.0643  mas [1]
Distance 347 ± 2  ly
(106.3 ± 0.7  pc)
Absolute magnitude  (MV)+0.31 [6]
Details
Mass 2.88 [7]   M☉
Radius 10.71+0.23
−1.06 [8]   R☉
Luminosity 75.9 [9]   L☉
Surface gravity (log g)3.10±0.21 [10]   cgs
Temperature 5,425±33 [11]   K
Metallicity [Fe/H]0.03±0.05 [10]   dex
Rotational velocity (v sin i)0.5±1.4 [12]  km/s
Age 444±60 [7]   Myr
Other designations
20 H. Camelopardalis, [13] AG+65°247, BD+64°433, FK5  2315, GC  5199, HD  27022, HIP  20266, HR  1327, SAO  13098 [14]
Database references
SIMBAD data

HD 27022, also known as HR 1327, is a star located in the northern circumpolar constellation Camelopardalis. The object has also been designated as 20 H. Camelopardalis, but is not commonly used in modern times. It has an apparent magnitude of 5.27, [2] allowing it to be faintly visible to the naked eye. Based on parallax measurements from Gaia DR3, the star has been estimated to be 347 light years away. [1] It appears to be approaching the Solar System, having a heliocentric radial velocity of −19.5  km/s . [5]

This is a solitary, [15] yellow giant with a stellar classification of G4 III. [3] It has alternatively been classified as G5 IIb wk, [4] indicating a bright giant with weak lines. HD 27022 is currently on the horizontal branch located on the warm end of the red clump, [16] a region of the said branch filled with metal-rich giant stars. It has 2.88 times the mass of the Sun but at the age of 444 million years, [7] it has expanded to 10.71 times its girth. [8] It radiates 75.9 times the luminosity of the Sun [9] from its enlarged photosphere at an effective temperature of 5,425  K . [11] Like most giants, it spins rather slowly, having a projected rotational velocity of 1⁄2 km/s. [12] Kinematically, it belongs to the halo of the Ursa Major moving group. [17]

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<span class="mw-page-title-main">2 Piscis Austrini</span> Star in the constellation Microscopium

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<span class="mw-page-title-main">HD 26764</span> Star in the constellation Camelopardalis

HD 26764, also known as HR 1314 or rarely 14 H. Camelopardalis, is a solitary white hued star located in the northern circumpolar constellation Camelopardalis. It has an apparent magnitude of 5.19, making it faintly to the naked eye if viewed under good conditions. Gaia DR3 parallax measurements place the object at a distance of 266 light years and is drifting closer with a poorly constrained heliocentric radial velocity of 3 km/s. At its current distance, HD 26764's brightness is diminished by 0.26 magnitudes due to interstellar dust.

HD 64307, also known as HR 3075, is a solitary, orange hued star located in the northern circumpolar constellation Camelopardalis. It has an apparent magnitude of 5.35, allowing it to be faintly seen with the naked eye. Based on parallax measurements from the Gaia spacecraft, The object is estimated to be 690 light years distant. It appears to be receding from the Sun, having a heliocentric radial velocity of 34 km/s.

HD 68375 is a solitary star in the northern circumpolar constellation Camelopardalis. It is faintly visible to the naked eye with an apparent magnitude of 5.54 and is estimated to be 289 light years distant. However, it is receding with a heliocentric radial velocity of 4.33 km/s.

HD 193373 is a solitary red hued star located in the equatorial constellation Delphinus. It has an apparent magnitude of 6.21, placing it near the limit for naked eye visibility. Parallax measurements place it 846 light years distant and it is currently receding with a heliocentric radial velocity of 22.7 km/s.

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HD 58425, also known as HR 2830, is an astrometric binary 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. Based on parallax measurements from Gaia DR3, the system is estimated to be 470 light years away from Earth. It appears to be rapidly receding from the Sun, having a heliocentric radial velocity of 58.6 km/s. HD 58425 is listed as 54 Ursae Majoris in Johann Hevelius' catalogue, but this was dropped after the official IAU's official constellation borders were drawn.

HD 26670, also known as HR 1305, is a star located in the northern circumpolar constellation of Camelopardalis, the giraffe. The object has been designated as 26 H. Camelopardalis, but is not commonly used in modern times. It has an apparent magnitude of 5.70, allowing it to be faintly visible to the naked eye. Based on parallax measurements from Gaia DR3, the object is estimated to be 491 light years away from the Solar System. It appears to be slowly receding with a heliocentric radial velocity of 0.4 km/s.

HD 50885, also known as HR 2581, is a star located in the northern circumpolar constellation Camelopardalis, the giraffe. It has an apparent magnitude of 5.69, making it faintly visible to the naked eye if viewed under ideal conditions. Based on parallax measurements from Gaia DR3, the object is estimated to be 513 light years distant. It appears to be approaching the Solar System with a heliocentric radial velocity of −17.8 km/s.

<span class="mw-page-title-main">HD 106248</span> Star in the constellation Chamaeleon

HD 106248, also known as HR 4649, is a solitary, orange hued star located in the southern circumpolar constellation Chamaeleon. It has an apparent magnitude of 6.34, placing it near the limit for naked eye visibility. Based on parallax measurements from Gaia DR3, the object is estimated to be 358 light years away from the Solar System. It appears to be receding with a heliocentric radial velocity of 34.5 km/s. At its current distance, HD 106248's brightness is diminished by 0.32 due to interstellar dust and Eggen (1993) lists it as a member of the old (thick) disk population.

<span class="mw-page-title-main">8 Leonis Minoris</span> Star in the constellation of Leo Minor

8 Leonis Minoris is a solitary, red hued star located in the northern constellation Leo Minor. It has an apparent magnitude 5.37, making it faintly visible to the naked eye. Based on parallax measurements from the Gaia satellite, the object is estimated to be 492 light years distant. It is receding with a heliocentric radial velocity of 40 km/s. At its current distance, 8 LMi is diminshed by 0.12 magnitudes due to interstellar dust.

<span class="mw-page-title-main">HD 22764</span> Double star; Camelopardalis

HD 22764, also known as HR 1112, is an orange hued star located in the northern circumpolar constellation Camelopardalis. It has an apparent magnitude of 5.78, allowing it to be faintly visible to the naked eye. The object is located relatively far at a distance of approximately 1,770 light years based on Gaia DR3 parallax measurements but is approaching the Solar System with a heliocentric radial velocity of −12.5 km/s. At its current distance, HD 22764's brightness is diminished by 0.66 magnitudes due to interstellar dust.

<span class="mw-page-title-main">HD 117566</span> High proper motion star; Camelopardalis

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">51 Camelopardalis</span> K-type giant in the constellation Camelopardalis

51 Camelopardalis, also designated as HD 62066, is a solitary star located in the northern circumpolar constellation Camelopardalis. It is faintly visible to the naked eye as an orange-hued point of light with an apparent magnitude of 5.93. Gaia DR3 parallax measurements imply a distance of 334 light-years and it is currently receding with a heliocentric radial velocity of −30.9 km/s. At its current distance, 51 Cam's brightness is diminished by 0.17 magnitudes due to interstellar extinction and it has an absolute magnitude of +0.92.

References

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  2. 1 2 3 4 Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". VizieR Online Data Catalog. Bibcode:2002yCat.2237....0D.
  3. 1 2 Keenan, Philip C.; McNeil, Raymond C. (October 1989). "The Perkins Catalog of Revised MK Types for the Cooler Stars". The Astrophysical Journal Supplement Series. 71: 245. Bibcode:1989ApJS...71..245K. doi: 10.1086/191373 . ISSN   0067-0049.
  4. 1 2 Keenan, P. C.; Pitts, R. E. (April 1980). "Revised MK spectral types for G, K ANS M stars". The Astrophysical Journal Supplement Series. 42: 541–563. Bibcode:1980ApJS...42..541K. doi: 10.1086/190662 . ISSN   0067-0049.
  5. 1 2 Soubiran, C.; Bienaymé, O.; Mishenina, T. V.; Kovtyukh, V. V. (9 January 2008). "Vertical distribution of Galactic disk stars". Astronomy & Astrophysics. 480 (1): 91–101. arXiv: 0712.1370 . Bibcode:2008A&A...480...91S. doi: 10.1051/0004-6361:20078788 . eISSN   1432-0746. ISSN   0004-6361.
  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. 1 2 3 Feltzing, S.; Holmberg, J.; Hurley, J. R. (October 2001). "The solar neighbourhood age-metallicity relation - Does it exist?". Astronomy & Astrophysics. 377 (3): 911–924. arXiv: astro-ph/0108191 . Bibcode:2001A&A...377..911F. doi: 10.1051/0004-6361:20011119 . eISSN   1432-0746. ISSN   0004-6361.
  8. 1 2 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.
  9. 1 2 Luck, R. Earle (September 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   0004-6256.
  10. 1 2 da Silva, Ronaldo; Milone, André de C.; Rocha-Pinto, Helio J. (August 2015). "Homogeneous abundance analysis of FGK dwarf, subgiant, and giant stars with and without giant planets". Astronomy and Astrophysics. 580: A24. arXiv: 1505.01726 . Bibcode:2015A&A...580A..24D. doi: 10.1051/0004-6361/201525770 . ISSN   0004-6361.
  11. 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.
  12. 1 2 Gray, David F.; Toner, C. G. (November 1986). "Rotation and macroturbulence in bright giants". The Astrophysical Journal. 310: 277. Bibcode:1986ApJ...310..277G. doi: 10.1086/164681 . eISSN   1538-4357. ISSN   0004-637X.
  13. ↑ 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.
  14. ↑ "HD 27022". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 22 September 2022.
  15. ↑ 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.
  16. ↑ Alves, David R. (20 August 2000). "K‐Band Calibration of the Red Clump Luminosity". The Astrophysical Journal. 539 (2): 732–741. arXiv: astro-ph/0003329 . Bibcode:2000ApJ...539..732A. doi: 10.1086/309278 . eISSN   1538-4357. ISSN   0004-637X.
  17. ↑ Chupina, N. V.; Reva, V. G.; Vereshchagin, S. V. (4 May 2006). "Kinematic structure of the corona of the Ursa Major flow found using proper motions and radial velocities of single stars". Astronomy & Astrophysics. 451 (3): 909–916. Bibcode:2006A&A...451..909C. doi: 10.1051/0004-6361:20054009 . eISSN   1432-0746. ISSN   0004-6361.
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