HD 64307

HD 64307

Observation data Epoch J2000.0        Equinox J2000.0 (ICRS)
Constellation	Camelopardalis [1]
Right ascension	08h 00m 11.7385s [2]
Declination	+73° 55′ 04.5036″ [2]
Apparent magnitude  (V)	5.35±0.01 [3]
Characteristics
Evolutionary stage	red giant branch [4]
Spectral type	K3 III [5]
U−B color index	+1.64 [6]
B−V color index	+1.43 [6]
Astrometry
Radial velocity (Rv)	33.54±0.19 [7] km/s
Proper motion (μ)	RA: −8.194 mas/yr [2] Dec.: −37.514 mas/yr [2]
Parallax (π)	4.7407±0.0741  mas [2]
Distance	690 ± 10  ly (211 ± 3  pc)
Absolute magnitude  (MV)	−1.77 [1]
Details
Mass	1.19 [8]   M☉
Radius	49.9 [9]   R☉
Luminosity (bolometric)	892 [10]   L☉
Surface gravity (log g)	1.18 [8]   cgs
Temperature	4,264±122 [11]   K
Metallicity [Fe/H]	−0.1 [12]   dex
Rotational velocity (v sin i)	<2 [13]  km/s
Other designations
AG+74°195, BD+74°338, FK5 300, GC 10745, HD 64307, HIP 39117, HR 3075, SAO 6378
Database references
SIMBAD	data

HD 64307, also known as HR 3075, is a solitary, ^[14] orange hued star located in the northern circumpolar constellation Camelopardalis. It has an apparent magnitude of 5.35, ^[3] 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 ^[2] distant. It appears to be receding from the Sun, having a heliocentric radial velocity of 34  km/s . ^[7]

HD 64307 is an evolved star with a stellar classification of K3 III. ^[5] Gaia DR3 stellar evolution models place it on the red giant branch. ^[4] It has a mass comparable to the Sun ^[8] but due to its evolved state, it has an enlarged radius of 49.9  R_☉. It shines with a bolometric luminosity of 892  L_☉ from its photosphere at an effective temperature of 4,264 K. ^[11] HD 64307 has an iron abundance 80% that of the Sun, and is also lithium enriched. ^[12] Like most giant stars, the object spins slowly, having a projected rotational velocity lower than 2 km/s. ^[13]

References

1. 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. Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics . 649: A1. arXiv: 2012.01533 . Bibcode:2021A&A...649A...1G. doi: 10.1051/0004-6361/202039657 . S2CID   227254300. (Erratum:  doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
3. 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. 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.
5. Roman, Nancy G. (July 1952). "The Spectra of the Bright Stars of Types F5-K5". The Astrophysical Journal. 116: 122. Bibcode:1952ApJ...116..122R. doi: 10.1086/145598 . ISSN   0004-637X.
6. Rybka, E. (1969). "The corrected magnitudes and colours of 278 stars msg ok near SA 1-139 in the UBV system". Acta Astronomica. 19: 229. Bibcode:1969AcA....19..229R. ISSN   0001-5237.
7. 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 & Astrophysics. 430 (1): 165–186. arXiv: astro-ph/0409579 . Bibcode:2005A&A...430..165F. doi: 10.1051/0004-6361:20041272 . ISSN   0004-6361.
8. Anders, F.; et al. (August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy & Astrophysics. 628: A94. arXiv: 1904.11302 . Bibcode:2019A&A...628A..94A. doi: 10.1051/0004-6361/201935765 . ISSN   0004-6361.
9. Kervella, Pierre; Arenou, Frédéric; Thévenin, Frédéric (2022). "Stellar and substellar companions from Gaia EDR3". Astronomy & Astrophysics. 657: A7. arXiv: 2109.10912 . Bibcode:2022A&A...657A...7K. doi: 10.1051/0004-6361/202142146 . eISSN   1432-0746. ISSN   0004-6361.
10. McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (21 November 2012). "Fundamental parameters and infrared excesses of Hipparcos stars: Parameters and IR excesses from Hipparcos". Monthly Notices of the Royal Astronomical Society. 427 (1): 343–357. arXiv: 1208.2037 . Bibcode:2012MNRAS.427..343M. doi: 10.1111/j.1365-2966.2012.21873.x . ISSN   0035-8711.
11. 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. Brown, Jeffery A.; Sneden, Christopher; Lambert, David L.; Dutchover, Edward Jr. (October 1989). "A search for lithium-rich giant stars". The Astrophysical Journal Supplement Series. 71: 293. Bibcode:1989ApJS...71..293B. doi: 10.1086/191375 . eISSN   1538-4365. ISSN   0067-0049.
13. 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.
14. Eggleton, P. P.; Tokovinin, A. A. (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 . S2CID   14878976.