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Eta Canis Minoris

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η Canis Minoris

Location of η Canis Minoris (circled)

Observation data
Epoch J2000.0 Equinox J2000.0 (ICRS)

Constellation

Canis Minor

Right ascension

07^h28^m 02.07527^s^[1]

Declination

+06° 56′ 31.0897″^[1]

Apparent magnitude (V)

5.25^[2] + 11.1^[3]

Characteristics

Spectral type

F0 III^[3]

U−B color index

+0.17^[2]

B−V color index

+0.22^[2]

Astrometry

Radial velocity (R_v)

+17.2^[4] km/s

Proper motion (μ)

RA: −2.955 ± 0.231^[5] mas/yr
Dec.: −43.624 ± 0.197^[5] mas/yr

Parallax (π)

10.2691 ± 0.1452 mas^[5]

Distance

318 ± 4 ly
(97 ± 1 pc)

Absolute magnitude (M_V)

0.1^[6]

Details

η CMi A

Mass

2.16^[4] M_☉

Luminosity

57.5^[4] L_☉

Surface gravity (log g)

3.66^[7] cgs

Temperature

7,505±66^[4] K

Rotational velocity (v sin i)

54^[8] km/s

Age

818^[7] Myr

Other designations

η CMi, 5 CMi, BD+07°1729, GC 9970, HD 58923, HIP 36265, HR 2851, SAO 115477, ADS 6101, CCDM 07280+0657^[9]

Database references

SIMBAD

data

Eta Canis Minoris (η CMi, η Canis Minoris) is a binary star^[3] system in the equatorial constellationofCanis Minor. It is approximately 318 light-years from Earth.

The primary component, η Canis Minoris A, is a yellow-white F-type giant with an apparent magnitude of +5.24. Its companion, η Canis Minoris B, is an eleventh-magnitude star located 4 arcseconds from the primary, though is actually around 440 AU from the main star and takes around 5,000 years to orbit it.^[10]

References[edit]

^ ^a ^b van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID 18759600.

^ ^a ^b ^c Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99): 99, Bibcode:1966CoLPL...4...99J.

^ ^a ^b ^c 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.

^ ^a ^b ^c ^d Luck, R. Earle (September 2015), "Abundances in the Local Region. I. G and K Giants", The Astronomical Journal, 150 (3): 23, arXiv:1507.01466, Bibcode:2015AJ....150...88L, doi:10.1088/0004-6256/150/3/88, S2CID 118505114, 88.

^ ^a ^b ^c 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 sourceatVizieR.

^ Jaschek, C.; Gomez, A. E. (1998), "The absolute magnitude of the early type MK standards from HIPPARCOS parallaxes", Astronomy and Astrophysics, 330 (619–625): 619, Bibcode:1998A&A...330..619J.

^ ^a ^b David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal, 804 (2): 146, arXiv:1501.03154, Bibcode:2015ApJ...804..146D, doi:10.1088/0004-637X/804/2/146, S2CID 33401607.

^ Royer, F.; et al. (October 2002), "Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i", Astronomy and Astrophysics, 393: 897–911, arXiv:astro-ph/0205255, Bibcode:2002A&A...393..897R, doi:10.1051/0004-6361:20020943, S2CID 14070763.

^ "eta CMi". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-08-31.{{cite web}}: CS1 maint: postscript (link)

^ Kaler, Jim, "Eta and Delta-1 CMi", Stars, University of Illinois, retrieved 2017-09-01.