37 Geminorum

37 Geminorum is a solitary[11] Sun-like star located at the northwest part of the northern constellation of Gemini, about three degrees to the east of the bright star Epsilon Geminorum.[12] The apparent visual magnitude of 37 Geminorum is 5.74,[2] which is just bright enough to be visible to the naked eye on a dark night. It is located at a distance of 57 light years from the Sun based on parallax.[1] This star is drifting closer with a radial velocity of −15 km/s, and is predicted to come as near as 13.8 light-years in approximately a million years.[5] It is positioned close enough to the ecliptic to be subject to lunar occultations, such as happened on April 8, 1984.[13]

37 Geminorum
Observation data
Epoch J2000      Equinox J2000
Constellation Gemini
Right ascension 06h 55m 18.66671s[1]
Declination +25° 22′ 32.5038″[1]
Apparent magnitude (V) 5.74[2]
Characteristics
Spectral type G0 V[3]
U−B color index +0.01[4]
B−V color index 0.573±0.010
Astrometry
Radial velocity (Rv)−14.94±0.15[5] km/s
Proper motion (μ) RA: −37.882[1] mas/yr
Dec.: +24.211[1] mas/yr
Parallax (π)57.2425 ± 0.1005[1] mas
Distance57.0 ± 0.1 ly
(17.47 ± 0.03 pc)
Absolute magnitude (MV)4.56[2]
Details
Mass1.146[5] M☉
Radius1.04+0.04
−0.08[1] R☉
Luminosity1.310+0.003
−0.004[1] L☉
Surface gravity (log g)4.29[3] cgs
Temperature6060+235
−118[1] K
Metallicity [Fe/H]−0.25[6] dex
Rotation25.0 d[7]
Rotational velocity (v sin i)1.89[8] km/s
Age5.49[9] Gyr
Other designations
BD+25°1496, GJ 252, HD 50692, HIP 33277, HR 2569, SAO 78866[10]
Database references
SIMBADdata

The stellar classification of 37 Geminorum is G0 V,[3] which indicates it is an ordinary G-type main sequence star that is generating energy through core hydrogen fusion. In 2007, J. C. Hall and associates categorized it as a solar-type with a high mean activity level.[14] The star is around 5.5[9] billion years old and is spinning with a rotation period of 25 days.[7] It is slightly larger and more massive than the Sun,[5][1] with a lower abundance of heavier elements based on its abundance of iron.[6] 37 Geminorum is radiating 1.3 times the luminosity of the Sun from its photosphere at an effective temperature of 6,060 K.[1]

As of 2012, no extrasolar planets or debris disks have yet been discovered around it.[15] The center of the star's habitable zone lies at a distance of 1.32 AU.[16]

Teen Age Message
Main article: Teen Age Message

There was a METI message sent to 37 Geminorum. It was transmitted from Eurasia's largest radar, 70-meter Yevpatoria Planetary Radar. The message was named the Teen Age Message, it was sent on September 3, 2001, and it will arrive at 37 Geminorum in December 2057.[17]

Catalog of Nearby Habitable Systems
Main article: Catalog of Nearby Habitable Systems

The Catalog of Nearby Habitable Systems (HabCat) is a list of approximately 17,000 relatively close stars similar to the sun and considered able to support a planet habitable by humans. 37 Geminorum is on the HabCat list.[18]

See also

References
  1. 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.
  2. 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. S2CID 119257644.
  3. Gray, R.O.; et al. (July 2006). "Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample". The Astronomical Journal. 132 (1): 161–170. arXiv:astro-ph/0603770. Bibcode:2006AJ....132..161G. doi:10.1086/504637.
  4. Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV Data. SIMBAD. Bibcode:1986EgUBV........0M.
  5. Bailer-Jones, C.A.L.; et al. (2018). "New stellar encounters discovered in the second Gaia data release". Astronomy & Astrophysics. 616: A37. arXiv:1805.07581. Bibcode:2018A&A...616A..37B. doi:10.1051/0004-6361/201833456.
  6. Holmberg, J.; et al. (2009). "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics". Astronomy and Astrophysics. 501 (3): 941–947. arXiv:0811.3982. Bibcode:2009A&A...501..941H. doi:10.1051/0004-6361/200811191. See Vizier catalogue V/130.
  7. Judge, P. G.; et al. (March 2020). "Sun-like Stars Shed Light on Solar Climate Forcing". The Astrophysical Journal. 891 (1): 7. arXiv:2002.04633. Bibcode:2020ApJ...891...96J. doi:10.3847/1538-4357/ab72a9. 96.
  8. Martínez-Arnáiz, R.; et al. (September 2010). "Chromospheric activity and rotation of FGK stars in the solar vicinity. An estimation of the radial velocity jitter" (PDF). Astronomy and Astrophysics. 520: A79. arXiv:1002.4391. Bibcode:2010A&A...520A..79M. doi:10.1051/0004-6361/200913725.
  9. Vican, Laura (June 2012). "Age Determination for 346 Nearby Stars in the Herschel DEBRIS Survey". The Astronomical Journal. 143 (6): 135. arXiv:1203.1966. Bibcode:2012AJ....143..135V. doi:10.1088/0004-6256/143/6/135.
  10. "* 37 Gem". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2016-09-12.
  11. Fuhrmann, K.; et al. (February 2017). "Multiplicity among Solar-type Stars". The Astrophysical Journal. 836 (1): 23. Bibcode:2017ApJ...836..139F. doi:10.3847/1538-4357/836/1/139. 139.
  12. Sinnott, Roger W.; Perryman, Michael A. C. (1997). Millennium Star Atlas. 1. Sky Publishing Corporation and the European Space Agency. p. 154. ISBN 0-933346-84-0.
  13. Shaimukhametov, R. R.; Rizvanov, N. G. (September 1998). "Photoelectric Observations of Lunar Occultations at Engelhardt Astronomical Observatory". The Astronomical Journal. 116 (3): 1504–1507. Bibcode:1998AJ....116.1504S. doi:10.1086/300482.
  14. Hall, Jeffrey C.; et al. (March 2007). "The Activity and Variability of the Sun and Sun-like Stars. I. Synoptic Ca II H and K Observations". The Astronomical Journal. 133 (3): 862–881. Bibcode:2007AJ....133..862H. doi:10.1086/510356.
  15. Maldonado, J.; et al. (May 2012). "Metallicity of solar-type stars with debris discs and planets". Astronomy & Astrophysics. 541: A40. arXiv:1202.5884. Bibcode:2012A&A...541A..40M. doi:10.1051/0004-6361/201218800.
  16. See, V.; et al. (October 2014). "The effects of stellar winds on the magnetospheres and potential habitability of exoplanets". Astronomy & Astrophysics. 570: 10. arXiv:1409.1237. Bibcode:2014A&A...570A..99S. doi:10.1051/0004-6361/201424323. A99.
  17. Zaitsev, Alexander (2006). "Messaging to Extra-Terrestrial Intelligence". arXiv:physics/0610031.
  18. Turnbull, Margaret C; Tarter, Jill C (2003). "Target Selection for SETI. I. A Catalog of Nearby Habitable Stellar Systems". The Astrophysical Journal Supplement Series. 145 (1): 181–198. arXiv:astro-ph/0210675. Bibcode:2003ApJS..145..181T. doi:10.1086/345779.
  • "37 Geminorum". SolStation. Archived from the original on 10 December 2005. Retrieved 2005-12-12.
  • HabCat A Catalog of Nearby Habitable Systems
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