LHS 2520
Observation data
Epoch J2000      Equinox J2000
Constellation Corvus
Right ascension 12h 10m 05.60124s[1]
Declination −15° 04 16.9613[1]
Apparent magnitude (V) 12.12
Characteristics
Spectral type M3.5V[2]
Astrometry
Radial velocity (Rv)80.47±0.26[1] km/s
Proper motion (μ) RA: −56.437 mas/yr[1]
Dec.: −712.957 mas/yr[1]
Parallax (π)81.5703 ± 0.0354 mas[1]
Distance39.98 ± 0.02 ly
(12.259 ± 0.005 pc)
Details
Temperature3024[3] K
Other designations
LHS 2520, GJ 3707, LP 734-32
Database references
SIMBADdata
ARICNSdata

LHS 2520, also known as GJ 3707, is a red dwarf star in the constellation Corvus. With an apparent magnitude of 12.12, it is too faint to be seen with the unaided eye. A cool star of spectral type M3.5V,[2] it has a surface temperature of 3024 K.[3] The star was too faint to have had its parallax measured by the Hipparcos satellite. Measurement by Gaia gives its parallax as 81.57±0.04 milliarcseconds, yielding a distance of 40 light-years (12 parsecs).[1]

In Action Comics #14 (January 2013), which was published 7 November 2012, Neil Degrasse Tyson appears in the story, in which he determines that Superman's home planet, Krypton, orbited LHS 2520. Tyson assisted DC Comics in selecting a real-life star that would be an appropriate parent star to Krypton, and picked the star in Corvus,[4][5] and which is the mascot of Superman's high school, the Smallville Crows.[6]

The star also appears as LP 734-32 in the 2014 game, Elite Dangerous.[7]

References

  1. 1 2 3 4 5 6 7 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.
  2. 1 2 Jenkins, J. S.; Ramsey, L. W.; Jones, H. R. A.; Pavlenko, Y.; Gallardo, J.; Barnes, J. R.; Pinfield, D. J. (2009). "Rotational Velocities for M Dwarfs". The Astrophysical Journal. 704 (2): 975–88. arXiv:0908.4092. Bibcode:2009ApJ...704..975J. doi:10.1088/0004-637X/704/2/975. S2CID 119203469.
  3. 1 2 Casagrande, Luca; Flynn, Chris; Bessell, Michael (2008). "M dwarfs: effective temperatures, radii and metallicities". Monthly Notices of the Royal Astronomical Society. 389 (2): 585–607. arXiv:0806.2471. Bibcode:2008MNRAS.389..585C. doi:10.1111/j.1365-2966.2008.13573.x. S2CID 14353142.
  4. Wall, Mike (7 November 2012). "Superman's Home Planet Krypton 'Found'". Scientific American.
  5. Potter, Ned (5 November 2012). "Superman Home: Planet Krypton 'Found' in Sky". abc news website. ABC News Internet Ventures. Retrieved 31 October 2014.
  6. Gregorian, Dareh (5 November 2012). "NYER is 'super' smart". New York Post. Retrieved 31 October 2014.
  7. u/Mark0sky (8 September 2014). "Soon we should be able to visit Superman home system. Here it is on the Galaxy Map".{{cite web}}: CS1 maint: numeric names: authors list (link)
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