LHS 2520

LHS 2520, also known as Gliese 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,[1] it has a surface temperature of 3024 K.[3] The star was too faint to have had its parallax measured by the Hipparcos satellite. Earth-based measurement gives its parallax as 77.93 ± 2.41 milliarcseconds, yielding a distance of 42 ± 1 light-years.[2]

LHS 2520
Observation data
Epoch J2000      Equinox J2000
Constellation Corvus
Right ascension  12h 10m 05.597s
Declination −15° 04′ 15.66″
Apparent magnitude (V) 12.12
Characteristics
Spectral type M3.5V[1]
Astrometry
Proper motion (μ) RA: −65 mas/yr
Dec.: −710 mas/yr
Parallax (π)77.93 ± 2.41[2] mas
Distance42 ± 1 ly
(12.8 ± 0.4 pc)
Details
Temperature3024[3] K
Other designations
LHS 2520, GJ 3707, LP 734-32.
Database references
SIMBADdata
ARICNSdata

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]

References
  1. 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.
  2. Riedel, Adric R.; Subasavage, John P.; Finch, Charlie T.; Jao, Wei-Chun; Henry, Todd J.; Winters, Jennifer G.; Brown, Misty A.; Ianna, Philip A.; Costa, Edgardo; Mendez, Rene A. (2010). "The Solar Neighborhood. XXII. Parallax Results from the CTIOPI 0.9 m Program: Trigonometric Parallaxes of 64 Nearby Systems with 0farcs5 <=μ<= 1farcs0 yr-1 (SLOWMO Sample)". The Astronomical Journal. 140 (3): 897–911. arXiv:1008.0648. Bibcode:2010AJ....140..897R. doi:10.1088/0004-6256/140/3/897.
  3. 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.
  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.
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