Psi Serpentis (ψ Ser, ψ Serpentis) is a star system in the constellation Serpens. It is approximately 47.8 light years from Earth.
The primary component,
Psi Serpentis A, is a yellow G-type main sequence dwarf with an apparent magnitude of +5.86. It has a close 12th magnitude companion, Psi Serpentis B, 4.2 arcseconds, or at least 60 AUs, distant.
When observed from 1997 through 2000, the primary star appeared to be transitioning from a
maunder minimum state to a state of cycling magnetic activity. [3 ]
References [ edit ]
^ a b c d e 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. Vizier catalog entry
^ Mamajek, Eric E.; Hillenbrand, Lynne A. (November 2008). "Improved Age Estimation for Solar-Type Dwarfs Using Activity-Rotation Diagnostics". The Astrophysical Journal 687 (2): 1264–1293. arXiv: 0807.1686. Bibcode: 2008ApJ...687.1264M. doi: 10.1086/591785.
^ Hall, Jeffrey C.; Lockwood, G. W.; Skiff, Brian A. (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
External links [ edit ]