|Right ascension:||12h 25m 12s|
|Declination:||00° 46′ 00″|
|Apparent magnitude:||9.5 to 7.4|
|Absolute magnitude:||(abs mag)|
SS Virginis is a Mira variable star that appears with a strong red hue. It varies in magnitude from a minimum of 9.5 to a maximum of 7.4 over a period of 361 days. It is also considered to be a semiregular variable star, as its minimum and maximum magnitude are themselves variable over a period of decades. Its spectral class is C6.3e. Because it is so rich in carbon, SS Virginis is classified as a carbon star, along with stars like T Geminorum. SS Virginis, like all carbon Mira variables, has a hydrogen-alpha emission line that varies widely, synchronized with the overall variations in light. The hydrogen-alpha emission line becomes far more prominent as the star becomes brighter. Observations made in the near-infrared spectrum indicate that it has a radius of 500 solar radii, and its temperature is between 2405 and 2485 kelvin.
- Levy 2005, p. 66.
- Mikulášek, Z.; Gráf, T. (2005). "Atlas of Hα emission lines and V light curves of 30 carbon Miras". Astronomical Institute of the Slovak Academy of Sciences 35: 83–106. Retrieved 14 July 2012.
- "SS Virginis". American Association of Variable Star Observers. Retrieved 14 July 2012.
- Richichi, A.; Chandrasekhar, T. (1 June 2006). "Near-infrared observations of the carbon stars TU Geminorum and SS Virginis at milliarcsecond resolution". Astronomy and Astrophysics 451 (3): 1041–1044. Bibcode:2006A&A...451.1041R. doi:10.1051/0004-6361:20054669. Retrieved 14 July 2012.