SS Virginis
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Observational data
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| Epoch: | J2000.0 |
| Constellation: | Virgo |
| Right ascension: | 12h 25m 12s[1] |
| Declination: | 00° 46′ 00″[1] |
| 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[2] 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.[3] 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.[2] 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.[4]
References
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