Magnitude 5.89 Apparent magnitude (V) 5.89 | ||
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HD 12139 is a double star in the constellation Aries. With an apparent magnitude of 5.89, the stars can be seen by the naked eye under good conditions in rural areas. The system is located approximately 120 parsecs (390 ly) distant, and the brighter star is a red giant, meaning that it has used up its core hydrogen and is expanding.
References
HD 12139 Wikipedia(Text) CC BY-SA