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Omicron Leonis (ο Leo, ο Leonis), known also by its traditional name, Subra, is a binary star in the constellation of Leo, west of Regulus, some 130 light years from here, where it marks one of the lion's forepaws.

The two stars of Omicron Leonis (Subra-A and Subra-B) are given variably as type F9III giant for the primary and A5mV dwarf for the secondary and subsequently as an F6II bright giant with a companion A7V dwarf star according to Kaler and others. Their combined apparent magnitude is +3.53.

References

  • in Kaler Stars
  • Relates to the A star, Subra-B
  • brief data.