| Proper Name | None | | Bayer Designation | None | | Flamsteed Number | None | | HR (BSC) | None | | HD | None | | Variable Designation | HO Librae | | Other Designations | Gliese 581, Wolf 562 | | Constellation | Libra | | Right Ascension | 15h 19m 27s | | Declination | -7° 43' 20" | | Distance | 21 light years
6 parsecs | | Magnitude | Apparent: +10.6
Absolute: +11.6 | | Spectral Class | M2.5V red dwarf | | Planets in this system |
Gliese 581 b, gas giant
Gliese 581 c, super Earth
Gliese 581 d, super Earth
Gliese 581 e, super Earth
Gliese 581 f, Earth-mass planet (unconfirmed)
Gliese 581 g (unofficially 'Zarmina'), super Earth (unconfirmed)
| | Optimum Visibility | May / June | | Notes | A small and faint red dwarf star whose brightness changes slightly as it rotates, suggesting patterns or spots on its surface. HO Librae, or Gliese 581, has an extensive planetary system with at least three members, and more potential planets under investigation. These include the remarkably Earth-like Gliese 581 g. |
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