Star profile
Omicron Ophiuchi
What is Omicron Ophiuchi
Omicron Ophiuchi is a visual double 281 light-years away, two stars separated by ten arcseconds that any decent telescope resolves with ease. The primary is an aged yellow giant, twelve times the Sun's radius and seventy-five times its light; the companion, cooler and smaller, glows at roughly half the magnitude. An uneven pair in the Serpent Bearer, drifting toward us at nearly thirty kilometres per second.
Where it is and when to see it
Omicron Ophiuchi lies in the southern celestial hemisphere. It is visible to the naked eye under a dark sky. Its best month of the year is June: the Sun sits at the opposite point of the sky and the star culminates around midnight. How high it climbs above the horizon depends on the latitude you watch from.
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The signature wall
Stelvia's sky works like a signature wall: anyone can leave their name and a message on a real star, and that signature goes up on the map for everyone to read. Signing is free.
A signature without a lock can be replaced by someone else's. The lock makes the signature permanent and lets you choose a symbolic name for the star, always shown next to the star's catalogue identifier. How the lock works
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A public signature from a real person. The chosen name is a symbolic denomination within Stelvia, with no official standing or IAU recognition: the sky is not for sale and belongs to no one.
Astronomical data for Omicron Ophiuchi
- Constellation
- Ophiuchus
- Apparent magnitude
- 5.14
- Distance
- 294.9 light years
- Coordinates (J2000)
- RA 259.503° · Dec -24.287°
- Catalogue
- HIP 84626 · HD 156349
A symbolic commemorative gift: neither the signature nor the chosen name implies ownership of the star or recognition by the IAU.
Other stars in Ophiuchus
Ophiuchus has 88 stars in Stelvia's catalogue. Here are a few of them.
- RasalhagueAlpha Ophiuchi2.08
- SabikEta Ophiuchi2.43
- Zeta Ophiuchi2.54
- HIP 817244.91
- HIP 846715.03
- Guniibuu B5.07
- 23 Ophiuchi5.23
- Tau Ophiuchi5.24