Star profile
23 Ursae Majoris
What is 23 Ursae Majoris
23 Ursae Majoris glows in the Great Bear as a yellow-white F-type subgiant some 78 light-years away. Nearly twice as massive as the Sun and fifteen times more luminous, it heads a multiple system —a ninth-magnitude companion orbits at 22 arcseconds, within reach of a modest telescope. The light arriving tonight set out shortly after the first transatlantic radio broadcast.
Where it is and when to see it
23 Ursae Majoris lies in the northern celestial hemisphere. It is visible to the naked eye under a dark sky. Its best month of the year is January: 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 23 Ursae Majoris
- Constellation
- Ursa Major
- Apparent magnitude
- 3.65
- Distance
- 77.7 light years
- Coordinates (J2000)
- RA 142.882° · Dec 63.062°
- Catalogue
- HIP 46733 · HD 81937
A symbolic commemorative gift: neither the signature nor the chosen name implies ownership of the star or recognition by the IAU.
Other stars in Ursa Major
Ursa Major has 124 stars in Stelvia's catalogue. Here are a few of them.
- AliothEpsilon Ursae Majoris1.76
- DubheAlpha Ursae Majoris1.81
- AlkaidEta Ursae Majoris1.85
- Tania BorealisLambda Ursae Majoris3.45
- Alula BorealisNu Ursae Majoris3.49
- AlkaphrahKappa Ursae Majoris3.57
- TaiyangshouChi Ursae Majoris3.69
- Upsilon Ursae Majoris3.78