Star profile
HIP 21823
What is HIP 21823
In Perseus, the hero who bore Medusa’s head across the Greek sky, shines a white star whose light crossed two hundred and ninety-six years before arriving. It set out as Bach had just finished his cello suites in Köthen. Hotter and more luminous than the Sun, its surface near nine thousand degrees lends it a serene ivory tone, clean as freshly fallen snow. It is a discreet companion to the great winter figures of the north, awaiting its turn in silence.
Where it is and when to see it
HIP 21823 lies in the northern celestial hemisphere. It is visible to the naked eye under a dark sky. Its best month of the year is December: 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 HIP 21823
- Constellation
- Perseus
- Apparent magnitude
- 5.66
- Distance
- 296.5 light years
- Coordinates (J2000)
- RA 70.350° · Dec 48.301°
- Catalogue
- HIP 21823 · HD 29526
A symbolic commemorative gift: neither the signature nor the chosen name implies ownership of the star or recognition by the IAU.
Other stars in Perseus
Perseus has 99 stars in Stelvia's catalogue. Here are a few of them.
- MirfakAlpha Persei1.79
- AlgolBeta Persei2.09
- Zeta Persei2.84
- HIP 174605.60
- HIP 179325.65
- HIP 175845.66
- HIP 99905.66
- 2 Persei5.70