Star profile
Sigma Lupi
Variable starWhat is Sigma Lupi
Sigma Lupi is a variable blue star at 575 light-years, lit on the flank of the southern Wolf, a constellation only properly appreciated from latitudes well south of Europe. Its very faint brightness oscillations are pure stellar seismology: small pulsations that let astronomers read the star's interior as one listens for a heartbeat beneath skin. No human eye will perceive its pulse, but detectors track it, faithful, round after round.
Where it is and when to see it
Sigma Lupi lies in the southern celestial hemisphere. It is visible to the naked eye under a dark sky. Its best month of the year is May: 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.
It opens in your browser. Free, no account, nothing to install.
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
If you don't have an account yet, we'll ask for an email to confirm it's you: we send you a link and that's it, no password.
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 Sigma Lupi
- Constellation
- Lupus
- Apparent magnitude
- 4.44
- Distance
- 575.3 light years
- Coordinates (J2000)
- RA 218.154° · Dec -50.457°
- Catalogue
- HIP 71121 · HD 127381
A symbolic commemorative gift: neither the signature nor the chosen name implies ownership of the star or recognition by the IAU.
Other stars in Lupus
Lupus has 74 stars in Stelvia's catalogue. Here are a few of them.
- Alpha Lupi2.30
- Beta Lupi2.68
- Gamma Lupi2.80
- Tau 2 Lupi4.33
- Omega Lupi4.34
- 2 Lupi4.35
- Phi 2 Lupi4.54
- HIP 763714.55