Star profile
25 Herculis
What is 25 Herculis
25 Herculis is a white A-type star 243 light-years away, within the vast figure of Hercules that fills an entire quadrant of the northern summer sky. Its atmosphere, close to ten thousand degrees, emits a clean, steady white light, without the golden warmth of cooler stars. Hercules also hosts the globular cluster M13, one of the oldest objects visible from the north, though it lies elsewhere in the constellation.
Where it is and when to see it
25 Herculis lies in the northern 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 25 Herculis
- Constellation
- Hercules
- Apparent magnitude
- 5.53
- Distance
- 242.9 light years
- Coordinates (J2000)
- RA 246.351° · Dec 37.394°
- Catalogue
- HIP 80460 · HD 148283
A symbolic commemorative gift: neither the signature nor the chosen name implies ownership of the star or recognition by the IAU.
Other stars in Hercules
Hercules has 136 stars in Stelvia's catalogue. Here are a few of them.
- KornephorosBeta Herculis2.78
- RasalgethiAlpha 1 Herculis2.78
- Zeta Herculis2.81
- 74 Herculis5.51
- HIP 873085.51
- HIP 853855.52
- HIP 866235.54
- HIP 849495.55