Star catalogue
Search 2.5 million stars by name or catalogue number
Apphemeride includes 9,110 bright stars with detailed profiles and lets you search around 2.5 million stars in the Tycho-2 catalogue.
- Where is HIP 32349?
- Which star is HD 48915?
- How far away is Vega?
- What are Betelgeuse’s colour and spectral class?
Search the way astronomers do
Find stars by proper name or HR, HIP, HD and TYC number.
Star profiles
Explore brightness, B−V, U−B and R−I colour indices, parallax, proper motion, radial and rotational velocity, spectral class and galactic coordinates.
Put a star on the map
Show a star on the Sky Map, in Space or on the Earth map, with rise and set times for your location.
| BSC5 | 9,110 stars |
|---|---|
| Tycho-2 | around 2.5 million |
| Identifiers | HR, HIP, HD, TYC |
Star pages are part of the full version.
Frequently asked questions
What is Tycho-2?
A star catalogue based on measurements by the Tycho instrument aboard ESA’s Hipparcos satellite. It contains around 2.5 million stars and is nearly complete to about magnitude 11.
Can I search by HD number?
Yes, as well as HIP, HR and TYC numbers.
Does the catalogue contain every star?
No catalogue contains every star. Apphemeride includes the bright-star catalogue and Tycho-2.
Learn more in the guides
Download Apphemeride
Free to download. The Sun and Moon are always free. Unlock the remaining features with the full version: a one-time purchase after a three-day trial, with no subscription.
