How to see it
21 Eri has a visual magnitude of about 5.71: under a reasonably dark sky it is typically reachable with the unaided eye.
Sky position
Equatorial coordinates for 21 Eri: right ascension 3h 39m 1s, declination −5° 37′ 38″ (J2000), in the region of the Eridanus constellation (IAU figure Eri).
Catalog context
21 Eri. It appears in classical and modern catalogs as HIP 17027, HD 22713, Gaia DR3 3247680138377334912. In the SkyKeepsake Eridanus (Eri) browse hub it sits with other stars of the same IAU figure.
Catalog identifiers
- Gaia
- Gaia DR3 3247680138377334912
- HIP
- 17027
- HD
- 22713
- gaia_dr3
- 3247680138377334912
- Bayer / Flamsteed
- 21 Eri
Observed properties
- Visual magnitude
- 5.71