Its story
21 Her has a visual magnitude of about 5.83: under a reasonably dark sky it is typically reachable with the unaided eye.
Equatorial coordinates for 21 Her: right ascension 16h 24m 11s, declination +6° 56′ 54″ (J2000), in the region of the Serpens constellation (IAU figure Ser).
21 Her. It appears in classical and modern catalogs as HIP 80351, HD 147869, Gaia DR3 4439556480967874432. In the SkyKeepsake Serpens (Ser) browse hub it sits with other stars of the same IAU figure.
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Compose this starFactsHIP 80351
- Right ascension
- 16h 24m 11s
- Declination
- +6° 56′ 54″
- Magnitude
- 5.83
- Distance
- ≈ 352 ly
Data: gaia-dr3