Its story
21 Sgr has a visual magnitude of about 4.34: under a reasonably dark sky it is typically reachable with the unaided eye.
Equatorial coordinates for 21 Sgr: right ascension 18h 25m 21s, declination −20° 32′ 30″ (J2000), in the region of the Sagittarius constellation (IAU figure Sgr).
21 Sgr. It appears in classical and modern catalogs as HIP 90289, HD 169420, Gaia DR3 4091210409716888704. In the SkyKeepsake Sagittarius (Sgr) browse hub it sits with other stars of the same IAU figure.
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Compose this starFactsHIP 90289
- Right ascension
- 18h 25m 21s
- Declination
- −20° 32′ 30″
- Magnitude
- 4.34
- Distance
- ≈ 481 ly
Data: gaia-dr3