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Catalog/Triangulum/21 Per

21 Per

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21 Per · Triangulum
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Its story

21 Per has a visual magnitude of about 5.09: under a reasonably dark sky it is typically reachable with the unaided eye.

Equatorial coordinates for 21 Per: right ascension 2h 57m 17s, declination +31° 56′ 3″ (J2000), in the region of the Triangulum constellation (IAU figure Tri).

21 Per. It appears in classical and modern catalogs as HIP 13775, HD 18296, Gaia DR3 135525184764395776. In the SkyKeepsake Triangulum (Tri) browse hub it sits with other stars of the same IAU figure.

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Compose this star
FactsHIP 13775
Right ascension
2h 57m 17s
Declination
+31° 56′ 03″
Magnitude
5.09
Distance
≈ 349 ly
Data: gaia-dr3