21-Sgr (Star)
R/B-band color composite image from the Second Digitized Sky Survey (DSS2), measuring 30 arcminutes across.
From Cambridge , 21-Sgr is visible in the dawn sky, rising at 01:38 (EDT) and reaching an altitude of 25° above the southern horizon before fading from view as dawn breaks at around 05:13.
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Name
21-Sgr
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Object type
Star
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Other names
Position
| Right ascension: | 18h25m21s [4] |
| Declination: | −20°32'30" [4] |
| Constellation: | Sagittarius |
| Magnitude: | 4.87 (V) [2] 6.78 (BT) [2] 5.03 (VT) [2] 4.34 (G) [4] 5.16 (BP) [4] 3.44 (RP) [4] |
| Distance: | 147.4 parsec 480.6 lightyrs [4] |
| B-V Color (mag): | 1.49 |
| Proper motion (speed): | 27.4 mas/yr[4] |
| Proper motion (pos ang): | 167.1° |
Derived quantities
| Absolute mag (V): | -0.97 |
Sources