21-Oph (Star)
R/B-band color composite image from the Second Digitized Sky Survey (DSS2), measuring 30 arcminutes across.
From Columbus , 21-Oph is visible in the morning sky, becoming accessible around 23:07, when it reaches an altitude of 20° above your eastern horizon. It will then reach its highest point in the sky at 03:20, 51° above your southern horizon. It will be lost to dawn twilight around 05:09, 44° above your south-western horizon.
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Name
21-Oph
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Object type
Star
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Position
| Right ascension: | 16h51m24s [2] |
| Declination: | +01°12'57" [2] |
| Constellation: | Ophiuchus |
| Magnitude: | 5.52 (V) [2] 5.58 (BT) [2] 5.52 (VT) [2] |
| Distance: | 116.1 parsec 378.6 lightyrs [3] |
| B-V Color (mag): | 0.05 |
| Proper motion (speed): | 22.4 mas/yr[3] |
| Proper motion (pos ang): | 231.4° |
Derived quantities
| Absolute mag (V): | 0.19 |
Sources