21-Oph (Star)
R/B-band color composite image from the Second Digitized Sky Survey (DSS2), measuring 30 arcminutes across.
From Cambridge , 21-Oph will become visible at around 20:56 (EDT), 46° above your south-western horizon, as dusk fades to darkness. It will then sink towards the horizon, setting at 01:59.
Name
21-Oph
|
Object type
Star
|
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