σ-Oph (Star)
Color-magnitude diagram
R/B-band color composite image from the Second Digitized Sky Survey (DSS2), measuring 30 arcminutes across.
Finder chart
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From Cambridge , σ-Oph will become visible at around 17:27 (EST), 20° above your western horizon, as dusk fades to darkness. It will then sink towards the horizon, setting 3 hours and 8 minutes after the Sun at 19:24.
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|
Name
σ-Oph
|
Object type
Star
|
Other names
Position
| Right ascension: | 17h26m30s [4] |
| Declination: | +04°08'25" [4] |
| Constellation: | Ophiuchus |
| Magnitude: Variable | 4.33 (V) [2] 6.29 (BT) [2] 4.50 (VT) [2] 3.82 (G) [4] 4.62 (BP) [4] 2.98 (RP) [4] |
| Distance: | 266.1 parsec 867.5 lightyrs [4] |
| B-V Color (mag): | 1.53 |
| Proper motion (speed): | 6.9 mas/yr[4] |
| Proper motion (pos ang): | 12.2° |
Derived quantities
| Absolute mag (V): | -2.79 |
Visibility from Cambridge
All times shown in Cambridge local time.