τ-Oph (Star)
R/B-band color composite image from the Second Digitized Sky Survey (DSS2), measuring 30 arcminutes across.
From South El Monte , τ-Oph is visible all night. It will become visible at around 21:18 (PDT), 23° above your south-eastern horizon, as dusk fades to darkness. It will then reach its highest point in the sky at 00:57, 47° above your southern horizon. It will be lost to dawn twilight at around 04:26, 24° above your south-western horizon.
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Name
τ-Oph
|
Object type
Star
|
Position
| Right ascension: | 18h03m04s [3] |
| Declination: | −08°10'48" [3] |
| Constellation: | Ophiuchus |
| Magnitude: | 4.96 (V) [3] 5.46 (BT) [2] 5.01 (VT) [2] |
| Distance: | 51.3 parsec 167.4 lightyrs [4] |
| B-V Color (mag): | 0.43 |
| Proper motion (speed): | 41.0 mas/yr[4] |
| Proper motion (pos ang): | 157.3° |
Derived quantities
| Absolute mag (V): | 1.41 |
Sources