τ-Sgr (Star)
R/B-band color composite image from the Second Digitized Sky Survey (DSS2), measuring 30 arcminutes across.
From Cambridge , τ-Sgr is difficult to observe as it will appear no higher than 17° above the horizon. It is visible in the dawn sky, rising at 01:54 (EDT) and reaching an altitude of 17° above the southern horizon before fading from view as dawn breaks at around 04:47.
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Name
τ-Sgr
|
Object type
Star
|
Position
| Right ascension: | 19h06m56s [2] |
| Declination: | −27°40'13" [2] |
| Constellation: | Sagittarius |
| Magnitude: | 3.30 (V) [2] 4.82 (BT) [2] 3.43 (VT) [2] |
| Distance: | 37.3 parsec 121.6 lightyrs [3] |
| B-V Color (mag): | 1.18 |
| Proper motion (speed): | 254.9 mas/yr[3] |
| Proper motion (pos ang): | 191.5° |
Derived quantities
| Absolute mag (V): | 0.44 |
Sources