The star τ-Cyg
Color-magnitude diagram
Red-band image from the Second Digitized Sky Survey (DSS2), measuring 30 arcminutes across.
Finder chart
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From Ashburn , τ-Cyg is visible in the dawn sky, rising at 21:39 (EDT) – 8 hours and 14 minutes before the Sun – and reaching an altitude of 68° above the eastern horizon before fading from view as dawn breaks at around 04:35.
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|
Name
τ-Cyg
|
Object Type
Star
|
Position
| Constellation: | Cygnus |
| Magnitude: Variable | 3.74 (V)[2] 4.20 (BT)[2] 3.78 (VT)[2] |
| B-V Color (mag): | 0.36 |
| Right Ascension: | 21h14m47s [2] |
| Declination: | +38°02'43" [2] |
| Distance: | 20.6 parsec 67.2 lightyrs [1] |
| Proper motion (speed): | 458.2 mas/yr [1] |
| Proper motion (pos ang): | 24.8° |
Derived Quantities
| Absolute Mag (V): | 2.17 |