τ-Cyg (Star)
R/B-band color composite image from the Second Digitized Sky Survey (DSS2), measuring 30 arcminutes across.
From Columbus , τ-Cyg will become visible at around 18:18 (EST), 82° above your western horizon, as dusk fades to darkness. It will then sink towards the horizon, setting at 02:30.
|
Name
τ-Cyg
|
Object type
Star
|
Position
| Right ascension: | 21h14m47s [2] |
| Declination: | +38°02'43" [2] |
| Constellation: | Cygnus |
| Magnitude: Variable | 3.74 (V) [2] 4.20 (BT) [2] 3.78 (VT) [2] |
| Distance: | 20.3 parsec 66.3 lightyrs [3] |
| B-V Color (mag): | 0.36 |
| Proper motion (speed): | 455.1 mas/yr[3] |
| Proper motion (pos ang): | 25.6° |
Derived quantities
| Absolute mag (V): | 2.20 |
Sources