V640-Her (Star)
R/B-band color composite image from the Second Digitized Sky Survey (DSS2), measuring 30 arcminutes across.
From Cambridge , V640-Her is visible in the evening sky, becoming accessible around 21:42 (EDT), 62° above your south-eastern horizon, as dusk fades to darkness. It will then reach its highest point in the sky at 22:28, 64° above your southern horizon. It will continue to be observable until around 03:30, when it sinks below 21° above your western horizon.
Name
V640-Her
|
Object type
Star
|
Other names
Position
Right ascension: | 17h25m54s [4] |
Declination: | +16°55'03" [4] |
Constellation: | Hercules |
Magnitude: Variable | 6.18 (V) [2] 8.14 (BT) [2] 6.34 (VT) [2] 4.76 (G) [4] 6.40 (BP) [4] 3.52 (RP) [4] |
Distance: | 222.9 parsec 726.7 lightyrs [4] |
B-V Color (mag): | 1.53 |
Proper motion (speed): | 21.5 mas/yr[4] |
Proper motion (pos ang): | 318.4° |
Derived quantities
Absolute mag (V): | -0.56 |
Sources