τ⁴-Ser (Star)

R/B-band color composite image from the Second Digitized Sky Survey (DSS2), measuring 30 arcminutes across.

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From South El Monte , τ⁴-Ser is visible in the dawn sky, rising at 02:45 (PST) and reaching an altitude of 36° above the eastern horizon before fading from view as dawn breaks at around 05:46.

Name τ⁴-Ser
Object type Star
Other names
τ⁴-Ser
Tau4 Serpentis Caput
17-Ser
17 Serpentis Caput
HD 139216
HIP 76423[2]
TYC 1494-616-1[1]
Position
Right ascension:15h36m28s [1]
Declination:+15°06'05" [1]
Constellation:Serpens Caput
Magnitude:6.57 (V) [1]
8.11 (BT) [1]
6.70 (VT) [1]
Distance:205.8 parsec
670.8 lightyrs [2]
B-V Color (mag):1.20
Proper motion (speed):9.6 mas/yr[2]
Proper motion (pos ang):337.6°
Derived quantities
Absolute mag (V):0.00

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