Rasalhague (Star)

Color-magnitude diagram
Image of Rasalhague
R/B-band color composite image from the Second Digitized Sky Survey (DSS2), measuring 30 arcminutes across.
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From Cape Town , Rasalhague will become visible at around 19:47 (SAST), 24° above your north-western horizon, as dusk fades to darkness. It will then sink towards the horizon, setting 3 hours and 4 minutes after the Sun at 22:04.

Begin typing the name of a town near to you, and then select the town from the list of options which appear below.
Name Rasalhague
Object type Star
Other names
Rasalhague
α-Oph
Alpha Ophiuchi
55-Oph
55 Ophiuchi
HR 6556[1]
HD 159561
NSV 9189
HIP 86032[5]
TYC 1000-2508-1[4]
Position
Right ascension:17h34m56s [3]
Declination:+12°33'38" [3]
Constellation:Ophiuchus
Magnitude:
Variable
2.09 (V) [3]
2.31 (BT) [2]
2.11 (VT) [2]
Distance:14.9 parsec
48.6 lightyrs [5]
B-V Color (mag):0.19
Proper motion (speed):246.5 mas/yr[5]
Proper motion (pos ang):154.0°
Derived quantities
Absolute mag (V):1.22
Visibility from Cape Town

All times shown in Cape Town local time.

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Cape Town

Latitude:
Longitude:
Timezone:

33.93°S
18.42°E
SAST

Color scheme