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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 4:46 
Transit: 12:58 
Sunset: 21:11
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All Constellations » Corona Borealis » 

τ Coronae Borealis (tau Coronae Borealis)

Below the horizon.  Rise: 13:38 | Tran: 0:07 | Set: 10:39
Alt: -0.58°   Az: 345.06°   Direction: North-North-West

τ Coronae Borealis is a variable and double giant star of spectral class K1 in the constellation of Corona Borealis. Please note that τ Coronae Borealis should not be confused with recurrent nova T Coronae Borealis.

τ Coronae Borealis visual magnitude is 4.76. Because of its moderate brightness, τ Coronae Borealis is easily visible to the naked eye from locations with dark skies, while it might be barely visible, or not visible at all, from light-polluted skies.

Image of τ Coronae Borealis (tau Coronae Borealis) star
DSS2 image of τ Coronae Borealis. The red arrow shows the motion of τ Coronae Borealis during the next 1000 years (-0.88 arcmin in Right Ascension and 5.55 arcmin in declination);

Celestial Coordinates

Apparent

16h 09m 54s
+36° 25’ 30”
10h 45m 14s
02h 55m 08s

J2000

16h 08m 58s
+36° 29’ 26”

Galactic Coordinates

58.39°
47.47°

Finder Chart

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Finder chart for τ Coronae Borealis (tau Coronae Borealis).

Magnitude, Color, Spectral Class

4.76
Giant

2.06
K1III
4719K

The red dot in the diagram below shows where τ Coronae Borealis is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of τ Coronae Borealis. Attribution: Richard Powell / CC BY-SA

Star System Properties

τ Coronae Borealis is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the τ Coronae Borealis double sysyem:

4.76
13.06
8.3
2.2 arcsec

Distance, Radial Speed, Proper Motion

τ Coronae Borealis is distant 113.04 light years from the Sun and it is moving towards the Sun at the speed of 19 kilometers per second.

34.67
113.04
-19 km/s
-0.053 arcsec/y
0.333"/y

Alternative Designations

τ Coronae Borealis
(tau Coronae Borealis)
16 Coronae Borealis
SAO65108
SAO65108

Visibility from Your Location

Today's τ Coronae Borealis (tau Coronae Borealis) rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 53.6°
Max altitude: 74.9°
Azimuth: 306.4°