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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 4:52 
Transit: 12:57 
Sunset: 21:03
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All Constellations » Taurus » 

81 Tauri

Above the horizon.  Rise: 5:42 | Tran: 13:03 | Set: 20:23
Alt: 50.77°   Az: 211.82°   Direction: South-South-West

81 Tauri is a double star of spectral class A5 in the constellation of Taurus.

81 Tauri visual magnitude is 5.48. Because of its faintness, 81 Tauri is visible to the naked eye only from locations with very dark skies, while it is not visible at all from skies affected by light pollution.

Image of 81 Tauri star
DSS2 image of 81 Tauri. The red arrow shows the motion of 81 Tauri during the next 1000 years (1.72 arcmin in Right Ascension and -0.38 arcmin in declination);

Celestial Coordinates

Apparent

04h 32m 05s
+15° 44’ 43”
01h 21m 04s
05h 53m 10s

J2000

04h 30m 38s
+15° 41’ 30”

Galactic Coordinates

180.82°
-21.75°

Finder Chart

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Finder chart for 81 Tauri.

Magnitude, Color, Spectral Class

5.48

2.25
A5
7726K

The red dot in the diagram below shows where 81 Tauri is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 81 Tauri. Attribution: Richard Powell / CC BY-SA

Star System Properties

81 Tauri is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the 81 Tauri double sysyem:

5.48
9.38
3.9
162 arcsec

Distance, Radial Speed, Proper Motion

81 Tauri is distant 144.57 light years from the Sun and it is moving far from the Sun at the speed of 39 kilometers per second.

44.35
144.57
39 km/s
0.103 arcsec/y
-0.023"/y

Alternative Designations

SAO93978
SAO93978

Visibility from Your Location

Today's 81 Tauri rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 74.3°
Max altitude: 54.3°
Azimuth: 285.7°