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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 4:59 
Transit: 12:56 
Sunset: 20:54
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All Constellations » Aquarius » 

81 Aquarii

Below the horizon.  Rise: 2:38 | Tran: 8:02 | Set: 13:25
Alt: -41.71°   Az: 30.64°   Direction: North-North-East

81 Aquarii is a giant star of spectral class K5 in the constellation of Aquarius.

81 Aquarii visual magnitude is 6.21. Because of its faintness, 81 Aquarii 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 Aquarii star
DSS2 image of 81 Aquarii. The red arrow shows the motion of 81 Aquarii during the next 10000 years (-2.50 arcmin in Right Ascension and -1.83 arcmin in declination);

Celestial Coordinates

Apparent

23h 02m 42s
-06° 55’ 27”
13h 30m 08s
12h 32m 51s

J2000

23h 01m 23s
-07° 03’ 39”

Galactic Coordinates

65.42°
-57.08°

Finder Chart

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Finder chart for 81 Aquarii.

Magnitude, Color, Spectral Class

6.21
Giant

0.67
K5III
3934K

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

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

Distance, Radial Speed, Proper Motion

81 Aquarii is distant 418.49 light years from the Sun and it is moving towards the Sun at the speed of 2 kilometers per second.

128.37
418.49
-2 km/s
-0.015 arcsec/y
-0.011"/y

Alternative Designations

SAO146447
SAO146447

Visibility from Your Location

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

Azimuth: 96.9°
Max altitude: 31.6°
Azimuth: 263.1°