We use cookies to deliver essential features and to measure their performance. Learn more.
Keep TheSkyLive Ad-Free! Donate Now!
public LocationGreenwich, UK
TimezoneEurope/London
Sunrise: 5:14 
Transit: 13:06 
Sunset: 20:58
sunny   (Daytime)   What's Visible Now?
All Constellations » Pisces » 

HR81

Above the horizon.  Rise: 22:13 | Tran: 5:12 | Set: 12:07
Alt: 22.47°   Az: 259.35°   Direction: West

HR81 is a double hypergiant star of spectral class A0 in the constellation of Pisces.

HR81 visual magnitude is 6.56. Because of its faintness, HR81 is not visible to the naked eye.

Image of HR81 star
DSS2 image of HR81. The red arrow shows the motion of HR81 during the next 10000 years (-7.67 arcmin in Right Ascension and -4.67 arcmin in declination);

Celestial Coordinates

Apparent

00h 22m 10s
+11° 06’ 47”
04h 30m 58s
04h 53m 09s

J2000

00h 20m 54s
+10° 58’ 36”

Galactic Coordinates

110.93°
-51.18°

Finder Chart

Finder chart HR81 star
Simplified finder chart for HR81.

Magnitude, Color, Spectral Class

6.56
Hypergiant

0.15
A0V
10125K

The red dot in the diagram below shows where HR81 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR81. Attribution: Richard Powell / CC BY-SA

Star System Properties

HR81 is a visual double star which can be observed with the help of large telescopes. The table below shows key information about the HR81 double sysyem:

6.56
6.76
0.2
0.6 arcsec

Distance, Radial Speed, Proper Motion

HR81 is distant 624.52 light years from the Sun and it is moving towards the Sun at the speed of 18 kilometers per second.

191.57
624.52
-18 km/s
-0.046 arcsec/y
-0.028"/y

Alternative Designations

SAO91858
SAO91858

Visibility from Your Location

Today's HR81 rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 78.9°
Max altitude: 49.6°
Azimuth: 281.1°