We use cookies to deliver essential features and to measure their performance. By using this site you accept our Privacy Policies.
A Complete Guide to the Solar System and the Night Sky
Donate now and help us to keep this site free and ad-free!
public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:47  
clear_day Transit: 11:49  
SunsetSet: 15:50 south
sleep NighttimeWhat's Visible Now?
All Constellations » Hydrus » 


Altitude: -43.0°   Azimuth: 169.6°   Direction: South

HR981 is a variable and double bright giant star in the constellation of Hydrus.

HR981 visual magnitude is 5.57. Because of its reltive faintness, HR981 should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about HR981:

Bright giant

HR981 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -43.0°
Azimuth: 169.6°
Direction: South

Celestial coordinates and finder chart of HR981

HR981 is situated close to the southern celestial pole and, as such, it is easilty visible for most part of the year from the southern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR981 are provided in the following table:

03h 07m 32s
-78° 59’ 21”

The simplified sky map below shows the position of HR981 in the sky:

Finder chart HR981 star
Simplified finder chart for HR981.

Visibility of HR981 from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

HR981 is currently not visible from Greenwich, United Kingdom edit_location_alt

Digitized Sky Survey image of HR981

The image below is a photograph of HR981 from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). The proper motion of HR981 is 0.071 arcsec per year in Right Ascension and 0.066 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR981 star
DSS2 image of HR981. The red arrow shows the motion of HR981 during the next 10000 years (11.83 arcmin in Right Ascension and 11.00 arcmin in declination);

Distance of HR981 from the Sun and relative movement

HR981 is distant 248.29 light years from the Sun and it is moving far from the Sun at the speed of 11 kilometers per second.

76.16 pc
248.29 ly
11 km/s
0.071 arcsec/year
0.066 arcsec/year

Spectral properties of HR981

HR981 belongs to spectral class F2 and has a luminosity class of II corresponding to a bright giant star.


The red dot in the diagram below shows where HR981 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR981. Attribution: Richard Powell / CC BY-SA

HR981 star system properties

HR981 is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the HR981 double sysyem:

15.2 arcsec

Alternative designations of HR981