Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:04  
clear_day Transit: 12:47  
SunsetSet: 18:30 south
sunny DaytimeWhat's Visible Now
All Constellations » Sagittarius » 


Altitude: -57.9°   Azimuth: 70.9°   Direction: East-North-East

HR7631 is a variable main-sequence star in the constellation of Sagittarius.

HR7631 visual magnitude is 5.66. Because of its reltive faintness, HR7631 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 HR7631:


HR7631 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -57.9°
Azimuth: 70.9°
Direction: East-North-East

Celestial coordinates and finder chart of HR7631

HR7631 is situated south of the celestial equator, as such, it is more easily visible from the southern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR7631 are provided in the following table:

20h 00m 20s
-33° 42’ 14”

The simplified sky map below shows the position of HR7631 in the sky:

Finder chart HR7631 star
Simplified finder chart for HR7631.

Visibility of HR7631 from your location

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

Today's HR7631 rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 123.7°
Max altitude: 4.8°
Azimuth: 236.3°

Digitized Sky Survey image of HR7631

The image below is a photograph of HR7631 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 HR7631 is 0.136 arcsec per year in Right Ascension and -0.306 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of HR7631 star
DSS2 image of HR7631. The red arrow shows the motion of HR7631 during the next 1000 years (2.27 arcmin in Right Ascension and -5.10 arcmin in declination);

Distance of HR7631 from the Sun and relative movement

HR7631 is distant 68.06 light years from the Sun and it is moving towards the Sun at the speed of 8 kilometers per second.

20.88 pc
68.06 ly
-8 km/s
0.136 arcsec/year
-0.306 arcsec/year

Spectral properties of HR7631

HR7631 belongs to spectral class F7 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where HR7631 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR7631. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR7631

Gl 773.4