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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
SunriseRise: 5:39  
clear_day Transit: 12:56  
SunsetSet: 20:14
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All Constellations » Octans » 

HR7812

Altitude: -47.9°   Azimuth: 192.3°   Direction: South-South-West

HR7812 is a giant star in the constellation of Octans.

HR7812 visual magnitude is 5.91. Because of its reltive faintness, HR7812 should be visible only from locations with dark skies, while it is not visible at all from skies affected by light pollution.

The proper motion of HR7812 is -0.005 arcsec per year in Right Ascension and -0.03 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR7812 star
DSS2 image of HR7812. The red arrow shows the motion of HR7812 during the next 10000 years (-0.83 arcmin in Right Ascension and -5.00 arcmin in declination);

Key facts about HR7812

5.91
Giant

HR7812 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -47.9°
Azimuth: 192.3°
Direction: South-South-West

Celestial coordinates and finder chart of HR7812

HR7812 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 HR7812 are provided in the following table:

20h 38m 18s
-81° 17’ 20”
311.99°
-30.75°
Octans

The simplified sky map below shows the position of HR7812 in the sky:

Finder chart HR7812 star
Simplified finder chart for HR7812.

Visibility of HR7812 from your location

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

HR7812 is currently not visible from Greenwich, United Kingdom edit_location_alt

Distance of HR7812 from the Sun and relative movement

HR7812 is distant 635.48 light years from the Sun

194.93 pc
635.48 ly
-0.005 arcsec/year
-0.03 arcsec/year

Spectral properties of HR7812

HR7812 belongs to spectral class K5 and has a luminosity class of III corresponding to a giant star.

-0.54
K5III
3503K

The red dot in the diagram below shows where HR7812 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR7812. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR7812

SAO258864
SAO258864