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: 7:00  
clear_day Transit: 12:48  
SunsetSet: 18:34 south
sunny DaytimeWhat's Visible Now
All Constellations » Indus » 


Altitude: -70.6°   Azimuth: 143.4°   Direction: South-East

HR8331 is a hypergiant star in the constellation of Indus.

HR8331 visual magnitude is 5.62. Because of its reltive faintness, HR8331 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 HR8331:


HR8331 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -70.6°
Azimuth: 143.4°
Direction: South-East

Celestial coordinates and finder chart of HR8331

HR8331 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 HR8331 are provided in the following table:

21h 50m 00s
-64° 42’ 45”

The simplified sky map below shows the position of HR8331 in the sky:

Finder chart HR8331 star
Simplified finder chart for HR8331.

Visibility of HR8331 from your location

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

HR8331 is currently not visible from Greenwich, United Kingdom edit_location_alt

Digitized Sky Survey image of HR8331

The image below is a photograph of HR8331 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 HR8331 is -0.003 arcsec per year in Right Ascension and -0.042 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR8331 star
DSS2 image of HR8331. The red arrow shows the motion of HR8331 during the next 10000 years (-0.50 arcmin in Right Ascension and -7.00 arcmin in declination);

Distance of HR8331 from the Sun and relative movement

HR8331 is distant 333.67 light years from the Sun and it is moving towards the Sun at the speed of 1 kilometers per second.

102.35 pc
333.67 ly
-1 km/s
-0.003 arcsec/year
-0.042 arcsec/year

Spectral properties of HR8331

HR8331 belongs to spectral class K0 and has a luminosity class of III corresponding to a hypergiant star.


The red dot in the diagram below shows where HR8331 is situated in the HertzsprungÔÇôRussell diagram.

HR Diagram
H-R diagram showing the position of HR8331. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR8331