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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: 6:08  
clear_day Transit: 12:59  
SunsetSet: 19:51
sunny DaytimeWhat's Visible Now?
All Constellations » Capricornus » 

HR7989

Altitude: 12.0°   Azimuth: 201.9°   Direction: South-South-West

HR7989 is a double hypergiant star in the constellation of Capricornus.

HR7989 visual magnitude is 6.33. Because of its reltive faintness, HR7989 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 HR7989 is 0.099 arcsec per year in Right Ascension and -0.053 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of HR7989 star
DSS2 image of HR7989. The red arrow shows the motion of HR7989 during the next 1000 years (1.65 arcmin in Right Ascension and -0.88 arcmin in declination);

Key facts about HR7989

6.33
Hypergiant

HR7989 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 12.0°
Azimuth: 201.9°
Direction: South-South-West

Celestial coordinates and finder chart of HR7989

HR7989 is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR7989 are provided in the following table:

20h 53m 01s
-23° 46’ 59”
22.33°
-36.58°
Capricornus

The simplified sky map below shows the position of HR7989 in the sky:

Finder chart HR7989 star
Simplified finder chart for HR7989.

Visibility of HR7989 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 HR7989 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: 113.8°
Max altitude: 14.7°
Azimuth: 246.2°

Distance of HR7989 from the Sun and relative movement

HR7989 is distant 244.56 light years from the Sun and it is moving towards the Sun at the speed of 40 kilometers per second.

75.02 pc
244.56 ly
-40 km/s
0.099 arcsec/year
-0.053 arcsec/year

Spectral properties of HR7989

HR7989 belongs to spectral class K0 and has a luminosity class of III corresponding to a hypergiant star.

1.95
K0III
5051K

The red dot in the diagram below shows where HR7989 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR7989. Attribution: Richard Powell / CC BY-SA

HR7989 star system properties

HR7989 is a visual double star which can be observed with the help of medium or large telescopes. The table below shows key information about the HR7989 double sysyem:

6.33
8.43
2.1
1.8 arcsec

Alternative designations of HR7989

SAO189801
SAO189801