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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: 6:57  
clear_day Transit: 12:11  
SunsetSet: 17:27
sunny DaytimeWhat's Visible Now?
All Constellations » Aquarius » 


Altitude: 34.9°   Azimuth: 163.5°   Direction: South-South-East

HR7890 is a giant star in the constellation of Aquarius.

HR7890 visual magnitude is 6.22. Because of its reltive faintness, HR7890 should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The proper motion of HR7890 is 0.006 arcsec per year in Right Ascension and 0.009 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of HR7890 star
DSS2 image of HR7890. The red arrow shows the motion of HR7890 during the next 100000 years (10.00 arcmin in Right Ascension and 15.00 arcmin in declination);

Key facts about HR7890


HR7890 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 34.9°
Azimuth: 163.5°
Direction: South-South-East

Celestial coordinates and finder chart of HR7890

HR7890 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 HR7890 are provided in the following table:

20h 39m 13s
-02° 24’ 46”

The simplified sky map below shows the position of HR7890 in the sky:

Finder chart HR7890 star
Simplified finder chart for HR7890.

Visibility of HR7890 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 HR7890 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: 92.4°
Max altitude: 36.1°
Azimuth: 267.6°

Distance of HR7890 from the Sun and relative movement

HR7890 is distant 1,230.19 light years from the Sun and it is moving towards the Sun at the speed of 14 kilometers per second.

377.36 pc
1,230.19 ly
-14 km/s
0.006 arcsec/year
0.009 arcsec/year

Spectral properties of HR7890

HR7890 belongs to spectral class B7 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR7890 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR7890. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR7890