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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: 6:59  
clear_day Transit: 12:12  
SunsetSet: 17:25
sunny DaytimeWhat's Visible Now?
All Constellations » Perseus » 


Altitude: 81.5°   Azimuth: 78.7°   Direction: East-North-East

HR891 is a double main-sequence star in the constellation of Perseus.

HR891 visual magnitude is 6.74. Because of its reltive faintness, HR891 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 HR891 is 0.014 arcsec per year in Right Ascension and -0.021 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR891 star
DSS2 image of HR891. The red arrow shows the motion of HR891 during the next 10000 years (2.33 arcmin in Right Ascension and -3.50 arcmin in declination);

Key facts about HR891


HR891 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 81.5°
Azimuth: 78.7°
Direction: East-North-East

Celestial coordinates and finder chart of HR891

HR891 is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR891 are provided in the following table:

03h 00m 53s
+52° 21’ 07”

The simplified sky map below shows the position of HR891 in the sky:

Finder chart HR891 star
Simplified finder chart for HR891.

Visibility of HR891 from your location

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

HR891 is circumpolar and transits at 16:48 UTC (altitude: 89.1°)

Distance of HR891 from the Sun and relative movement

HR891 is distant 676.35 light years from the Sun and it is moving towards the Sun at the speed of 2 kilometers per second.

207.47 pc
676.35 ly
-2 km/s
0.014 arcsec/year
-0.021 arcsec/year

Spectral properties of HR891

HR891 belongs to spectral class B9 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where HR891 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR891. Attribution: Richard Powell / CC BY-SA

HR891 star system properties

HR891 is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the HR891 double sysyem:

11.9 arcsec

Alternative designations of HR891