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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
north SunriseRise: 7:52  
clear_day Transit: 11:51  
SunsetSet: 15:49 south
sleep NighttimeWhat's Visible Now?
All Constellations » Perseus » 


Altitude: 21.6°   Azimuth: 298.3°   Direction: West-North-West

HR991 is a bright giant star in the constellation of Perseus.

HR991 visual magnitude is 4.82. Because of its moderate brightness, HR991 should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The table below summarizes the key facts about HR991:

Bright giant

HR991 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 21.6°
Azimuth: 298.3°
Direction: West-North-West

Celestial coordinates and finder chart of HR991

HR991 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 HR991 are provided in the following table:

03h 18m 43s
+34° 13’ 22”

The simplified sky map below shows the position of HR991 in the sky:

Finder chart HR991 star
Simplified finder chart for HR991.

Visibility of HR991 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 HR991 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: 55.8°
Max altitude: 72.7°
Azimuth: 304.2°

Digitized Sky Survey image of HR991

The image below is a photograph of HR991 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 HR991 is 0.003 arcsec per year in Right Ascension and -0.006 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of HR991 star
DSS2 image of HR991. The red arrow shows the motion of HR991 during the next 100000 years (5.00 arcmin in Right Ascension and -10.00 arcmin in declination);

Distance of HR991 from the Sun and relative movement

HR991 is distant 1,475.11 light years from the Sun and it is moving far from the Sun at the speed of 2 kilometers per second.

452.49 pc
1,475.11 ly
2 km/s
0.003 arcsec/year
-0.006 arcsec/year

Spectral properties of HR991

HR991 belongs to spectral class K2 and has a luminosity class of II corresponding to a bright giant star.


The red dot in the diagram below shows where HR991 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR991. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR991