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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: 7:40  
clear_day Transit: 11:47  
SunsetSet: 15:53 south
sunny DaytimeWhat's Visible Now?
All Constellations » Gemini » 


Altitude: -24.0°   Azimuth: 8.4°   Direction: North

HR2391 is a giant star in the constellation of Gemini.

HR2391 visual magnitude is 5.53. Because of its reltive faintness, HR2391 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 HR2391:


HR2391 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -24.0°
Azimuth: 8.4°
Direction: North

Celestial coordinates and finder chart of HR2391

HR2391 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 HR2391 are provided in the following table:

06h 33m 36s
+14° 09’ 19”

The simplified sky map below shows the position of HR2391 in the sky:

Finder chart HR2391 star
Simplified finder chart for HR2391.

Visibility of HR2391 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 HR2391 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: 75.8°
Max altitude: 52.7°
Azimuth: 284.2°

Digitized Sky Survey image of HR2391

The image below is a photograph of HR2391 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 HR2391 is -0.019 arcsec per year in Right Ascension and -0.085 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR2391 star
DSS2 image of HR2391. The red arrow shows the motion of HR2391 during the next 10000 years (-3.17 arcmin in Right Ascension and -14.17 arcmin in declination);

Distance of HR2391 from the Sun and relative movement

HR2391 is distant 255.69 light years from the Sun and it is moving towards the Sun at the speed of 12 kilometers per second.

78.43 pc
255.69 ly
-12 km/s
-0.019 arcsec/year
-0.085 arcsec/year

Spectral properties of HR2391

HR2391 belongs to spectral class K2


The red dot in the diagram below shows where HR2391 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR2391. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR2391