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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: 7:54  
clear_day Transit: 11:51  
SunsetSet: 15:49 south
wb_twilight Nautical TwilightWhat's Visible Now?
All Constellations » Orion » 


Altitude: -15.1°   Azimuth: 60.9°   Direction: East-North-East

HR2251 is a variable and multiple main-sequence star in the constellation of Orion.

HR2251 visual magnitude is 5.71. Because of its reltive faintness, HR2251 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 HR2251:


HR2251 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -15.1°
Azimuth: 60.9°
Direction: East-North-East

Celestial coordinates and finder chart of HR2251

HR2251 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 HR2251 are provided in the following table:

06h 17m 16s
+05° 06’ 01”

The simplified sky map below shows the position of HR2251 in the sky:

Finder chart HR2251 star
Simplified finder chart for HR2251.

Visibility of HR2251 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 HR2251 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: 84.9°
Max altitude: 43.6°
Azimuth: 275.1°

Digitized Sky Survey image of HR2251

The image below is a photograph of HR2251 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 HR2251 is -0.216 arcsec per year in Right Ascension and 0.159 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of HR2251 star
DSS2 image of HR2251. The red arrow shows the motion of HR2251 during the next 1000 years (-3.60 arcmin in Right Ascension and 2.65 arcmin in declination);

Distance of HR2251 from the Sun and relative movement

HR2251 is distant 62.98 light years from the Sun and it is moving far from the Sun at the speed of 13 kilometers per second.

19.32 pc
62.98 ly
13 km/s
-0.216 arcsec/year
0.159 arcsec/year

Spectral properties of HR2251

HR2251 belongs to spectral class F9 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where HR2251 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR2251. Attribution: Richard Powell / CC BY-SA

HR2251 star system properties

HR2251 is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the HR2251 double sysyem:

189.7 arcsec

Alternative designations of HR2251

Gl 231.1A