Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 4:49  
clear_day Transit: 12:56  
SunsetSet: 21:04 south
wb_twilight Nautical TwilightWhat's Visible Now
All Constellations » Orion » 


HR2231 is a main-sequence star in the constellation of Orion.

HR2231 visual magnitude is 6.07. Because of its reltive faintness, HR2231 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 HR2231:

HR2231 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Celestial coordinates and finder chart of HR2231

HR2231 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 HR2231 are provided in the following table:

06h 15m 40s
+06° 03’ 57”

The simplified sky map below shows the position of HR2231 in the sky:

Finder chart HR2231 star
Simplified finder chart for HR2231.

Visibility of HR2231 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 HR2231 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: 83.9°
Max altitude: 44.6°
Azimuth: 276.1°
HR2231 is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR2231

The image below is a photograph of HR2231 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 HR2231 is -0.008 arcsec per year in Right Ascension and -0.024 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR2231 star
DSS2 image of HR2231. The red arrow shows the motion of HR2231 during the next 10000 years (-1.33 arcmin in Right Ascension and -4.00 arcmin in declination);

Distance of HR2231 from the Sun and relative movement

HR2231 is distant 742.60 light years from the Sun and it is moving far from the Sun at the speed of 26 kilometers per second.

227.79 pc
742.60 ly
26 km/s
-0.008 arcsec/year
-0.024 arcsec/year

Spectral properties of HR2231

HR2231 belongs to spectral class B6 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where HR2231 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR2231. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR2231