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: 6:54  
clear_day Transit: 12:49  
SunsetSet: 18:43 south
sunny DaytimeWhat's Visible Now
All Constellations » Orion » 


Altitude: -29.4°   Azimuth: 312.3°   Direction: North-West

HR1873 is a double main-sequence star in the constellation of Orion.

HR1873 visual magnitude is 6.22. Because of its reltive faintness, HR1873 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 HR1873:


HR1873 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -29.4°
Azimuth: 312.3°
Direction: North-West

Celestial coordinates and finder chart of HR1873

HR1873 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 HR1873 are provided in the following table:

05h 34m 03s
-01° 02’ 08”

The simplified sky map below shows the position of HR1873 in the sky:

Finder chart HR1873 star
Simplified finder chart for HR1873.

Visibility of HR1873 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 HR1873 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: 91.0°
Max altitude: 37.5°
Azimuth: 269.0°

Digitized Sky Survey image of HR1873

The image below is a photograph of HR1873 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 HR1873 is 0.007 arcsec per year in Right Ascension and 0.001 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of HR1873 star
DSS2 image of HR1873. The red arrow shows the motion of HR1873 during the next 100000 years (11.67 arcmin in Right Ascension and 1.67 arcmin in declination);

Distance of HR1873 from the Sun and relative movement

HR1873 is distant 1,239.54 light years from the Sun and it is moving far from the Sun at the speed of 4 kilometers per second.

380.23 pc
1,239.54 ly
4 km/s
0.007 arcsec/year
0.001 arcsec/year

Spectral properties of HR1873

HR1873 belongs to spectral class B2 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where HR1873 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR1873. Attribution: Richard Powell / CC BY-SA

HR1873 star system properties

HR1873 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 HR1873 double sysyem:

27.5 arcsec

Alternative designations of HR1873