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: -34.8°   Azimuth: 332.9°   Direction: North-North-West

HR1803 is a variable main-sequence star in the constellation of Orion.

HR1803 visual magnitude is 6.16. Because of its reltive faintness, HR1803 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 HR1803:


HR1803 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -34.8°
Azimuth: 332.9°
Direction: North-North-West

Celestial coordinates and finder chart of HR1803

HR1803 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 HR1803 are provided in the following table:

05h 25m 46s
+00° 31’ 14”

The simplified sky map below shows the position of HR1803 in the sky:

Finder chart HR1803 star
Simplified finder chart for HR1803.

Visibility of HR1803 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 HR1803 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: 89.5°
Max altitude: 39.0°
Azimuth: 270.5°

Digitized Sky Survey image of HR1803

The image below is a photograph of HR1803 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 HR1803 is -0.005 arcsec per year in Right Ascension and 0.019 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR1803 star
DSS2 image of HR1803. The red arrow shows the motion of HR1803 during the next 10000 years (-0.83 arcmin in Right Ascension and 3.17 arcmin in declination);

Distance of HR1803 from the Sun and relative movement

HR1803 is distant 1,582.52 light years from the Sun and it is moving towards the Sun at the speed of 24 kilometers per second.

485.44 pc
1,582.52 ly
-24 km/s
-0.005 arcsec/year
0.019 arcsec/year

Spectral properties of HR1803

HR1803 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 HR1803 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR1803. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR1803