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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: 7:48  
clear_day Transit: 11:49  
SunsetSet: 15:50 south
sunny DaytimeWhat's Visible Now?
All Constellations » Auriga » 


Altitude: 0.1°   Azimuth: 32.0°   Direction: North-North-East

HR1939 is a variable giant star in the constellation of Auriga.

HR1939 visual magnitude is 6.11. Because of its reltive faintness, HR1939 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 HR1939:


HR1939 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 0.1°
Azimuth: 32.0°
Direction: North-North-East

Celestial coordinates and finder chart of HR1939

HR1939 is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR1939 are provided in the following table:

05h 40m 42s
+31° 55’ 14”

The simplified sky map below shows the position of HR1939 in the sky:

Finder chart HR1939 star
Simplified finder chart for HR1939.

Visibility of HR1939 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 HR1939 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: 58.1°
Max altitude: 70.4°
Azimuth: 301.9°

Digitized Sky Survey image of HR1939

The image below is a photograph of HR1939 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 HR1939 is 0.01 arcsec per year in Right Ascension and 0.006 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR1939 star
DSS2 image of HR1939. The red arrow shows the motion of HR1939 during the next 10000 years (1.67 arcmin in Right Ascension and 1.00 arcmin in declination);

Distance of HR1939 from the Sun and relative movement

HR1939 is distant 1,369.75 light years from the Sun and it is moving far from the Sun at the speed of 5 kilometers per second.

420.17 pc
1,369.75 ly
5 km/s
0.01 arcsec/year
0.006 arcsec/year

Spectral properties of HR1939

HR1939 belongs to spectral class M2 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR1939 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR1939. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR1939