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: 6:43  
clear_day Transit: 12:51  
SunsetSet: 18:59 south
sunny DaytimeWhat's Visible Now
All Constellations » Serpens » 


Altitude: 48.3°   Azimuth: 205.0°   Direction: South-South-West

HR5831 is a double giant star in the constellation of Serpens.

HR5831 visual magnitude is 6.25. Because of its reltive faintness, HR5831 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 HR5831:


HR5831 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 48.3°
Azimuth: 205.0°
Direction: South-South-West

Celestial coordinates and finder chart of HR5831

HR5831 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 HR5831 are provided in the following table:

15h 40m 10s
+12° 03’ 11”

The simplified sky map below shows the position of HR5831 in the sky:

Finder chart HR5831 star
Simplified finder chart for HR5831.

Visibility of HR5831 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 HR5831 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: 77.9°
Max altitude: 50.6°
Azimuth: 282.1°

Digitized Sky Survey image of HR5831

The image below is a photograph of HR5831 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 HR5831 is -0.007 arcsec per year in Right Ascension and -0.007 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of HR5831 star
DSS2 image of HR5831. The red arrow shows the motion of HR5831 during the next 100000 years (-11.67 arcmin in Right Ascension and -11.67 arcmin in declination);

Distance of HR5831 from the Sun and relative movement

HR5831 is distant 1,058.44 light years from the Sun and it is moving towards the Sun at the speed of 21 kilometers per second.

324.68 pc
1,058.44 ly
-21 km/s
-0.007 arcsec/year
-0.007 arcsec/year

Spectral properties of HR5831

HR5831 belongs to spectral class G7 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR5831 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR5831. Attribution: Richard Powell / CC BY-SA

HR5831 star system properties

HR5831 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 HR5831 double sysyem:

16.5 arcsec

Alternative designations of HR5831