We use cookies to deliver essential features and to measure their performance. By using this site you accept our Privacy Policies.
A Complete Guide to the Solar System and the Night Sky
Donate now and help us to keep this site free and ad-free!
public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:37  
clear_day Transit: 11:46  
SunsetSet: 15:55 south
wb_twilight Nautical TwilightWhat's Visible Now?
All Constellations » Libra » 


Altitude: -4.7°   Azimuth: 261.8°   Direction: West

HR5815 is a double sub-giant star in the constellation of Libra.

HR5815 visual magnitude is 6.5. Because of its reltive faintness, HR5815 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 HR5815:


HR5815 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -4.7°
Azimuth: 261.8°
Direction: West

Celestial coordinates and finder chart of HR5815

HR5815 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 HR5815 are provided in the following table:

15h 38m 39s
-08° 47’ 39”

The simplified sky map below shows the position of HR5815 in the sky:

Finder chart HR5815 star
Simplified finder chart for HR5815.

Visibility of HR5815 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 HR5815 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: 98.8°
Max altitude: 29.7°
Azimuth: 261.2°

Digitized Sky Survey image of HR5815

The image below is a photograph of HR5815 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 HR5815 is 0.022 arcsec per year in Right Ascension and -0.014 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR5815 star
DSS2 image of HR5815. The red arrow shows the motion of HR5815 during the next 10000 years (3.67 arcmin in Right Ascension and -2.33 arcmin in declination);

Distance of HR5815 from the Sun and relative movement

HR5815 is distant 73.74 light years from the Sun and it is moving far from the Sun at the speed of 4 kilometers per second.

22.62 pc
73.74 ly
4 km/s
0.022 arcsec/year
-0.014 arcsec/year

Spectral properties of HR5815

HR5815 belongs to spectral class F6 and has a luminosity class of IV corresponding to a sub-giant star.


The red dot in the diagram below shows where HR5815 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR5815. Attribution: Richard Powell / CC BY-SA

HR5815 star system properties

HR5815 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 HR5815 double sysyem:

11.9 arcsec

Alternative designations of HR5815