Your guide to the Solar System and the night sky
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🌎  Observing from: Greenwich, United Kingdom [change]
🌅 Sunrise: 6:03  ☀️ Transit: 12:06  🌅 Sunset: 18:09


HR5821 is a double giant star in the constellation of Lupus.

HR5821 visual magnitude is 6.23. Because of its reltive faintness, HR5821 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 HR5821:

HR5821 is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of HR5821

HR5821 is situated south of the celestial equator, as such, it is more easily visible from the southern emisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR5821 are provided in the following table:

15h 40m 58s
-47° 44’ 08”

The simplified sky map below shows the position of HR5821 in the sky:

Finder chart HR5821 star
Simplified finder chart for HR5821.

Visibility of HR5821 from your location

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

HR5821 is currently not visible from Greenwich, United Kingdom [change]

Digitized Sky Survey image of HR5821

The image below is a photograph of HR5821 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 HR5821 is -0.027 arcsec per year in Right Ascension and -0.025 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR5821 star
DSS2 image of HR5821. The red arrow shows the motion of HR5821 during the next 10000 years (-4.50 arcmin in Right Ascension and -4.17 arcmin in declination);

Distance of HR5821 from the Sun and relative movement

HR5821 is distant 883.47 light years from the Sun and it is moving towards the Sun at the speed of 54 kilometers per second.

271.00 pc
883.47 ly
-54 km/s
-0.027 arcsec/year
-0.025 arcsec/year

Spectral properties of HR5821

HR5821 belongs to spectral class K5 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR5821 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR5821. Attribution: Richard Powell / CC BY-SA

HR5821 star system properties

HR5821 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 HR5821 double sysyem:

18.1 arcsec

Alternative designations of HR5821