Your guide to the Solar System and the night sky
By donating now you help keep this site alive and free from ads. Please consider supporting this project.
🌎  Observing from: Greenwich, United Kingdom [change]
🌅 Sunrise: 6:45  ☀️ Transit: 13:03  🌅 Sunset: 19:23


HR5991 is a double sub-giant star in the constellation of Lupus.

HR5991 visual magnitude is 5.73. Because of its reltive faintness, HR5991 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 HR5991:

HR5991 is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of HR5991

HR5991 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 HR5991 are provided in the following table:

16h 07m 16s
-36° 45’ 20”

The simplified sky map below shows the position of HR5991 in the sky:

Finder chart HR5991 star
Simplified finder chart for HR5991.

Visibility of HR5991 from your location

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

Today's HR5991 rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 126.8°
Max altitude: 1.8°
Azimuth: 233.2°
HR5991 is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR5991

The image below is a photograph of HR5991 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 HR5991 is 0.066 arcsec per year in Right Ascension and -0.043 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR5991 star
DSS2 image of HR5991. The red arrow shows the motion of HR5991 during the next 10000 years (11.00 arcmin in Right Ascension and -7.17 arcmin in declination);

Distance of HR5991 from the Sun and relative movement

HR5991 is distant 169.61 light years from the Sun and it is moving far from the Sun at the speed of 26 kilometers per second.

52.03 pc
169.61 ly
26 km/s
0.066 arcsec/year
-0.043 arcsec/year

Spectral properties of HR5991

HR5991 belongs to spectral class F1 and has a luminosity class of IV corresponding to a sub-giant star.


The red dot in the diagram below shows where HR5991 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR5991. Attribution: Richard Powell / CC BY-SA

HR5991 star system properties

HR5991 is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the HR5991 double sysyem:

40.7 arcsec

Alternative designations of HR5991