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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 6:49  
clear_day Transit: 12:50  
SunsetSet: 18:50 south
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All Constellations » Triangulum Australe » 


Altitude: -56.6°   Azimuth: 221.6°   Direction: South-West

HR5851 is a double giant star in the constellation of Triangulum Australe.

HR5851 visual magnitude is 6.18. Because of its reltive faintness, HR5851 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 HR5851:


HR5851 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -56.6°
Azimuth: 221.6°
Direction: South-West

Celestial coordinates and finder chart of HR5851

HR5851 is situated south of the celestial equator, as such, it is more easily visible from the southern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR5851 are provided in the following table:

15h 47m 53s
-65° 26’ 32”
Triangulum Australe

The simplified sky map below shows the position of HR5851 in the sky:

Finder chart HR5851 star
Simplified finder chart for HR5851.

Visibility of HR5851 from your location

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

HR5851 is currently not visible from Greenwich, United Kingdom edit_location_alt

Digitized Sky Survey image of HR5851

The image below is a photograph of HR5851 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 HR5851 is -0.005 arcsec per year in Right Ascension and -0.042 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR5851 star
DSS2 image of HR5851. The red arrow shows the motion of HR5851 during the next 10000 years (-0.83 arcmin in Right Ascension and -7.00 arcmin in declination);

Distance of HR5851 from the Sun and relative movement

HR5851 is distant 405.98 light years from the Sun and it is moving towards the Sun at the speed of 30 kilometers per second.

124.53 pc
405.98 ly
-30 km/s
-0.005 arcsec/year
-0.042 arcsec/year

Spectral properties of HR5851

HR5851 belongs to spectral class A5 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR5851 is situated in the HertzsprungÔÇôRussell diagram.

HR Diagram
H-R diagram showing the position of HR5851. Attribution: Richard Powell / CC BY-SA

HR5851 star system properties

HR5851 is a visual double star which can be observed with the help of medium or large telescopes. The table below shows key information about the HR5851 double sysyem:

1.9 arcsec

Alternative designations of HR5851