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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
SunriseRise: 7:03  
clear_day Transit: 12:12  
SunsetSet: 17:22
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All Constellations » Vela » 


Altitude: -19.6°   Azimuth: 163.4°   Direction: South-South-East

HR4180 is a multiple supergiant star in the constellation of Vela.

HR4180 visual magnitude is 4.28. Because of its moderate brightness, HR4180 should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The proper motion of HR4180 is -0.019 arcsec per year in Right Ascension and 0.005 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR4180 star
DSS2 image of HR4180. The red arrow shows the motion of HR4180 during the next 10000 years (-3.17 arcmin in Right Ascension and 0.83 arcmin in declination);

Key facts about HR4180


HR4180 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -19.6°
Azimuth: 163.4°
Direction: South-South-East

Celestial coordinates and finder chart of HR4180

HR4180 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 HR4180 are provided in the following table:

10h 39m 18s
-55° 36’ 11”

The simplified sky map below shows the position of HR4180 in the sky:

Finder chart HR4180 star
Simplified finder chart for HR4180.

Visibility of HR4180 from your location

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

HR4180 is currently not visible from Greenwich, United Kingdom edit_location_alt

Distance of HR4180 from the Sun and relative movement

HR4180 is distant 900.55 light years from the Sun and it is moving far from the Sun at the speed of 20 kilometers per second.

276.24 pc
900.55 ly
20 km/s
-0.019 arcsec/year
0.005 arcsec/year

Spectral properties of HR4180

HR4180 belongs to spectral class G2 and has a luminosity class of I corresponding to a supergiant star.


The red dot in the diagram below shows where HR4180 is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of HR4180. Attribution: Richard Powell / CC BY-SA

HR4180 star system properties

HR4180 is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the HR4180 double sysyem:

51.8 arcsec

Alternative designations of HR4180