Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 4:43  
clear_day Transit: 12:58  
SunsetSet: 21:12 south
wb_twilight Astronomical TwilightWhat's Visible Now
All Constellations » Cetus » 


Altitude: -6.3°   Azimuth: 95.1°   Direction: East

HR72 is a hypergiant star in the constellation of Cetus.

HR72 visual magnitude is 6.46. Because of its reltive faintness, HR72 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 HR72:


HR72 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -6.3°
Azimuth: 95.1°
Direction: East

Celestial coordinates and finder chart of HR72

HR72 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 HR72 are provided in the following table:

00h 18m 41s
-08° 03’ 10”

The simplified sky map below shows the position of HR72 in the sky:

Finder chart HR72 star
Simplified finder chart for HR72.

Visibility of HR72 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 HR72 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: 98.1°
Max altitude: 30.5°
Azimuth: 261.9°
HR72 is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR72

The image below is a photograph of HR72 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 HR72 is 0.413 arcsec per year in Right Ascension and -0.139 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of HR72 star
DSS2 image of HR72. The red arrow shows the motion of HR72 during the next 1000 years (6.88 arcmin in Right Ascension and -2.32 arcmin in declination);

Distance of HR72 from the Sun and relative movement

HR72 is distant 76.40 light years from the Sun and it is moving towards the Sun at the speed of 10 kilometers per second.

23.44 pc
76.40 ly
-10 km/s
0.413 arcsec/year
-0.139 arcsec/year

Spectral properties of HR72

HR72 belongs to spectral class G0 and has a luminosity class of V corresponding to a hypergiant star.


The red dot in the diagram below shows where HR72 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR72. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR72