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: 6:49  
clear_day Transit: 12:50  
SunsetSet: 18:50 south
wb_twilight Astronomical TwilightWhat's Visible Now
All Constellations » Cetus » 


Altitude: -25.0°   Azimuth: 91.1°   Direction: East

HR745 is a hypergiant star in the constellation of Cetus.

HR745 visual magnitude is 6.21. Because of its reltive faintness, HR745 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 HR745:


HR745 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -25.0°
Azimuth: 91.1°
Direction: East

Celestial coordinates and finder chart of HR745

HR745 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 HR745 are provided in the following table:

02h 33m 40s
-20° 00’ 06”

The simplified sky map below shows the position of HR745 in the sky:

Finder chart HR745 star
Simplified finder chart for HR745.

Visibility of HR745 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 HR745 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: 110.0°
Max altitude: 18.5°
Azimuth: 250.0°

Digitized Sky Survey image of HR745

The image below is a photograph of HR745 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 HR745 is -0.041 arcsec per year in Right Ascension and -0.079 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR745 star
DSS2 image of HR745. The red arrow shows the motion of HR745 during the next 10000 years (-6.83 arcmin in Right Ascension and -13.17 arcmin in declination);

Distance of HR745 from the Sun and relative movement

HR745 is distant 365.06 light years from the Sun and it is moving towards the Sun at the speed of 6 kilometers per second.

111.98 pc
365.06 ly
-6 km/s
-0.041 arcsec/year
-0.079 arcsec/year

Spectral properties of HR745

HR745 belongs to spectral class K0


The red dot in the diagram below shows where HR745 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR745. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR745