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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
north SunriseRise: 7:47  
clear_day Transit: 11:49  
SunsetSet: 15:50 south
wb_twilight Astronomical TwilightWhat's Visible Now?
All Constellations » Cetus » 


Altitude: 25.2°   Azimuth: 152.3°   Direction: South-South-East

HR51 is a main-sequence star in the constellation of Cetus.

HR51 visual magnitude is 5.75. Because of its reltive faintness, HR51 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 HR51:


HR51 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 25.2°
Azimuth: 152.3°
Direction: South-South-East

Celestial coordinates and finder chart of HR51

HR51 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 HR51 are provided in the following table:

00h 14m 54s
-09° 34’ 10”

The simplified sky map below shows the position of HR51 in the sky:

Finder chart HR51 star
Simplified finder chart for HR51.

Visibility of HR51 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 HR51 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: 99.6°
Max altitude: 29.0°
Azimuth: 260.4°

Digitized Sky Survey image of HR51

The image below is a photograph of HR51 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 HR51 is 0.028 arcsec per year in Right Ascension and -0.011 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR51 star
DSS2 image of HR51. The red arrow shows the motion of HR51 during the next 10000 years (4.67 arcmin in Right Ascension and -1.83 arcmin in declination);

Distance of HR51 from the Sun and relative movement

HR51 is distant 346.81 light years from the Sun and it is moving far from the Sun at the speed of 17 kilometers per second.

106.38 pc
346.81 ly
17 km/s
0.028 arcsec/year
-0.011 arcsec/year

Spectral properties of HR51

HR51 belongs to spectral class B9 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where HR51 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR51. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR51