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: 4:47  
clear_day Transit: 12:56  
SunsetSet: 21:06 south
wb_twilight Astronomical TwilightWhat's Visible Now
All Constellations » Coma Berenices » 


HR4751 is a multiple main-sequence star in the constellation of Coma Berenices.

HR4751 visual magnitude is 6.65. Because of its reltive faintness, HR4751 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 HR4751:

HR4751 is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 37°.

Celestial coordinates and finder chart of HR4751

HR4751 is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR4751 are provided in the following table:

12h 28m 44s
+25° 53’ 57”
Coma Berenices

The simplified sky map below shows the position of HR4751 in the sky:

Finder chart HR4751 star
Simplified finder chart for HR4751.

Visibility of HR4751 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 HR4751 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: 64.1°
Max altitude: 64.4°
Azimuth: 295.9°
HR4751 is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR4751

The image below is a photograph of HR4751 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 HR4751 is -0.018 arcsec per year in Right Ascension and -0.021 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR4751 star
DSS2 image of HR4751. The red arrow shows the motion of HR4751 during the next 10000 years (-3.00 arcmin in Right Ascension and -3.50 arcmin in declination);

Distance of HR4751 from the Sun and relative movement

HR4751 is distant 257.50 light years from the Sun and it is moving towards the Sun at the speed of 2 kilometers per second.

78.99 pc
257.50 ly
-2 km/s
-0.018 arcsec/year
-0.021 arcsec/year

Spectral properties of HR4751

HR4751 belongs to spectral class A and has a luminosity class of V corresponding to a main-sequence star. HR4751 is also a so called metallic star.


The red dot in the diagram below shows where HR4751 is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of HR4751. Attribution: Richard Powell / CC BY-SA

HR4751 star system properties

HR4751 is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the HR4751 double sysyem:

145.4 arcsec

Alternative designations of HR4751