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: 4:50  
clear_day Transit: 12:56  
SunsetSet: 21:03 south
wb_twilight Astronomical TwilightWhat's Visible Now
All Constellations » Coma Berenices » 


HR4705 is a hypergiant star in the constellation of Coma Berenices.

HR4705 visual magnitude is 6.19. Because of its reltive faintness, HR4705 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 HR4705:

HR4705 is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 45°.

Celestial coordinates and finder chart of HR4705

HR4705 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 HR4705 are provided in the following table:

12h 22m 10s
+24° 46’ 26”
Coma Berenices

The simplified sky map below shows the position of HR4705 in the sky:

Finder chart HR4705 star
Simplified finder chart for HR4705.

Visibility of HR4705 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 HR4705 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: 65.2°
Max altitude: 63.3°
Azimuth: 294.8°
HR4705 is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR4705

The image below is a photograph of HR4705 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 HR4705 is -0.062 arcsec per year in Right Ascension and -0.008 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR4705 star
DSS2 image of HR4705. The red arrow shows the motion of HR4705 during the next 10000 years (-10.33 arcmin in Right Ascension and -1.33 arcmin in declination);

Distance of HR4705 from the Sun and relative movement

HR4705 is distant 326.98 light years from the Sun and it is moving towards the Sun at the speed of 4 kilometers per second.

100.30 pc
326.98 ly
-4 km/s
-0.062 arcsec/year
-0.008 arcsec/year

Spectral properties of HR4705

HR4705 belongs to spectral class A0 and has a luminosity class of V corresponding to a hypergiant star.


The red dot in the diagram below shows where HR4705 is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of HR4705. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR4705