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: 4:52  
clear_day Transit: 12:55  
SunsetSet: 20:59 south
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All Constellations » Canes Venatici » 


HR4816 is a variable hypergiant star in the constellation of Canes Venatici.

HR4816 visual magnitude is 6.45. Because of its reltive faintness, HR4816 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 HR4816:

HR4816 is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 12°.

Celestial coordinates and finder chart of HR4816

HR4816 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 HR4816 are provided in the following table:

12h 39m 16s
+35° 57’ 06”
Canes Venatici

The simplified sky map below shows the position of HR4816 in the sky:

Finder chart HR4816 star
Simplified finder chart for HR4816.

Visibility of HR4816 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 HR4816 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: 54.0°
Max altitude: 74.5°
Azimuth: 306.0°
HR4816 is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR4816

The image below is a photograph of HR4816 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 HR4816 is 0.022 arcsec per year in Right Ascension and -0.006 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR4816 star
DSS2 image of HR4816. The red arrow shows the motion of HR4816 during the next 10000 years (3.67 arcmin in Right Ascension and -1.00 arcmin in declination);

Distance of HR4816 from the Sun and relative movement

HR4816 is distant 505.43 light years from the Sun and it is moving towards the Sun at the speed of 15 kilometers per second.

155.04 pc
505.43 ly
-15 km/s
0.022 arcsec/year
-0.006 arcsec/year

Spectral properties of HR4816

HR4816 belongs to spectral class A0 HR4816 is also a SrCrEu chemically peculiar star.


The red dot in the diagram below shows where HR4816 is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of HR4816. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR4816