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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: 7:38  
clear_day Transit: 11:46  
SunsetSet: 15:54 south
sleep NighttimeWhat's Visible Now?
All Constellations » Cetus » 


Altitude: 33.9°   Azimuth: 133.3°   Direction: South-East

HR816 is a giant star in the constellation of Cetus.

HR816 visual magnitude is 6.03. Because of its reltive faintness, HR816 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 HR816:


HR816 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 33.9°
Azimuth: 133.3°
Direction: South-East

Celestial coordinates and finder chart of HR816

HR816 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 HR816 are provided in the following table:

02h 45m 20s
+04° 42’ 42”

The simplified sky map below shows the position of HR816 in the sky:

Finder chart HR816 star
Simplified finder chart for HR816.

Visibility of HR816 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 HR816 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: 85.3°
Max altitude: 43.2°
Azimuth: 274.7°

Digitized Sky Survey image of HR816

The image below is a photograph of HR816 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 HR816 is 0.068 arcsec per year in Right Ascension and -0.043 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR816 star
DSS2 image of HR816. The red arrow shows the motion of HR816 during the next 10000 years (11.33 arcmin in Right Ascension and -7.17 arcmin in declination);

Distance of HR816 from the Sun and relative movement

HR816 is distant 167.18 light years from the Sun and it is moving far from the Sun at the speed of 20 kilometers per second.

51.28 pc
167.18 ly
20 km/s
0.068 arcsec/year
-0.043 arcsec/year

Spectral properties of HR816

HR816 belongs to spectral class F0


The red dot in the diagram below shows where HR816 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR816. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR816