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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
SunriseRise: 6:44  
clear_day Transit: 12:10  
SunsetSet: 17:38
sleep NighttimeWhat's Visible Now?
All Constellations » Carina » 


Altitude: -21.7°   Azimuth: 182.8°   Direction: South

HR3966 is a bright giant star in the constellation of Carina.

HR3966 visual magnitude is 6.19. Because of its reltive faintness, HR3966 should be visible only from locations with dark skies, while it is not visible at all from skies affected by light pollution.

The proper motion of HR3966 is -0.013 arcsec per year in Right Ascension and 0.005 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR3966 star
DSS2 image of HR3966. The red arrow shows the motion of HR3966 during the next 10000 years (-2.17 arcmin in Right Ascension and 0.83 arcmin in declination);

Key facts about HR3966

Bright giant

HR3966 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -21.7°
Azimuth: 182.8°
Direction: South

Celestial coordinates and finder chart of HR3966

HR3966 is situated south of the celestial equator, as such, it is more easily visible from the southern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR3966 are provided in the following table:

10h 02m 59s
-60° 10’ 42”

The simplified sky map below shows the position of HR3966 in the sky:

Finder chart HR3966 star
Simplified finder chart for HR3966.

Visibility of HR3966 from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

HR3966 is currently not visible from Greenwich, United Kingdom edit_location_alt

Distance of HR3966 from the Sun and relative movement

HR3966 is distant 3,227.72 light years from the Sun and it is moving towards the Sun at the speed of 4 kilometers per second.

990.10 pc
3,227.72 ly
-4 km/s
-0.013 arcsec/year
0.005 arcsec/year

Spectral properties of HR3966

HR3966 belongs to spectral class A6 and has a luminosity class of II corresponding to a bright giant star.


The red dot in the diagram below shows where HR3966 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR3966. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR3966