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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: 6:40  
clear_day Transit: 12:10  
SunsetSet: 17:41
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All Constellations » Carina » 


Altitude: -34.8°   Azimuth: 148.4°   Direction: South-South-East

HR3971 is a double sub-giant star in the constellation of Carina.

HR3971 visual magnitude is 6.14. Because of its reltive faintness, HR3971 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 HR3971 is -0.005 arcsec per year in Right Ascension and 0.005 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of HR3971 star
DSS2 image of HR3971. The red arrow shows the motion of HR3971 during the next 100000 years (-8.33 arcmin in Right Ascension and 8.33 arcmin in declination);

Key facts about HR3971


HR3971 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -34.8°
Azimuth: 148.4°
Direction: South-South-East

Celestial coordinates and finder chart of HR3971

HR3971 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 HR3971 are provided in the following table:

10h 03m 34s
-61° 53’ 02”

The simplified sky map below shows the position of HR3971 in the sky:

Finder chart HR3971 star
Simplified finder chart for HR3971.

Visibility of HR3971 from your location

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

HR3971 is currently not visible from Greenwich, United Kingdom edit_location_alt

Distance of HR3971 from the Sun and relative movement

HR3971 is distant 1,734.04 light years from the Sun and it is moving far from the Sun at the speed of 5 kilometers per second.

531.91 pc
1,734.04 ly
5 km/s
-0.005 arcsec/year
0.005 arcsec/year

Spectral properties of HR3971

HR3971 belongs to spectral class B7 and has a luminosity class of IV corresponding to a sub-giant star.


The red dot in the diagram below shows where HR3971 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR3971. Attribution: Richard Powell / CC BY-SA

HR3971 star system properties

HR3971 is a visual double star which can be observed with the help of large telescopes. The table below shows key information about the HR3971 double sysyem:

1.2 arcsec

Alternative designations of HR3971