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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: 7:54  
clear_day Transit: 11:51  
SunsetSet: 15:49 south
wb_twilight Nautical TwilightWhat's Visible Now?
All Constellations » Hydra » 


Altitude: 7.9°   Azimuth: 209.8°   Direction: South-South-West

HR3962 is a double hypergiant star in the constellation of Hydra.

HR3962 visual magnitude is 6.7. Because of its reltive faintness, HR3962 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 HR3962:


HR3962 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 7.9°
Azimuth: 209.8°
Direction: South-South-West

Celestial coordinates and finder chart of HR3962

HR3962 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 HR3962 are provided in the following table:

10h 03m 41s
-25° 19’ 00”

The simplified sky map below shows the position of HR3962 in the sky:

Finder chart HR3962 star
Simplified finder chart for HR3962.

Visibility of HR3962 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 HR3962 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: 115.3°
Max altitude: 13.2°
Azimuth: 244.7°

Digitized Sky Survey image of HR3962

The image below is a photograph of HR3962 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 HR3962 is -0.039 arcsec per year in Right Ascension and 0.009 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR3962 star
DSS2 image of HR3962. The red arrow shows the motion of HR3962 during the next 10000 years (-6.50 arcmin in Right Ascension and 1.50 arcmin in declination);

Distance of HR3962 from the Sun and relative movement

HR3962 is distant 636.72 light years from the Sun and it is moving far from the Sun at the speed of 12 kilometers per second.

195.31 pc
636.72 ly
12 km/s
-0.039 arcsec/year
0.009 arcsec/year

Spectral properties of HR3962

HR3962 belongs to spectral class A0 and has a luminosity class of III corresponding to a hypergiant star.


The red dot in the diagram below shows where HR3962 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR3962. Attribution: Richard Powell / CC BY-SA

HR3962 star system properties

HR3962 is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the HR3962 double sysyem:

16.1 arcsec

Alternative designations of HR3962