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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: 7:44  
clear_day Transit: 11:48  
SunsetSet: 15:51 south
wb_twilight Nautical TwilightWhat's Visible Now?
All Constellations » Hydra » 


Altitude: -56.4°   Azimuth: 351.3°   Direction: North

HR3963 is a multiple hypergiant star in the constellation of Hydra.

HR3963 visual magnitude is 5.86. Because of its reltive faintness, HR3963 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 HR3963:


HR3963 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -56.4°
Azimuth: 351.3°
Direction: North

Celestial coordinates and finder chart of HR3963

HR3963 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 HR3963 are provided in the following table:

10h 04m 02s
-18° 06’ 06”

The simplified sky map below shows the position of HR3963 in the sky:

Finder chart HR3963 star
Simplified finder chart for HR3963.

Visibility of HR3963 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 HR3963 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: 108.1°
Max altitude: 20.4°
Azimuth: 251.9°

Digitized Sky Survey image of HR3963

The image below is a photograph of HR3963 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 HR3963 is -0.01 arcsec per year in Right Ascension and -0.002 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR3963 star
DSS2 image of HR3963. The red arrow shows the motion of HR3963 during the next 10000 years (-1.67 arcmin in Right Ascension and -0.33 arcmin in declination);

Distance of HR3963 from the Sun and relative movement

HR3963 is distant 477.31 light years from the Sun and it is moving far from the Sun at the speed of 19 kilometers per second.

146.41 pc
477.31 ly
19 km/s
-0.01 arcsec/year
-0.002 arcsec/year

Spectral properties of HR3963

HR3963 belongs to spectral class A0 and has a luminosity class of V corresponding to a hypergiant star.


The red dot in the diagram below shows where HR3963 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR3963. Attribution: Richard Powell / CC BY-SA

HR3963 star system properties

HR3963 is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the HR3963 double sysyem:

21.2 arcsec

Alternative designations of HR3963