Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 4:47  
clear_day Transit: 12:56  
SunsetSet: 21:06 south
sunny DaytimeWhat's Visible Now
All Constellations » Hydra » 


HR3965 is a main-sequence star in the constellation of Hydra.

HR3965 visual magnitude is 5.7. Because of its reltive faintness, HR3965 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 HR3965:

HR3965 is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 11°.

Celestial coordinates and finder chart of HR3965

HR3965 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 HR3965 are provided in the following table:

10h 04m 20s
-24° 17’ 08”

The simplified sky map below shows the position of HR3965 in the sky:

Finder chart HR3965 star
Simplified finder chart for HR3965.

Visibility of HR3965 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 HR3965 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: 114.3°
Max altitude: 14.2°
Azimuth: 245.7°
HR3965 is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR3965

The image below is a photograph of HR3965 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 HR3965 is -0.114 arcsec per year in Right Ascension and 0.023 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of HR3965 star
DSS2 image of HR3965. The red arrow shows the motion of HR3965 during the next 1000 years (-1.90 arcmin in Right Ascension and 0.38 arcmin in declination);

Distance of HR3965 from the Sun and relative movement

HR3965 is distant 255.49 light years from the Sun and it is moving far from the Sun at the speed of 4 kilometers per second.

78.37 pc
255.49 ly
4 km/s
-0.114 arcsec/year
0.023 arcsec/year

Spectral properties of HR3965

HR3965 belongs to spectral class A8 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where HR3965 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR3965. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR3965