We use cookies to deliver essential features and to measure their performance. By using this site you accept our Privacy Policies.
A Complete Guide to the Solar System and the Night Sky
Donate now and help us to keep this site free and ad-free!
public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:48  
clear_day Transit: 11:49  
SunsetSet: 15:50 south
sleep NighttimeWhat's Visible Now?
All Constellations » Hydra » 


Altitude: -39.7°   Azimuth: 90.0°   Direction: East

HR4331 is a main-sequence star in the constellation of Hydra.

HR4331 visual magnitude is 6.49. Because of its reltive faintness, HR4331 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 HR4331:


HR4331 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -39.7°
Azimuth: 90.0°
Direction: East

Celestial coordinates and finder chart of HR4331

HR4331 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 HR4331 are provided in the following table:

11h 08m 15s
-29° 58’ 22”

The simplified sky map below shows the position of HR4331 in the sky:

Finder chart HR4331 star
Simplified finder chart for HR4331.

Visibility of HR4331 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 HR4331 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: 120.0°
Max altitude: 8.5°
Azimuth: 240.0°

Digitized Sky Survey image of HR4331

The image below is a photograph of HR4331 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 HR4331 is 0.008 arcsec per year in Right Ascension and -0.02 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR4331 star
DSS2 image of HR4331. The red arrow shows the motion of HR4331 during the next 10000 years (1.33 arcmin in Right Ascension and -3.33 arcmin in declination);

Distance of HR4331 from the Sun and relative movement

HR4331 is distant 457.22 light years from the Sun and it is moving towards the Sun at the speed of 13 kilometers per second.

140.25 pc
457.22 ly
-13 km/s
0.008 arcsec/year
-0.02 arcsec/year

Spectral properties of HR4331

HR4331 belongs to spectral class A1 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where HR4331 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR4331. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR4331