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
Your support helps us pay the server bills » Donate
public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
SunriseRise: 7:01  
clear_day Transit: 12:12  
SunsetSet: 17:24
sleep NighttimeWhat's Visible Now?
All Constellations » Lepus » 


Altitude: -2.3°   Azimuth: 245.0°   Direction: West-South-West

HR1731 is a sub-giant star in the constellation of Lepus.

HR1731 visual magnitude is 6.56. Because of its reltive faintness, HR1731 should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The proper motion of HR1731 is -0.012 arcsec per year in Right Ascension and 0.022 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR1731 star
DSS2 image of HR1731. The red arrow shows the motion of HR1731 during the next 10000 years (-2.00 arcmin in Right Ascension and 3.67 arcmin in declination);

Key facts about HR1731


HR1731 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -2.3°
Azimuth: 245.0°
Direction: West-South-West

Celestial coordinates and finder chart of HR1731

HR1731 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 HR1731 are provided in the following table:

05h 16m 48s
-17° 08’ 30”

The simplified sky map below shows the position of HR1731 in the sky:

Finder chart HR1731 star
Simplified finder chart for HR1731.

Visibility of HR1731 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 HR1731 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: 107.1°
Max altitude: 21.4°
Azimuth: 252.9°

Distance of HR1731 from the Sun and relative movement

HR1731 is distant 1,448.89 light years from the Sun and it is moving far from the Sun at the speed of 12 kilometers per second.

444.44 pc
1,448.89 ly
12 km/s
-0.012 arcsec/year
0.022 arcsec/year

Spectral properties of HR1731

HR1731 belongs to spectral class B3 and has a luminosity class of IV corresponding to a sub-giant star.


The red dot in the diagram below shows where HR1731 is situated in the HertzsprungÔÇôRussell diagram.

HR Diagram
H-R diagram showing the position of HR1731. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR1731