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
Help keep this site free and ads-free! Donate Now!
public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
SunriseRise: 5:43  
clear_day Transit: 12:56  
SunsetSet: 20:10
sunny DaytimeWhat's Visible Now?
All Constellations » Vela » 


Altitude: -77.4°   Azimuth: 68.5°   Direction: East-North-East

HR3680 is a double main-sequence star in the constellation of Vela.

HR3680 visual magnitude is 6.25. Because of its reltive faintness, HR3680 should be visible only from locations with dark skies, while it is not visible at all from skies affected by light pollution.

The proper motion of HR3680 is -0.003 arcsec per year in Right Ascension and -0.01 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR3680 star
DSS2 image of HR3680. The red arrow shows the motion of HR3680 during the next 10000 years (-0.50 arcmin in Right Ascension and -1.67 arcmin in declination);

Key facts about HR3680


HR3680 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -77.4°
Azimuth: 68.5°
Direction: East-North-East

Celestial coordinates and finder chart of HR3680

HR3680 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 HR3680 are provided in the following table:

09h 15m 14s
-45° 33’ 20”

The simplified sky map below shows the position of HR3680 in the sky:

Finder chart HR3680 star
Simplified finder chart for HR3680.

Visibility of HR3680 from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

HR3680 is currently not visible from Greenwich, United Kingdom edit_location_alt

Distance of HR3680 from the Sun and relative movement

HR3680 is distant 1,811.11 light years from the Sun and it is moving far from the Sun at the speed of 33 kilometers per second.

555.56 pc
1,811.11 ly
33 km/s
-0.003 arcsec/year
-0.01 arcsec/year

Spectral properties of HR3680

HR3680 belongs to spectral class B8 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where HR3680 is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of HR3680. Attribution: Richard Powell / CC BY-SA

HR3680 star system properties

HR3680 is a visual double star which can be observed with the help of large telescopes. The table below shows key information about the HR3680 double sysyem:

0.8 arcsec

Alternative designations of HR3680