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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
SunriseRise: 5:43  
clear_day Transit: 12:56  
SunsetSet: 20:10
sunny DaytimeWhat's Visible Now?
All Constellations » Vela » 


Altitude: -89.4°   Azimuth: 121.1°   Direction: East-South-East

HR3990 is a sub-giant star in the constellation of Vela.

HR3990 visual magnitude is 4.86. Because of its moderate brightness, HR3990 should be easily visible from locations with dark skies, while it can be barely visible, or not visible at all, from skies affected by light pollution.

The proper motion of HR3990 is -0.01 arcsec per year in Right Ascension and 0.001 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR3990 star
DSS2 image of HR3990. The red arrow shows the motion of HR3990 during the next 10000 years (-1.67 arcmin in Right Ascension and 0.17 arcmin in declination);

Key facts about HR3990


HR3990 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -89.4°
Azimuth: 121.1°
Direction: East-South-East

Celestial coordinates and finder chart of HR3990

HR3990 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 HR3990 are provided in the following table:

10h 08m 56s
-51° 48’ 39”

The simplified sky map below shows the position of HR3990 in the sky:

Finder chart HR3990 star
Simplified finder chart for HR3990.

Visibility of HR3990 from your location

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

HR3990 is currently not visible from Greenwich, United Kingdom edit_location_alt

Distance of HR3990 from the Sun and relative movement

HR3990 is distant 1,083.06 light years from the Sun and it is moving far from the Sun at the speed of 14 kilometers per second.

332.23 pc
1,083.06 ly
14 km/s
-0.01 arcsec/year
0.001 arcsec/year

Spectral properties of HR3990

HR3990 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 HR3990 is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of HR3990. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR3990