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public LocationGreenwich, United Kingdom
Sunrise: 4:42 
Transit: 13:00 
Sunset: 21:17
sunny   (Daytime)   What's Visible Now?


Below the horizon.  Never rises today
Altitude: -79.8°   Azimuth: 172.9°   Direction: South

HR3999 is a variable giant star of spectral class M2 in the constellation of Carina.

HR3999 visual magnitude is 5.6. Because of its faintness, HR3999 is visible to the naked eye only from locations with very dark skies, while it is not visible at all from skies affected by light pollution.

Celestial coordinates and finder chart of HR3999

Finder chart HR3999 star
Simplified finder chart for HR3999.

HR3999 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 HR3999 are provided in the following table:

10h 09m 21s
-61° 32’ 57”
Image of HR3999 star
DSS2 image of HR3999. The red arrow shows the motion of HR3999 during the next 1000 years (-1.57 arcmin in Right Ascension and 1.22 arcmin in declination);

Key facts about HR3999


and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR3999 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR3999. Attribution: Richard Powell / CC BY-SA

Distance of HR3999 from the Sun and relative movement

HR3999 is distant 1,319.84 light years from the Sun and it is moving far from the Sun at the speed of 289 kilometers per second.

404.86 pc
1,319.84 ly
289 km/s
-0.094 arcsec/year
0.073 arcsec/year

Alternative designations of HR3999


Visibility of HR3999 from your location

HR3999 is currently not visible from Greenwich, United Kingdom