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public  Greenwich, UK Greenwich, UK  ⓘ
Timezone: Europe/London
Sunrise: 5:05 
Transit: 12:56 
Sunset: 20:48
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In Evidence

New Comet C/2025 J1 (Borisov) Discovered in May 2025
Detailed information about the discovery of Comet C/2025 J1 (Borisov) and pointers to useful resources to track and observe it. Read more...

Other stars in Lupus
All Constellations » Lupus » 

λ Lupi (lambda Lupi)

Below the horizon.  Never rises today
Alt: -24.32°   Az: 133.34°   Direction: South-East

λ Lupi is a double main-sequence star of spectral class B3 in the constellation of Lupus.

λ Lupi visual magnitude is 4.05. Because of its moderate brightness, λ Lupi is easily visible to the naked eye from locations with dark skies, while it might be barely visible, or not visible at all, from light-polluted skies.

Image of λ Lupi (lambda Lupi) star
DSS2 image of λ Lupi. The red arrow shows the motion of λ Lupi during the next 10000 years (-2.67 arcmin in Right Ascension and -3.17 arcmin in declination);

Celestial Coordinates

Apparent

15h 10m 33s
-45° 22’ 31”
19h 17m 26s
10h 28m 00s

J2000

15h 08m 50s
-45° 16’ 46”

Galactic Coordinates

326.8°
11.13°

Finder Chart

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Finder chart for λ Lupi (lambda Lupi).

Magnitude, Color, Spectral Class

⬤
4.05
Main-sequence

-1.43
B3V
-0.18
13121K

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

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

Star System Properties

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

4.05
4.25
0.2
0.4 arcsec

Distance, Radial Speed, Proper Motion

λ Lupi is distant 406.48 light years from the Sun and it is moving far from the Sun at the speed of 10 kilometers per second.

124.69
406.48
10 km/s
-0.016 arcsec/y
-0.019"/y

Alternative Designations

λ Lupi
(lambda Lupi)
HD133955
SAO225483
SAO225483
HIP74117
CD-44 9889

Visibility from Your Location

λ Lupi (lambda Lupi) is currently not visible from Greenwich, UK