Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 4:50  
clear_day Transit: 12:56  
SunsetSet: 21:02 south
sunny DaytimeWhat's Visible Now
All Constellations » Lupus » 

θ Lupi (theta Lupi)

θ Lupi is a main-sequence star in the constellation of Lupus.

θ Lupi visual magnitude is 4.23. Because of its moderate brightness, θ Lupi should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The table below summarizes the key facts about θ Lupi:

θ Lupi (theta Lupi) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Celestial coordinates and finder chart of θ Lupi

θ Lupi 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 θ Lupi are provided in the following table:

16h 06m 35s
-36° 48’ 07”

The simplified sky map below shows the position of θ Lupi in the sky:

Finder chart θ Lupi (theta Lupi) star
Simplified finder chart for θ Lupi (theta Lupi).

Visibility of θ Lupi 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 θ Lupi (theta Lupi) 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: 126.8°
Max altitude: 1.7°
Azimuth: 233.2°
θ Lupi (theta Lupi) is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of θ Lupi

The image below is a photograph of θ Lupi from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). The proper motion of θ Lupi is -0.017 arcsec per year in Right Ascension and -0.029 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of θ Lupi (theta Lupi) star
DSS2 image of θ Lupi. The red arrow shows the motion of θ Lupi during the next 10000 years (-2.83 arcmin in Right Ascension and -4.83 arcmin in declination);

Distance of θ Lupi from the Sun and relative movement

θ Lupi is distant 410.58 light years from the Sun and it is moving far from the Sun at the speed of 15 kilometers per second.

125.94 pc
410.58 ly
15 km/s
-0.017 arcsec/year
-0.029 arcsec/year

Spectral properties of θ Lupi

θ Lupi belongs to spectral class B2 and has a luminosity class of V corresponding to a main-sequence star.


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

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

Alternative designations of θ Lupi

θ Lupi
(theta Lupi)