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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 6:46  
clear_day Transit: 12:51  
SunsetSet: 18:55 south
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All Constellations » Lupus » 

φ1 Lupi (phi1 Lupi)

Altitude: -71.7°   Azimuth: 39.5°   Direction: North-East

φ1 Lupi is a multiple giant star in the constellation of Lupus.

φ1 Lupi visual magnitude is 3.56. Because of its moderate brightness, φ1 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 φ1 Lupi:


φ1 Lupi (phi1 Lupi) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -71.7°
Azimuth: 39.5°
Direction: North-East

Celestial coordinates and finder chart of φ1 Lupi

φ1 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 φ1 Lupi are provided in the following table:

15h 21m 48s
-36° 15’ 41”

The simplified sky map below shows the position of φ1 Lupi in the sky:

Finder chart φ1 Lupi (phi1 Lupi) star
Simplified finder chart for φ1 Lupi (phi1 Lupi).

Visibility of φ1 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 φ1 Lupi (phi1 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: 126.3°
Max altitude: 2.3°
Azimuth: 233.7°

Digitized Sky Survey image of φ1 Lupi

The image below is a photograph of φ1 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 φ1 Lupi is -0.089 arcsec per year in Right Ascension and -0.084 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of φ1 Lupi (phi1 Lupi) star
DSS2 image of φ1 Lupi. The red arrow shows the motion of φ1 Lupi during the next 10000 years (-14.83 arcmin in Right Ascension and -14.00 arcmin in declination);

Distance of φ1 Lupi from the Sun and relative movement

φ1 Lupi is distant 326.33 light years from the Sun and it is moving towards the Sun at the speed of 29 kilometers per second.

100.10 pc
326.33 ly
-29 km/s
-0.089 arcsec/year
-0.084 arcsec/year

Spectral properties of φ1 Lupi

φ1 Lupi belongs to spectral class K5 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where φ1 Lupi is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of φ1 Lupi. Attribution: Richard Powell / CC BY-SA

φ1 Lupi star system properties

φ1 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 φ1 Lupi double sysyem:

17.3 arcsec

Alternative designations of φ1 Lupi

φ1 Lupi
(phi1 Lupi)