φ1 Lupi (phi1 Lupi)

Below the horizon. Rise: 21:52 | Tran: 23:21 | Set: 0:50

Alt: -9.96° Az: 138.22° Direction: South-East

φ1 Lupi is a multiple giant star of spectral class K5 in the constellation of Lupus.

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

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);

Celestial Coordinates

Apparent

Right Ascension 15h 23m 25s

Declination -36° 21’ 04”

Hour Angle 20h 21m 43s

Sidereal Time 11h 45m 09s

J2000

Right Ascension 15h 21m 48s

Declination -36° 15’ 41”

Galactic Coordinates

Galactic Longitude 333.96°

Galactic Latitude 17.39°

Finder Chart

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Finder chart for φ1 Lupi (phi1 Lupi).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 3.56

Class Giant

Absolute magnitude -1.44

Spectral Type K5III

Color Index (B-V) 1.54

Temperature 3734K

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

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

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:

Main star magnitude 3.56

Secondary star magnitude 14.46

Magnitude difference 10.9

Separation 17.3 arcsec

Distance, Radial Speed, Proper Motion

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.

Distance (parsec) 100.10

Distance (light year) 326.33

Radial Speed -29 km/s

Proper Motion RA -0.089 arcsec/y

Proper Motion Dec -0.084"/y

Alternative Designations

Bayer designation φ1 Lupi
(phi1 Lupi)

Henry Draper Catalogue HD136422

SAO Catalogue SAO206552

Hipparcos Catalogue HIP75177

Durchmusterung Catalogue CD-3510236

FK5 Catalogue 566

Visibility from Your Location

Today's φ1 Lupi (phi1 Lupi) rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 126.4° RISE 21:52

Max altitude: 2.2° TRANSIT 23:21

Azimuth: 233.6° SET 0:50

Set Location

Other stars in Lupus