ρ Leonis (rho Leonis)

Above the horizon. Rise: 10:45 | Tran: 17:29 | Set: 0:14

Alt: 3.82° Az: 279.95° Direction: South-West

ρ Leonis is a variable and double supergiant star of spectral class B1 in the constellation of Leo.

ρ Leonis visual magnitude is 3.85. Because of its moderate brightness, ρ Leonis 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 ρ Leonis. The red arrow shows the motion of ρ Leonis during the next 100000 years (-11.67 arcmin in Right Ascension and -5.00 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 10h 34m 09s

Declination +09° 10’ 29”

Hour Angle 06h 21m 42s

Sidereal Time 16h 55m 51s

J2000

Right Ascension 10h 32m 48s

Declination +09° 18’ 24”

Galactic Coordinates

Galactic Longitude 234.89°

Galactic Latitude 52.77°

Finder Chart

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Finder chart for ρ Leonis (rho Leonis).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 3.85

Class Supergiant

Absolute magnitude -7.37

Spectral Type B1I

Color Index (B-V) -0.14

Temperature 12293K

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

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

Star System Properties

ρ Leonis 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 ρ Leonis double sysyem:

Main star magnitude 3.85

Secondary star magnitude 4.25

Magnitude difference 0.4

Separation 0 arcsec

Distance, Radial Speed, Proper Motion

ρ Leonis is distant 5,719.30 light years from the Sun and it is moving far from the Sun at the speed of 42 kilometers per second.

Distance (parsec) 1,754.39

Distance (light year) 5,719.30

Radial Speed 42 km/s

Proper Motion RA -0.007 arcsec/y

Proper Motion Dec -0.003"/y

Alternative Designations

Bayer designation ρ Leonis
(rho Leonis)

Flamsteed designation 47 Leonis

Henry Draper Catalogue HD91316

SAO Catalogue SAO118355

Hipparcos Catalogue HIP51624

Durchmusterung Catalogue BD+10 2166

FK5 Catalogue 396

General Catalogue of Variable Stars Rho Leo

Visibility from Your Location

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

Azimuth: 80.8° RISE 10:45

Max altitude: 47.7° TRANSIT 17:29

Azimuth: 279.2° SET 0:14

Set Location

Other stars in Leo