Alterf - λ Leonis (lambda Leonis)

Below the horizon. Rise: 8:55 | Tran: 17:00 | Set: 1:09

Alt: -2.12° Az: 312.11° Direction: North-West

Alterf, also designated as λ Leonis (lambda Leonis), is a variable giant star of spectral class K5 in the constellation of Leo.

Alterf visual magnitude is 4.31. Because of its moderate brightness, Alterf 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 Alterf - λ Leonis (lambda Leonis) star

DSS2 image of Alterf. The red arrow shows the motion of Alterf during the next 10000 years (-3.50 arcmin in Right Ascension and -5.50 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 09h 33m 10s

Declination +22° 51’ 17”

Hour Angle 08h 25m 45s

Sidereal Time 17h 58m 55s

J2000

Right Ascension 09h 31m 43s

Declination +22° 58’ 05”

Galactic Coordinates

Galactic Longitude 206.69°

Galactic Latitude 44.86°

Finder Chart

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Finder chart for Alterf - λ Leonis (lambda Leonis).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 4.31

Class Giant

Absolute magnitude -0.76

Spectral Type K5III

Color Index (B-V) 1.54

Temperature 3734K

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

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

Distance, Radial Speed, Proper Motion

Alterf is distant 336.43 light years from the Sun and it is moving far from the Sun at the speed of 27 kilometers per second.

Distance (parsec) 103.20

Distance (light year) 336.43

Radial Speed 27 km/s

Proper Motion RA -0.021 arcsec/y

Proper Motion Dec -0.033"/y

Alternative Designations

Proper Name Alterf

Bayer designation λ Leonis
(lambda Leonis)

Flamsteed designation 4 Leonis

Henry Draper Catalogue HD82308

SAO Catalogue SAO80885

Hipparcos Catalogue HIP46750

Durchmusterung Catalogue BD+23 2107

FK5 Catalogue 2756

General Catalogue of Variable Stars 4514

Visibility from Your Location

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

Azimuth: 67.1° RISE 8:55

Max altitude: 61.4° TRANSIT 17:00

Azimuth: 292.9° SET 1:09

Set Location

Other stars in Leo