η Leonis (eta Leonis)

Below the horizon. Rise: 12:15 | Tran: 19:41 | Set: 3:11

Alt: -21.88° Az: 359.18° Direction: North

η Leonis is a variable and double hypergiant star of spectral class A0 in the constellation of Leo.

η Leonis visual magnitude is 3.52. Because of its moderate brightness, η 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 η Leonis. The red arrow shows the motion of η Leonis during the next 100000 years (-3.33 arcmin in Right Ascension and 0.00 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 10h 08m 42s

Declination +16° 38’ 17”

Hour Angle 11h 56m 49s

Sidereal Time 22h 05m 31s

J2000

Right Ascension 10h 07m 19s

Declination +16° 45’ 46”

Galactic Coordinates

Galactic Longitude 219.53°

Galactic Latitude 50.75°

Finder Chart

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Finder chart for η Leonis (eta Leonis).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 3.52

Class Hypergiant

Absolute magnitude -5.56

Spectral Type A0I

Color Index (B-V) -0.03

Temperature 10516K

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

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

Star System Properties

η 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 η Leonis double sysyem:

Main star magnitude 3.52

Secondary star magnitude 4.02

Magnitude difference 0.5

Separation 0.1 arcsec

Distance, Radial Speed, Proper Motion

η Leonis is distant 2,130.72 light years from the Sun and it is moving far from the Sun at the speed of 3 kilometers per second.

Distance (parsec) 653.59

Distance (light year) 2,130.72

Radial Speed 3 km/s

Proper Motion RA -0.002 arcsec/y

Alternative Designations

Bayer designation η Leonis
(eta Leonis)

Flamsteed designation 30 Leonis

Henry Draper Catalogue HD87737

SAO Catalogue SAO98955

Hipparcos Catalogue HIP49583

Durchmusterung Catalogue BD+17 2171

FK5 Catalogue 379

General Catalogue of Variable Stars 4738

Visibility from Your Location

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

Azimuth: 73.4° RISE 12:15

Max altitude: 55.2° TRANSIT 19:41

Azimuth: 286.6° SET 3:11

Set Location

Other stars in Leo