55 Orionis

Below the horizon. Rise: 6:10 | Tran: 11:45 | Set: 17:24

Alt: -47.68° Az: 306.61° Direction: North-West

55 Orionis is a variable sub-giant star of spectral class B2 in the constellation of Orion.

55 Orionis visual magnitude is 5.35. Because of its faintness, 55 Orionis is visible to the naked eye only from locations with very dark skies, while it is not visible at all from skies affected by light pollution.

DSS2 image of 55 Orionis. The red arrow shows the motion of 55 Orionis during the next 100000 years (-1.67 arcmin in Right Ascension and 5.00 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 05h 52m 35s

Declination -07° 30’ 47”

Hour Angle 09h 47m 51s

Sidereal Time 15h 40m 27s

J2000

Right Ascension 05h 51m 21s

Declination -07° 31’ 05”

Galactic Coordinates

Galactic Longitude 212.89°

Galactic Latitude -16.76°

Finder Chart

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Finder chart for 55 Orionis.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.35

Class Sub-giant

Absolute magnitude -3.21

Spectral Type B2IV

Color Index (B-V) -0.2

Temperature 13585K

The red dot in the diagram below shows where 55 Orionis is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 55 Orionis. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

55 Orionis is distant 1,680.41 light years from the Sun and it is moving far from the Sun at the speed of 20 kilometers per second.

Distance (parsec) 515.46

Distance (light year) 1,680.41

Radial Speed 20 km/s

Proper Motion RA -0.001 arcsec/y

Proper Motion Dec 0.003"/y

Alternative Designations

Flamsteed designation 55 Orionis

Henry Draper Catalogue HD39291

SAO Catalogue SAO132591

Hipparcos Catalogue HIP27658

Durchmusterung Catalogue BD-07 1187

FK5 Catalogue 2442

General Catalogue of Variable Stars 2677

Visibility from Your Location

Today's 55 Orionis rise, transit and set times from Palo Alto, United States are the following (all times relative to the local timezone America/Los_Angeles):

Azimuth: 97.5° RISE 6:10

Max altitude: 45.0° TRANSIT 11:45

Azimuth: 262.5° SET 17:24

Name:	Palo Alto, United States
Latitude:	37° 26' 30.8" N
Longitude:	122° 8' 34.8" W
Timezone:	America/Los_Angeles

Set Location

Other stars in Orion