18 Orionis

Below the horizon. Rise: 6:59 | Tran: 13:56 | Set: 20:52

Alt: -11.83° Az: 305.91° Direction: North-West

18 Orionis is a hypergiant star of spectral class A0 in the constellation of Orion.

18 Orionis visual magnitude is 5.56. Because of its faintness, 18 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 18 Orionis. The red arrow shows the motion of 18 Orionis during the next 100000 years (-15.00 arcmin in Right Ascension and -8.33 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 05h 17m 28s

Declination +11° 22’ 04”

Hour Angle 08h 24m 09s

Sidereal Time 13h 41m 38s

J2000

Right Ascension 05h 16m 04s

Declination +11° 20’ 29”

Galactic Coordinates

Galactic Longitude 191.3°

Galactic Latitude -15.25°

Finder Chart

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Finder chart for 18 Orionis.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.56

Class Hypergiant

Absolute magnitude 0.30

Spectral Type A0V

Color Index (B-V) -0.04

Temperature 10653K

The red dot in the diagram below shows where 18 Orionis is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 18 Orionis. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

18 Orionis is distant 367.95 light years from the Sun and it is moving towards the Sun at the speed of 8 kilometers per second.

Distance (parsec) 112.87

Distance (light year) 367.95

Radial Speed -8 km/s

Proper Motion RA -0.009 arcsec/y

Proper Motion Dec -0.005"/y

Alternative Designations

Flamsteed designation 18 Orionis

Henry Draper Catalogue HD34203

SAO Catalogue SAO94426

Hipparcos Catalogue HIP24555

Durchmusterung Catalogue BD+11 756

FK5 Catalogue 2395

Visibility from Your Location

Today's 18 Orionis rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 78.6° RISE 6:59

Max altitude: 49.9° TRANSIT 13:56

Azimuth: 281.4° SET 20:52

Set Location

Other stars in Orion