73 Orionis

Altitude: 42.9° Azimuth: 226.3° Direction: South-West

73 Orionis is a bright giant star in the constellation of Orion.

73 Orionis visual magnitude is 5.33. Because of its reltive faintness, 73 Orionis should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about 73 Orionis:

Color of 73 Orionis ⬤

Magnitude of 73 Orionis 5.33

Class Bright giant

VISIBILITY RIGHT NOW

73 Orionis is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 42.9°
Azimuth: 226.3°
Direction: South-West

Celestial coordinates and finder chart of 73 Orionis

73 Orionis is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of 73 Orionis are provided in the following table:

Right Ascension J2000 06h 15m 45s

Declination J2000 +12° 33’ 03”

Galactic Longitude 197.71°

Galactic Latitude -2.04°

Constellation Orion

The simplified sky map below shows the position of 73 Orionis in the sky:

Simplified finder chart for 73 Orionis.

Visibility of 73 Orionis from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's 73 Orionis rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 77.4° RISE 23:30

Max altitude: 51.1° TRANSIT 6:36

Azimuth: 282.6° SET 13:39

Digitized Sky Survey image of 73 Orionis

The image below is a photograph of 73 Orionis from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). The proper motion of 73 Orionis is -0.001 arcsec per year in Right Ascension and 0.001 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

DSS2 image of 73 Orionis. The red arrow shows the motion of 73 Orionis during the next 100000 years (-1.67 arcmin in Right Ascension and 1.67 arcmin in declination);

Distance of 73 Orionis from the Sun and relative movement

73 Orionis is distant 1,399.14 light years from the Sun and it is moving far from the Sun at the speed of 13 kilometers per second.

Distance (parsec) 429.18 pc

Distance (light year) 1,399.14 ly

Heliocentric radial velocity 13 km/s

Proper Motion RA -0.001 arcsec/year

Proper Motion Dec 0.001 arcsec/year

Spectral properties of 73 Orionis

73 Orionis belongs to spectral class B9 and has a luminosity class of II corresponding to a bright giant star.

Absolute magnitude -2.83

Spectral Type B9II

Color Index (B-V) -0.02

Temperature of 73 Orionis 10382K

The red dot in the diagram below shows where 73 Orionis is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 73 Orionis. Attribution: Richard Powell / CC BY-SA

Alternative designations of 73 Orionis

Flamsteed designation 73 Orionis

Henry Draper Catalogue HD43247

SAO Catalogue SAO95457

Hipparcos Catalogue HIP29736

Durchmusterung Catalogue BD+12 1081

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In Evidence

Other stars in Orion