23 Orionis

Altitude: -32.5° Azimuth: 23.6° Direction: North-North-East

23 Orionis is a double main-sequence star in the constellation of Orion.

23 Orionis visual magnitude is 5. Because of its moderate brightness, 23 Orionis should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The table below summarizes the key facts about 23 Orionis:

Color of 23 Orionis ⬤

Magnitude of 23 Orionis 5

Class Main-sequence

VISIBILITY RIGHT NOW

23 Orionis is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -32.5°
Azimuth: 23.6°
Direction: North-North-East

Celestial coordinates and finder chart of 23 Orionis

23 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 23 Orionis are provided in the following table:

Right Ascension J2000 05h 22m 50s

Declination J2000 +03° 32’ 39”

Galactic Longitude 199.16°

Galactic Latitude -17.86°

Constellation Orion

The simplified sky map below shows the position of 23 Orionis in the sky:

Simplified finder chart for 23 Orionis.

Visibility of 23 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 23 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: 86.5° RISE 18:36

Max altitude: 42.1° TRANSIT 0:56

Azimuth: 273.5° SET 7:11

Digitized Sky Survey image of 23 Orionis

The image below is a photograph of 23 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 23 Orionis is -0.004 arcsec per year in Right Ascension and -0.002 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

DSS2 image of 23 Orionis. The red arrow shows the motion of 23 Orionis during the next 100000 years (-6.67 arcmin in Right Ascension and -3.33 arcmin in declination);

Distance of 23 Orionis from the Sun and relative movement

23 Orionis is distant 961.65 light years from the Sun and it is moving far from the Sun at the speed of 18 kilometers per second.

Distance (parsec) 294.99 pc

Distance (light year) 961.65 ly

Heliocentric radial velocity 18 km/s

Proper Motion RA -0.004 arcsec/year

Proper Motion Dec -0.002 arcsec/year

Spectral properties of 23 Orionis

23 Orionis belongs to spectral class B1 and has a luminosity class of V corresponding to a main-sequence star.

Absolute magnitude -2.35

Spectral Type B1V

Color Index (B-V) -0.15

Temperature of 23 Orionis 12489K

The red dot in the diagram below shows where 23 Orionis is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 23 Orionis. Attribution: Richard Powell / CC BY-SA

23 Orionis star system properties

23 Orionis is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the 23 Orionis double sysyem:

Main star magnitude 5

Secondary star magnitude 7.2

Magnitude difference 2.2

Separation 31.9 arcsec

Alternative designations of 23 Orionis

Flamsteed designation 23 Orionis

Henry Draper Catalogue HD35149

SAO Catalogue SAO112697

Hipparcos Catalogue HIP25142

Durchmusterung Catalogue BD+03 871

Aitken Double Star Catalogue ADS3962

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In Evidence

Other stars in Orion