75 Orionis

Altitude: -18.0° Azimuth: 314.3° Direction: North-West

75 Orionis is a multiple main-sequence star in the constellation of Orion.

75 Orionis visual magnitude is 5.39. Because of its reltive faintness, 75 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 75 Orionis:

Color of 75 Orionis ⬤

Magnitude of 75 Orionis 5.39

Class Main-sequence

VISIBILITY RIGHT NOW

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

Altitude: -18.0°
Azimuth: 314.3°
Direction: North-West

Celestial coordinates and finder chart of 75 Orionis

75 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 75 Orionis are provided in the following table:

Right Ascension J2000 06h 17m 06s

Declination J2000 +09° 56’ 33”

Galactic Longitude 200.16°

Galactic Latitude -2.99°

Constellation Orion

The simplified sky map below shows the position of 75 Orionis in the sky:

Simplified finder chart for 75 Orionis.

Visibility of 75 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 75 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: 80.1° RISE 18:18

Max altitude: 48.5° TRANSIT 1:10

Azimuth: 279.9° SET 7:59

Digitized Sky Survey image of 75 Orionis

The image below is a photograph of 75 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 75 Orionis is 0.007 arcsec per year in Right Ascension and -0.061 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of 75 Orionis. The red arrow shows the motion of 75 Orionis during the next 10000 years (1.17 arcmin in Right Ascension and -10.17 arcmin in declination);

Distance of 75 Orionis from the Sun and relative movement

75 Orionis is distant 253.70 light years from the Sun and it is moving far from the Sun at the speed of 12 kilometers per second.

Distance (parsec) 77.82 pc

Distance (light year) 253.70 ly

Heliocentric radial velocity 12 km/s

Proper Motion RA 0.007 arcsec/year

Proper Motion Dec -0.061 arcsec/year

Spectral properties of 75 Orionis

75 Orionis belongs to spectral class A2 and has a luminosity class of V corresponding to a main-sequence star.

Absolute magnitude 0.93

Spectral Type A2V

Color Index (B-V) 0.1

Temperature of 75 Orionis 9028K

The red dot in the diagram below shows where 75 Orionis is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 75 Orionis. Attribution: Richard Powell / CC BY-SA

75 Orionis star system properties

75 Orionis 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 75 Orionis double sysyem:

Main star magnitude 5.39

Secondary star magnitude 5.59

Magnitude difference 0.2

Separation 0.1 arcsec

Alternative designations of 75 Orionis

Flamsteed designation 75 Orionis

Henry Draper Catalogue HD43525

SAO Catalogue SAO113675

Hipparcos Catalogue HIP29850

Durchmusterung Catalogue BD+09 1173

FK5 Catalogue 2480

Aitken Double Star Catalogue ADS4890

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In Evidence

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