57 Orionis

57 Orionis is a variable and double main-sequence star in the constellation of Orion.

57 Orionis visual magnitude is 5.92. Because of its reltive faintness, 57 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 57 Orionis:

Color of 57 Orionis ⬤

Magnitude of 57 Orionis 5.92

Class Main-sequence

VISIBILITY RIGHT NOW 57 Orionis is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 23°.

Celestial coordinates and finder chart of 57 Orionis

57 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 57 Orionis are provided in the following table:

Right Ascension J2000 05h 54m 56s

Declination J2000 +19° 44’ 58”

Galactic Longitude 188.98°

Galactic Latitude -2.88°

Constellation Orion

The simplified sky map below shows the position of 57 Orionis in the sky:

Simplified finder chart for 57 Orionis.

Visibility of 57 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 57 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: 70.3° RISE 6:31

Max altitude: 58.3° TRANSIT 14:15

Azimuth: 289.7° SET 22:00

RIGHT NOW 57 Orionis is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 57 Orionis

The image below is a photograph of 57 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 57 Orionis is -0.003 arcsec per year in Right Ascension and -0.004 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

DSS2 image of 57 Orionis. The red arrow shows the motion of 57 Orionis during the next 100000 years (-5.00 arcmin in Right Ascension and -6.67 arcmin in declination);

Distance of 57 Orionis from the Sun and relative movement

57 Orionis is distant 1,405.17 light years from the Sun and it is moving far from the Sun at the speed of 7 kilometers per second.

Distance (parsec) 431.03 pc

Distance (light year) 1,405.17 ly

Heliocentric radial velocity 7 km/s

Proper Motion RA -0.003 arcsec/year

Proper Motion Dec -0.004 arcsec/year

Spectral properties of 57 Orionis

57 Orionis belongs to spectral class B2 and has a luminosity class of V corresponding to a main-sequence star.

Absolute magnitude -2.25

Spectral Type B2V

Color Index (B-V) -0.17

Temperature of 57 Orionis 12902K

The red dot in the diagram below shows where 57 Orionis is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 57 Orionis. Attribution: Richard Powell / CC BY-SA

57 Orionis star system properties

57 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 57 Orionis double sysyem:

Main star magnitude 5.92

Secondary star magnitude 8.12

Magnitude difference 2.2

Separation 0 arcsec

Alternative designations of 57 Orionis

Flamsteed designation 57 Orionis

Henry Draper Catalogue HD39698

SAO Catalogue SAO94986

Hipparcos Catalogue HIP27965

Durchmusterung Catalogue BD+19 1126

FK5 Catalogue 2447

General Catalogue of Variable Stars 2722

In Evidence

Other stars in Orion