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Tabit - π3 Orionis (pi3 Orionis)

Tabit, also designated as π3 Orionis (pi3 Orionis), is a variable and double main-sequence star in the constellation of Orion.

Tabit visual magnitude is 3.19. Because of its moderate brightness, Tabit 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 Tabit:

Color of Tabit ⬤

Magnitude of Tabit 3.19

Class Main-sequence

VISIBILITY RIGHT NOW Tabit - π3 Orionis (pi3 Orionis) is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of Tabit

Tabit 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 Tabit are provided in the following table:

Right Ascension J2000 04h 49m 50s

Declination J2000 +06° 57’ 41”

Galactic Longitude 191.45°

Galactic Latitude -23.07°

Constellation Orion

The simplified sky map below shows the position of Tabit in the sky:

Finder chart Tabit - π3 Orionis (pi3 Orionis) star

Simplified finder chart for Tabit - π3 Orionis (pi3 Orionis).

Visibility of Tabit from your location

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

Today's Tabit - π3 Orionis (pi3 Orionis) rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 83.0° RISE 10:41

Max altitude: 45.5° TRANSIT 17:14

Azimuth: 277.0° SET 23:47

RIGHT NOW Tabit - π3 Orionis (pi3 Orionis) is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of Tabit

The image below is a photograph of Tabit 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 Tabit is 0.466 arcsec per year in Right Ascension and 0.012 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of Tabit - π3 Orionis (pi3 Orionis) star

DSS2 image of Tabit. The red arrow shows the motion of Tabit during the next 1000 years (7.77 arcmin in Right Ascension and 0.20 arcmin in declination);

Distance of Tabit from the Sun and relative movement

Tabit is distant 26.16 light years from the Sun and it is moving far from the Sun at the speed of 24 kilometers per second.

Distance (parsec) 8.03 pc

Distance (light year) 26.16 ly

Heliocentric radial velocity 24 km/s

Proper Motion RA 0.466 arcsec/year

Proper Motion Dec 0.012 arcsec/year

Spectral properties of Tabit

Tabit belongs to spectral class F6 and has a luminosity class of V corresponding to a main-sequence star.

Absolute magnitude 3.67

Spectral Type F6V

Color Index (B-V) 0.45

Temperature of Tabit 6625K

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

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

Tabit star system properties

Tabit is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the Tabit double sysyem:

Main star magnitude 3.19

Secondary star magnitude 8.69

Magnitude difference 5.5

Separation 94.6 arcsec

Alternative designations of Tabit

Proper Name Tabit

Bayer designation π3 Orionis
(pi3 Orionis)

Flamsteed designation 1 Orionis

Henry Draper Catalogue HD30652

SAO Catalogue SAO112106

Hipparcos Catalogue HIP22449

Durchmusterung Catalogue BD+06 762

Gliese Catalogue Gl 178

FK5 Catalogue 1134

General Catalogue of Variable Stars 1731

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