π5 Orionis (pi5 Orionis)

π5 Orionis is a variable giant star in the constellation of Orion.

π5 Orionis visual magnitude is 3.72. Because of its moderate brightness, π5 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 π5 Orionis:

Color of π5 Orionis ⬤

Magnitude of π5 Orionis 3.72

Class Giant

VISIBILITY RIGHT NOW π5 Orionis (pi5 Orionis) is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of π5 Orionis

π5 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 π5 Orionis are provided in the following table:

Right Ascension J2000 04h 54m 15s

Declination J2000 +02° 26’ 26”

Galactic Longitude 196.27°

Galactic Latitude -24.56°

Constellation Orion

The simplified sky map below shows the position of π5 Orionis in the sky:

Finder chart π5 Orionis (pi5 Orionis) star

Simplified finder chart for π5 Orionis (pi5 Orionis).

Visibility of π5 Orionis from your location

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

Today's π5 Orionis (pi5 Orionis) rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 87.6° RISE 11:24

Max altitude: 41.0° TRANSIT 17:34

Azimuth: 272.4° SET 23:45

RIGHT NOW π5 Orionis (pi5 Orionis) is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of π5 Orionis

The image below is a photograph of π5 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 π5 Orionis is 0 arcsec per year in Right Ascension and 0 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

DSS2 image of π5 Orionis. The red arrow shows the motion of π5 Orionis during the next 100000 years (0.00 arcmin in Right Ascension and 0.00 arcmin in declination);

Distance of π5 Orionis from the Sun and relative movement

π5 Orionis is distant 1,341.56 light years from the Sun and it is moving far from the Sun at the speed of 23 kilometers per second.

Distance (parsec) 411.52 pc

Distance (light year) 1,341.56 ly

Heliocentric radial velocity 23 km/s

Spectral properties of π5 Orionis

π5 Orionis belongs to spectral class B3 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude -4.35

Spectral Type B3III

Color Index (B-V) -0.18

Temperature of π5 Orionis 13121K

The red dot in the diagram below shows where π5 Orionis is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of π5 Orionis. Attribution: Richard Powell / CC BY-SA

Alternative designations of π5 Orionis

Bayer designation π5 Orionis
(pi5 Orionis)

Flamsteed designation 8 Orionis

Henry Draper Catalogue HD31237

SAO Catalogue SAO112197

Hipparcos Catalogue HIP22797

Durchmusterung Catalogue BD+02 810

FK5 Catalogue 180

General Catalogue of Variable Stars Pi5 Ori

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In Evidence

Other stars in Orion