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🌎 Location: Greenwich, United Kingdom [change]

π4 Orionis (pi4 Orionis)

π4 Orionis is a variable giant star in the constellation of Orion.

π4 Orionis visual magnitude is 3.69. Because of its moderate brightness, π4 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 π4 Orionis:

3.69
Giant
π4 Orionis (pi4 Orionis) is above the horizon from Greenwich, United Kingdom [change]. Altitude: 24°.

Celestial coordinates and finder chart of π4 Orionis

π4 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 π4 Orionis are provided in the following table:

04h 51m 12s
+05° 36’ 18”
192.89°
-23.52°
Orion

The simplified sky map below shows the position of π4 Orionis in the sky:

Finder chart π4 Orionis (pi4 Orionis) star
Simplified finder chart for π4 Orionis (pi4 Orionis).

Visibility of π4 Orionis from your location

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

Today's π4 Orionis (pi4 Orionis) rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 84.4°
Max altitude: 44.1°
Azimuth: 275.6°
π4 Orionis (pi4 Orionis) is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of π4 Orionis

The image below is a photograph of π4 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 π4 Orionis is -0.001 arcsec per year in Right Ascension and 0.001 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of π4 Orionis (pi4 Orionis) star
DSS2 image of π4 Orionis. The red arrow shows the motion of π4 Orionis during the next 100000 years (-1.67 arcmin in Right Ascension and 1.67 arcmin in declination);

Distance of π4 Orionis from the Sun and relative movement

π4 Orionis is distant 1,258.69 light years from the Sun and it is moving far from the Sun at the speed of 23 kilometers per second.

386.10 pc
1,258.69 ly
23 km/s
-0.001 arcsec/year
0.001 arcsec/year

Spectral properties of π4 Orionis

π4 Orionis belongs to spectral class B2 and has a luminosity class of III corresponding to a giant star.

-4.24
B2III
12902K

The red dot in the diagram below shows where π4 Orionis is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of π4 Orionis. Attribution: Richard Powell / CC BY-SA

Alternative designations of π4 Orionis

π4 Orionis
(pi4 Orionis)
SAO112142
SAO112142