Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 6:44  
clear_day Transit: 12:51  
SunsetSet: 18:57 south
sunny DaytimeWhat's Visible Now
All Constellations » Orion » 

φ2 Orionis (phi2 Orionis)

Altitude: 3.3°   Azimuth: 280.8°   Direction: West

φ2 Orionis is a hypergiant star in the constellation of Orion.

φ2 Orionis visual magnitude is 4.09. Because of its moderate brightness, φ2 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 φ2 Orionis:


φ2 Orionis (phi2 Orionis) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 3.3°
Azimuth: 280.8°
Direction: West

Celestial coordinates and finder chart of φ2 Orionis

φ2 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 φ2 Orionis are provided in the following table:

05h 36m 54s
+09° 17’ 26”

The simplified sky map below shows the position of φ2 Orionis in the sky:

Finder chart φ2 Orionis (phi2 Orionis) star
Simplified finder chart for φ2 Orionis (phi2 Orionis).

Visibility of φ2 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 φ2 Orionis (phi2 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: 80.7°
Max altitude: 47.8°
Azimuth: 279.3°

Digitized Sky Survey image of φ2 Orionis

The image below is a photograph of φ2 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 φ2 Orionis is 0.091 arcsec per year in Right Ascension and -0.305 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of φ2 Orionis (phi2 Orionis) star
DSS2 image of φ2 Orionis. The red arrow shows the motion of φ2 Orionis during the next 1000 years (1.52 arcmin in Right Ascension and -5.08 arcmin in declination);

Distance of φ2 Orionis from the Sun and relative movement

φ2 Orionis is distant 116.01 light years from the Sun and it is moving far from the Sun at the speed of 99 kilometers per second.

35.59 pc
116.01 ly
99 km/s
0.091 arcsec/year
-0.305 arcsec/year

Spectral properties of φ2 Orionis

φ2 Orionis belongs to spectral class K0 and has a luminosity class of III corresponding to a hypergiant star.


The red dot in the diagram below shows where φ2 Orionis is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of φ2 Orionis. Attribution: Richard Powell / CC BY-SA

Alternative designations of φ2 Orionis

φ2 Orionis
(phi2 Orionis)