We use cookies to deliver essential features and to measure their performance. By using this site you accept our Privacy Policies.
Help keep this site free and ads-free: donate now!
public LocationGreenwich, UK
Sunrise: 4:42 
Transit: 13:00 
Sunset: 21:18
sunny   (Daytime)   What's Visible Now?

Phact - α Columbae (alpha Columbae)

Below the horizon.  Rise: 10:28 | Tran: 12:35 | Set: 14:41
Altitude: -2.1°   Azimuth: 148.7°   Direction: South-South-East

Phact, also designated as α Columbae (alpha Columbae), is a variable and double sub-giant star of spectral class B7 in the constellation of Columba.

Phact visual magnitude is 2.64. Because of its brightness, Phact is clearly visible to the naked eye when observed from locations with dark skies, and should be also quite easily visible from light polluted areas.

Celestial coordinates and finder chart of Phact

Finder chart Phact - α Columbae (alpha Columbae) star
Simplified finder chart for Phact - α Columbae (alpha Columbae).

Phact is situated south of the celestial equator, as such, it is more easily visible from the southern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of Phact are provided in the following table:

05h 39m 38s
-34° 04’ 27”
Image of Phact - α Columbae (alpha Columbae) star
DSS2 image of Phact. The red arrow shows the motion of Phact during the next 10000 years (1.17 arcmin in Right Ascension and -4.33 arcmin in declination);

Key facts about Phact


and has a luminosity class of IV corresponding to a sub-giant star.


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

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

Phact star system properties

Phact 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 Phact double sysyem:

13.5 arcsec

Distance of Phact from the Sun and relative movement

Phact is distant 268.09 light years from the Sun and it is moving far from the Sun at the speed of 35 kilometers per second.

82.24 pc
268.09 ly
35 km/s
0.007 arcsec/year
-0.026 arcsec/year

Alternative designations of Phact

α Columbae
(alpha Columbae)

Visibility of Phact from your location

Today's Phact - α Columbae (alpha Columbae) rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 124.1°
Max altitude: 4.4°
Azimuth: 235.9°