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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:48  
clear_day Transit: 11:49  
SunsetSet: 15:50 south
sleep NighttimeWhat's Visible Now?
All Constellations » Pegasus » 

Biham - θ Pegasi (theta Pegasi)

Altitude: 24.8°   Azimuth: 247.1°   Direction: West-South-West

Biham, also designated as θ Pegasi (theta Pegasi), is a variable main-sequence star in the constellation of Pegasus.

Biham visual magnitude is 3.53. Because of its moderate brightness, Biham 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 Biham:


Biham - θ Pegasi (theta Pegasi) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 24.8°
Azimuth: 247.1°
Direction: West-South-West

Celestial coordinates and finder chart of Biham

Biham 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 Biham are provided in the following table:

22h 10m 12s
+06° 11’ 52”

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

Finder chart Biham - θ Pegasi (theta Pegasi) star
Simplified finder chart for Biham - θ Pegasi (theta Pegasi).

Visibility of Biham 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 Biham - θ Pegasi (theta Pegasi) 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: 83.8°
Max altitude: 44.7°
Azimuth: 276.2°

Digitized Sky Survey image of Biham

The image below is a photograph of Biham 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 Biham is 0.276 arcsec per year in Right Ascension and 0.027 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of Biham - θ Pegasi (theta Pegasi) star
DSS2 image of Biham. The red arrow shows the motion of Biham during the next 1000 years (4.60 arcmin in Right Ascension and 0.45 arcmin in declination);

Distance of Biham from the Sun and relative movement

Biham is distant 96.54 light years from the Sun and it is moving towards the Sun at the speed of 6 kilometers per second.

29.61 pc
96.54 ly
-6 km/s
0.276 arcsec/year
0.027 arcsec/year

Spectral properties of Biham

Biham belongs to spectral class A2 and has a luminosity class of V corresponding to a main-sequence star.


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

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

Alternative designations of Biham

θ Pegasi
(theta Pegasi)