Home
Search Objects
Major Solar System Objects
Comets
Asteroids
Spacecrafts
Star Maps
Orbits
public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 5:01 
Transit: 12:56 
Sunset: 20:52
warning Set your observing location to get relevant data
Search  close
All Constellations » Boötes » 

θ Boötis (theta Boötis)

Above the horizon.  Circumpolar today
Alt: 31.79°   Az: 314.80°   Direction: North-West

θ Boötis is a variable and double main-sequence star of spectral class F7 in the constellation of Boötes.

θ Boötis visual magnitude is 4.05. Because of its moderate brightness, θ Boötis is easily visible to the naked eye from locations with dark skies, while it might be barely visible, or not visible at all, from light-polluted skies.

Image of θ Boötis (theta Boötis) star
DSS2 image of θ Boötis. The red arrow shows the motion of θ Boötis during the next 1000 years (-3.93 arcmin in Right Ascension and -6.62 arcmin in declination);

Celestial Coordinates

Apparent

14h 26m 04s
+51° 44’ 13”
06h 52m 29s
21h 18m 33s

J2000

14h 25m 11s
+51° 51’ 02”

Galactic Coordinates

93.84°
59.65°

Finder Chart

loader
  Loading map...
Finder chart for θ Boötis (theta Boötis).

Magnitude, Color, Spectral Class

4.05
Main-sequence

3.23
F7V
6389K

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

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

Star System Properties

θ Boötis 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 θ Boötis double sysyem:

4.05
11.05
7
69.5 arcsec

Distance, Radial Speed, Proper Motion

θ Boötis is distant 47.50 light years from the Sun and it is moving towards the Sun at the speed of 11 kilometers per second.

14.57
47.50
-11 km/s
-0.236 arcsec/y
-0.397"/y

Alternative Designations

θ Boötis
(theta Boötis)
SAO29137
SAO29137
Gl 549 A

Visibility from Your Location

θ Boötis (theta Boötis) is circumpolar and transits at 22:26 UTC (altitude: 89.7°)