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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
SunriseRise: 6:46  
clear_day Transit: 12:11  
SunsetSet: 17:36
sleep NighttimeWhat's Visible Now?
All Constellations » Corona Borealis » 

θ Coronae Borealis (theta Coronae Borealis)

Altitude: 53.3°   Azimuth: 106.8°   Direction: East-South-East

θ Coronae Borealis is a variable and double main-sequence star in the constellation of Corona Borealis.

θ Coronae Borealis visual magnitude is 4.14. Because of its moderate brightness, θ Coronae Borealis should be easily visible from locations with dark skies, while it can be barely visible, or not visible at all, from skies affected by light pollution.

The proper motion of θ Coronae Borealis is -0.019 arcsec per year in Right Ascension and -0.011 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of θ Coronae Borealis (theta Coronae Borealis) star
DSS2 image of θ Coronae Borealis. The red arrow shows the motion of θ Coronae Borealis during the next 10000 years (-3.17 arcmin in Right Ascension and -1.83 arcmin in declination);

Key facts about θ Coronae Borealis

4.14
Main-sequence

θ Coronae Borealis (theta Coronae Borealis) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 53.3°
Azimuth: 106.8°
Direction: East-South-East

Celestial coordinates and finder chart of θ Coronae Borealis

θ Coronae Borealis is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of θ Coronae Borealis are provided in the following table:

15h 32m 55s
+31° 21’ 33”
49.69°
54.71°
Corona Borealis

The simplified sky map below shows the position of θ Coronae Borealis in the sky:

Finder chart θ Coronae Borealis (theta Coronae Borealis) star
Simplified finder chart for θ Coronae Borealis (theta Coronae Borealis).

Visibility of θ Coronae Borealis 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 θ Coronae Borealis (theta Coronae Borealis) 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: 58.6°
Max altitude: 69.9°
Azimuth: 301.4°

Distance of θ Coronae Borealis from the Sun and relative movement

θ Coronae Borealis is distant 310.77 light years from the Sun and it is moving towards the Sun at the speed of 25 kilometers per second.

95.33 pc
310.77 ly
-25 km/s
-0.019 arcsec/year
-0.011 arcsec/year

Spectral properties of θ Coronae Borealis

θ Coronae Borealis belongs to spectral class B6 and has a luminosity class of V corresponding to a main-sequence star.

-0.76
B6V
12103K

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

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

θ Coronae Borealis star system properties

θ Coronae Borealis 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 Coronae Borealis double sysyem:

4.14
5.54
1.4
0.5 arcsec

Alternative designations of θ Coronae Borealis

θ Coronae Borealis
(theta Coronae Borealis)
4 Coronae Borealis
SAO64769
SAO64769