Your guide to the Solar System and the night sky
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🌎  Greenwich, United Kingdom [change]

σ Coronae Borealis (sigma Coronae Borealis)

σ Coronae Borealis is a multiple main-sequence star in the constellation of Corona Borealis.

σ Coronae Borealis visual magnitude is 6.66. Because of its reltive faintness, σ Coronae Borealis should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about σ Coronae Borealis:

6.66
Main-sequence
σ Coronae Borealis (sigma Coronae Borealis) is above the horizon from Greenwich, United Kingdom [change]. Altitude: 10°.

Celestial coordinates and finder chart of σ Coronae Borealis

σ 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 σ Coronae Borealis are provided in the following table:

16h 14m 40s
+33° 51’ 29”
54.67°
46.14°
Corona Borealis

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

Finder chart σ Coronae Borealis (sigma Coronae Borealis) star
Simplified finder chart for σ Coronae Borealis (sigma Coronae Borealis).

Visibility of σ Coronae Borealis from your location

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's σ Coronae Borealis (sigma Coronae Borealis) rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 56.1°
Max altitude: 72.4°
Azimuth: 303.9°
σ Coronae Borealis (sigma Coronae Borealis) is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of σ Coronae Borealis

The image below is a photograph of σ Coronae Borealis 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 σ Coronae Borealis is -0.271 arcsec per year in Right Ascension and -0.079 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of σ Coronae Borealis (sigma Coronae Borealis) star
DSS2 image of σ Coronae Borealis. The red arrow shows the motion of σ Coronae Borealis during the next 1000 years (-4.52 arcmin in Right Ascension and -1.32 arcmin in declination);

Distance of σ Coronae Borealis from the Sun and relative movement

σ Coronae Borealis is distant 70.70 light years from the Sun and it is moving towards the Sun at the speed of 17 kilometers per second.

21.69 pc
70.70 ly
-17 km/s
-0.271 arcsec/year
-0.079 arcsec/year

Spectral properties of σ Coronae Borealis

σ Coronae Borealis belongs to spectral class G1 and has a luminosity class of V corresponding to a main-sequence star.

4.98
G1V
10125K

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

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

σ Coronae Borealis star system properties

σ Coronae Borealis is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the σ Coronae Borealis double sysyem:

6.66
7.66
1
6.4 arcsec

Alternative designations of σ Coronae Borealis

σ Coronae Borealis
(sigma Coronae Borealis)
17 Coronae Borealis
Gl 615.2B