σ Coronae Borealis (sigma Coronae Borealis)

Above the horizon. Rise: 7:45 | Tran: 17:31 | Set: 3:20

Alt: 65.55° Az: 127.25° Direction: South-East

σ Coronae Borealis is a multiple main-sequence star of spectral class G1 in the constellation of Corona Borealis.

σ Coronae Borealis visual magnitude is 6.66. Because of its faintness, σ Coronae Borealis is not visible to the naked eye.

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);

Celestial Coordinates

Apparent

Right Ascension 16h 15m 36s

Declination +33° 47’ 51”

Hour Angle 22h 26m 34s

Sideral Time 14h 42m 11s

J2000

Right Ascension 16h 14m 40s

Declination +33° 51’ 29”

Galactic Coordinates

Galactic Longitude 54.67°

Galactic Latitude 46.14°

Finder Chart

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

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 6.66

Class Main-sequence

Absolute magnitude 4.98

Spectral Type G1V

Color Index (B-V)

Temperature 10125K

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

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

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:

Main star magnitude 6.66

Secondary star magnitude 7.66

Magnitude difference 1

Separation 6.4 arcsec

Distance, Radial Speed, Proper Motion

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.

Distance (parsec) 21.69

Distance (light year) 70.70

Radial Speed -17 km/s

Proper Motion RA -0.271 arcsec/y

Proper Motion Dec -0.079"/y

Alternative Designations

Bayer designation σ Coronae Borealis
(sigma Coronae Borealis)

Flamsteed designation 17 Coronae Borealis

Henry Draper Catalogue HD146362

Durchmusterung Catalogue BD+34 2750

Gliese Catalogue Gl 615.2B

Aitken Double Star Catalogue ADS9979

Visibility from Your Location

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

Azimuth: 56.2° RISE 7:45

Max altitude: 72.3° TRANSIT 17:31

Azimuth: 303.8° SET 3:20

Name:	Greenwich, UK
Latitude:	51° 28' 48.0" N
Longitude:	0° 0' 0.0" E
Timezone:	Europe/London

Location

Other stars in Corona Borealis