υ Coronae Borealis (upsilon Coronae Borealis)

Below the horizon. Rise: 8:34 | Tran: 17:29 | Set: 2:27

Alt: -1.47° Az: 324.42° Direction: North-West

υ Coronae Borealis is a variable and multiple main-sequence star of spectral class A3 in the constellation of Corona Borealis.

υ Coronae Borealis visual magnitude is 5.78. Because of its faintness, υ Coronae Borealis is visible to the naked eye only from locations with very dark skies, while it is not visible at all from skies affected by light pollution.

Image of υ Coronae Borealis (upsilon Coronae Borealis) star

DSS2 image of υ Coronae Borealis. The red arrow shows the motion of υ Coronae Borealis during the next 10000 years (3.83 arcmin in Right Ascension and -2.67 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 16h 17m 44s

Declination +29° 05’ 26”

Hour Angle 09h 13m 03s

Sideral Time 01h 30m 48s

J2000

Right Ascension 16h 16m 44s

Declination +29° 09’ 01”

Galactic Coordinates

Galactic Longitude 48.09°

Galactic Latitude 45.06°

Finder Chart

Simplified finder chart for υ Coronae Borealis (upsilon Coronae Borealis).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.78

Class Main-sequence

Absolute magnitude -1.24

Spectral Type A3V

Color Index (B-V) 0.07

Temperature 9328K

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

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

Star System Properties

υ 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 υ Coronae Borealis double sysyem:

Main star magnitude 5.78

Secondary star magnitude 10.08

Magnitude difference 4.3

Separation 123.4 arcsec

Distance, Radial Speed, Proper Motion

υ Coronae Borealis is distant 825.32 light years from the Sun and it is moving far from the Sun at the speed of 7 kilometers per second.

Distance (parsec) 253.16

Distance (light year) 825.32

Radial Speed 7 km/s

Proper Motion RA 0.023 arcsec/y

Proper Motion Dec -0.016"/y

Alternative Designations

Bayer designation υ Coronae Borealis
(upsilon Coronae Borealis)

Flamsteed designation 18 Coronae Borealis

Henry Draper Catalogue HD146738

SAO Catalogue SAO84281

Hipparcos Catalogue HIP79757

Durchmusterung Catalogue BD+29 2803

FK5 Catalogue 3287

General Catalogue of Variable Stars 7596

Aitken Double Star Catalogue ADS9990

Visibility from Your Location

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

Azimuth: 60.9° RISE 8:34

Max altitude: 67.6° TRANSIT 17:29

Azimuth: 299.1° SET 2:27

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

Location

Other stars in Corona Borealis