45 Boötis

Above the horizon. Rise: 12:23 | Tran: 20:53 | Set: 5:28

Alt: 29.96° Az: 272.04° Direction: West

45 Boötis is a variable and multiple main-sequence star of spectral class F5 in the constellation of Boötes.

45 Boötis visual magnitude is 4.93. Because of its moderate brightness, 45 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.

DSS2 image of 45 Boötis. The red arrow shows the motion of 45 Boötis during the next 1000 years (3.08 arcmin in Right Ascension and -2.75 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 15h 08m 25s

Declination +24° 46’ 19”

Hour Angle 04h 49m 54s

Sidereal Time 19h 58m 19s

J2000

Right Ascension 15h 07m 18s

Declination +24° 52’ 09”

Galactic Coordinates

Galactic Longitude 36.45°

Galactic Latitude 59.48°

Finder Chart

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Finder chart for 45 Boötis.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 4.93

Class Main-sequence

Absolute magnitude 3.46

Spectral Type F5V

Color Index (B-V) 0.43

Temperature 6724K

The red dot in the diagram below shows where 45 Boötis is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 45 Boötis. Attribution: Richard Powell / CC BY-SA

Star System Properties

45 Boötis 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 45 Boötis double sysyem:

Main star magnitude 4.93

Secondary star magnitude 9.83

Magnitude difference 4.9

Separation 244.1 arcsec

Distance, Radial Speed, Proper Motion

45 Boötis is distant 64.30 light years from the Sun and it is moving towards the Sun at the speed of 7 kilometers per second.

Distance (parsec) 19.72

Distance (light year) 64.30

Radial Speed -7 km/s

Proper Motion RA 0.185 arcsec/y

Proper Motion Dec -0.165"/y

Alternative Designations

Flamsteed designation 45 Boötis

Henry Draper Catalogue HD134083

SAO Catalogue SAO83671

Hipparcos Catalogue HIP73996

Durchmusterung Catalogue BD+25 2873

Gliese Catalogue Gl 578

FK5 Catalogue 1396

General Catalogue of Variable Stars 6945

Visibility from Your Location

Today's 45 Boötis rise, transit and set times from Ringsend, Ireland are the following (all times relative to the local timezone Europe/Dublin):

Azimuth: 65.2° RISE 12:23

Max altitude: 61.4° TRANSIT 20:53

Azimuth: 294.8° SET 5:28

Name:	Ringsend, Ireland
Latitude:	53° 20' 30.8" N
Longitude:	6° 13' 35.0" W
Timezone:	Europe/Dublin

In Evidence

Other stars in Boötes

45 Boötis

Celestial Coordinates

Apparent

J2000

Galactic Coordinates

Finder Chart

Magnitude, Color, Spectral Class

Star System Properties

Distance, Radial Speed, Proper Motion

Alternative Designations

Visibility from Your Location

Set Location

In Evidence

Other stars in Boötes

45 Boötis

Celestial Coordinates

Apparent

J2000

Galactic Coordinates

Finder Chart

Magnitude, Color, Spectral Class

Star System Properties

Distance, Radial Speed, Proper Motion

Alternative Designations

Visibility from Your Location