40 Boötis

Above the horizon. Rise: 13:04 | Tran: 21:56 | Set: 6:44

Alt: 40.61° Az: 68.38° Direction: South-West

40 Boötis is a hypergiant star of spectral class F0 in the constellation of Boötes.

40 Boötis visual magnitude is 5.64. Because of its faintness, 40 Boötis 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.

DSS2 image of 40 Boötis. The red arrow shows the motion of 40 Boötis during the next 10000 years (-5.33 arcmin in Right Ascension and 7.00 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 15h 00m 35s

Declination +39° 09’ 54”

Hour Angle 19h 37m 51s

Sidereal Time 10h 38m 26s

J2000

Right Ascension 14h 59m 36s

Declination +39° 15’ 55”

Galactic Coordinates

Galactic Longitude 65.66°

Galactic Latitude 60.77°

Finder Chart

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Finder chart for 40 Boötis.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.64

Class Hypergiant

Absolute magnitude 2.13

Spectral Type F0IV

Color Index (B-V) 0.31

Temperature 7399K

The red dot in the diagram below shows where 40 Boötis is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 40 Boötis. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

40 Boötis is distant 164.40 light years from the Sun and it is moving far from the Sun at the speed of 12 kilometers per second.

Distance (parsec) 50.43

Distance (light year) 164.40

Radial Speed 12 km/s

Proper Motion RA -0.032 arcsec/y

Proper Motion Dec 0.042"/y

Alternative Designations

Flamsteed designation 40 Boötis

Henry Draper Catalogue HD132772

SAO Catalogue SAO64449

Hipparcos Catalogue HIP73369

Durchmusterung Catalogue BD+39 2820

FK5 Catalogue 3182

Visibility from Your Location

Today's 40 Boötis rise, transit and set times from Claymont, United States are the following (all times relative to the local timezone America/New_York):

Azimuth: 50.8° RISE 13:04

Max altitude: 89.4° TRANSIT 21:56

Azimuth: 309.2° SET 6:44

Name:	Claymont, United States
Latitude:	39° 48' 2.5" N
Longitude:	75° 27' 34.6" W
Timezone:	America/New_York

Set Location

Other stars in Boötes