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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 7:00 
Transit: 11:43 
Sunset: 16:26
wb_twilight   (Astronomical Twilight)  
What's Visible Now • Tonight Timeline
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All Constellations » Boötes » 

HR5640

Above the horizon.  Rise: 3:51 | Tran: 12:12 | Set: 20:33
Alt: 19.63°   Az: 285.83°   Direction: West-North-West

HR5640 is a double giant star of spectral class K1 in the constellation of Boötes.

HR5640 visual magnitude is 5.81. Because of its faintness, HR5640 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 HR5640 star
DSS2 image of HR5640. The red arrow shows the motion of HR5640 during the next 100000 years (-13.33 arcmin in Right Ascension and -1.67 arcmin in declination);

Celestial Coordinates

Apparent

15h 09m 40s
+25° 00’ 53”
05h 57m 57s
21h 07m 37s

J2000

15h 08m 35s
+25° 06’ 30”

Galactic Coordinates

37.03°
59.24°

Finder Chart

Finder chart HR5640 star
Simplified finder chart for HR5640.

Magnitude, Color, Spectral Class

5.81
Giant

-0.16
K1III
4232K

The red dot in the diagram below shows where HR5640 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR5640. Attribution: Richard Powell / CC BY-SA

Star System Properties

HR5640 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 HR5640 double sysyem:

5.81
9.91
4.1
57.5 arcsec

Distance, Radial Speed, Proper Motion

HR5640 is distant 510.17 light years from the Sun and it is moving towards the Sun at the speed of 16 kilometers per second.

156.49
510.17
-16 km/s
-0.008 arcsec/y
-0.001"/y

Alternative Designations

SAO83685
SAO83685

Visibility from Your Location

Today's HR5640 rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 65.0°
Max altitude: 63.5°
Azimuth: 295.0°