HR6645

Below the horizon. Rise: 14:46 | Tran: 17:33 | Set: 20:21

Alt: -48.51° Az: 280.84° Direction: West

HR6645 is a double hypergiant star of spectral class A0 in the constellation of Scorpius.

HR6645 visual magnitude is 6.66. Because of its faintness, HR6645 is not visible to the naked eye.

DSS2 image of HR6645. The red arrow shows the motion of HR6645 during the next 10000 years (0.33 arcmin in Right Ascension and -1.83 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 17h 52m 48s

Declination -30° 33’ 43”

Hour Angle 08h 43m 40s

Sideral Time 02h 36m 28s

J2000

Right Ascension 17h 51m 12s

Declination -30° 33’ 25”

Galactic Coordinates

Galactic Longitude 359.24°

Galactic Latitude -1.88°

Finder Chart

Simplified finder chart for HR6645.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 6.66

Class Hypergiant

Absolute magnitude 0.05

Spectral Type A0V

Color Index (B-V) 0.04

Temperature 9652K

The red dot in the diagram below shows where HR6645 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR6645. Attribution: Richard Powell / CC BY-SA

Star System Properties

HR6645 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 HR6645 double sysyem:

Main star magnitude 6.66

Secondary star magnitude 8.16

Magnitude difference 1.5

Separation 10.2 arcsec

Distance, Radial Speed, Proper Motion

HR6645 is distant 684.87 light years from the Sun and it is moving towards the Sun at the speed of 9 kilometers per second.

Distance (parsec) 210.08

Distance (light year) 684.87

Radial Speed -9 km/s

Proper Motion RA 0.002 arcsec/y

Proper Motion Dec -0.011"/y

Alternative Designations

Henry Draper Catalogue HD162220

SAO Catalogue SAO209357

Hipparcos Catalogue HIP87380

Durchmusterung Catalogue CD-3014802

Visibility from Your Location

Today's HR6645 rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 120.6° RISE 14:46

Max altitude: 8.0° TRANSIT 17:33

Azimuth: 239.4° SET 20:21

Set Location

Other stars in Scorpius