HR7642

Below the horizon. Rise: 17:35 | Tran: 4:59 | Set: 16:19

Alt: -0.16° Az: 5.18° Direction: North

HR7642 is a double sub-giant star of spectral class B5 in the constellation of Cygnus.

HR7642 visual magnitude is 6.32. Because of its faintness, HR7642 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 HR7642. The red arrow shows the motion of HR7642 during the next 100000 years (15.00 arcmin in Right Ascension and -6.67 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 19h 59m 29s

Declination +38° 10’ 32”

Hour Angle 12h 26m 22s

Sidereal Time 08h 25m 51s

J2000

Right Ascension 19h 58m 34s

Declination +38° 06’ 20”

Galactic Coordinates

Galactic Longitude 73.84°

Galactic Latitude 4.54°

Finder Chart

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Finder chart for HR7642.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 6.32

Class Sub-giant

Absolute magnitude -2.34

Spectral Type B5IV

Color Index (B-V) -0.09

Temperature 11407K

The red dot in the diagram below shows where HR7642 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR7642. Attribution: Richard Powell / CC BY-SA

Star System Properties

HR7642 is a visual double star which can be observed with the help of medium or large telescopes. The table below shows key information about the HR7642 double sysyem:

Main star magnitude 6.32

Secondary star magnitude 7.42

Magnitude difference 1.1

Separation 1.9 arcsec

Distance, Radial Speed, Proper Motion

HR7642 is distant 1,762.16 light years from the Sun and it is moving towards the Sun at the speed of 14 kilometers per second.

Distance (parsec) 540.54

Distance (light year) 1,762.16

Radial Speed -14 km/s

Proper Motion RA 0.009 arcsec/y

Proper Motion Dec -0.004"/y

Alternative Designations

Henry Draper Catalogue HD189432

SAO Catalogue SAO69193

Hipparcos Catalogue HIP98320

Durchmusterung Catalogue BD+37 3703

Aitken Double Star Catalogue ADS13198

Visibility from Your Location

Today's HR7642 rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 51.8° RISE 17:35

Max altitude: 76.7° TRANSIT 4:59

Azimuth: 308.2° SET 16:19

Set Location

Other stars in Cygnus