HR7803

Below the horizon. Rise: 16:08 | Tran: 22:12 | Set: 4:19

Alt: -25.87° Az: 310.17° Direction: North-West

HR7803 is a variable and multiple main-sequence star of spectral class B9 in the constellation of Aquila.

HR7803 visual magnitude is 6.15. Because of its faintness, HR7803 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 HR7803. The red arrow shows the motion of HR7803 during the next 100000 years (5.00 arcmin in Right Ascension and 11.67 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 20h 25m 52s

Declination +01° 09’ 00”

Hour Angle 09h 06m 11s

Sideral Time 05h 32m 04s

J2000

Right Ascension 20h 24m 37s

Declination +01° 04’ 06”

Galactic Coordinates

Galactic Longitude 45.03°

Galactic Latitude -20.09°

Finder Chart

Simplified finder chart for HR7803.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 6.15

Class Main-sequence

Absolute magnitude -0.91

Spectral Type B9V

Color Index (B-V) -0.04

Temperature 10653K

The red dot in the diagram below shows where HR7803 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR7803. Attribution: Richard Powell / CC BY-SA

Star System Properties

HR7803 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 HR7803 double sysyem:

Main star magnitude 6.15

Secondary star magnitude 10.85

Magnitude difference 4.7

Separation 31.3 arcsec

Distance, Radial Speed, Proper Motion

HR7803 is distant 840.21 light years from the Sun and it is moving towards the Sun at the speed of 9 kilometers per second.

Distance (parsec) 257.73

Distance (light year) 840.21

Radial Speed -9 km/s

Proper Motion RA 0.003 arcsec/y

Proper Motion Dec 0.007"/y

Alternative Designations

Henry Draper Catalogue HD194244

SAO Catalogue SAO125769

Hipparcos Catalogue HIP100664

Durchmusterung Catalogue BD+00 4495

General Catalogue of Variable Stars 13064

Aitken Double Star Catalogue ADS13811

Visibility from Your Location

Today's HR7803 rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 88.8° RISE 16:08

Max altitude: 39.7° TRANSIT 22:12

Azimuth: 271.2° SET 4:19

Name:	Greenwich, UK
Latitude:	51° 28' 48.0" N
Longitude:	0° 0' 0.0" E
Timezone:	Europe/London

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Location

Other stars in Aquila