HR7840

Above the horizon. Rise: 13:24 | Tran: 20:20 | Set: 3:20

Alt: 48.51° Az: 160.69° Direction: South-South-East

HR7840 is a multiple main-sequence star of spectral class B8 in the constellation of Delphinus.

HR7840 visual magnitude is 7.11. Because of its faintness, HR7840 is not visible to the naked eye.

DSS2 image of HR7840. The red arrow shows the motion of HR7840 during the next 100000 years (0.00 arcmin in Right Ascension and -5.00 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 20h 32m 23s

Declination +11° 20’ 43”

Hour Angle 23h 08m 20s

Sideral Time 19h 40m 44s

J2000

Right Ascension 20h 31m 13s

Declination +11° 15’ 38”

Galactic Coordinates

Galactic Longitude 55.1°

Galactic Latitude -16.21°

Finder Chart

Simplified finder chart for HR7840.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 7.11

Class Main-sequence

Absolute magnitude -22.89

Spectral Type B8V

Color Index (B-V) 0.03

Temperature 9766K

The red dot in the diagram below shows where HR7840 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR7840. Attribution: Richard Powell / CC BY-SA

Star System Properties

HR7840 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 HR7840 double sysyem:

Main star magnitude 7.11

Secondary star magnitude 7.41

Magnitude difference 0.3

Separation 16.7 arcsec

Distance, Radial Speed, Proper Motion

HR7840 is distant 32,600,000.00 light years from the Sun and it is moving towards the Sun at the speed of 11 kilometers per second.

Distance (parsec) 10,000,000.00

Distance (light year) 32,600,000.00

Radial Speed -11 km/s

Proper Motion Dec -0.003"/y

Alternative Designations

Henry Draper Catalogue HD195483

SAO Catalogue SAO106196

Hipparcos Catalogue HIP101235

Durchmusterung Catalogue BD+10 4307

Aitken Double Star Catalogue ADS13946

Visibility from Your Location

Today's HR7840 rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 78.7° RISE 13:24

Max altitude: 49.9° TRANSIT 20:20

Azimuth: 281.3° SET 3:20

Set Location

Other stars in Delphinus