HR7899

Above the horizon. Rise: 12:59 | Tran: 20:20 | Set: 3:46

Alt: 10.27° Az: 282.71° Direction: West-North-West

HR7899 is a multiple main-sequence star of spectral class B3 in the constellation of Delphinus.

HR7899 visual magnitude is 5.97. Because of its faintness, HR7899 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 HR7899. The red arrow shows the motion of HR7899 during the next 10000 years (0.17 arcmin in Right Ascension and -2.83 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 20h 40m 13s

Declination +15° 55’ 35”

Hour Angle 06h 13m 54s

Sideral Time 02h 54m 08s

J2000

Right Ascension 20h 39m 05s

Declination +15° 50’ 17”

Galactic Coordinates

Galactic Longitude 60.16°

Galactic Latitude -15.25°

Finder Chart

Simplified finder chart for HR7899.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.97

Class Main-sequence

Absolute magnitude -2.03

Spectral Type B3V

Color Index (B-V) -0.14

Temperature 12293K

The red dot in the diagram below shows where HR7899 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR7899. Attribution: Richard Powell / CC BY-SA

Star System Properties

HR7899 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 HR7899 double sysyem:

Main star magnitude 5.97

Secondary star magnitude 11.57

Magnitude difference 5.6

Separation 22.5 arcsec

Distance, Radial Speed, Proper Motion

HR7899 is distant 1,298.80 light years from the Sun and it is moving far from the Sun at the speed of 2 kilometers per second.

Distance (parsec) 398.41

Distance (light year) 1,298.80

Radial Speed 2 km/s

Proper Motion RA 0.001 arcsec/y

Proper Motion Dec -0.017"/y

Alternative Designations

Henry Draper Catalogue HD196775

SAO Catalogue SAO106347

Hipparcos Catalogue HIP101909

Durchmusterung Catalogue BD+15 4220

Aitken Double Star Catalogue ADS14106

Visibility from Your Location

Today's HR7899 rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 74.1° RISE 12:59

Max altitude: 54.4° TRANSIT 20:20

Azimuth: 285.9° SET 3:46

Set Location

Other stars in Delphinus