We use cookies to deliver essential features and to measure their performance. Learn more.
Home
Search Objects
Major Solar System Objects
Comets
Asteroids
Spacecrafts
Star Maps
Orbits
public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 6:33 
Transit: 12:55 
Sunset: 19:17
sleep   (Nighttime)  
What's Visible Now • Tonight Timeline
Search  close
All Constellations » Cygnus » 

HR7870

Above the horizon.  Circumpolar today
Alt: 74.61°   Az: 261.09°   Direction: West

HR7870 is a double star of spectral class B9 in the constellation of Cygnus.

HR7870 visual magnitude is 5.78. Because of its faintness, HR7870 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.

Image of HR7870 star
DSS2 image of HR7870. The red arrow shows the motion of HR7870 during the next 10000 years (1.83 arcmin in Right Ascension and -0.17 arcmin in declination);

Celestial Coordinates

Apparent

20h 34m 43s
+46° 46’ 46”
01h 30m 03s
22h 04m 46s

J2000

20h 33m 54s
+46° 41’ 38”

Galactic Coordinates

84.62°
3.89°

Finder Chart

Finder chart HR7870 star
Simplified finder chart for HR7870.

Magnitude, Color, Spectral Class

5.78
HR7870 is also a Si chemically peculiar star.

-0.06
B9
12692K

The red dot in the diagram below shows where HR7870 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR7870. Attribution: Richard Powell / CC BY-SA

Star System Properties

HR7870 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 HR7870 double sysyem:

5.78
9.88
4.1
117.7 arcsec

Distance, Radial Speed, Proper Motion

HR7870 is distant 480.83 light years from the Sun and it is moving towards the Sun at the speed of 22 kilometers per second.

147.49
480.83
-22 km/s
0.011 arcsec/y
-0.001"/y

Alternative Designations

SAO49804
SAO49804

Visibility from Your Location

HR7870 is circumpolar and transits at 21:01 UTC (altitude: 85.3°)