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public LocationGreenwich, UK
TimezoneEurope/London
Sunrise: 5:07 
Transit: 13:06 
Sunset: 21:04
wb_twilight   (Nautical Twilight)   What's Visible Now?
All Constellations » Cepheus » 

HR8399

Above the horizon.  Circumpolar today
Alt: 76.33°   Az: 330.14°   Direction: North-North-West

HR8399 is a variable and double hypergiant star of spectral class B0 in the constellation of Cepheus.

HR8399 visual magnitude is 6.66. Because of its faintness, HR8399 is not visible to the naked eye.

HR8399 is situated close to the northern celestial pole and, as such, it is visible for most part of the year from the northern hemisphere.

Image of HR8399 star
DSS2 image of HR8399. The red arrow shows the motion of HR8399 during the next 100000 years (-1.67 arcmin in Right Ascension and 11.67 arcmin in declination);

Celestial Coordinates

Apparent

22h 01m 23s
+62° 36’ 24”
00h 59m 16s
23h 00m 39s

J2000

22h 00m 39s
+62° 29’ 17”

Galactic Coordinates

104.58°
5.87°

Finder Chart

Finder chart HR8399 star
Simplified finder chart for HR8399.

Magnitude, Color, Spectral Class

6.66
Hypergiant

-7.61
B0IV
9434K

The red dot in the diagram below shows where HR8399 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR8399. Attribution: Richard Powell / CC BY-SA

Star System Properties

HR8399 is a visual double star which can be observed with the help of large telescopes. The table below shows key information about the HR8399 double sysyem:

6.66
8.66
2
0.9 arcsec

Distance, Radial Speed, Proper Motion

HR8399 is distant 23,285.71 light years from the Sun and it is moving towards the Sun at the speed of 20 kilometers per second.

7,142.86 pc
23,285.71 ly
-20 km/s
-0.001 arcsec/y
0.007 "/y

Alternative Designations

SAO19792
SAO19792

Visibility from Your Location

HR8399 is circumpolar and transits at 02:11 UTC (altitude: 78.9°)