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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
SunriseRise: 6:01  
clear_day Transit: 12:58  
SunsetSet: 19:56
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All Constellations » Cassiopeia » 

HR8770

Altitude: 70.1°   Azimuth: 293.9°   Direction: West-North-West

HR8770 is a variable and multiple giant star in the constellation of Cassiopeia.

HR8770 visual magnitude is 6.5. Because of its reltive faintness, HR8770 should be visible only from locations with dark skies, while it is not visible at all from skies affected by light pollution.

The proper motion of HR8770 is 0.008 arcsec per year in Right Ascension and 0.012 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR8770 star
DSS2 image of HR8770. The red arrow shows the motion of HR8770 during the next 10000 years (1.33 arcmin in Right Ascension and 2.00 arcmin in declination);

Key facts about HR8770

6.5
Giant

HR8770 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 70.1°
Azimuth: 293.9°
Direction: West-North-West

Celestial coordinates and finder chart of HR8770

HR8770 is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR8770 are provided in the following table:

23h 02m 43s
+55° 14’ 11”
107.79°
-4.41°
Cassiopeia

The simplified sky map below shows the position of HR8770 in the sky:

Finder chart HR8770 star
Simplified finder chart for HR8770.

Visibility of HR8770 from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

HR8770 is circumpolar and transits at 09:22 UTC (altitude: 86.2°)

Distance of HR8770 from the Sun and relative movement

HR8770 is distant 722.84 light years from the Sun and it is moving towards the Sun at the speed of 13 kilometers per second.

221.73 pc
722.84 ly
-13 km/s
0.008 arcsec/year
0.012 arcsec/year

Spectral properties of HR8770

HR8770 belongs to spectral class B9 and has a luminosity class of III corresponding to a giant star.

-0.23
B9III
11247K

The red dot in the diagram below shows where HR8770 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR8770. Attribution: Richard Powell / CC BY-SA

HR8770 star system properties

HR8770 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 HR8770 double sysyem:

6.5
10.1
3.6
19.5 arcsec

Alternative designations of HR8770

SAO35092
SAO35092