Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:00  
clear_day Transit: 12:48  
SunsetSet: 18:34 south
sleep NighttimeWhat's Visible Now
All Constellations » Cygnus » 


Altitude: 51.7°   Azimuth: 257.9°   Direction: West-South-West

HR7678 is a variable and double supergiant star in the constellation of Cygnus.

HR7678 visual magnitude is 5.64. Because of its reltive faintness, HR7678 should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about HR7678:


HR7678 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 51.7°
Azimuth: 257.9°
Direction: West-South-West

Celestial coordinates and finder chart of HR7678

HR7678 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 HR7678 are provided in the following table:

20h 04m 36s
+32° 13’ 06”

The simplified sky map below shows the position of HR7678 in the sky:

Finder chart HR7678 star
Simplified finder chart for HR7678.

Visibility of HR7678 from your location

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

Today's HR7678 rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 57.8°
Max altitude: 70.7°
Azimuth: 302.2°

Digitized Sky Survey image of HR7678

The image below is a photograph of HR7678 from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). The proper motion of HR7678 is -0.011 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 HR7678 star
DSS2 image of HR7678. The red arrow shows the motion of HR7678 during the next 10000 years (-1.83 arcmin in Right Ascension and -2.00 arcmin in declination);

Distance of HR7678 from the Sun and relative movement

HR7678 is distant 13,583.33 light years from the Sun and it is moving far from the Sun at the speed of 21 kilometers per second.

4,166.67 pc
13,583.33 ly
21 km/s
-0.011 arcsec/year
-0.012 arcsec/year

Spectral properties of HR7678

HR7678 belongs to spectral class B1 and has a luminosity class of I corresponding to a supergiant star.


The red dot in the diagram below shows where HR7678 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR7678. Attribution: Richard Powell / CC BY-SA

HR7678 star system properties

HR7678 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 HR7678 double sysyem:

32.1 arcsec

Alternative designations of HR7678