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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: 6:40  
clear_day Transit: 12:10  
SunsetSet: 17:41
sunny DaytimeWhat's Visible Now?
All Constellations » Cygnus » 


Altitude: 74.0°   Azimuth: 182.9°   Direction: South

HR7927 is a variable sub-giant star in the constellation of Cygnus.

HR7927 visual magnitude is 6.66. Because of its reltive faintness, HR7927 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 HR7927 is -0.019 arcsec per year in Right Ascension and -0.009 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR7927 star
DSS2 image of HR7927. The red arrow shows the motion of HR7927 during the next 10000 years (-3.17 arcmin in Right Ascension and -1.50 arcmin in declination);

Key facts about HR7927


HR7927 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 74.0°
Azimuth: 182.9°
Direction: South

Celestial coordinates and finder chart of HR7927

HR7927 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 HR7927 are provided in the following table:

20h 42m 22s
+35° 27’ 21”

The simplified sky map below shows the position of HR7927 in the sky:

Finder chart HR7927 star
Simplified finder chart for HR7927.

Visibility of HR7927 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 HR7927 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: 54.5°
Max altitude: 74.0°
Azimuth: 305.5°

Distance of HR7927 from the Sun and relative movement

HR7927 is distant 1,172.66 light years from the Sun and it is moving towards the Sun at the speed of 7 kilometers per second.

359.71 pc
1,172.66 ly
-7 km/s
-0.019 arcsec/year
-0.009 arcsec/year

Spectral properties of HR7927

HR7927 belongs to spectral class B2 and has a luminosity class of IV corresponding to a sub-giant star.


The red dot in the diagram below shows where HR7927 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR7927. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR7927