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: 7:04  
clear_day Transit: 12:47  
SunsetSet: 18:30 south
sunny DaytimeWhat's Visible Now
All Constellations » Cygnus » 


Altitude: 3.0°   Azimuth: 25.4°   Direction: North-North-East

HR7757 is a giant star in the constellation of Cygnus.

HR7757 visual magnitude is 6.48. Because of its reltive faintness, HR7757 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 HR7757:


HR7757 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 3.0°
Azimuth: 25.4°
Direction: North-North-East

Celestial coordinates and finder chart of HR7757

HR7757 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 HR7757 are provided in the following table:

20h 16m 28s
+37° 03’ 23”

The simplified sky map below shows the position of HR7757 in the sky:

Finder chart HR7757 star
Simplified finder chart for HR7757.

Visibility of HR7757 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 HR7757 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: 52.9°
Max altitude: 75.6°
Azimuth: 307.1°

Digitized Sky Survey image of HR7757

The image below is a photograph of HR7757 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 HR7757 is 0.013 arcsec per year in Right Ascension and 0.001 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR7757 star
DSS2 image of HR7757. The red arrow shows the motion of HR7757 during the next 10000 years (2.17 arcmin in Right Ascension and 0.17 arcmin in declination);

Distance of HR7757 from the Sun and relative movement

HR7757 is distant 1,139.86 light years from the Sun and it is moving towards the Sun at the speed of 8 kilometers per second.

349.65 pc
1,139.86 ly
-8 km/s
0.013 arcsec/year
0.001 arcsec/year

Spectral properties of HR7757

HR7757 belongs to spectral class B6 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR7757 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR7757. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR7757