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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
north SunriseRise: 7:51  
clear_day Transit: 11:50  
SunsetSet: 15:49 south
sunny DaytimeWhat's Visible Now?
All Constellations » Cygnus » 


Altitude: 56.8°   Azimuth: 76.2°   Direction: East-North-East

HR7577 is a variable main-sequence star in the constellation of Cygnus.

HR7577 visual magnitude is 6.2. Because of its reltive faintness, HR7577 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 HR7577:


HR7577 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 56.8°
Azimuth: 76.2°
Direction: East-North-East

Celestial coordinates and finder chart of HR7577

HR7577 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 HR7577 are provided in the following table:

19h 51m 19s
+47° 22’ 37”

The simplified sky map below shows the position of HR7577 in the sky:

Finder chart HR7577 star
Simplified finder chart for HR7577.

Visibility of HR7577 from your location

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

HR7577 is circumpolar and transits at 14:38 UTC (altitude: 85.9°)

Digitized Sky Survey image of HR7577

The image below is a photograph of HR7577 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 HR7577 is 0.018 arcsec per year in Right Ascension and 0.019 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR7577 star
DSS2 image of HR7577. The red arrow shows the motion of HR7577 during the next 10000 years (3.00 arcmin in Right Ascension and 3.17 arcmin in declination);

Distance of HR7577 from the Sun and relative movement

HR7577 is distant 215.32 light years from the Sun and it is moving towards the Sun at the speed of 18 kilometers per second.

66.05 pc
215.32 ly
-18 km/s
0.018 arcsec/year
0.019 arcsec/year

Spectral properties of HR7577

HR7577 belongs to spectral class F2 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where HR7577 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR7577. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR7577