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: 4:43  
clear_day Transit: 12:58  
SunsetSet: 21:12 south
wb_twilight Astronomical TwilightWhat's Visible Now
All Constellations » Cygnus » 


Altitude: 62.4°   Azimuth: 83.6°   Direction: East

HR7958 is a double main-sequence star in the constellation of Cygnus.

HR7958 visual magnitude is 6.3. Because of its reltive faintness, HR7958 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 HR7958:


HR7958 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 62.4°
Azimuth: 83.6°
Direction: East

Celestial coordinates and finder chart of HR7958

HR7958 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 HR7958 are provided in the following table:

20h 46m 38s
+46° 31’ 54”

The simplified sky map below shows the position of HR7958 in the sky:

Finder chart HR7958 star
Simplified finder chart for HR7958.

Visibility of HR7958 from your location

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

HR7958 is circumpolar and transits at 03:33 UTC (altitude: 85.1°)

Digitized Sky Survey image of HR7958

The image below is a photograph of HR7958 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 HR7958 is -0.024 arcsec per year in Right Ascension and -0.013 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR7958 star
DSS2 image of HR7958. The red arrow shows the motion of HR7958 during the next 10000 years (-4.00 arcmin in Right Ascension and -2.17 arcmin in declination);

Distance of HR7958 from the Sun and relative movement

HR7958 is distant 413.18 light years from the Sun and it is moving towards the Sun at the speed of 6 kilometers per second.

126.74 pc
413.18 ly
-6 km/s
-0.024 arcsec/year
-0.013 arcsec/year

Spectral properties of HR7958

HR7958 belongs to spectral class A3 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where HR7958 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR7958. Attribution: Richard Powell / CC BY-SA

HR7958 star system properties

HR7958 is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the HR7958 double sysyem:

0.5 arcsec

Alternative designations of HR7958