Your guide to the Solar System and the night sky
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🌎  Observing from: Greenwich, United Kingdom [change]
🌅 Sunrise: 6:45  ☀️ Transit: 13:03  🌅 Sunset: 19:23


HR8170 is a main-sequence star in the constellation of Cygnus.

HR8170 visual magnitude is 6.4. Because of its reltive faintness, HR8170 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 HR8170:

HR8170 is above the horizon from Greenwich, United Kingdom [change]. Altitude: 62°.

Celestial coordinates and finder chart of HR8170

HR8170 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 HR8170 are provided in the following table:

21h 21m 01s
+40° 20’ 44”

The simplified sky map below shows the position of HR8170 in the sky:

Finder chart HR8170 star
Simplified finder chart for HR8170.

Visibility of HR8170 from your location

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

HR8170 is circumpolar and transits at 08:58 UTC (altitude: 78.9°)

Digitized Sky Survey image of HR8170

The image below is a photograph of HR8170 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 HR8170 is -0.019 arcsec per year in Right Ascension and -0.207 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of HR8170 star
DSS2 image of HR8170. The red arrow shows the motion of HR8170 during the next 1000 years (-0.32 arcmin in Right Ascension and -3.45 arcmin in declination);

Distance of HR8170 from the Sun and relative movement

HR8170 is distant 86.61 light years from the Sun and it is moving far from the Sun at the speed of 1 kilometers per second.

26.57 pc
86.61 ly
1 km/s
-0.019 arcsec/year
-0.207 arcsec/year

Spectral properties of HR8170

HR8170 belongs to spectral class F8 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where HR8170 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR8170. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR8170