Your guide to the Solar System and the night sky
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🌎  Observing from: Greenwich, United Kingdom [change]
🌅 Sunrise: 6:41  ☀️ Transit: 13:03  🌅 Sunset: 19:26


HR8857 is a hypergiant star in the constellation of Andromeda.

HR8857 visual magnitude is 6.43. Because of its reltive faintness, HR8857 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 HR8857:

HR8857 is above the horizon from Greenwich, United Kingdom [change]. Altitude: 8°.

Celestial coordinates and finder chart of HR8857

HR8857 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 HR8857 are provided in the following table:

23h 17m 16s
+45° 09’ 51”

The simplified sky map below shows the position of HR8857 in the sky:

Finder chart HR8857 star
Simplified finder chart for HR8857.

Visibility of HR8857 from your location

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

HR8857 is circumpolar and transits at 10:46 UTC (altitude: 83.7°)

Digitized Sky Survey image of HR8857

The image below is a photograph of HR8857 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 HR8857 is 0.097 arcsec per year in Right Ascension and -0.065 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of HR8857 star
DSS2 image of HR8857. The red arrow shows the motion of HR8857 during the next 1000 years (1.62 arcmin in Right Ascension and -1.08 arcmin in declination);

Distance of HR8857 from the Sun and relative movement

HR8857 is distant 240.95 light years from the Sun and it is moving towards the Sun at the speed of 38 kilometers per second.

73.91 pc
240.95 ly
-38 km/s
0.097 arcsec/year
-0.065 arcsec/year

Spectral properties of HR8857

HR8857 belongs to spectral class K0 and has a luminosity class of IV corresponding to a hypergiant star.


The red dot in the diagram below shows where HR8857 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR8857. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR8857