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: 6:55  
clear_day Transit: 12:49  
SunsetSet: 18:41 south
sunny DaytimeWhat's Visible Now
All Constellations » Cepheus » 


Altitude: 40.2°   Azimuth: 22.6°   Direction: North-North-East

HR8557 is a giant star in the constellation of Cepheus.

HR8557 visual magnitude is 5.47. Because of its reltive faintness, HR8557 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 HR8557:


HR8557 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 40.2°
Azimuth: 22.6°
Direction: North-North-East

Celestial coordinates and finder chart of HR8557

HR8557 is situated close to the northern celestial pole and, as such, it is visible for most part of the year from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR8557 are provided in the following table:

22h 26m 00s
+70° 46’ 14”

The simplified sky map below shows the position of HR8557 in the sky:

Finder chart HR8557 star
Simplified finder chart for HR8557.

Visibility of HR8557 from your location

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

HR8557 is circumpolar and transits at 21:52 UTC (altitude: 70.7°)

Digitized Sky Survey image of HR8557

The image below is a photograph of HR8557 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 HR8557 is 0.018 arcsec per year in Right Ascension and 0.006 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR8557 star
DSS2 image of HR8557. The red arrow shows the motion of HR8557 during the next 10000 years (3.00 arcmin in Right Ascension and 1.00 arcmin in declination);

Distance of HR8557 from the Sun and relative movement

HR8557 is distant 519.94 light years from the Sun and it is moving towards the Sun at the speed of 17 kilometers per second.

159.49 pc
519.94 ly
-17 km/s
0.018 arcsec/year
0.006 arcsec/year

Spectral properties of HR8557

HR8557 belongs to spectral class K2


The red dot in the diagram below shows where HR8557 is situated in the HertzsprungÔÇôRussell diagram.

HR Diagram
H-R diagram showing the position of HR8557. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR8557