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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: 7:44  
clear_day Transit: 11:48  
SunsetSet: 15:51 south
sleep NighttimeWhat's Visible Now?
All Constellations » Pegasus » 


Altitude: 39.7°   Azimuth: 266.7°   Direction: West

HR8257 is a hypergiant star in the constellation of Pegasus.

HR8257 visual magnitude is 6.31. Because of its reltive faintness, HR8257 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 HR8257:


HR8257 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 39.7°
Azimuth: 266.7°
Direction: West

Celestial coordinates and finder chart of HR8257

HR8257 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 HR8257 are provided in the following table:

21h 35m 18s
+28° 11’ 49”

The simplified sky map below shows the position of HR8257 in the sky:

Finder chart HR8257 star
Simplified finder chart for HR8257.

Visibility of HR8257 from your location

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

Today's HR8257 rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 61.8°
Max altitude: 66.7°
Azimuth: 298.2°

Digitized Sky Survey image of HR8257

The image below is a photograph of HR8257 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 HR8257 is 0.128 arcsec per year in Right Ascension and -0.043 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of HR8257 star
DSS2 image of HR8257. The red arrow shows the motion of HR8257 during the next 1000 years (2.13 arcmin in Right Ascension and -0.72 arcmin in declination);

Distance of HR8257 from the Sun and relative movement

HR8257 is distant 234.53 light years from the Sun and it is moving towards the Sun at the speed of 42 kilometers per second.

71.94 pc
234.53 ly
-42 km/s
0.128 arcsec/year
-0.043 arcsec/year

Spectral properties of HR8257

HR8257 belongs to spectral class F0 and has a luminosity class of IV corresponding to a hypergiant star.


The red dot in the diagram below shows where HR8257 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR8257. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR8257