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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
SunriseRise: 5:51  
clear_day Transit: 12:57  
SunsetSet: 20:04
sunny DaytimeWhat's Visible Now?
All Constellations » Boötes » 


Altitude: 27.2°   Azimuth: 38.4°   Direction: North-East

HR5857 is a variable star in the constellation of Boötes.

HR5857 visual magnitude is 5.51. Because of its reltive faintness, HR5857 should be visible only from locations with dark skies, while it is not visible at all from skies affected by light pollution.

The proper motion of HR5857 is -0.067 arcsec per year in Right Ascension and 0.032 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR5857 star
DSS2 image of HR5857. The red arrow shows the motion of HR5857 during the next 10000 years (-11.17 arcmin in Right Ascension and 5.33 arcmin in declination);

Key facts about HR5857


HR5857 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 27.2°
Azimuth: 38.4°
Direction: North-East

Celestial coordinates and finder chart of HR5857

HR5857 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 HR5857 are provided in the following table:

15h 42m 50s
+52° 21’ 38”

The simplified sky map below shows the position of HR5857 in the sky:

Finder chart HR5857 star
Simplified finder chart for HR5857.

Visibility of HR5857 from your location

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

HR5857 is circumpolar and transits at 01:44 UTC (altitude: 89.1°)

Distance of HR5857 from the Sun and relative movement

HR5857 is distant 316.50 light years from the Sun and it is moving towards the Sun at the speed of 16 kilometers per second.

97.09 pc
316.50 ly
-16 km/s
-0.067 arcsec/year
0.032 arcsec/year

Spectral properties of HR5857

HR5857 belongs to spectral class B9 HR5857 is also a SiCr chemically peculiar star.


The red dot in the diagram below shows where HR5857 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR5857. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR5857