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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: 7:54  
clear_day Transit: 11:51  
SunsetSet: 15:49 south
sunny DaytimeWhat's Visible Now?
All Constellations » Vulpecula » 


Altitude: 39.8°   Azimuth: 105.2°   Direction: East-South-East

HR8158 is a sub-giant star in the constellation of Vulpecula.

HR8158 visual magnitude is 6.29. Because of its reltive faintness, HR8158 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 HR8158:


HR8158 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 39.8°
Azimuth: 105.2°
Direction: East-South-East

Celestial coordinates and finder chart of HR8158

HR8158 is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR8158 are provided in the following table:

21h 20m 13s
+22° 01’ 35”

The simplified sky map below shows the position of HR8158 in the sky:

Finder chart HR8158 star
Simplified finder chart for HR8158.

Visibility of HR8158 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 HR8158 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: 68.0°
Max altitude: 60.5°
Azimuth: 292.0°

Digitized Sky Survey image of HR8158

The image below is a photograph of HR8158 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 HR8158 is 0.003 arcsec per year in Right Ascension and 0.01 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR8158 star
DSS2 image of HR8158. The red arrow shows the motion of HR8158 during the next 10000 years (0.50 arcmin in Right Ascension and 1.67 arcmin in declination);

Distance of HR8158 from the Sun and relative movement

HR8158 is distant 538.84 light years from the Sun and it is moving towards the Sun at the speed of 17 kilometers per second.

165.29 pc
538.84 ly
-17 km/s
0.003 arcsec/year
0.01 arcsec/year

Spectral properties of HR8158

HR8158 belongs to spectral class B6 and has a luminosity class of IV corresponding to a sub-giant star.


The red dot in the diagram below shows where HR8158 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR8158. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR8158