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: 4:48  
clear_day Transit: 12:56  
SunsetSet: 21:05 south
sunny DaytimeWhat's Visible Now
All Constellations » Pegasus » 

HR8799

HR8799 is a variable main-sequence star in the constellation of Pegasus.

HR8799 visual magnitude is 5.99. Because of its reltive faintness, HR8799 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 HR8799:

5.99
Main-sequence
HR8799 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Celestial coordinates and finder chart of HR8799

HR8799 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 HR8799 are provided in the following table:

23h 07m 28s
+21° 08’ 03”
92.76°
-35.57°
Pegasus

The simplified sky map below shows the position of HR8799 in the sky:

Finder chart HR8799 star
Simplified finder chart for HR8799.

Visibility of HR8799 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 HR8799 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: 68.9°
Max altitude: 59.7°
Azimuth: 291.1°
HR8799 is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR8799

The image below is a photograph of HR8799 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 HR8799 is 0.108 arcsec per year in Right Ascension and -0.052 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of HR8799 star
DSS2 image of HR8799. The red arrow shows the motion of HR8799 during the next 1000 years (1.80 arcmin in Right Ascension and -0.87 arcmin in declination);

Distance of HR8799 from the Sun and relative movement

HR8799 is distant 130.19 light years from the Sun and it is moving towards the Sun at the speed of 12 kilometers per second.

39.94 pc
130.19 ly
-12 km/s
0.108 arcsec/year
-0.052 arcsec/year

Spectral properties of HR8799

HR8799 belongs to spectral class A5 and has a luminosity class of V corresponding to a main-sequence star.

2.98
A5V
7726K

The red dot in the diagram below shows where HR8799 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR8799. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR8799

SAO91022
SAO91022