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 » Orion » 


HR1799 is a giant star in the constellation of Orion.

HR1799 visual magnitude is 5.61. Because of its reltive faintness, HR1799 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 HR1799:

HR1799 is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 16°.

Celestial coordinates and finder chart of HR1799

HR1799 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 HR1799 are provided in the following table:

05h 25m 01s
-10° 19’ 45”

The simplified sky map below shows the position of HR1799 in the sky:

Finder chart HR1799 star
Simplified finder chart for HR1799.

Visibility of HR1799 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 HR1799 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: 100.3°
Max altitude: 28.2°
Azimuth: 259.7°
HR1799 is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR1799

The image below is a photograph of HR1799 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 HR1799 is -0.017 arcsec per year in Right Ascension and -0.022 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR1799 star
DSS2 image of HR1799. The red arrow shows the motion of HR1799 during the next 10000 years (-2.83 arcmin in Right Ascension and -3.67 arcmin in declination);

Distance of HR1799 from the Sun and relative movement

HR1799 is distant 635.48 light years from the Sun and it is moving far from the Sun at the speed of 57 kilometers per second.

194.93 pc
635.48 ly
57 km/s
-0.017 arcsec/year
-0.022 arcsec/year

Spectral properties of HR1799

HR1799 belongs to spectral class K5 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR1799 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR1799. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR1799