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: 6:49  
clear_day Transit: 12:50  
SunsetSet: 18:50 south
sunny DaytimeWhat's Visible Now
All Constellations » Draco » 


Altitude: 59.0°   Azimuth: 13.9°   Direction: North-North-East

HR3847 is a hypergiant star in the constellation of Draco.

HR3847 visual magnitude is 6.17. Because of its reltive faintness, HR3847 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 HR3847:


HR3847 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 59.0°
Azimuth: 13.9°
Direction: North-North-East

Celestial coordinates and finder chart of HR3847

HR3847 is situated close to the northern celestial pole and, as such, it is visible for most part of the year from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR3847 are provided in the following table:

09h 47m 17s
+79° 08’ 12”

The simplified sky map below shows the position of HR3847 in the sky:

Finder chart HR3847 star
Simplified finder chart for HR3847.

Visibility of HR3847 from your location

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

HR3847 is circumpolar and transits at 09:31 UTC (altitude: 62.3°)

Digitized Sky Survey image of HR3847

The image below is a photograph of HR3847 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 HR3847 is -0.031 arcsec per year in Right Ascension and -0.021 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR3847 star
DSS2 image of HR3847. The red arrow shows the motion of HR3847 during the next 10000 years (-5.17 arcmin in Right Ascension and -3.50 arcmin in declination);

Distance of HR3847 from the Sun and relative movement

HR3847 is distant 416.35 light years from the Sun and it is moving towards the Sun at the speed of 7 kilometers per second.

127.71 pc
416.35 ly
-7 km/s
-0.031 arcsec/year
-0.021 arcsec/year

Spectral properties of HR3847

HR3847 belongs to spectral class F0 and has a luminosity class of V corresponding to a hypergiant star.


The red dot in the diagram below shows where HR3847 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR3847. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR3847