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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: 7:38  
clear_day Transit: 11:46  
SunsetSet: 15:54 south
sunny DaytimeWhat's Visible Now?
All Constellations » Virgo » 


Altitude: 39.3°   Azimuth: 195.9°   Direction: South-South-West

HR4807 is a variable giant star in the constellation of Virgo.

HR4807 visual magnitude is 5.71. Because of its reltive faintness, HR4807 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 HR4807:


HR4807 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 39.3°
Azimuth: 195.9°
Direction: South-South-West

Celestial coordinates and finder chart of HR4807

HR4807 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 HR4807 are provided in the following table:

12h 38m 22s
+01° 51’ 16”

The simplified sky map below shows the position of HR4807 in the sky:

Finder chart HR4807 star
Simplified finder chart for HR4807.

Visibility of HR4807 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 HR4807 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: 88.1°
Max altitude: 40.4°
Azimuth: 271.9°

Digitized Sky Survey image of HR4807

The image below is a photograph of HR4807 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 HR4807 is -0.08 arcsec per year in Right Ascension and -0.018 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR4807 star
DSS2 image of HR4807. The red arrow shows the motion of HR4807 during the next 10000 years (-13.33 arcmin in Right Ascension and -3.00 arcmin in declination);

Distance of HR4807 from the Sun and relative movement

HR4807 is distant 500.77 light years from the Sun and it is moving towards the Sun at the speed of 16 kilometers per second.

153.61 pc
500.77 ly
-16 km/s
-0.08 arcsec/year
-0.018 arcsec/year

Spectral properties of HR4807

HR4807 belongs to spectral class M3 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR4807 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR4807. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR4807