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: 4:46  
clear_day Transit: 12:57  
SunsetSet: 21:08 south
wb_twilight Astronomical TwilightWhat's Visible Now
All Constellations » Crater » 


Altitude: -2.7°   Azimuth: 253.8°   Direction: West-South-West

HR4547 is a variable and double giant star in the constellation of Crater.

HR4547 visual magnitude is 6.35. Because of its reltive faintness, HR4547 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 HR4547:


HR4547 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -2.7°
Azimuth: 253.8°
Direction: West-South-West

Celestial coordinates and finder chart of HR4547

HR4547 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 HR4547 are provided in the following table:

11h 51m 21s
-12° 11’ 16”

The simplified sky map below shows the position of HR4547 in the sky:

Finder chart HR4547 star
Simplified finder chart for HR4547.

Visibility of HR4547 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 HR4547 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: 102.2°
Max altitude: 26.3°
Azimuth: 257.8°
HR4547 is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR4547

The image below is a photograph of HR4547 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 HR4547 is -0.238 arcsec per year in Right Ascension and 0.048 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of HR4547 star
DSS2 image of HR4547. The red arrow shows the motion of HR4547 during the next 1000 years (-3.97 arcmin in Right Ascension and 0.80 arcmin in declination);

Distance of HR4547 from the Sun and relative movement

HR4547 is distant 146.52 light years from the Sun and it is moving far from the Sun at the speed of 9 kilometers per second.

44.94 pc
146.52 ly
9 km/s
-0.238 arcsec/year
0.048 arcsec/year

Spectral properties of HR4547

HR4547 belongs to spectral class F1 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR4547 is situated in the HertzsprungÔÇôRussell diagram.

HR Diagram
H-R diagram showing the position of HR4547. Attribution: Richard Powell / CC BY-SA

HR4547 star system properties

HR4547 is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the HR4547 double sysyem:

30.7 arcsec

Alternative designations of HR4547