Your Guide to the Solar System and the Night Sky
This site is free and ad-free thanks to the support of our users. If you can, please consider a donation.
public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 6:46  
clear_day Transit: 12:51  
SunsetSet: 18:55 south
wb_twilight Nautical TwilightWhat's Visible Now
All Constellations » Cetus » 


Altitude: 11.0°   Azimuth: 223.9°   Direction: South-West

HR547 is a variable hypergiant star in the constellation of Cetus.

HR547 visual magnitude is 5.8. Because of its reltive faintness, HR547 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 HR547:


HR547 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 11.0°
Azimuth: 223.9°
Direction: South-West

Celestial coordinates and finder chart of HR547

HR547 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 HR547 are provided in the following table:

01h 52m 52s
-16° 55’ 45”

The simplified sky map below shows the position of HR547 in the sky:

Finder chart HR547 star
Simplified finder chart for HR547.

Visibility of HR547 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 HR547 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: 106.9°
Max altitude: 21.6°
Azimuth: 253.1°

Digitized Sky Survey image of HR547

The image below is a photograph of HR547 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 HR547 is 0.042 arcsec per year in Right Ascension and -0.053 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR547 star
DSS2 image of HR547. The red arrow shows the motion of HR547 during the next 10000 years (7.00 arcmin in Right Ascension and -8.83 arcmin in declination);

Distance of HR547 from the Sun and relative movement

HR547 is distant 330.29 light years from the Sun and it is moving towards the Sun at the speed of 4 kilometers per second.

101.32 pc
330.29 ly
-4 km/s
0.042 arcsec/year
-0.053 arcsec/year

Spectral properties of HR547

HR547 belongs to spectral class F0 and has a luminosity class of III corresponding to a hypergiant star.


The red dot in the diagram below shows where HR547 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR547. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR547