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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: 7:50  
clear_day Transit: 11:50  
SunsetSet: 15:49 south
sunny DaytimeWhat's Visible Now?
All Constellations » Cetus » 


Altitude: -54.9°   Azimuth: 28.7°   Direction: North-North-East

HR66 is a sub-giant star in the constellation of Cetus.

HR66 visual magnitude is 6.45. Because of its reltive faintness, HR66 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 HR66:


HR66 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -54.9°
Azimuth: 28.7°
Direction: North-North-East

Celestial coordinates and finder chart of HR66

HR66 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 HR66 are provided in the following table:

00h 17m 32s
-19° 03’ 03”

The simplified sky map below shows the position of HR66 in the sky:

Finder chart HR66 star
Simplified finder chart for HR66.

Visibility of HR66 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 HR66 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: 109.1°
Max altitude: 19.5°
Azimuth: 250.9°

Digitized Sky Survey image of HR66

The image below is a photograph of HR66 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 HR66 is 0.015 arcsec per year in Right Ascension and 0.003 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR66 star
DSS2 image of HR66. The red arrow shows the motion of HR66 during the next 10000 years (2.50 arcmin in Right Ascension and 0.50 arcmin in declination);

Distance of HR66 from the Sun and relative movement

HR66 is distant 159.26 light years from the Sun and it is moving towards the Sun at the speed of 5 kilometers per second.

48.85 pc
159.26 ly
-5 km/s
0.015 arcsec/year
0.003 arcsec/year

Spectral properties of HR66

HR66 belongs to spectral class F4 and has a luminosity class of IV corresponding to a sub-giant star.


The red dot in the diagram below shows where HR66 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR66. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR66