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: 4:48  
clear_day Transit: 12:56  
SunsetSet: 21:05 south
sunny DaytimeWhat's Visible Now
All Constellations » Aquarius » 

66 Aquarii

66 Aquarii is a variable giant star in the constellation of Aquarius.

66 Aquarii visual magnitude is 4.69. Because of its moderate brightness, 66 Aquarii should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The table below summarizes the key facts about 66 Aquarii:

66 Aquarii is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 19°.

Celestial coordinates and finder chart of 66 Aquarii

66 Aquarii 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 66 Aquarii are provided in the following table:

22h 43m 35s
-18° 49’ 49”

The simplified sky map below shows the position of 66 Aquarii in the sky:

Finder chart 66 Aquarii star
Simplified finder chart for 66 Aquarii.

Visibility of 66 Aquarii 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 66 Aquarii 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: 108.8°
Max altitude: 19.7°
Azimuth: 251.2°
66 Aquarii is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 66 Aquarii

The image below is a photograph of 66 Aquarii 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 66 Aquarii is -0.027 arcsec per year in Right Ascension and -0.028 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 66 Aquarii star
DSS2 image of 66 Aquarii. The red arrow shows the motion of 66 Aquarii during the next 10000 years (-4.50 arcmin in Right Ascension and -4.67 arcmin in declination);

Distance of 66 Aquarii from the Sun and relative movement

66 Aquarii is distant 484.40 light years from the Sun and it is moving far from the Sun at the speed of 22 kilometers per second.

148.59 pc
484.40 ly
22 km/s
-0.027 arcsec/year
-0.028 arcsec/year

Spectral properties of 66 Aquarii

66 Aquarii belongs to spectral class K4 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where 66 Aquarii is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 66 Aquarii. Attribution: Richard Powell / CC BY-SA

Alternative designations of 66 Aquarii