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: 4:43  
clear_day Transit: 12:58  
SunsetSet: 21:12 south
wb_twilight Astronomical TwilightWhat's Visible Now
All Constellations » Camelopardalis » 


Altitude: 42.4°   Azimuth: 340.5°   Direction: North-North-West

HR3666 is a giant star in the constellation of Camelopardalis.

HR3666 visual magnitude is 6.5. Because of its reltive faintness, HR3666 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 HR3666:


HR3666 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 42.4°
Azimuth: 340.5°
Direction: North-North-West

Celestial coordinates and finder chart of HR3666

HR3666 is situated close to the northern celestial pole and, as such, it is visible for most part of the year from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR3666 are provided in the following table:

09h 19m 55s
+74° 00’ 59”

The simplified sky map below shows the position of HR3666 in the sky:

Finder chart HR3666 star
Simplified finder chart for HR3666.

Visibility of HR3666 from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

HR3666 is circumpolar and transits at 16:04 UTC (altitude: 67.5°)

Digitized Sky Survey image of HR3666

The image below is a photograph of HR3666 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 HR3666 is -0.037 arcsec per year in Right Ascension and -0.067 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR3666 star
DSS2 image of HR3666. The red arrow shows the motion of HR3666 during the next 10000 years (-6.17 arcmin in Right Ascension and -11.17 arcmin in declination);

Distance of HR3666 from the Sun and relative movement

HR3666 is distant 370.45 light years from the Sun and it is moving far from the Sun at the speed of 56 kilometers per second.

113.64 pc
370.45 ly
56 km/s
-0.037 arcsec/year
-0.067 arcsec/year

Spectral properties of HR3666

HR3666 belongs to spectral class G8 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR3666 is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of HR3666. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR3666