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public LocationGreenwich, UK
Sunrise: 5:07 
Transit: 13:06 
Sunset: 21:04
wb_twilight   (Nautical Twilight)   What's Visible Now?
All Constellations » Ophiuchus » 


Above the horizon.  Rise: 17:34 | Tran: 23:01 | Set: 4:32
Alt: 6.15°   Az: 252.04°   Direction: West-South-West

HR6661 is a variable supergiant star of spectral class F8 in the constellation of Ophiuchus.

HR6661 visual magnitude is 6.21. Because of its faintness, HR6661 is visible to the naked eye only from locations with very dark skies, while it is not visible at all from skies affected by light pollution.

HR6661 is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year.

Image of HR6661 star
DSS2 image of HR6661. The red arrow shows the motion of HR6661 during the next 100000 years (13.33 arcmin in Right Ascension and -15.00 arcmin in declination);

Celestial Coordinates


17h 53m 57s
-06° 08’ 51”
04h 48m 08s
22h 42m 05s


17h 52m 38s
-06° 08’ 36”

Galactic Coordinates


Finder Chart

Finder chart HR6661 star
Simplified finder chart for HR6661.

Magnitude, Color, Spectral Class



The red dot in the diagram below shows where HR6661 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR6661. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

HR6661 is distant 2,859.65 light years from the Sun and it is moving towards the Sun at the speed of 5 kilometers per second.

877.19 pc
2,859.65 ly
-5 km/s
0.008 arcsec/y
-0.009 "/y

Alternative Designations


Visibility from Your Location

Today's HR6661 rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 96.1°
Max altitude: 32.4°
Azimuth: 263.9°