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
sunny DaytimeWhat's Visible Now
All Constellations » Scorpius » 


Altitude: -52.9°   Azimuth: 81.2°   Direction: East

HR6668 is a main-sequence star in the constellation of Scorpius.

HR6668 visual magnitude is 5.96. Because of its reltive faintness, HR6668 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 HR6668:


HR6668 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -52.9°
Azimuth: 81.2°
Direction: East

Celestial coordinates and finder chart of HR6668

HR6668 is situated south of the celestial equator, as such, it is more easily visible from the southern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR6668 are provided in the following table:

17h 54m 27s
-34° 27’ 59”

The simplified sky map below shows the position of HR6668 in the sky:

Finder chart HR6668 star
Simplified finder chart for HR6668.

Visibility of HR6668 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 HR6668 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: 124.5°
Max altitude: 4.1°
Azimuth: 235.5°
HR6668 is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR6668

The image below is a photograph of HR6668 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 HR6668 is 0.01 arcsec per year in Right Ascension and 0.006 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR6668 star
DSS2 image of HR6668. The red arrow shows the motion of HR6668 during the next 10000 years (1.67 arcmin in Right Ascension and 1.00 arcmin in declination);

Distance of HR6668 from the Sun and relative movement

HR6668 is distant 842.38 light years from the Sun and it is moving towards the Sun at the speed of 16 kilometers per second.

258.40 pc
842.38 ly
-16 km/s
0.01 arcsec/year
0.006 arcsec/year

Spectral properties of HR6668

HR6668 belongs to spectral class B9 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where HR6668 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR6668. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR6668