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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
SunriseRise: 6:40  
clear_day Transit: 12:10  
SunsetSet: 17:41
wb_twilight Astronomical TwilightWhat's Visible Now?
All Constellations » Lacerta » 

HR8666

Altitude: 23.8°   Azimuth: 312.6°   Direction: North-West

HR8666 is a variable hypergiant star in the constellation of Lacerta.

HR8666 visual magnitude is 5.76. Because of its reltive faintness, HR8666 should be visible only from locations with dark skies, while it is not visible at all from skies affected by light pollution.

The proper motion of HR8666 is 0.14 arcsec per year in Right Ascension and 0.032 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of HR8666 star
DSS2 image of HR8666. The red arrow shows the motion of HR8666 during the next 1000 years (2.33 arcmin in Right Ascension and 0.53 arcmin in declination);

Key facts about HR8666

5.76
Hypergiant

HR8666 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 23.8°
Azimuth: 312.6°
Direction: North-West

Celestial coordinates and finder chart of HR8666

HR8666 is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR8666 are provided in the following table:

22h 46m 10s
+44° 32’ 45”
100.6°
-12.83°
Lacerta

The simplified sky map below shows the position of HR8666 in the sky:

Finder chart HR8666 star
Simplified finder chart for HR8666.

Visibility of HR8666 from your location

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

HR8666 is circumpolar and transits at 11:59 UTC (altitude: 83.1°)

Distance of HR8666 from the Sun and relative movement

HR8666 is distant 173.50 light years from the Sun and it is moving towards the Sun at the speed of 10 kilometers per second.

53.22 pc
173.50 ly
-10 km/s
0.14 arcsec/year
0.032 arcsec/year

Spectral properties of HR8666

HR8666 belongs to spectral class F0 and has a luminosity class of III corresponding to a hypergiant star.

2.13
F0III
7101K

The red dot in the diagram below shows where HR8666 is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of HR8666. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR8666

SAO52348
SAO52348