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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: 6:04  
clear_day Transit: 12:06  
SunsetSet: 18:09
sunny DaytimeWhat's Visible Now?
All Constellations » Scorpius » 

HR6658

Altitude: 1.0°   Azimuth: 199.8°   Direction: South-South-West

HR6658 is a double giant star in the constellation of Scorpius.

HR6658 visual magnitude is 5.6. Because of its reltive faintness, HR6658 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 HR6658 is -0.009 arcsec per year in Right Ascension and -0.01 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR6658 star
DSS2 image of HR6658. The red arrow shows the motion of HR6658 during the next 10000 years (-1.50 arcmin in Right Ascension and -1.67 arcmin in declination);

Key facts about HR6658

5.6
Giant

HR6658 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 1.0°
Azimuth: 199.8°
Direction: South-South-West

Celestial coordinates and finder chart of HR6658

HR6658 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 HR6658 are provided in the following table:

17h 53m 23s
-34° 53’ 43”
355.72°
-4.47°
Scorpius

The simplified sky map below shows the position of HR6658 in the sky:

Finder chart HR6658 star
Simplified finder chart for HR6658.

Visibility of HR6658 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 HR6658 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: 124.9°
Max altitude: 3.6°
Azimuth: 235.1°

Distance of HR6658 from the Sun and relative movement

HR6658 is distant 1,055.02 light years from the Sun and it is moving towards the Sun at the speed of 7 kilometers per second.

323.62 pc
1,055.02 ly
-7 km/s
-0.009 arcsec/year
-0.01 arcsec/year

Spectral properties of HR6658

HR6658 belongs to spectral class K3 and has a luminosity class of III corresponding to a giant star.

-1.95
K3III
4430K

The red dot in the diagram below shows where HR6658 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR6658. Attribution: Richard Powell / CC BY-SA

HR6658 star system properties

HR6658 is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the HR6658 double sysyem:

5.6
5.7
0.1
0.4 arcsec

Alternative designations of HR6658

SAO209416
SAO209416