HR6658

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 skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about HR6658:

Color of HR6658 ⬤

Magnitude of HR6658 5.6

Class Giant

VISIBILITY RIGHT NOW HR6658 is below the horizon from Greenwich, United Kingdom edit_location_alt.

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:

Right Ascension J2000 17h 53m 23s

Declination J2000 -34° 53’ 43”

Galactic Longitude 355.72°

Galactic Latitude -4.47°

Constellation Scorpius

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

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° RISE 0:09

Max altitude: 3.6° TRANSIT 2:08

Azimuth: 235.1° SET 4:03

RIGHT NOW HR6658 is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR6658

The image below is a photograph of HR6658 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 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.

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);

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.

Distance (parsec) 323.62 pc

Distance (light year) 1,055.02 ly

Heliocentric radial velocity -7 km/s

Proper Motion RA -0.009 arcsec/year

Proper Motion Dec -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.

Absolute magnitude -1.95

Spectral Type K3III

Color Index (B-V) 1.14

Temperature of HR6658 4430K

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

Main star magnitude 5.6

Secondary star magnitude 5.7

Magnitude difference 0.1

Separation 0.4 arcsec

Alternative designations of HR6658

Henry Draper Catalogue HD162587

SAO Catalogue SAO209416

Hipparcos Catalogue HIP87569

Durchmusterung Catalogue CD-3412203

In Evidence

Other stars in Scorpius