HR7659

HR7659 is a variable and double giant star in the constellation of Sagittarius.

HR7659 visual magnitude is 4.99. Because of its moderate brightness, HR7659 should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The table below summarizes the key facts about HR7659:

Color of HR7659 ⬤

Magnitude of HR7659 4.99

Class Giant

VISIBILITY RIGHT NOW HR7659 is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of HR7659

HR7659 is situated south of the celestial equator, as such, it is more easily visible from the southern emisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR7659 are provided in the following table:

Right Ascension J2000 20h 04m 19s

Declination J2000 -32° 03’ 23”

Galactic Longitude 9.34°

Galactic Latitude -28.55°

Constellation Sagittarius

The simplified sky map below shows the position of HR7659 in the sky:

Simplified finder chart for HR7659.

Visibility of HR7659 from your location

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

Today's HR7659 rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 122.1° RISE 5:42

Max altitude: 6.5° TRANSIT 8:13

Azimuth: 237.9° SET 10:45

RIGHT NOW HR7659 is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR7659

The image below is a photograph of HR7659 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 HR7659 is 0.047 arcsec per year in Right Ascension and -0.015 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of HR7659. The red arrow shows the motion of HR7659 during the next 10000 years (7.83 arcmin in Right Ascension and -2.50 arcmin in declination);

Distance of HR7659 from the Sun and relative movement

HR7659 is distant 324.38 light years from the Sun and it is moving towards the Sun at the speed of 12 kilometers per second.

Distance (parsec) 99.50 pc

Distance (light year) 324.38 ly

Heliocentric radial velocity -12 km/s

Proper Motion RA 0.047 arcsec/year

Proper Motion Dec -0.015 arcsec/year

Spectral properties of HR7659

HR7659 belongs to spectral class K1 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude 0.00

Spectral Type K1III

Color Index (B-V) 1.21

Temperature of HR7659 4289K

The red dot in the diagram below shows where HR7659 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR7659. Attribution: Richard Powell / CC BY-SA

HR7659 star system properties

HR7659 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 HR7659 double sysyem:

Main star magnitude 4.99

Secondary star magnitude 12.59

Magnitude difference 7.6

Separation 51.3 arcsec

Alternative designations of HR7659

Henry Draper Catalogue HD190056

SAO Catalogue SAO211782

Hipparcos Catalogue HIP98842

Durchmusterung Catalogue CD-3215682

FK5 Catalogue 3606

General Catalogue of Variable Stars 12746

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