HR6665

HR6665 is a multiple hypergiant star in the constellation of Hercules.

HR6665 visual magnitude is 6.46. Because of its reltive faintness, HR6665 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 HR6665:

Color of HR6665 ⬤

Magnitude of HR6665 6.46

Class Hypergiant

VISIBILITY RIGHT NOW HR6665 is above the horizon from Greenwich, United Kingdom [change]. Altitude: 52°.

Celestial coordinates and finder chart of HR6665

HR6665 is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR6665 are provided in the following table:

Right Ascension J2000 17h 51m 58s

Declination J2000 +15° 19’ 32”

Galactic Longitude 40.41°

Galactic Latitude 19.92°

Constellation Hercules

The simplified sky map below shows the position of HR6665 in the sky:

Simplified finder chart for HR6665.

Visibility of HR6665 from your location

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

Today's HR6665 rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 74.7° RISE 23:08

Max altitude: 53.8° TRANSIT 6:30

Azimuth: 285.3° SET 13:48

RIGHT NOW HR6665 is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR6665

The image below is a photograph of HR6665 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 HR6665 is 0 arcsec per year in Right Ascension and 0.031 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of HR6665. The red arrow shows the motion of HR6665 during the next 10000 years (0.00 arcmin in Right Ascension and 5.17 arcmin in declination);

Distance of HR6665 from the Sun and relative movement

HR6665 is distant 440.54 light years from the Sun and it is moving towards the Sun at the speed of 43 kilometers per second.

Distance (parsec) 135.14 pc

Distance (light year) 440.54 ly

Heliocentric radial velocity -43 km/s

Proper Motion Dec 0.031 arcsec/year

Spectral properties of HR6665

HR6665 belongs to spectral class K0 and has a luminosity class of III corresponding to a hypergiant star.

Absolute magnitude 0.81

Spectral Type K0III

Color Index (B-V)

Temperature of HR6665 10125K

The red dot in the diagram below shows where HR6665 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR6665. Attribution: Richard Powell / CC BY-SA

HR6665 star system properties

HR6665 is a visual double star which can be observed with the help of large telescopes. The table below shows key information about the HR6665 double sysyem:

Main star magnitude 6.46

Secondary star magnitude 6.66

Magnitude difference 0.2

Separation 0.8 arcsec

Alternative designations of HR6665

Henry Draper Catalogue HD162734

SAO Catalogue SAO103161

Hipparcos Catalogue HIP87427

Durchmusterung Catalogue BD+15 3292

Aitken Double Star Catalogue ADS10850

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In Evidence

Other stars in Hercules