HR6661

HR6661 is a variable supergiant star in the constellation of Ophiuchus.

HR6661 visual magnitude is 6.21. Because of its reltive faintness, HR6661 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 HR6661:

Color of HR6661 ⬤

Magnitude of HR6661 6.21

Class Supergiant

VISIBILITY RIGHT NOW HR6661 is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of HR6661

HR6661 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 HR6661 are provided in the following table:

Right Ascension J2000 17h 52m 38s

Declination J2000 -06° 08’ 36”

Galactic Longitude 20.6°

Galactic Latitude 10.12°

Constellation Ophiuchus

The simplified sky map below shows the position of HR6661 in the sky:

Simplified finder chart for HR6661.

Visibility of HR6661 from your location

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

Today's HR6661 rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 96.1° RISE 0:40

Max altitude: 32.4° TRANSIT 6:11

Azimuth: 263.9° SET 11:38

RIGHT NOW HR6661 is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR6661

The image below is a photograph of HR6661 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 HR6661 is 0.008 arcsec per year in Right Ascension and -0.009 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

DSS2 image of HR6661. The red arrow shows the motion of HR6661 during the next 100000 years (13.33 arcmin in Right Ascension and -15.00 arcmin in declination);

Distance of HR6661 from the Sun and relative movement

HR6661 is distant 2,859.65 light years from the Sun and it is moving towards the Sun at the speed of 5 kilometers per second.

Distance (parsec) 877.19 pc

Distance (light year) 2,859.65 ly

Heliocentric radial velocity -5 km/s

Proper Motion RA 0.008 arcsec/year

Proper Motion Dec -0.009 arcsec/year

Spectral properties of HR6661

HR6661 belongs to spectral class F8 and has a luminosity class of I corresponding to a supergiant star.

Absolute magnitude -3.51

Spectral Type F8I

Color Index (B-V) 1.4

Temperature of HR6661 3950K

The red dot in the diagram below shows where HR6661 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR6661. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR6661

Henry Draper Catalogue HD162714

SAO Catalogue SAO141926

Hipparcos Catalogue HIP87495

Durchmusterung Catalogue BD-06 4672

General Catalogue of Variable Stars Y Oph

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Other stars in Ophiuchus