HR6841

HR6841 is a double giant star in the constellation of Sagittarius.

HR6841 visual magnitude is 6.54. Because of its reltive faintness, HR6841 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 HR6841:

Color of HR6841 ⬤

Magnitude of HR6841 6.54

Class Giant

VISIBILITY RIGHT NOW HR6841 is above the horizon from Greenwich, United Kingdom [change]. Altitude: 19°.

Celestial coordinates and finder chart of HR6841

HR6841 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 HR6841 are provided in the following table:

Right Ascension J2000 18h 17m 28s

Declination J2000 -18° 27’ 47”

Galactic Longitude 12.7°

Galactic Latitude -1.13°

Constellation Sagittarius

The simplified sky map below shows the position of HR6841 in the sky:

Simplified finder chart for HR6841.

Visibility of HR6841 from your location

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

Today's HR6841 rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 108.5° RISE 1:56

Max altitude: 20.1° TRANSIT 6:15

Azimuth: 251.5° SET 10:34

RIGHT NOW HR6841 is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR6841

The image below is a photograph of HR6841 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 HR6841 is -0.003 arcsec per year in Right Ascension and 0 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

DSS2 image of HR6841. The red arrow shows the motion of HR6841 during the next 100000 years (-5.00 arcmin in Right Ascension and 0.00 arcmin in declination);

Distance of HR6841 from the Sun and relative movement

HR6841 is distant 6,653.06 light years from the Sun and it is moving far from the Sun at the speed of 1 kilometers per second.

Distance (parsec) 2,040.82 pc

Distance (light year) 6,653.06 ly

Heliocentric radial velocity 1 km/s

Proper Motion RA -0.003 arcsec/year

Spectral properties of HR6841

HR6841 belongs to spectral class O7 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude -5.01

Spectral Type O7III

Color Index (B-V) 0.11

Temperature of HR6841 8932K

The red dot in the diagram below shows where HR6841 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR6841. Attribution: Richard Powell / CC BY-SA

HR6841 star system properties

HR6841 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 HR6841 double sysyem:

Main star magnitude 6.54

Secondary star magnitude 13.14

Magnitude difference 6.6

Separation 8.4 arcsec

Alternative designations of HR6841

Henry Draper Catalogue HD167771

SAO Catalogue SAO161267

Hipparcos Catalogue HIP89630

Durchmusterung Catalogue BD-18 4886

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Other stars in Sagittarius