HR6841

Below the horizon. Rise: 13:40 | Tran: 17:59 | Set: 22:19

Alt: -44.41° Az: 301.27° Direction: West-North-West

HR6841 is a double giant star of spectral class O7 in the constellation of Sagittarius.

HR6841 visual magnitude is 6.54. Because of its faintness, HR6841 is not visible to the naked eye.

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);

Celestial Coordinates

Apparent

Right Ascension 18h 18m 55s

Declination -18° 27’ 08”

Hour Angle 09h 19m 43s

Sideral Time 03h 38m 38s

J2000

Right Ascension 18h 17m 28s

Declination -18° 27’ 47”

Galactic Coordinates

Galactic Longitude 12.7°

Galactic Latitude -1.13°

Finder Chart

Simplified finder chart for HR6841.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 6.54

Class Giant

Absolute magnitude -5.01

Spectral Type O7III

Color Index (B-V) 0.11

Temperature 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

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

Distance, Radial Speed, Proper Motion

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

Distance (light year) 6,653.06

Radial Speed 1 km/s

Proper Motion RA -0.003 arcsec/y

Alternative Designations

Henry Draper Catalogue HD167771

SAO Catalogue SAO161267

Hipparcos Catalogue HIP89630

Durchmusterung Catalogue BD-18 4886

Visibility from Your Location

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

Azimuth: 108.5° RISE 13:40

Max altitude: 20.1° TRANSIT 17:59

Azimuth: 251.5° SET 22:19

Set Location

Other stars in Sagittarius