HR6739

Below the horizon. Rise: 23:23 | Tran: 1:04 | Set: 2:42

Alt: -28.14° Az: 113.31° Direction: South-South-West

HR6739 is a double giant star of spectral class K2 in the constellation of Sagittarius.

HR6739 visual magnitude is 6. Because of its faintness, HR6739 is visible to the naked eye only from locations with very dark skies, while it is not visible at all from skies affected by light pollution.

DSS2 image of HR6739. The red arrow shows the motion of HR6739 during the next 10000 years (-2.67 arcmin in Right Ascension and -5.83 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 18h 06m 33s

Declination -35° 53’ 52”

Hour Angle 17h 54m 07s

Sidereal Time 12h 00m 41s

J2000

Right Ascension 18h 04m 50s

Declination -35° 54’ 05”

Galactic Coordinates

Galactic Longitude 355.99°

Galactic Latitude -7°

Finder Chart

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Finder chart for HR6739.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 6

Class Giant

Absolute magnitude 0.81

Spectral Type K2III

Color Index (B-V) 1.16

Temperature 4389K

The red dot in the diagram below shows where HR6739 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR6739. Attribution: Richard Powell / CC BY-SA

Star System Properties

HR6739 is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the HR6739 double sysyem:

Main star magnitude 6

Secondary star magnitude 11.2

Magnitude difference 5.2

Separation 12.5 arcsec

Distance, Radial Speed, Proper Motion

HR6739 is distant 355.12 light years from the Sun and it is moving towards the Sun at the speed of 16 kilometers per second.

Distance (parsec) 108.93

Distance (light year) 355.12

Radial Speed -16 km/s

Proper Motion RA -0.016 arcsec/y

Proper Motion Dec -0.035"/y

Alternative Designations

Henry Draper Catalogue HD164870

SAO Catalogue SAO209671

Hipparcos Catalogue HIP88550

Durchmusterung Catalogue CD-3512229

FK5 Catalogue 3435

Visibility from Your Location

Today's HR6739 rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 125.9° RISE 23:23

Max altitude: 2.6° TRANSIT 1:04

Azimuth: 234.1° SET 2:42

Set Location

Other stars in Sagittarius