HR6990

Altitude: 13.6° Azimuth: 195.7° Direction: South-South-West

HR6990 is a giant star in the constellation of Sagittarius.

HR6990 visual magnitude is 5.81. Because of its reltive faintness, HR6990 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 HR6990:

Color of HR6990 ⬤

Magnitude of HR6990 5.81

Class Giant

VISIBILITY RIGHT NOW

HR6990 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 13.6°
Azimuth: 195.7°
Direction: South-South-West

Celestial coordinates and finder chart of HR6990

HR6990 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 HR6990 are provided in the following table:

Right Ascension J2000 18h 38m 30s

Declination J2000 -23° 30’ 17”

Galactic Longitude 10.47°

Galactic Latitude -7.81°

Constellation Sagittarius

The simplified sky map below shows the position of HR6990 in the sky:

Simplified finder chart for HR6990.

Visibility of HR6990 from your location

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

Today's HR6990 rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 113.5° RISE 10:15

Max altitude: 15.0° TRANSIT 14:01

Azimuth: 246.5° SET 17:48

Digitized Sky Survey image of HR6990

The image below is a photograph of HR6990 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 HR6990 is -0.003 arcsec per year in Right Ascension and -0.02 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of HR6990. The red arrow shows the motion of HR6990 during the next 10000 years (-0.50 arcmin in Right Ascension and -3.33 arcmin in declination);

Distance of HR6990 from the Sun and relative movement

HR6990 is distant 465.05 light years from the Sun and it is moving towards the Sun at the speed of 33 kilometers per second.

Distance (parsec) 142.65 pc

Distance (light year) 465.05 ly

Heliocentric radial velocity -33 km/s

Proper Motion RA -0.003 arcsec/year

Proper Motion Dec -0.02 arcsec/year

Spectral properties of HR6990

HR6990 belongs to spectral class B8 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude 0.04

Spectral Type B8III

Color Index (B-V) 0.02

Temperature of HR6990 9882K

The red dot in the diagram below shows where HR6990 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR6990. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR6990

Henry Draper Catalogue HD171961

SAO Catalogue SAO187080

Hipparcos Catalogue HIP91405

Durchmusterung Catalogue CD-2314572

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In Evidence

Other stars in Sagittarius