HR7439

Altitude: -43.9° Azimuth: 60.7° Direction: East-North-East

HR7439 is a hypergiant star in the constellation of Sagittarius.

HR7439 visual magnitude is 6.11. Because of its reltive faintness, HR7439 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 HR7439:

Color of HR7439 ⬤

Magnitude of HR7439 6.11

Class Hypergiant

VISIBILITY RIGHT NOW

HR7439 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -43.9°
Azimuth: 60.7°
Direction: East-North-East

Celestial coordinates and finder chart of HR7439

HR7439 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 HR7439 are provided in the following table:

Right Ascension J2000 19h 36m 26s

Declination J2000 -18° 51’ 10”

Galactic Longitude 20.57°

Galactic Latitude -18.16°

Constellation Sagittarius

The simplified sky map below shows the position of HR7439 in the sky:

Simplified finder chart for HR7439.

Visibility of HR7439 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 HR7439 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: 108.9° RISE 15:26

Max altitude: 19.7° TRANSIT 19:43

Azimuth: 251.1° SET 0:00

Digitized Sky Survey image of HR7439

The image below is a photograph of HR7439 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 HR7439 is 0.031 arcsec per year in Right Ascension and -0.003 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of HR7439. The red arrow shows the motion of HR7439 during the next 10000 years (5.17 arcmin in Right Ascension and -0.50 arcmin in declination);

Distance of HR7439 from the Sun and relative movement

HR7439 is distant 239.71 light years from the Sun and it is moving towards the Sun at the speed of 42 kilometers per second.

Distance (parsec) 73.53 pc

Distance (light year) 239.71 ly

Heliocentric radial velocity -42 km/s

Proper Motion RA 0.031 arcsec/year

Proper Motion Dec -0.003 arcsec/year

Spectral properties of HR7439

HR7439 belongs to spectral class F0 and has a luminosity class of III corresponding to a hypergiant star.

Absolute magnitude 1.78

Spectral Type F0III

Color Index (B-V) 0.27

Temperature of HR7439 7658K

The red dot in the diagram below shows where HR7439 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR7439. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR7439

Henry Draper Catalogue HD184705

SAO Catalogue SAO162809

Hipparcos Catalogue HIP96440

Durchmusterung Catalogue BD-19 5521

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In Evidence

Other stars in Sagittarius