HR4439

Altitude: 34.2° Azimuth: 327.7° Direction: North-North-West

HR4439 is a double main-sequence star in the constellation of Ursa Major.

HR4439 visual magnitude is 5.48. Because of its reltive faintness, HR4439 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 HR4439:

Color of HR4439 ⬤

Magnitude of HR4439 5.48

Class Main-sequence

VISIBILITY RIGHT NOW

HR4439 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 34.2°
Azimuth: 327.7°
Direction: North-North-West

Celestial coordinates and finder chart of HR4439

HR4439 is situated close to the northern celestial pole and, as such, it is visible for most part of the year from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR4439 are provided in the following table:

Right Ascension J2000 11h 32m 20s

Declination J2000 +61° 04’ 57”

Galactic Longitude 138.9°

Galactic Latitude 53.52°

Constellation Ursa Major

The simplified sky map below shows the position of HR4439 in the sky:

Simplified finder chart for HR4439.

Visibility of HR4439 from your location

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

HR4439 is circumpolar and transits at 11:16 UTC (altitude: 80.4°)

Digitized Sky Survey image of HR4439

The image below is a photograph of HR4439 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 HR4439 is 0.002 arcsec per year in Right Ascension and -0.069 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of HR4439. The red arrow shows the motion of HR4439 during the next 10000 years (0.33 arcmin in Right Ascension and -11.50 arcmin in declination);

Distance of HR4439 from the Sun and relative movement

HR4439 is distant 89.71 light years from the Sun and it is moving towards the Sun at the speed of 46 kilometers per second.

Distance (parsec) 27.52 pc

Distance (light year) 89.71 ly

Heliocentric radial velocity -46 km/s

Proper Motion RA 0.002 arcsec/year

Proper Motion Dec -0.069 arcsec/year

Spectral properties of HR4439

HR4439 belongs to spectral class F8 and has a luminosity class of V corresponding to a main-sequence star.

Absolute magnitude 3.28

Spectral Type F8V

Color Index (B-V) 0.5

Temperature of HR4439 6389K

The red dot in the diagram below shows where HR4439 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR4439. Attribution: Richard Powell / CC BY-SA

HR4439 star system properties

HR4439 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 HR4439 double sysyem:

Main star magnitude 5.48

Secondary star magnitude 6.88

Magnitude difference 1.4

Separation 0.5 arcsec

Alternative designations of HR4439

Henry Draper Catalogue HD100203

SAO Catalogue SAO15542

Hipparcos Catalogue HIP56290

Durchmusterung Catalogue BD+61 1246

Gliese Catalogue Gl 431.1A

Aitken Double Star Catalogue ADS8197

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In Evidence

Other stars in Ursa Major