HR3939

HR3939 is a giant star in the constellation of Ursa Major.

HR3939 visual magnitude is 5.48. Because of its reltive faintness, HR3939 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 HR3939:

Color of HR3939 ⬤

Magnitude of HR3939 5.48

Class Giant

VISIBILITY RIGHT NOW HR3939 is above the horizon from Greenwich, United Kingdom [change]. Altitude: 41°.

Celestial coordinates and finder chart of HR3939

HR3939 is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR3939 are provided in the following table:

Right Ascension J2000 09h 59m 51s

Declination J2000 +56° 48’ 42”

Galactic Longitude 156.48°

Galactic Latitude 47.6°

Constellation Ursa Major

The simplified sky map below shows the position of HR3939 in the sky:

Simplified finder chart for HR3939.

Visibility of HR3939 from your location

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

HR3939 is circumpolar and transits at 21:59 UTC (altitude: 84.7°)

Digitized Sky Survey image of HR3939

The image below is a photograph of HR3939 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 HR3939 is -0.029 arcsec per year in Right Ascension and -0.026 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of HR3939. The red arrow shows the motion of HR3939 during the next 10000 years (-4.83 arcmin in Right Ascension and -4.33 arcmin in declination);

Distance of HR3939 from the Sun and relative movement

HR3939 is distant 510.17 light years from the Sun and it is moving towards the Sun at the speed of 13 kilometers per second.

Distance (parsec) 156.49 pc

Distance (light year) 510.17 ly

Heliocentric radial velocity -13 km/s

Proper Motion RA -0.029 arcsec/year

Proper Motion Dec -0.026 arcsec/year

Spectral properties of HR3939

HR3939 belongs to spectral class K5 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude -0.49

Spectral Type K5III

Color Index (B-V) 1.46

Temperature of HR3939 3855K

The red dot in the diagram below shows where HR3939 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR3939. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR3939

Henry Draper Catalogue HD86378

SAO Catalogue SAO27464

Hipparcos Catalogue HIP49005

Durchmusterung Catalogue BD+57 1242

FK5 Catalogue 2802

How to support us

In Evidence

Other stars in Ursa Major