HR4486

HR4486 is a multiple hypergiant star in the constellation of Ursa Major.

HR4486 visual magnitude is 6.44. Because of its reltive faintness, HR4486 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 HR4486:

Color of HR4486 ⬤

Magnitude of HR4486 6.44

Class Hypergiant

VISIBILITY RIGHT NOW HR4486 is above the horizon from Greenwich, United Kingdom [change]. Altitude: 54°.

Celestial coordinates and finder chart of HR4486

HR4486 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 HR4486 are provided in the following table:

Right Ascension J2000 11h 38m 44s

Declination J2000 +45° 06’ 30”

Galactic Longitude 157.05°

Galactic Latitude 66.91°

Constellation Ursa Major

The simplified sky map below shows the position of HR4486 in the sky:

Simplified finder chart for HR4486.

Visibility of HR4486 from your location

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

HR4486 is circumpolar and transits at 23:45 UTC (altitude: 83.6°)

Digitized Sky Survey image of HR4486

The image below is a photograph of HR4486 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 HR4486 is -0.594 arcsec per year in Right Ascension and 0.026 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

DSS2 image of HR4486. The red arrow shows the motion of HR4486 during the next 1000 years (-9.90 arcmin in Right Ascension and 0.43 arcmin in declination);

Distance of HR4486 from the Sun and relative movement

HR4486 is distant 75.92 light years from the Sun and it is moving towards the Sun at the speed of 18 kilometers per second.

Distance (parsec) 23.29 pc

Distance (light year) 75.92 ly

Heliocentric radial velocity -18 km/s

Proper Motion RA -0.594 arcsec/year

Proper Motion Dec 0.026 arcsec/year

Spectral properties of HR4486

HR4486 belongs to spectral class G0 and has a luminosity class of V corresponding to a hypergiant star.

Absolute magnitude 4.60

Spectral Type G0V

Color Index (B-V) 0.56

Temperature of HR4486 6129K

The red dot in the diagram below shows where HR4486 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR4486. Attribution: Richard Powell / CC BY-SA

HR4486 star system properties

HR4486 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 HR4486 double sysyem:

Main star magnitude 6.44

Secondary star magnitude 8.34

Magnitude difference 1.9

Separation 9.4 arcsec

Alternative designations of HR4486

Henry Draper Catalogue HD101177

SAO Catalogue SAO43841

Hipparcos Catalogue HIP56809

Durchmusterung Catalogue BD+45 1947

Gliese Catalogue Gl 433.2A

Aitken Double Star Catalogue ADS8250

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Other stars in Ursa Major