HR4191

HR4191 is a multiple giant star in the constellation of Ursa Major.

HR4191 visual magnitude is 5.18. Because of its reltive faintness, HR4191 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 HR4191:

Color of HR4191 ⬤

Magnitude of HR4191 5.18

Class Giant

VISIBILITY RIGHT NOW HR4191 is above the horizon from Greenwich, United Kingdom [change]. Altitude: 85°.

Celestial coordinates and finder chart of HR4191

HR4191 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 HR4191 are provided in the following table:

Right Ascension J2000 10h 43m 32s

Declination J2000 +46° 12’ 14”

Galactic Longitude 167.29°

Galactic Latitude 58.39°

Constellation Ursa Major

The simplified sky map below shows the position of HR4191 in the sky:

Simplified finder chart for HR4191.

Visibility of HR4191 from your location

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

HR4191 is circumpolar and transits at 22:19 UTC (altitude: 84.7°)

Digitized Sky Survey image of HR4191

The image below is a photograph of HR4191 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 HR4191 is -0.269 arcsec per year in Right Ascension and -0.066 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

DSS2 image of HR4191. The red arrow shows the motion of HR4191 during the next 1000 years (-4.48 arcmin in Right Ascension and -1.10 arcmin in declination);

Distance of HR4191 from the Sun and relative movement

HR4191 is distant 116.22 light years from the Sun and it is moving far from the Sun at the speed of 4 kilometers per second.

Distance (parsec) 35.65 pc

Distance (light year) 116.22 ly

Heliocentric radial velocity 4 km/s

Proper Motion RA -0.269 arcsec/year

Proper Motion Dec -0.066 arcsec/year

Spectral properties of HR4191

HR4191 belongs to spectral class F5 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude 2.42

Spectral Type F5III

Color Index (B-V) 0.33

Temperature of HR4191 7276K

The red dot in the diagram below shows where HR4191 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR4191. Attribution: Richard Powell / CC BY-SA

HR4191 star system properties

HR4191 is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the HR4191 double sysyem:

Main star magnitude 5.18

Secondary star magnitude 7.98

Magnitude difference 2.8

Separation 286.9 arcsec

Alternative designations of HR4191

Henry Draper Catalogue HD92787

SAO Catalogue SAO43444

Hipparcos Catalogue HIP52469

Durchmusterung Catalogue BD+46 1657

FK5 Catalogue 1276

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In Evidence

Other stars in Ursa Major