HR3645

HR3645 is a hypergiant star in the constellation of Ursa Major.

HR3645 visual magnitude is 5.96. Because of its reltive faintness, HR3645 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 HR3645:

Color of HR3645 ⬤

Magnitude of HR3645 5.96

Class Hypergiant

VISIBILITY RIGHT NOW HR3645 is above the horizon from Greenwich, United Kingdom [change]. Altitude: 52°.

Celestial coordinates and finder chart of HR3645

HR3645 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 HR3645 are provided in the following table:

Right Ascension J2000 09h 15m 52s

Declination J2000 +72° 56’ 45”

Galactic Longitude 139.99°

Galactic Latitude 36.14°

Constellation Ursa Major

The simplified sky map below shows the position of HR3645 in the sky:

Simplified finder chart for HR3645.

Visibility of HR3645 from your location

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

HR3645 is circumpolar and transits at 21:15 UTC (altitude: 68.5°)

Digitized Sky Survey image of HR3645

The image below is a photograph of HR3645 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 HR3645 is -0.085 arcsec per year in Right Ascension and -0.063 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of HR3645. The red arrow shows the motion of HR3645 during the next 10000 years (-14.17 arcmin in Right Ascension and -10.50 arcmin in declination);

Distance of HR3645 from the Sun and relative movement

HR3645 is distant 290.81 light years from the Sun

Distance (parsec) 89.21 pc

Distance (light year) 290.81 ly

Proper Motion RA -0.085 arcsec/year

Proper Motion Dec -0.063 arcsec/year

Spectral properties of HR3645

HR3645 belongs to spectral class F0 and has a luminosity class of III corresponding to a hypergiant star.

Absolute magnitude 1.21

Spectral Type F0III

Color Index (B-V) 0.18

Temperature of HR3645 8321K

The red dot in the diagram below shows where HR3645 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR3645. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR3645

Henry Draper Catalogue HD78935

SAO Catalogue SAO6792

Hipparcos Catalogue HIP45461

Durchmusterung Catalogue BD+73 452

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In Evidence

Other stars in Ursa Major