HR4545

HR4545 is a double star in the constellation of Ursa Major.

HR4545 visual magnitude is 6.27. Because of its reltive faintness, HR4545 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 HR4545:

Color of HR4545 ⬤

Magnitude of HR4545 6.27

Class

VISIBILITY RIGHT NOW HR4545 is above the horizon from Greenwich, United Kingdom [change]. Altitude: 45°.

Celestial coordinates and finder chart of HR4545

HR4545 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 HR4545 are provided in the following table:

Right Ascension J2000 11h 51m 09s

Declination J2000 +33° 22’ 30”

Galactic Longitude 183.62°

Galactic Latitude 75.58°

Constellation Ursa Major

The simplified sky map below shows the position of HR4545 in the sky:

Simplified finder chart for HR4545.

Visibility of HR4545 from your location

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

Today's HR4545 rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 56.6° RISE 14:02

Max altitude: 71.9° TRANSIT 23:42

Azimuth: 303.4° SET 9:26

RIGHT NOW HR4545 is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR4545

The image below is a photograph of HR4545 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 HR4545 is -0.021 arcsec per year in Right Ascension and 0.019 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of HR4545. The red arrow shows the motion of HR4545 during the next 10000 years (-3.50 arcmin in Right Ascension and 3.17 arcmin in declination);

Distance of HR4545 from the Sun and relative movement

HR4545 is distant 205.42 light years from the Sun and it is moving far from the Sun at the speed of 2 kilometers per second.

Distance (parsec) 63.01 pc

Distance (light year) 205.42 ly

Heliocentric radial velocity 2 km/s

Proper Motion RA -0.021 arcsec/year

Proper Motion Dec 0.019 arcsec/year

Spectral properties of HR4545

HR4545 belongs to spectral class A HR4545 is also a so called metallic star.

Absolute magnitude 2.27

Spectral Type A

Color Index (B-V) 0.32

Temperature of HR4545 7337K

The red dot in the diagram below shows where HR4545 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR4545. Attribution: Richard Powell / CC BY-SA

HR4545 star system properties

HR4545 is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the HR4545 double sysyem:

Main star magnitude 6.27

Secondary star magnitude 8.77

Magnitude difference 2.5

Separation 46.6 arcsec

Alternative designations of HR4545

Henry Draper Catalogue HD102942

SAO Catalogue SAO62731

Hipparcos Catalogue HIP57805

Durchmusterung Catalogue BD+34 2264

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In Evidence

Other stars in Ursa Major