HR4072

HR4072 is a variable hypergiant star in the constellation of Ursa Major.

HR4072 visual magnitude is 4.97. Because of its moderate brightness, HR4072 should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The table below summarizes the key facts about HR4072:

Color of HR4072 ⬤

Magnitude of HR4072 4.97

Class Hypergiant

VISIBILITY RIGHT NOW HR4072 is above the horizon from Greenwich, United Kingdom [change]. Altitude: 61°.

Celestial coordinates and finder chart of HR4072

HR4072 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 HR4072 are provided in the following table:

Right Ascension J2000 10h 24m 07s

Declination J2000 +65° 33’ 59”

Galactic Longitude 143.54°

Galactic Latitude 45.22°

Constellation Ursa Major

The simplified sky map below shows the position of HR4072 in the sky:

Simplified finder chart for HR4072.

Visibility of HR4072 from your location

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

HR4072 is circumpolar and transits at 22:15 UTC (altitude: 75.9°)

Digitized Sky Survey image of HR4072

The image below is a photograph of HR4072 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 HR4072 is -0.008 arcsec per year in Right Ascension and -0.022 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of HR4072. The red arrow shows the motion of HR4072 during the next 10000 years (-1.33 arcmin in Right Ascension and -3.67 arcmin in declination);

Distance of HR4072 from the Sun and relative movement

HR4072 is distant 300.74 light years from the Sun

Distance (parsec) 92.25 pc

Distance (light year) 300.74 ly

Proper Motion RA -0.008 arcsec/year

Proper Motion Dec -0.022 arcsec/year

Spectral properties of HR4072

HR4072 belongs to spectral class A0 HR4072 is also a SiSrHg chemically peculiar star.

Absolute magnitude 0.15

Spectral Type A0

Color Index (B-V) -0.06

Temperature of HR4072 10941K

The red dot in the diagram below shows where HR4072 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR4072. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR4072

Henry Draper Catalogue HD89822

SAO Catalogue SAO15163

Hipparcos Catalogue HIP50933

Durchmusterung Catalogue BD+66 664

Gliese Catalogue Wo 9327

FK5 Catalogue 387

General Catalogue of Variable Stars 4839

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Other stars in Ursa Major