HR1722

Altitude: 28.0° Azimuth: 55.4° Direction: North-East

HR1722 is a variable giant star in the constellation of Auriga.

HR1722 visual magnitude is 5.48. Because of its reltive faintness, HR1722 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 HR1722:

Color of HR1722 ⬤

Magnitude of HR1722 5.48

Class Giant

VISIBILITY RIGHT NOW

HR1722 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 28.0°
Azimuth: 55.4°
Direction: North-East

Celestial coordinates and finder chart of HR1722

HR1722 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 HR1722 are provided in the following table:

Right Ascension J2000 05h 18m 15s

Declination J2000 +42° 47’ 31”

Galactic Longitude 165.38°

Galactic Latitude 2.95°

Constellation Auriga

The simplified sky map below shows the position of HR1722 in the sky:

Simplified finder chart for HR1722.

Visibility of HR1722 from your location

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

HR1722 is circumpolar and transits at 05:14 UTC (altitude: 81.3°)

Digitized Sky Survey image of HR1722

The image below is a photograph of HR1722 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 HR1722 is 0.038 arcsec per year in Right Ascension and -0.023 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of HR1722. The red arrow shows the motion of HR1722 during the next 10000 years (6.33 arcmin in Right Ascension and -3.83 arcmin in declination);

Distance of HR1722 from the Sun and relative movement

HR1722 is distant 693.62 light years from the Sun and it is moving towards the Sun at the speed of 38 kilometers per second.

Distance (parsec) 212.77 pc

Distance (light year) 693.62 ly

Heliocentric radial velocity -38 km/s

Proper Motion RA 0.038 arcsec/year

Proper Motion Dec -0.023 arcsec/year

Spectral properties of HR1722

HR1722 belongs to spectral class M4 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude -1.16

Spectral Type M4III

Color Index (B-V) 1.65

Temperature of HR1722 3581K

The red dot in the diagram below shows where HR1722 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR1722. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR1722

Henry Draper Catalogue HD34269

SAO Catalogue SAO40214

Hipparcos Catalogue HIP24738

Durchmusterung Catalogue BD+42 1239

General Catalogue of Variable Stars PU Aur

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In Evidence

Other stars in Auriga