Your guide to the Solar System and the night sky
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🌎  Greenwich, United Kingdom [change]

HR1722

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:

5.48
Giant
HR1722 is above the horizon from Greenwich, United Kingdom [change]. Altitude: 62°.

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:

05h 18m 15s
+42° 47’ 31”
165.38°
2.95°
Auriga

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

Finder chart HR1722 star
Simplified finder chart for HR1722.

Visibility of HR1722 from your location

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

HR1722 is circumpolar and transits at 04:15 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.

Image of HR1722 star
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.

212.77 pc
693.62 ly
-38 km/s
0.038 arcsec/year
-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.

-1.16
M4III
3581K

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

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

Alternative designations of HR1722

SAO40214
SAO40214