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

HR4220

HR4220 is a double sub-giant star in the constellation of Carina.

HR4220 visual magnitude is 5.23. Because of its reltive faintness, HR4220 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 HR4220:

5.23
Sub-giant
HR4220 is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of HR4220

HR4220 is situated south of the celestial equator, as such, it is more easily visible from the southern emisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR4220 are provided in the following table:

10h 46m 29s
-64° 15’ 47”
289.88°
-4.61°
Carina

The simplified sky map below shows the position of HR4220 in the sky:

Finder chart HR4220 star
Simplified finder chart for HR4220.

Visibility of HR4220 from your location

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

HR4220 is currently not visible from Greenwich, United Kingdom [change]

Digitized Sky Survey image of HR4220

The image below is a photograph of HR4220 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 HR4220 is -0.008 arcsec per year in Right Ascension and 0.012 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR4220 star
DSS2 image of HR4220. The red arrow shows the motion of HR4220 during the next 10000 years (-1.33 arcmin in Right Ascension and 2.00 arcmin in declination);

Distance of HR4220 from the Sun and relative movement

HR4220 is distant 428.95 light years from the Sun and it is moving far from the Sun at the speed of 12 kilometers per second.

131.58 pc
428.95 ly
12 km/s
-0.008 arcsec/year
0.012 arcsec/year

Spectral properties of HR4220

HR4220 belongs to spectral class B7 and has a luminosity class of IV corresponding to a sub-giant star.

-0.37
B7IV
11092K

The red dot in the diagram below shows where HR4220 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR4220. Attribution: Richard Powell / CC BY-SA

HR4220 star system properties

HR4220 is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the HR4220 double sysyem:

5.23
5.33
0.1
0.1 arcsec

Alternative designations of HR4220

SAO251117
SAO251117