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

HR238

HR238 is a variable sub-giant star in the constellation of Cassiopeia.

HR238 visual magnitude is 6.39. Because of its reltive faintness, HR238 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 HR238:

6.39
Sub-giant
HR238 is above the horizon from Greenwich, United Kingdom [change]. Altitude: 14°.

Celestial coordinates and finder chart of HR238

HR238 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 HR238 are provided in the following table:

00h 50m 57s
+51° 30’ 29”
122.85°
-11.36°
Cassiopeia

The simplified sky map below shows the position of HR238 in the sky:

Finder chart HR238 star
Simplified finder chart for HR238.

Visibility of HR238 from your location

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

HR238 is circumpolar and transits at 15:40 UTC (altitude: 90.0°)

Digitized Sky Survey image of HR238

The image below is a photograph of HR238 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 HR238 is 0.135 arcsec per year in Right Ascension and -0.003 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of HR238 star
DSS2 image of HR238. The red arrow shows the motion of HR238 during the next 1000 years (2.25 arcmin in Right Ascension and -0.05 arcmin in declination);

Distance of HR238 from the Sun and relative movement

HR238 is distant 217.33 light years from the Sun and it is moving far from the Sun at the speed of 2 kilometers per second.

66.67 pc
217.33 ly
2 km/s
0.135 arcsec/year
-0.003 arcsec/year

Spectral properties of HR238

HR238 belongs to spectral class F2 and has a luminosity class of IV corresponding to a sub-giant star.

2.27
F2IV
7591K

The red dot in the diagram below shows where HR238 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR238. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR238

SAO21767
SAO21767