HR238

Altitude: 69.6° Azimuth: 76.8° Direction: East-North-East

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:

Color of HR238 ⬤

Magnitude of HR238 6.39

Class Sub-giant

VISIBILITY RIGHT NOW

HR238 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 69.6°
Azimuth: 76.8°
Direction: East-North-East

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:

Right Ascension J2000 00h 50m 57s

Declination J2000 +51° 30’ 29”

Galactic Longitude 122.85°

Galactic Latitude -11.36°

Constellation Cassiopeia

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

Simplified finder chart for HR238.

Visibility of HR238 from your location

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

HR238 is circumpolar and transits at 19:45 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.

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.

Distance (parsec) 66.67 pc

Distance (light year) 217.33 ly

Heliocentric radial velocity 2 km/s

Proper Motion RA 0.135 arcsec/year

Proper Motion Dec -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.

Absolute magnitude 2.27

Spectral Type F2IV

Color Index (B-V) 0.28

Temperature of HR238 7591K

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

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

Alternative designations of HR238

Henry Draper Catalogue HD4818

SAO Catalogue SAO21767

Hipparcos Catalogue HIP3965

Durchmusterung Catalogue BD+50 161

General Catalogue of Variable Stars V526 Cas

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In Evidence

Other stars in Cassiopeia