HR240

HR240 is a main-sequence star in the constellation of Cepheus.

HR240 visual magnitude is 5.62. Because of its reltive faintness, HR240 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 HR240:

Color of HR240 ⬤

Magnitude of HR240 5.62

Class Main-sequence

VISIBILITY RIGHT NOW HR240 is above the horizon from Greenwich, United Kingdom [change]. Altitude: 47°.

Celestial coordinates and finder chart of HR240

HR240 is situated close to the northern celestial pole and, as such, it is visible for most part of the year from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR240 are provided in the following table:

Right Ascension J2000 00h 54m 53s

Declination J2000 +83° 42’ 25”

Galactic Longitude 123.03°

Galactic Latitude 20.84°

Constellation Cepheus

The simplified sky map below shows the position of HR240 in the sky:

Simplified finder chart for HR240.

Visibility of HR240 from your location

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

HR240 is circumpolar and transits at 12:40 UTC (altitude: 57.8°)

Digitized Sky Survey image of HR240

The image below is a photograph of HR240 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 HR240 is 0.062 arcsec per year in Right Ascension and -0.022 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of HR240. The red arrow shows the motion of HR240 during the next 10000 years (10.33 arcmin in Right Ascension and -3.67 arcmin in declination);

Distance of HR240 from the Sun and relative movement

HR240 is distant 245.11 light years from the Sun and it is moving far from the Sun at the speed of 12 kilometers per second.

Distance (parsec) 75.19 pc

Distance (light year) 245.11 ly

Heliocentric radial velocity 12 km/s

Proper Motion RA 0.062 arcsec/year

Proper Motion Dec -0.022 arcsec/year

Spectral properties of HR240

HR240 belongs to spectral class A4 and has a luminosity class of V corresponding to a main-sequence star.

Absolute magnitude 1.24

Spectral Type A4V

Color Index (B-V) 0.09

Temperature of HR240 9125K

The red dot in the diagram below shows where HR240 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR240. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR240

Henry Draper Catalogue HD4853

SAO Catalogue SAO143

Hipparcos Catalogue HIP4283

Durchmusterung Catalogue BD+82 20

FK5 Catalogue 3942

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In Evidence

Other stars in Cepheus