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

HR207

HR207 is a hypergiant star in the constellation of Cassiopeia.

HR207 visual magnitude is 6.39. Because of its reltive faintness, HR207 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 HR207:

6.39
Hypergiant
HR207 is above the horizon from Greenwich, United Kingdom [change]. Altitude: 22°.

Celestial coordinates and finder chart of HR207

HR207 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 HR207 are provided in the following table:

00h 46m 42s
+59° 34’ 27”
122.33°
-3.29°
Cassiopeia

The simplified sky map below shows the position of HR207 in the sky:

Finder chart HR207 star
Simplified finder chart for HR207.

Visibility of HR207 from your location

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

HR207 is circumpolar and transits at 15:36 UTC (altitude: 81.9°)

Digitized Sky Survey image of HR207

The image below is a photograph of HR207 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 HR207 is -0.008 arcsec per year in Right Ascension and -0.001 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of HR207 star
DSS2 image of HR207. The red arrow shows the motion of HR207 during the next 100000 years (-13.33 arcmin in Right Ascension and -1.67 arcmin in declination);

Distance of HR207 from the Sun and relative movement

HR207 is distant 32,600,000.00 light years from the Sun and it is moving towards the Sun at the speed of 15 kilometers per second.

10,000,000.00 pc
32,600,000.00 ly
-15 km/s
-0.008 arcsec/year
-0.001 arcsec/year

Spectral properties of HR207

HR207 belongs to spectral class G0 and has a luminosity class of I corresponding to a hypergiant star.

-23.61
G0I
4537K

The red dot in the diagram below shows where HR207 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR207. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR207

SAO21693
SAO21693