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🌎  Greenwich, United Kingdom [change]


HR821 is a main-sequence star in the constellation of Horologium.

HR821 visual magnitude is 6.15. Because of its reltive faintness, HR821 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 HR821:

HR821 is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of HR821

HR821 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 HR821 are provided in the following table:

02h 44m 10s
-52° 34’ 14”

The simplified sky map below shows the position of HR821 in the sky:

Finder chart HR821 star
Simplified finder chart for HR821.

Visibility of HR821 from your location

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

HR821 is currently not visible from Greenwich, United Kingdom [change]

Digitized Sky Survey image of HR821

The image below is a photograph of HR821 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 HR821 is -0.012 arcsec per year in Right Ascension and -0.015 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR821 star
DSS2 image of HR821. The red arrow shows the motion of HR821 during the next 10000 years (-2.00 arcmin in Right Ascension and -2.50 arcmin in declination);

Distance of HR821 from the Sun and relative movement

HR821 is distant 404.47 light years from the Sun and it is moving far from the Sun at the speed of 10 kilometers per second.

124.07 pc
404.47 ly
10 km/s
-0.012 arcsec/year
-0.015 arcsec/year

Spectral properties of HR821

HR821 belongs to spectral class A2 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where HR821 is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of HR821. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR821