Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
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All Constellations » Hydrus » 


HR87 is a giant star in the constellation of Hydrus.

HR87 visual magnitude is 5.97. Because of its reltive faintness, HR87 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 HR87:

HR87 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Celestial coordinates and finder chart of HR87

HR87 is situated close to the southern celestial pole and, as such, it is easilty visible for most part of the year from the southern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR87 are provided in the following table:

00h 21m 28s
-77° 25’ 36”

The simplified sky map below shows the position of HR87 in the sky:

Finder chart HR87 star
Simplified finder chart for HR87.

Visibility of HR87 from your location

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

HR87 is currently not visible from Greenwich, United Kingdom edit_location_alt

Digitized Sky Survey image of HR87

The image below is a photograph of HR87 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 HR87 is 0.002 arcsec per year in Right Ascension and -0.01 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR87 star
DSS2 image of HR87. The red arrow shows the motion of HR87 during the next 10000 years (0.33 arcmin in Right Ascension and -1.67 arcmin in declination);

Distance of HR87 from the Sun and relative movement

HR87 is distant 696.58 light years from the Sun and it is moving far from the Sun at the speed of 21 kilometers per second.

213.68 pc
696.58 ly
21 km/s
0.002 arcsec/year
-0.01 arcsec/year

Spectral properties of HR87

HR87 belongs to spectral class K3 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR87 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR87. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR87