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 » Puppis » 


HR3121 is a giant star in the constellation of Puppis.

HR3121 visual magnitude is 5.17. Because of its reltive faintness, HR3121 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 HR3121:

HR3121 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Celestial coordinates and finder chart of HR3121

HR3121 is situated south of the celestial equator, as such, it is more easily visible from the southern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR3121 are provided in the following table:

07h 57m 51s
-45° 34’ 40”

The simplified sky map below shows the position of HR3121 in the sky:

Finder chart HR3121 star
Simplified finder chart for HR3121.

Visibility of HR3121 from your location

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

HR3121 is currently not visible from Greenwich, United Kingdom edit_location_alt

Digitized Sky Survey image of HR3121

The image below is a photograph of HR3121 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 HR3121 is -0.006 arcsec per year in Right Ascension and 0.02 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR3121 star
DSS2 image of HR3121. The red arrow shows the motion of HR3121 during the next 10000 years (-1.00 arcmin in Right Ascension and 3.33 arcmin in declination);

Distance of HR3121 from the Sun and relative movement

HR3121 is distant 299.91 light years from the Sun and it is moving far from the Sun at the speed of 51 kilometers per second.

92.00 pc
299.91 ly
51 km/s
-0.006 arcsec/year
0.02 arcsec/year

Spectral properties of HR3121

HR3121 belongs to spectral class K2 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR3121 is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of HR3121. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR3121