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a real star, in your favourite constellation

Name a Star in Hydrus

Pick a real, catalogued star in Hydrus, give it a name and a message, and receive an instant certificate, a sky chart showing exactly where it sits, and a shareable star page. Yours alone, forever.

Find your star in Hydrus →
663 stars available now brightest open star mag 2.82 best seen December
663
Stars available
Real, catalogued stars in Hydrus you can name today. Each one given to only one person, ever.
mag 2.82
Brightest open star
The brightest unclaimed star here is HD 2151. The lower the magnitude, the brighter to the eye.
December
Best seen
A deep-southern constellation, best (or only) seen from the southern hemisphere.

About Hydrus

Hydrus is one of the 88 official constellations that map the night sky.

Whichever star you choose, it becomes a fixed point you can return to night after night. A small, real piece of Hydrus attached to a name that means something to you.

How naming a star works

1
Choose your star

Search the catalogue and pick a real star in Hydrus.

2
Name & dedicate it

Add a name and a personal message.

3
Get it instantly

Certificate, sky chart and star page. Delivered in minutes.

three instant editions

From $25 · delivered in minutes

Digital, Twin Stars, or the Gift Pack. All delivered instantly by email, with a certificate and sky chart for the star you choose in Hydrus.

Name your star →

Questions about naming a star in Hydrus

Can I really name a star in Hydrus?There are over 663 catalogued stars in Hydrus available to name right now. You choose one, name it, and it’s recorded uniquely to you in the Caelum Star Registry.
Is this an official scientific name?No, and we’ll always be straight with you about that. Only the International Astronomical Union officially names stars. Caelum is a beautiful, heartfelt keepsake: your name is held in our registry and never given to anyone else.
When can I see Hydrus in the sky?Hydrus climbs highest in the evening around December, and is best placed for the southern hemisphere. Your star page even shows when it’s visible from your exact location tonight.
An honest keepsake. Caelum is a meaningful gift and a real star from published astronomical catalogues. But it is not an official IAU scientific designation. Only the International Astronomical Union officially names stars. We think the gift means more when it’s honest.

Name a star in another constellation

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