Help Shape the Future of Space Exploration

Join The Planetary Society Now  arrow.png

Join our eNewsletter for updates & action alerts

    Please leave this field empty
The Bruce Murray Space Image Library

Hydra viewed by New Horizons

Filed under New Horizons, pretty pictures, Pluto, global views, Pluto's small moons

Go Back

Hydra viewed by New Horizons

Since its discovery in 2005, Pluto's moon Hydra has been known only as a fuzzy dot of uncertain shape, size, and reflectivity. Imaging during New Horizons' historic transit of the Pluto-Charon system definitively resolved these fundamental properties of Pluto's outermost moon. Long Range Reconnaissance Imager (LORRI) observations from a distance of approximately 640,000 kilometers revealed an irregularly shaped body characterized by significant brightness variations over the surface. With a resolution of 3 kilometers per pixel, the LORRI image shows the tiny potato-shaped moon measures 43 kilometers by 33 kilometers.

Like that of Pluto's largest moon Charon, Hydra's surface is probably covered with water ice. Observed within Hydra's bright regions is a darker circular structure approximately 10 kilometers in diameter. Hydra's reflectivity is intermediate between that of Pluto and Charon.

NASA / JHUAPL / SwRI

Original image data dated on or about July 14, 2015.

Most NASA images are in the public domain. Reuse of this image is governed by NASA's image use policy.

 

Other Related Images

Comments:

Leave a Comment:

You must be logged in to submit a comment. Log in now.

Space in Images

Pretty pictures and
awe-inspiring science.

See More

Join The Planetary Society

Let’s explore the cosmos together!

Become a Member

Connect With Us

Facebook, Twitter, YouTube and more…
Continue the conversation with our online community!