/r/Callisto

Photograph via //r/Callisto

Articles and discussion about Jupiter's moon Callisto.

Callisto is the second largest moon of Jupiter.

Unlike the other Galilean moons, Callisto is not in orbital resonance, is not tidally heated, and lies outside of Jupiter's powerful radiation belts.


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/r/Callisto

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2

How will tidal heating change Callisto? (the other Galilean satellites are migrating outward, eventually likely to catch Callisto into resonance with two or all three of them)

Here's the study I'm referencing:

From our results, the capture of Callisto into resonance appears to be extremely likely (100% of our simulations). The exact timing of its entrance into resonance depends on the precise rate of energy dissipation in the system. Assuming the most recent estimate of the dissipation between Io and Jupiter, the resonant encounter happens at about 1.5 Gyr from now.

0 Comments
2024/05/19
00:53 UTC

1

Unexpected Discoveries On the Moons of Jupiter: Gas Cycles and Weird Glass

0 Comments
2024/05/05
18:26 UTC

2

James Tuttle Keane @jtuttlekeane Shangbiao Sun—Tianwen 4 is a planned Chinese mission to orbit Jupiter’s moon, Callisto (and another spacecraft to fly by Uranus). They’re considering deploying a sub-satellite and doing satellite-satellite ranging to get an amazing high-res gravity field of Callisto!

0 Comments
2023/05/28
10:35 UTC

7

The inevitability of humans on Callisto (illustration from the book "living among giants, by Michael Carroll)

2 Comments
2023/02/18
10:11 UTC

0 Comments
2022/12/30
02:22 UTC

5

Tianwen-4 (previously known as Gan De) - Callisto orbiter / Uranus flyby

0 Comments
2022/09/30
02:16 UTC

5

Books on Callisto

Hello,

I was just wondering if anyone can recommend any good books on Callisto?

Thanks :)

4 Comments
2022/04/09
07:47 UTC

5

Scott Manley talks about Callisto

1 Comment
2022/01/31
19:40 UTC

5

Colonizing Callisto

Do you guys believe that manned exploration of Callisto is feasible within the next ~30 years? If not, how long do you think? Also, do you guys reckon that colonization of Callisto is a good idea after Mars?

Thanks :) Would love to hear you guys comments on this.

6 Comments
2021/11/12
06:02 UTC

9

Book about Callisto that I recommend you to get "Interplanetary Outpost: The Human and Technological Challenges of Exploring the Outer Planets" by Erik Seedhouse

0 Comments
2021/09/13
19:36 UTC

10

Hello there Callisto fans!

I can't believe it took me this long to find this place. I love Callisto and think it's one of the most special places in our Solar System. I could go on at length.

I am sorta writing this backstory to a sci-fi novel/movie about a manned mission to Callisto, and have all sorts of ideas. I'd love to discuss them with you.

15 Comments
2021/09/10
05:13 UTC

4

What NASA Discovered on Callisto | Our Solar System's Moons

0 Comments
2021/09/05
23:43 UTC

6

Torrence Johnson - 1995 - Perhaps Callisto - Going to Jupiter's moons with humans is very very difficult, but not impossible

0 Comments
2021/08/13
16:30 UTC

7

Colonizing Callisto - Third largest moon in the Solar System

1 Comment
2021/05/05
13:52 UTC

11

Chinese mission to Callisto

0 Comments
2020/08/05
22:46 UTC

8

MAGIC - a mission proposal to explore Callisto (credit: james tuttle keane)

1 Comment
2020/08/05
10:04 UTC

7

Gan De - Chinese mission to Callisto

The National Space Science Center (NSSC), Chinese Academy of Sciences (CAS) is in the very early planning stages of a future Chinese space mission to the Jovian system.

https://preview.redd.it/f8xnafems5f51.jpg?width=1268&format=pjpg&auto=webp&s=96cb90bd918dcb8cfda8cd85a13cb8aba57d3bfc

JCO, the Jupiter Callisto Orbiter, first flies by and characterizes several irregular satellites during its Jovian orbital tour. It is then injected into Callisto orbit to characterize its surface and interior, investigate its degree of differentiation and search for the possible existence of an internal ocean. As an option, JCO could release a lander to Callisto’s surface to perform key measurements of chemical composition, clues to understanding the formation scenario of the Galilean moons.

After an extensive Jupiter orbital tour it is foreseen to enter into an orbit around Callisto to investigate the internal structure, as well as the exosphere of Callisto. Tracking data of a Callisto orbiter promises to extend our knowledge of the interior structure of Callisto significantly beyond of what can even be expected from JUICE. A laser altimeter would allow for accurate global topography measurements and enable the use of altimetry cross-overs to substantially improve the precise orbit determination and geodetic parameter recovery. An on-board accelerometer would enable to separate all kinds of non-gravitational accelerations from the gravitational signal and significantly facilitate the dynamical spacecraft modeling.

Callisto geodesy: A simulation study to support further space missions to the Jovian system

Gan De: Science Objectives and Mission Scenarios For China’s Mission to the Jupiter System

https://presentations.copernicus.org/EGU2020/EGU2020-20179_presentation.pdf

0 Comments
2020/08/05
09:57 UTC

5

Proposed orbiter mission to Callisto called MAGIC.

The mission is competing for The Discovery Program funding. More details will be announced on 11 December 2019 at AGU Fall Meeting.

https://agu.confex.com/agu/fm19/meetingapp.cgi/Paper/500346

MAGIC (Magnetics, Altimetry, Gravity and Imaging of Callisto) is a high performance low altitude orbital mission that will investigate Callisto for over a year and address questions of Callisto’s differentiation, state of hydrostatic equilibrium, the presence of an ocean, the age of its surface, and the conditions at the time of its formation. After a 7-year cruise to Jupiter and a series of flybys the proposed spacecraft will enter into a 100 km circular orbit for a few months to obtain imagery, magnetics, altimetry and gravity before lowering into a 50-km near circularpolar orbit for its primary mapping phase of 1 year to obtain four global datasets:imagery, altimetry, magnetometry, and gravity.

0 Comments
2019/11/15
15:28 UTC

2

Article about instrument JANUS on JUICE spacecraft.

This camera will be able to cover 100% of Callisto surface at≤2 km/pixel, 41 % at≤1 km/pixel, 14 % at≤400m/pixel, 6.5% at ≤200 m/pixel, and some targets at resolutions ~ 10 m/pixel, with 4 colour imaging at medium resolutions.

https://ssed.gsfc.nasa.gov/IPM/PDF/1054.pdf

So we are going to get good pictures and maps of Callisto after multiple fly-by maneuvers at Callisto after 2030

0 Comments
2019/11/15
15:11 UTC

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