# Questions tagged [ceres]

Questions about the only dwarf planet within Neptune's orbit and formerly the largest asteroid in the Solar System, comprising 1/3 of the mass of the asteroid belt. Ceres orbits between Mars and Jupiter.

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3 votes
1 answer
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### The sky as seen from Ceres

Am I correct in calculating that the "north star" for Ceres, or where the rotational axis points, is in Draco, more specifically somewhere between C Draconis and D Draconis? What software ...
• 131
3 votes
1 answer
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### I am trying to find the dates for a solar eclipse where the Earth and Ceres are in line

In the game i'm working on a particular event happens during a solar eclipse while the Earth and Ceres are in line, or a few days before. I'm looking for dates between 2100 and 2300. Anyone know a way ...
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1 vote
0 answers
31 views

### What's the largest object crossing Ceres' hill sphere?

What's the largest and/or most massive main belt object whose Ceres MOID is within Ceres' hill sphere radius (within ~0.0015 a.u. (140,000 mi) (224,000 km))? Three-dimensionally, of course.
• 1,548
23 votes
3 answers
5k views

### If we replaced the Moon with Ceres, how close would Ceres have to orbit to cause the same tides?

How close to Earth would Ceres have to be to cause tides of the same strength as by the Moon, above the region it orbits? Ceres has 1.3% the Moon's mass, but that doesn't mean it must be at 1.3% the ...
• 1,548
2 votes
1 answer
121 views

### How did the measured diameter of Ceres evolve over time?

Based on the Wikipedia page of Ceres, Herschel measured a diameter of 260 kilometers for Ceres, and Schröter measured 2613 kilometers. I do remember seeing at least a half-dozen estimates of the ...
• 17.4k
4 votes
2 answers
205 views

### What are the white reflections on Ceres?

What are the white reflections on Ceres? https://solarsystem.nasa.gov/planets/dwarf-planets/ceres/overview/
0 votes
1 answer
166 views

### What's the composition of Ceres?

Strangely, there isn't a lot of information on Ceres on the internet. I want to know the specific percentages of its composition. Thanks in advance!
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6 votes
1 answer
182 views

### What aliphatic compounds were found on Ceres, and how where they identified?

Los Angeles Times's article NASA's Dawn mission finds life's building blocks on dwarf planet Ceres says; While the scientists aren’t sure exactly what the compounds are, the fingerprint is ...
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6 votes
1 answer
325 views

### Is Ceres in the inner solar system or outer solar system?

Do we consider the dwarf planet Ceres to be in the inner solar system or outer solar system (or possibly neither / in between). It is located within the asteroid belt, but is the asteroid belt part ...
• 4,355
3 votes
1 answer
190 views

### Would I actually be able to see Ceres without shining a really bright torch onto it?

NASA's put out a semi-CGI video of a Ceres flyby using material from the Dawn mission. Now I realise that visibility is relative, even on Earth: I can walk into my basement and not be able to see ...
5 votes
2 answers
248 views

### Age of Occator Crater

Has any official information been published regarding the estimated age of the Occator crater on Ceres? I ran some quick searches but couldn't find anything putting a definitive (or even speculative) ...
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12 votes
2 answers
164 views

### Subterranean Oceans On Other Planets/Planetoids: How Do Astronomers Deduce This

Recently I have been looking into planetoids in our asteroid belt and I have found one that caught my interest, Ceres. One of the main points that was said about it was that it had a subterranean ...
4 votes
1 answer
680 views

### Is Ceres a terrestrial-type (dwarf) planet?

Does Ceres belong to the terrestrial-type celestial bodies?
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3 votes
1 answer
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### How easy is it to mine water on Ceres?

It has been suggested by some futuristic or sci fi leaning thinkers, that Ceres' surface might be mined for water to support human exploration and settlement of space. But NASA's Dawn mission and ...
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4 votes
1 answer
427 views

### How long does it take Dawn to orbit Ceres?

I haven't been able to find the orbit time of Dawn around Ceres. Do you know how long it takes?
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