Questions tagged [asteroids]

Questions regarding relatively small rocky bodies in an orbit around the Sun.

14 questions with no upvoted or accepted answers
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1answer
167 views

What if there was an asteroid belt with the mass of a planet?

In the past, the asteroid belt was thought to be the remains of a shattered planet. Of course, that was all pseudoscience, the mass of the asteroid belt being 4% of the moon. I've been wondering, what ...
4
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103 views

Is 486958 Arrokoth (2014 MU69 aka Ultima Thule) the only solar-system object determined to be binary by occultation?

The asteroid 486958 Arrokoth was discovered to be binary by astronomers lugging a bunch of telescopes around (I think) camping with them. The timing offered additional astrometry for the orbit ...
4
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0answers
64 views

What's the number density of `Oumuamua like objects?

Recently, the fly-through the Solar system of the inter-stellar object (ISO) `Oumuamua caused quite a stir in the astronomy community. I wonder whether there are reliable estimates for the (local) ...
3
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0answers
107 views

Help identifying a very slow-moving object during meteor shower photography

I just wonder if anyone could shed any light on this puzzle. Two nights ago whilst I was out photographing the Lyrids meteor shower from the UK something else showed up on my images when I checked ...
3
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0answers
50 views

Are there any estimates for the combined mass of all near earth objects (NEOs)?

I tried looking around but couldn't find any sources attempting to answer this particular question. It's obviously impossible to know the exact answer, but all I'm looking for is an estimate. My ...
3
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0answers
69 views

How often do comet occultations of stars happen?

By travelling to specific places, astronomers can see three thousand star comet transition events every year at m15 for the major (50km+) comets and asteroids averaging about 20 seconds, perhaps that'...
2
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0answers
91 views

Identify moving object in the sky at night?

So last night I was looking at the sky at about 8PM EST, and I noticed this really tiny object moving pretty fast from left to right, just between the two stars in the photo. It's very difficult to ...
2
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25 views

Asteroid identification in fits image

I have a fits image, and I need to identify an asteroid. What characteristics do I look out for?
2
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77 views

What is the average Ni-Fe crystal length in iron meteorites?

Iron-core meteorites display an awesome criss-cross pattern known as the Widmanstätten pattern, shown below: (photo by Dr. Patrick M. Len, taken from Wikipedia) I TA for an intro-level astronomy/...
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29 views

How quickly can a ring system be made?

I've seen elsewhere that if a terrestrial planet had a ring system, it would be very difficult (if not impossible) for life to evolve due to the shadow the rings would cast on the temperate zone in ...
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60 views

Are these stars in MASCOT image of Ryugu?

Are these stars in this MASCOT image of Ryugu? Larger image: https://www.sciencealert.com/images/2019-08/processed/RocksOfRyuguStranglyFamiliar_1024.jpg They seem too bright to be stars (if the ...
1
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0answers
42 views

Do we finally have a decent set of parameters of 162173 Ryugu?

"Give a man a watch and he will know the time; give him two and he will never be sure" - this was my impression when reading the Wikipedia article on 162173 Ryugu. Mean diameter: 0.865±0....
1
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1answer
93 views

Do planetary magnetic fields slow the movement of conductive extraplanetary moving objects via induction?

A fixed magnetic field will induce an electrical current in a conductive object moving through the field. The strength of the eddy currents will depend on the shape and composition of the conductor ...
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22 views

What is the typical chemical composition of the most common asteroid types?

I'm trying to make a semi-scientific accurate game where you can find/mine asteroids. I want the composition of asteroids, and how common they are to be correct. Or at least as close to correct as ...