Earths 2nd Moon? - Unmanned Spaceflight.com

Earths 2nd Moon?

Guest_spaceffm_*	Nov 14 2005, 10:22 PM Post #1
Guests	I thought about it a lot. Do U think it would be possible that Earths gravity catches someday an asteroid or something similar and would keep it as 2nd moon? What precondition would be absolutly necessary? WQould it be possible at all due to both gravitational fields of earth and moon? Wouldn't it be fantastic to have a 2nd small moon? Thx for sharing your thoughts in this matter...

Replies

Guest_BruceMoomaw_*	Nov 14 2005, 10:38 PM Post #2
Guests	Cruithne, however, isn't a "moon", but just an asteroid locked into a 1:1 orbital-period resonance with Earth ( http://burtleburtle.net/bob/physics/cruithne.html ). Also, it's Shoemaker-Levy 9 -- not "3" -- that hit Jupiter.

Bob Shaw View Member Profile	Nov 14 2005, 10:43 PM Post #3
Senior Member Group: Members Posts: 2488 Joined: 17-April 05 From: Glasgow, Scotland, UK Member No.: 239	A couple of years ago there was a brief flurry when a second 'moon' did turn up - it turned out, however, to be the S-IVB stage from the Apollo 12 Saturn V, which had entered Solar orbit and been recaptured within the Earth-Moon system (not on a permanent basis, however). In true scientific detective-novel fashion, it was discovered to be the spent spacecraft booster as a result of spectral analysis, which revealed a surface coating of, er, Titanium Oxide - as in white paint! Bob Shaw -------------------- Remember: Time Flies like the wind - but Fruit Flies like bananas!

ljk4-1 View Member Profile	Nov 15 2005, 05:57 PM Post #4
Senior Member Group: Members Posts: 2454 Joined: 8-July 05 From: NGC 5907 Member No.: 430	QUOTE (Bob Shaw @ Nov 14 2005, 05:43 PM) A couple of years ago there was a brief flurry when a second 'moon' did turn up - it turned out, however, to be the S-IVB stage from the Apollo 12 Saturn V, which had entered Solar orbit and been recaptured within the Earth-Moon system (not on a permanent basis, however). In true scientific detective-novel fashion, it was discovered to be the spent spacecraft booster as a result of spectral analysis, which revealed a surface coating of, er, Titanium Oxide - as in white paint! Bob Shaw Don't forget "Planetoid" 1991 VG: http://www.centauri-dreams.org/?p=80 -------------------- "After having some business dealings with men, I am occasionally chagrined, and feel as if I had done some wrong, and it is hard to forget the ugly circumstance. I see that such intercourse long continued would make one thoroughly prosaic, hard, and coarse. But the longest intercourse with Nature, though in her rudest moods, does not thus harden and make coarse. A hard, sensible man whom we liken to a rock is indeed much harder than a rock. From hard, coarse, insensible men with whom I have no sympathy, I go to commune with the rocks, whose hearts are comparatively soft." - Henry David Thoreau, November 15, 1853

Posts in this topic

spaceffm Earths 2nd Moon? Nov 14 2005, 10:22 PM

djellison We have one called Cruithne I believe - something ... Nov 14 2005, 10:35 PM

BruceMoomaw It would certainly be possible, thanks to three-bo... Nov 14 2005, 10:36 PM

BruceMoomaw Cruithne, however, isn't a "moon", b... Nov 14 2005, 10:38 PM

Bob Shaw A couple of years ago there was a brief flurry whe... Nov 14 2005, 10:43 PM

ljk4-1 QUOTE (Bob Shaw @ Nov 14 2005, 05:43 PM)A cou... Nov 15 2005, 05:57 PM

blobrana QUOTE (ljk4-1 @ Nov 15 2005, 10:27 PM)Do... Dec 6 2005, 08:17 PM

silylene Two other asteroids, 1998 UP1 and 2000 PH5 are als... Nov 15 2005, 03:28 AM

tasp Toro! Funny little asteroid that was in reson... Nov 15 2005, 03:09 AM

mike Some might say that Earth is Cruithne's moon. Nov 15 2005, 05:29 PM

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