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Re: Placing a satellite in the center of the Halo
Posted By: Butcher <cbutcher@atlas.otago.ac.nz>	Date: 12/21/99 2:33 p.m.
In Response To: Placing a satellite in the center of the Halo (Noctavis =PN=) > Yes, yes... Were the Halo to exist on its own, there would be an > area - almost like a cylinder (more like the hole in a donut) > where gravity would be weaker and items would be able to shift > upwards or downwards along the axis. Perhaps you miss my point... yes, there is an axis where there is zero net gravity from the Halo. However it is dynamically unstable; any small deviation from the axis will cause an increasing acceleration further out, until the object smashes into the surface of the Halo. This will be exacerbated by local density variations on the Halo (e.g. between mountains and seas). > HOWEVER... The Halo is right in the middle of a Lagrange point. > It is existing in an area of balance between Jonesworld > (Threshold) and Zartmoon, and its "center of gravity" > is hollow! Put something there, and the same forces should act > upon it in the same manner. Hence, greater stability for this > central area than if you were relying upon only the weaker > gravity of the Halo itself. Couple of problems with this. The Halo isn't actually sitting centered on the Lagrangian point. It is orbiting this theoretical point at an unknown distance, in a slow orbit known as a 'halo orbit'. Perhaps more importantly, any forces that are present due to Threshold and Seropia will be applied equally to the Halo and the satellite. So it makes no sense to talk about the position of the satellite with respect to Threshold and Seropia (which determine the location of the Lagrangian points) determining the stability of the satellite with respect to the Halo. The only exceptions to this are tidal forces, which are small in magnitude and would probably only be noticeable if the satellite - Halo forces were zero. - Butcher

Message Index

Human Space Capability	Napalm Loon	12/17/99 7:33 a.m.
...But where would they orbit?	septimus	12/17/99 11:39 a.m.
Re: ...But where would they orbit?	Grey	12/17/99 12:40 p.m.
I'm dissapointed in you guys...	Maxaminus	12/17/99 2:05 p.m.
Two possible definitions.	Dispatcher	12/17/99 9:33 p.m.
Re: I'm dissapointed in you guys...	SiliconDream =PN=	12/17/99 9:43 p.m.
Re: ...But where would they orbit?	Jägermeister	12/17/99 1:22 p.m.
Re: Internal orbits	Mark Levin	12/17/99 2:15 p.m.
Re: Internal orbits	Mage	12/17/99 2:32 p.m.
Re: Internal orbits	Mark Levin	12/17/99 2:38 p.m.
Re: Internal orbits	Mage	12/17/99 4:13 p.m.
Re: Internal orbits	Maxaminus	12/17/99 4:45 p.m.
Re: Internal orbits	Mage	12/17/99 11:06 p.m.
Re: Internal orbits	Mark Levin	12/18/99 12:42 a.m.
Re: Internal orbits	Mage	12/18/99 11:31 a.m.
Re: Internal orbits	Mr. Eez	12/17/99 4:27 p.m.
Re: Internal orbits	MacGuyver	12/17/99 4:49 p.m.
Re: Internal orbits	Mark Levin	12/17/99 5:02 p.m.
Re: Internal orbits	SiliconDream =PN=	12/17/99 9:42 p.m.
Uses for the Halo's axis...	Noctavis =PN=	12/20/99 3:31 p.m.
Stable Orbits (again)	Butcher	12/21/99 1:36 a.m.
Placing a satellite in the center of the Halo	Noctavis =PN=	12/21/99 10:35 a.m.
Re: Placing a satellite in the center of the Halo	Butcher	12/21/99 2:33 p.m.
Unstable orbits... Why use a halo orbit?	Noctavis =PN=	12/21/99 6:31 p.m.
Tides on the Halo	Butcher	12/21/99 7:03 p.m.
Re: Tides on the Halo	Someguy	12/21/99 8:00 p.m.
Re: Tides on the Halo	Butcher	12/21/99 9:35 p.m.
Re: soell	•Mimer	12/25/99 3:55 p.m.
Re: soell	Matt	12/27/99 11:53 a.m.
Re: soell	Daft Shadow =PN=	12/27/99 4:11 p.m.
Re: soell	Bachus	12/27/99 6:50 p.m.
Re: Unstable orbits... Why use a halo orbit?	SiliconDream =PN=	12/21/99 11:40 p.m.
Re: Internal orbits	Nathan	12/20/99 4:37 a.m.
Re: Rotations	Forensic	12/20/99 11:58 a.m.
Re: Rotations	SiliconDream =PN=	12/20/99 2:21 p.m.
Re: Rotations	btrinen	12/20/99 2:53 p.m.
Gravity	SyberSmoke	12/20/99 3:09 p.m.
Re: Gravity	SiliconDream =PN=	12/21/99 11:00 p.m.
Re: Rotations	Noctavis =PN=	12/20/99 3:11 p.m.
Re: Rotations	Aiden	12/20/99 8:08 p.m.
Spin that ring	L. Tankersley ("Cap'n Carnage")	12/20/99 5:12 p.m.
Re: Spin that ring	Dispatcher	12/20/99 9:43 p.m.
Re: Spin that ring	L. Tankersley ("Cap'n Carnage")	12/21/99 10:25 a.m.
Re: Spin that ring	Dispatcher	12/21/99 11:10 p.m.
L1? or L4-5?	Oddot	12/22/99 10:24 a.m.
Re: L1? or L4-5?	L. Tankersley ("Cap'n Carnage")	12/22/99 2:54 p.m.
Q: How do you spin the Halo?	Ironfist [CMG]	12/20/99 5:41 p.m.
Re: Internal orbits	Chris Huff	12/20/99 6:59 p.m.
Re: Internal orbits	Ringdude	12/20/99 7:18 p.m.
Re: Internal orbits	SiliconDream =PN=	12/21/99 11:06 p.m.
Re: Internal orbits	Someguy	12/21/99 11:11 p.m.
Re: Internal orbits	SiliconDream =PN=	12/22/99 4:06 a.m.
Re: Internal orbits	Thomas Magle Brodersen	12/21/99 3:06 a.m.