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Just reverted "ISEE-U" to ISEE-3. The former was red-linked. I think it must have been the pre-launch designation, as NASA used to denote un-launched satellites with a letter (eg, OSO-H) and then change that to a numeral (eg, OSO 7) once they were up and successfully operating. Anyhow, it was widely known as ISEE-3 from after launch in 1978 until it was re-named "ICE" for "International Cometary Explorer" and sent off to look at a comet. (A redirect from ISEE-U to ISEE-3 would be fine with me.) Wwheaton ( talk) 04:52, 15 January 2009 (UTC)
I might be wrong but it seems to me that the satellite on this animation is orbiting around nothing, just between the Moon and L2. Shoudn't it orbit (on the same banana-shaped trajectory) around L2, a little more to the right of this picture? 81.53.143.67 ( talk) 21:09, 9 February 2009 (UTC)
I wish that Halo orbits were defined here with slightly more content, at least descriptive, by someone who understands them. Are Halo orbits a special subset of a larger class of Lissajous orbits? It would help me to have some mention of the typical range of periods of Halo psuedo-orbits (compared to the period of the larger two bodies). jimswen ( talk) 22:09, 13 December 2014 (UTC)
Agreed, the article is too general. It just says that a halo orbit is a type of orbit (who'd have thought), without describing what orbit it actually is. The diagram doesn't help, and is somewhat misleading: it shows the Lagrange points but not the Halo orbits. 2602:306:CEAE:E60:1DD3:419B:DDDC:1669 ( talk) 06:36, 21 May 2018 (UTC)
The present Introduction includes "Halo orbits are the result of a complicated interaction between the gravitational pull of the two planetary bodies and the Coriolis and centrifugal accelerations on a spacecraft.".
Coriolis and centrifugal accelerations are essentially fictitious; all non-relativistic orbits are a direct result of combining the Newtonian gravitational fields (or other fields) and considering the consequences. Evidently Lagrange understood that.
94.30.84.71 ( talk) 14:32, 24 September 2017 (UTC)
The Lissajous orbit article lists SOHO as having used a Sun-Earth L1 Lissajous orbit. It's also listed here. Has its orbit type changed? 165.225.38.204 ( talk) 13:43, 27 October 2017 (UTC)
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A section for NRHOs may be of interest as NASA's LOP-G station is intended to be placed in one. Further information can be found here:
What's this about north and south families of orbit? Doesn't each orbit go north south east west? Jim.henderson ( talk) 01:09, 3 November 2018 (UTC)
Without relying on WP:original research it would improve the article if an assertion could be made that a halo orbit is at least partially outside the sphere of influence of the secondary body. Is there a source for that? ( sdsds - talk) 21:26, 8 February 2024 (UTC)