Making Wikipedia list of objects at Sun-Earth L-points

[silsor]

I've been working on a list (http://en.wikipedia.org/wiki/List_of_objects_at_the_Sun-Earth_Lagrangian_points) of objects at the Sun-Earth Lagrangian points and I think I've gone as far as I can with casual web searching. So far I can only find information on one observatory at L1 (SOHO-3) and one observatory at L2 (the WMAP), along with a few dust clouds and planned launches (not very interesting). If anyone knows of more that I missed I would really appreciate it if you could help me out.

[ToSeek]

ACE, WIND, and ISEE-3 (http://sohowww.nascom.nasa.gov/explore/faq/spacecraft.html#ORBIT_STABILITY) at L1 once upon a time, though ISEE-3 went on to intercept a comet, and WIND is now doing some really freaky stuff (http://pwg.gsfc.nasa.gov/halo17d_xy2-bowshock.gif).

WMAP is the only one I know of at L2, though the James Webb Space Telescope is supposed to get there eventually.

[silsor]

Thanks, I added information on the ACE. The WIND home page (http://www-istp.gsfc.nasa.gov/istp/wind/) says that WIND was launched in 1994 and was supposed to settle into a halo orbit at L1 after 2 years, but I'm not sure that is correct given that diagram of its trip (which made me chuckle BTW).

[ngc3314]

ACE, WIND, and ISEE-3 (http://sohowww.nascom.nasa.gov/explore/faq/spacecraft.html#ORBIT_STABILITY) at L1 once upon a time, though ISEE-3 went on to intercept a comet, and WIND is now doing some really freaky stuff (http://pwg.gsfc.nasa.gov/halo17d_xy2-bowshock.gif).

WMAP is the only one I know of at L2, though the James Webb Space Telescope is supposed to get there eventually.

ESA intends Herschel and Planck for the L2 region as well. They will be launched fastened together back-to-back, so it's just as well they're going to about the same destination.

[silsor]

ACE, WIND, and ISEE-3 (http://sohowww.nascom.nasa.gov/explore/faq/spacecraft.html#ORBIT_STABILITY) at L1 once upon a time, though ISEE-3 went on to intercept a comet, and WIND is now doing some really freaky stuff (http://pwg.gsfc.nasa.gov/halo17d_xy2-bowshock.gif).

WMAP is the only one I know of at L2, though the James Webb Space Telescope is supposed to get there eventually.

ESA intends Herschel and Planck for the L2 region as well. They will be launched fastened together back-to-back, so it's just as well they're going to about the same destination.
According to what I've been digging up, ESA intends to send GAIA (http://en.wikipedia.org/wiki/Gaia_probe) to L2 in about 2011, and either NASA's TPF (http://en.wikipedia.org/wiki/Terrestrial_Planet_Finder) or ESA's Darwin (http://en.wikipedia.org/wiki/Darwin_%28ESA%29) will go as well, or maybe a joint project instead.

[ToSeek]

Thanks, I added information on the ACE. The WIND home page (http://www-istp.gsfc.nasa.gov/istp/wind/) says that WIND was launched in 1994 and was supposed to settle into a halo orbit at L1 after 2 years, but I'm not sure that is correct given that diagram of its trip (which made me chuckle BTW).

It did L1 for a while, but then went on to do other things. (http://pwg.gsfc.nasa.gov/istp/news/9804/) (I worked on WIND for a little while, by the way, though nothing to do with the flight dynamics.)

[silsor]

Thanks, I added that too. If anyone wants to edit the article themselves, just click "edit this page" at the top of it.

[Manchurian Taikonaut]

http://www.badastronomy.com/phpBB/viewtopic.php?t=14845

Gaia, TPF and XEUS

[publiusr]

ACE, WIND, and ISEE-3 (http://sohowww.nascom.nasa.gov/explore/faq/spacecraft.html#ORBIT_STABILITY) at L1 once upon a time, though ISEE-3 went on to intercept a comet, and WIND is now doing some really freaky stuff (http://pwg.gsfc.nasa.gov/halo17d_xy2-bowshock.gif).

No, that was when my mother in law--the alien--got lost and wouldn't ask for directions. Just like Dad.

[silsor]

The list is now collecting objects at all Lagrangian points everywhere, and as far as I know is fairly complete. The new title is:

http://en.wikipedia.org/wiki/List_of_objects_at_Lagrangian_points

[publiusr]

That is a good list. I didn't see an HLLV listing though, except for shuttle derived.

[Hynee]

I added the Tethys and Dione Lagrangian moons too.

[mantiss]

lagrangian trojan asteroids of Neptune (http://en.wikipedia.org/wiki/Neptune_%28planet%29)

And come to think of it, perhaps 3753 Cruithne should be included in there, it hovers within L2/L3/L4 but is clearly an oddball =)

I have failed to find and potential trojan info for Uranus and Pluto.

Mars: 5261 Eureka and 1998 VF31 and 2001 DH47 (At L5)

[iron4]

lagrangian trojan asteroids of Neptune (http://en.wikipedia.org/wiki/Neptune_%28planet%29)

And come to think of it, perhaps 3753 Cruithne should be included in there, it hovers within L2/L3/L4 but is clearly an oddball =)

I have failed to find and potential trojan info for Uranus and Pluto.

Mars: 5261 Eureka and 1998 VF31 and 2001 DH47 (At L5)

But according to this page, Mars has 6 Trojan asteroids


http://home.cwru.edu/~sjr16/advanced/asteroid.html

[mantiss]

But according to this page, Mars has 6 Trojan asteroids


http://home.cwru.edu/~sjr16/advanced/asteroid.html (http://home.cwru.edu/%7Esjr16/advanced/asteroid.html)

But they limit the number of Trojan Asteroids for Neptune to 1. I guess we all have to deal with the fact that no definite number is achievable since discoveries are still being made =)

[Kullat Nunu]

But according to this page, Mars has 6 Trojan asteroids


http://home.cwru.edu/~sjr16/advanced/asteroid.html

Mars has at least one Trojan asteroid, (5261) Eureka. Others are not so certain. Minor Planet Center had a list of Martian Trojans, but it has been replaced with this comment (http://cfa-www.harvard.edu/iau/lists/MarsTrojans.html).


But they limit the number of Trojan Asteroids for Neptune to 1. I guess we all have to deal with the fact that no definite number is achievable since discoveries are still being made =)

There are now two known Neptune Trojans, both at least as large (?) as Jupiter's largest Trojans. It is possible that Neptune has far more Trojan asteroids than Jupiter.

[iron4]

Just for the record, 2002 VE68
http://www.blackwell-synergy.com/doi/abs/10.1111/j.1365-2966.2004.07994.x?cookieSet=1

is a quasi-satellite of Venus, and the only asteroid co-orbital with Venus known, but is NOT a Trojan asteroid. Venus has no known Trojan asteroids, and I suspect that Mercury doesn't have one either

[mantiss]

Just for the record, 2002 VE68
http://www.blackwell-synergy.com/doi/abs/10.1111/j.1365-2966.2004.07994.x?cookieSet=1

is a quasi-satellite of Venus

A link that works best: http://www.blackwell-synergy.com/doi/abs/10.1111/j.1365-2966.2004.07994.x

:whistle:

Earth also has 2 co-orbitals but I don't think they are related to the L points, however don't quote me on that I can't google it to check ;)