Perihelion, perigee, peri-?

[Blue Skies]

For a long time I've wanted to put together a list of all the peri- terms for the solar system i.e. the term for the point of closest approach to an object in an orbit. I've only got a few so far:

Sun - perihelion
Earth - perigee
Moon - pericynthion
Jupiter - perijove

Anyone else know of any others?
I have an idea that the term for Venus is something like pericytherion but I haven't confirmed it. I've alos been on the look out for the term for Saturn with the Cassini spaceprobe but it hasn't surfaced yet either.

[stephenmcnelley]

uhmm, periscope, they go up and down sometimes...:astron: , hic!! :drink: :innocent:

[mojo]

periastron - binary star

perigalacticon...
http://www.daviddarling.info/encyclopedia/P/perigalacticon.html

[Blue Skies]

Yes, I have heard of periastron before, but I'm more keen to get the terms for solar system objects, if there are any.

[mojo]

Perikrone - Saturn

Terminology heading...
http://en.wikipedia.org/wiki/Perihelion

[sheeny]

Is that closest approach to the scope of the planet or the observer???:P

Al.

[[1ponders]]

periapsis - point in an orbit when two objects are closest together
peridotite - asteroid/meteorite formed of olivene and pyroxene
periodic - as in comet

[AGarvin]

In Apollo 13, they refer to "PC +2 burn data" ...... Engine burn at pericynthion +2 hours. Just a bit of useless but kinda related trivia :P .

[Blue Skies]

Ah, Wikipedia! I must remember to start using it more. Thanks for the link.:thumbsup: