Satellite's lowest orbit — one's immersed in chlorite mixture (5,5)
I believe the answer is:
roche limit
'satellite's lowest orbit' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.
'one's immersed in chlorite mixture' is the wordplay.
'one's' becomes 'im' ('one is' is a formal way of saying 'I am').
'immersed in' means one lot of letters goes inside another.
'mixture' indicates anagramming the letters.
'chlorite' is an anagram of 'rochelit'.
'im' placed within 'rochelit' is 'ROCHE LIMIT'.
Can you help me to learn more?
(Another definition for roche limit that I've seen is " moon's closest orbit".)