# Going to Eros; what to consider choosing between ion and chemical propulsion?

When planning a mission to a close approach to the asteroid Eros and to remain nearby, what are the factors that one would need to consider when choosing between ion propulsion and chemical propulsion?

• One question per post please. – Organic Marble Mar 19 '20 at 23:39
• -1 for 1) a jumble of several questions, 2) no sign of any prior research (i.e. "please look this up for me") 3) no sign of learning from previous comments on and edits to your questions. Vote to close for "needs more focus". – uhoh Mar 20 '20 at 1:14
• I've edited the question to narrow the scope. Hopefully that may stop the votes to close. There were two questions about the asteroid's layers and elements; the Astronomy site might be a better place to ask those. I didn't understand your original last sentence; you could try asking it in a different post, if you can explain it more clearly. – DrSheldon Mar 20 '20 at 2:06
• @uhoh: I admit that the edit might not be perfect. I was in a hurry to help the question, before it would be closed. You are much better than I am at editing other people's questions. – DrSheldon Mar 20 '20 at 13:24
• @uhoh: Great! Also works with the existing answer. – DrSheldon Mar 20 '20 at 13:32