The asteroid sample will help scientists understand the origin of organics and water that may have seeded life on Earth 4.5 billion years ago.
The Philae lander on Wednesday separated from the Rosetta orbiter and became the first spacecraft to achieve a soft landing on a comet.
Tomy was battling for life on the dismasted sailboat Thoriya with a severe back injury, the officials said.
'When I crossed that point where I had the accident, I felt light and that was a very physical experience. I felt something leave me.' Shyam G Menon chronicles the voyages of that incredible Indian sailor, Abhilash Tomy.