It is a Main-Belt Asteroid and as such is always outside the orbit of Mars.
The 342843 is a sequence number, in that it is the 342,843rd confirmed ‘Minor Planet’ to have been discovered, Ceres (now a Dwarf Planet) having the honor of being the 1st, i.e., 1 Ceres. Pluto now that it is a dwarf is numbered 134340.
The name is optional and is initially put forward by the discoverer of the asteroid.
As of today 701,660 ‘Minor Planets’ have been catalogued as having been discovered. 19,712 of them, just a mere 2%, are named. Here is the list. So to have an asteroid named after you is, of course, special, BUT not that exclusive.
The ‘Beatles’ collectively and individually have asteroids named after them, viz. 8749 Beatles, 4147 Lennon, 4148 McCartney, 4149 Harrison & 4150 Starr. Some of the others include Carlos Santana, Frank Zappa, Eric Clapton, Jerry Garcia, Jimi Hendrix, Led Zeppelin, Mike Oldfield, Miles Davis, Frank Sinatra, Bee Gees, Buddy Holly etc. etc. Here is a list.
So David, as is due, has been honored as a ‘spaceman’.
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