The atmospheric influence, size and possible asteroidal nature of the July 2009 Jupiter impactor by Orton, G, Fletcher, L, Lisse, C, Chodas, P, Cheng, A, Yanamandra-Fisher, P, Baines, K, Fisher, B, Wesley, A, Perez-Hoyos, S, de Pater, I, Hammel, H, Edwards, M, Ingersoll, A, Mousis, O, Marchis, F, Golisch, W, Sanchez-Lavega, A, Simon-Miller, A, Hueso, R, Momary, T, Greene, Z, Reshetnikov, N, Otto, E, Villar, G