Rịba ama amaokwu a dị n'okpuru ma zaa ajụjụ ahụ mgbe e mesịrị n'otu asụsụ ahụ dị ka amaokwu ahụ:  Passage: 720 Bohlinia bụ obere mbara ala na-agba anyanwụ gburugburu nke Franz Kaiser, onye German na-enyocha mbara igwe chọpụtara na 1911. A na-akpọ ya maka onye Sweden na-enyocha mbara igwe Karl Petrus Theodor Bohlin, iji mee ememe ncheta ọmụmụ 65 ya. Ọ rụrụ ọrụ na orbit nke asteroids. Ọ bụ otu n'ime ezinụlọ Koronis nke asteroids. Otu ìgwè ndị na-enyocha mbara igwe, gụnyere Lucy d<unk>Escoffier Crespo da Silva na Richard P. Binzel, jiri nyocha ndị e mere n'etiti 1998 ruo 2000 iji chọpụta nhazi ntụgharị-vector nke asteroids ndị a. Ọrụ mmekorita ahụ rụpụtara na okike nke 61 ọhụụ ọhụụ ọhụụ ọhụụ iji gbakwunye ihe ndị e bipụtara na mbụ.Binzel na Schelte Bus gbakwunyere ihe ọmụma banyere asteroid a na nyocha ọkụ ọkụ nke e bipụtara na 2003. A maara oru ngo a dị ka Small Main-belt Asteroid Spectroscopic Survey, Phase II ma ọ bụ SMASSII, nke wuru na nyocha nke mbụ nke isi asteroids. A chịkọtara data spectra nke ogologo ebili mmiri a na-ahụ anya (0.435-0.925 micrometre) n'etiti August 1993 na March 1999.  Ajụjụ: Olee ihe dị na mbara igwe nke a na-achọ ime nnyocha na ya?
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