A low-dispersion spectral video camera for observing lunar impact flashes

Earth, Planets and Space

Table 4 Summary of some parameters derived for the flashes

Flash	Blackbody temperature/K	V-magnitude	R-magnitude	Mass^a/g	Effective diameter of radiating source ^b/m	Crater diameter/m
161107 ^c,d	3300	9.0	7.8	330	1.5	3.7
170201 ^e	4200 3100 3000	8.6 8.3 9.7	7.7 7.2 8.8	1300	0.72 2.3 1.4	5.5
170204a	7000	10.0	9.4	110	0.11	2.7
170204b	2800	9.6	8.1	270	2.1	3.5
170204c	6800	8.8	8.3	310	0.19	3.7
170204d ^e	2500 3000	11.0 10.3	9.7 9.1	180	1.7 1.0	3.1
170501	3400	9.2	8.2	240	1.0	3.4
170502a	3200	9.6	8.6	190	1.1	3.2
170502b^d	13000	9.1	8.8	160	0.060	3.0

^aAssuming meteoroids’ impacts on the lunar surface at 20 km s⁻¹
^bThe diameter of a disk with the same area as the cross-section of a radiating source
^cThe 1st-frame might be missed due to the frame drops. See text
^dThe exposure time and frame interval are 16.7 ms for 161107, 12.5 ms for 170502b, and 20.0 ms for the others
^eResults for multiple successive frames are shown from top to bottom