Kesen
Seen to fall in 1850 in Japan · 135 kg recovered · H4
Kesen is the heaviest of the 42 falls recorded in Japan. It carries about 26 times the median recovered mass of H4 falls.
- Group
- H chondrites
- Recorded position
- 38.983° N, 141.617° E
The map is centred on Kesen. Rings every 100 km; numbers match the table below.
Nearest recorded falls
The closest recorded fall to Kesen is Tomiya, 95 km to the south-west. Within 250 km lie five other recorded falls.
| # | Fall | Year | Class | Recovered | Distance |
|---|---|---|---|---|---|
| 1 | Tomiya | 1984 | H4/5 | 28 g | 95 km south-west |
| 2 | Senboku | 1993 | H6 | 866 g | 108 km north-west |
| 3 | Otomi | 1867 | H | 6.5 kg | 128 km south-west |
| 4 | Nagai | 1922 | L6 | 1.8 kg | 166 km south-west |
| 5 | Aomori | 1984 | L6 | 320 g | 215 km north |
| 6 | Yonozu | 1837 | H4/5 | 32 kg | 266 km south-west |
What H4 means
H4 is the label for an ordinary chondrite with high total iron, petrologic type 4, mildly heated on its parent body. By recovered mass Kesen ranks fourth of the 50 H4 falls. The nearest other H4 fall is Numakai in Japan, 484 km away. In date order among H4 falls, the one before Kesen is Monroe (1849, the United States) and the one after is Quenggouk (1857, Myanmar).
Kesen in Japan’s record
In date order Kesen is number 7 of the 42 falls recorded in Japan, which run from 860 to 2003. The fall recorded before Kesen in Japan is Yonozu (1837); the next is Sone (1866).
The 1850s
Kesen is one of 36 falls dated to the 1850s. Elsewhere, the record lists one other fall in 1850: Shalka in India.