Lat: 38.4°S, Long: 113.0°E, Diam: 48 km, Depth: km, Rükl: (farside), Upper Imbrian
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Bjerknes was captured near the upper right corner of Apollo 17's Fairchild-camera photograph AS17-M-3183, which was made during Trans Earth Coast (TEC).
Research: Danny Caes
Aged as Late Imbrium (~ 3.85 to 3.8 bn years), Bjerknes more than likely formed on ejecta deposits from the Australe Basin - a 880 kilometre-wide basin of the pre-Nectarian period (~ 4.6 to 3.92 bn years) whose outer rim lies just ~ 150 kilimetres away to its south-west. The crater has a somewhat sharp-ish rim for its age, but on closer examination signatures of inner wall-collapse, terracing and an infilled centre suggest Bjerknes has been through the time-mill. Only one or two small craters dot its centre and south-western rim. - JohnMoore2
- TSI = 25, CPI = 15, FI = 10; MI =50 Smith and Hartnell, 1973
Vilhelm Friman Koren; Norwegian physicist (1862-1951).