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A199715 A puzzle - explanation is not known. 1


%S 2,8,2,3,4,9,4,5,9,8

%N A puzzle - explanation is not known.

%C In November 1987, an editor at the Astrophysical Journal wrote to _N. J. A. Sloane_ with three sequences whose explanation was not known to her. She said: "As to the pedigree of these sequences, not much is known. But they are US in origin, and /not/ Hungarian". One of the three was the number-theoretical sequence A007468. The other two are now A199714 and this sequence.

%C The synodic rotation period of the main-belt asteroid (6572) Carson, discovered 1938, is approximately 2.8235 hours. [Galad & Kornos] - _Arkadiusz Wesolowski_ and _Robert Israel_, May 11 2018

%H A. Galad, L. Kornos, <a href="http://adsabs.harvard.edu/abs/2008MPBu...35...78G">A sample of lightcurves from Modra</a>, Minor Planet Bull. 35 (2) (2008) 78-81

%Y Cf. A007468, A199714.

%K nonn,unkn

%O 1,1

%A _N. J. A. Sloane_, Nov 09 2011

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Last modified July 23 17:41 EDT 2021. Contains 346259 sequences. (Running on oeis4.)