[seqfan] Sequences cross-linking some astronomical catalogs

Felix Fröhlich felix.froe at gmail.com
Fri May 19 20:49:16 CEST 2017


Dear SeqFans,

I've been thinking about some astronomy related sequences, but wonder
whether they would be acceptable.

Those sequences link some catalogs of astronomical objects to each other.
An example is the following:

Numbers n such that the n-th astronomical object in the New General
Catalogue, NGC n, also has a Messier number.

The sequence starts 205, 221, 224, 581, 598, 628, 650, 651, 1039, 1068,
1904, 1912, 1952, 1960, 1976, 1982, 2068, 2099, 2168, 2287, 2323, 2422,
2437, 2447, 2548, 2632, 2682, 3031, 3034, 3351, 3368, 3379, 3556, 3587,
3623, 3627, 3992, 4192, 4254, 4258, 4303, 4321, 4374, 4382, 4406

It can be obtained from "List of Messier objects" in Wikipedia. Other
sequences relating other astronomical catalogs are possible.

I once submitted a similar sequence that was not a list. That sequence was
rejected. So I wonder whether this would be acceptable.

Best regards
Felix



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