Re: Messier Marathon Object Ordering (?)

Greg Crinklaw wrote:

I planned a marathon like this for the 26th and the rough ones are M74,
which will be very low on the western horizon during evening twilight,
and M30, which has a similar problem during morning twilight. If you
can get those two you should be ok. But all this is very subject to
latitude!

Yes, those are the two notoriously difficult ones. M77 is at nearly as
unfavorable of an altitude as M74, but is much easier to see thanks to
its bright Seyfert core.

Even though it's up quite a bit higher, M33 can pose a challenge in
murky or light-polluted sites thanks to its low surface brightness.
The same can be said for M110 (he said, refusing to participate in an
argument over whether there are 109 or 110 objects).

Greg's location is probably in the 99th percentile of s.a.a. for *not*
being murky or light polluted, by the way.

Tom

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