(meteorobs) P289 Blanpain and meteors in the body of Cetus around mid November

[tpub at Safe-mail.net]

I tried to get this into meteorobs the other day, but probably got moderated out or something, not being strictly observational.

A couple of months ago whilst doing a check of newer comet orbits against two station meteor orbits a bunch of matchs cropped up for this comet.

But they weren't Phoenicids!  In fact they don't quite match any of the traditional orbit tweaking / evolution models.  Against SonotaCo, Croatian Meteor Network, EDMOND and more recently CAMS orbits they mostly occur in the "body of the whale", that is in the main bulk of Cetus often biased towards the north of that part of the constellation.  And they're around a month early, being fairly mid Novemeber, although they will spread from latest October to early December.

The more recent CAMS analysis showed a few candidates in Sculptor and Aquarius, however.

I'll attach the list as a comma delimited file, headings should be self evident (key is just a running number in a database).

Using the software METREC on P289 Blanpain's orbit doesn't predict any sort of radiant nor time period as these show.  Yet using orbital similarity testing with D criteria lots of these none Phoenicid objects get linked.  Using values for D < 0.1 it's over 50 meteor orbits!

They're not linking to other comets.  And the databases carrying them have logged them as sporadics.

Probably quite a few of them on surveys, especially around Taurid campaigns, and to a lesser extent maybe some images taken on Leonid campaigns too.

Tried to link them back to reversely numerical integrated orbits for the comet, nothing matched.  One for those that truly understand orbital dynamics stuff.

Wouldn't give it more than passing interest if it wasn't for the large number of candidates matching over a relatively short few years.  CAMS appears to have picked up a good half dozen or so in 2011 alone, for instance.

John G.
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