Re: Mark IV data off by one day

["Gary W. Billings" <obs681@telusplanet.net>]

It looks like you are on GSC 1480 0046  V=12.0, B-V = 0.6

Re colour, asteroids are mostly slightly reddish...  so the colour you
report might be fine.  I'd have to do more research...

g.


----- Original Message -----
From: "Thomas Droege" <tdroege2@earthlink.net>
To: "Billings, Gary W." <obs681@telusplanet.net>; <tass@listserv.wwa.com>
Sent: Saturday, June 12, 2004 9:14 AM
Subject: Re: Mark IV data off by one day


> OK, for my "2453109" day I have:
>
> 220.54282 18.95576 2453109.76631 V 11.97 I 11.29
>
> The only other objects close to this position had big V/I differences and
> were at least a mag off.  I notice little difference between V and I.  Is
> this a clue that it might be an asteroid?  I assume we have some color
> information for Manderville as a check?
>
> Tom Droege
>
>
> > [Original Message]
> > From: Gary W. Billings <obs681@telusplanet.net>
> > To: <tass@listserv.wwa.com>
> > Date: 6/12/2004 9:48:31 AM
> > Subject: Re: Mark IV data off by one day
> >
> > Nope, that looks like GSC 1480 0085
> >
> > According to Guide the coords you want are 220.46520, 19.08608 (for the
> > 2453110.76631 date)
> > and
> > According to Guide the coords you want are 220.57550, 18.97102 (for the
> > 2453109.76631 date)
> >
> > g.
> >
> >
> >
> > ----- Original Message -----
> > From: "Thomas Droege" <tdroege2@earthlink.net>
> > To: "Richard Miles" <rmiles.btee@btinternet.com>; "Billings, Gary W."
> > <obs681@telusplanet.net>; "tass" <tass@listserv.wwa.com>
> > Sent: Saturday, June 12, 2004 8:29 AM
> > Subject: Re: Mark IV data off by one day
> >
> >
> > > OK, a quick look at 2453109 gave an object at:
> > >
> > > 220.70681 18.85319 2453109.76631 V 12.18
> > >
> > > If this matches up with the asteroid position on 2453110.76631 then we
> > > probably have it.  I will look now at 108.  It is a race between Tom
> > > gawking the list and Mike extracting stuff from his data base.
> > >
> > > Tom Droege
> > >
> > >
> > > > [Original Message]
> > > > From: Richard Miles <rmiles.btee@btinternet.com>
> > > > To: <tdroege2@earthlink.net>; Billings, Gary W.
> <obs681@telusplanet.net>
> > > > Date: 6/12/2004 2:53:08 AM
> > > > Subject: Re: Mark IV data off by one day
> > > >
> > > > Gary / Tom,
> > > >
> > > > Don't rule this idea out just yet.
> > > >
> > > > The best of the candidate asteroids looks to be 739 Mandeville,
which
> > was
> > > > near 220.7 deg RA and +18.9 deg Dec on the date in question.  This
> > object
> > > > was nominally at V=12.0 and moving at 13 arcmin/day.  Therefore it
> > should
> > > be
> > > > possible to discriminate the actual day from images taken.
> > > >
> > > > Cheers,
> > > > Richard Miles
> > > >
> > > > P.S. tried sending to TASS list earlier but my new address was not
> > > > recognised and so it was thrown out.
> > > >
> > > > ----- Original Message -----
> > > > From: "Thomas Droege" <tdroege2@earthlink.net>
> > > > To: "Billings, Gary W." <obs681@telusplanet.net>;
> > <tass@listserv.wwa.com>
> > > > Sent: Friday, June 11, 2004 2:54 AM
> > > > Subject: Re: Mark IV data off by one day
> > > >
> > > >
> > > > > Gary,
> > > > >
> > > > > A good idea.  It does not have to move much.  So a search for an
> > > asteroid
> > > > > in the data would tell since our astrometry is usually good to 1
arc
> > > > > second.  An astroid that moved a few arc seconds a day would tell
> the
> > > > tale.
> > > > >
> > > > > Anyone want to take this on?  What we need are mag 9-11 asteroida
> that
> > > > move
> > > > > say 10 or more arc seconds a day somewhere between 160 and 270
> degrees
> > > in
> > > > > RA and 18 to 50 degrees in Dec.  The day is 2453109 If you get the
> > > > position
> > > > > of asteroids at the time that they cross the zenith they will be
> > pretty
> > > > > close in time to when I measure them.  I will need a few, because
> the
> > > way
> > > > I
> > > > > was taking data in April only covered about half the sky.
> > > > >
> > > > > Tom Droege
> > > > >
> > > > >
> > > > > > [Original Message]
> > > > > > From: Gary W. Billings <obs681@telusplanet.net>
> > > > > > To: <tass@listserv.wwa.com>
> > > > > > Date: 6/10/2004 9:03:42 PM
> > > > > > Subject: Re: Mark IV data off by one day
> > > > > >
> > > > > > If there are any frames from the day in question that captured a
> > > > > > sufficiently bright moving asteroid...  that could move from
> > "absence
> > > of
> > > > > > evidence" to "evidence of absence" of a day error...
> > > > > >
> > > > > > g.
> > > > > >
> > > > > > ----- Original Message -----
> > > > > > From: "Thomas Droege" <tdroege2@earthlink.net>
> > > > > > To: "Man, Stupendous" <richmond@stupendous.cis.rit.edu>;
> > > > > > <tass@listserv.wwa.com>
> > > > > > Cc: <mwrsps@rit.edu>
> > > > > > Sent: Thursday, June 10, 2004 5:24 PM
> > > > > > Subject: RE: Mark IV data off by one day
> > > > > >
> > > > > >
> > > > > > > Here is an attempt to look another way at the possibility that
> the
> > > > Mark
> > > > > IV
> > > > > > > data was off one day on 2543109.
> > > > > >
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