[neo_followup] 2020 CY1 : Arecibo target, astrometry needed

[Bill Gray]

Hello all,

    It looks as if the Arecibo folks may be able to get some
radar observations of this object about ten hours from "right
now" (i.e.,  it'll be well-placed for them between about 01:40
and 03:40 UTC on 10 Feb).  It's a nice,  big target that passes
right through their field of view.  Arecibo can't be steered,
so you really need your target to pass within about 18.5
degrees of the zenith.  Since they're at latitude 18.3 N,  that
means the declination should be about zero to +37 degrees.
This object will be near dec +21 at the center of the observation
window,  passing almost overhead.

    However,  the last observations were from (K87) Dettelbach
in Germany about a day and a half ago.  The ephemeris
uncertainties are not huge (they'll be about 15" one-sigma
during the Arecibo observing window),  but they're large enough
that a few more observations would _really_ help.  The object
is around mag 16.5,  so just about anybody can play here,
even with a full moon will be only about 30 degrees away.

    The object is currently moving along at about 2"/second and
picking up speed (it'll be nearly twice that by the time Arecibo
looks at it).  So good timing is of the essence here.  In theory,
one set of observations ought to do the trick,  but I'm sort of
hoping for more,  just to rule out timing problems.

-- Bill