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                                                  Circular No. 5866
Central Bureau for Astronomical Telegrams
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Telephone 617-495-7244/7440/7444 (for emergency use only)
TWX 710-320-6842 ASTROGRAM CAM     EASYLINK 62794505

     Because of sharply increased dissemination costs, it will become
necessary, starting Oct. 1, to increase the subscription rates to
the printed edition of these Circulars.  The new monthly rates
will be $12.50 at the regular (invoiced) rate and $7.50 at the special
(non-invoiced) rate.  At the same time, however, we are prepared to
drop the requirement that subscribers to the electronic version must
also subscribe to the printed edition.  If subscribers notify us that
they no longer require the Circulars in printed form, they can therefore
utilize the Computer Service and/or receive these Circulars by e-mail
for a monthly charge of only $12.50 (regular rate) or $7.50 (special rate).
Furthermore, the Minor Planet Center is about to initiate a series of
Minor Planet Electronic Circulars (MPECs), containing urgent information
about unusual minor planets.  These will also be available in the
Computer Service and sent, at least initially, to all e-mail subscribers
at no extra charge.  They will contain (and much more extensively)
most of the information about near-earth objects that has in the past
been contained in the IAU Circulars (as well as some less urgent
information about comets).  The MPECs will not be issued in printed
form, although all the relevant material in them will also be published
in the monthly Minor Planet Circulars.  All subscribers should be aware
that this arrangement will be economically viable only if there is a
significant increase in the number of subscribers to the Computer
Service/e-mail delivery.  If you are reading a pirated version of this
Circular, you are therefore urged to open your own subscription by
contacting the postal or e-mail addresses above.

     On Aug. 2 R. H. McNaught, Anglo-Australian Observatory, informed
us that he had been able to find another image of the 1978 May 1 comet
he reported on IAUC 5471.  This was on a U.K. Schmidt exposure on 1978
Apr. 12 by K. P. Tritton and H. T. MacGillivray.  The undersigned then
suggested identity with the other comet mentioned on IAUC 5471, i.e.,
the one discovered by S. B. Tritton on a 1979 Mar. 5 plate (taken by
W. J. Zealey) and the measurements of which were published with an
erroneous date on IAUC 3662.  A parabolic orbit solution (T = 1978
Aug. 25, q =  6.28 AU, i = 153 deg) then allowed S. B. Tritton to find
a faint image of the comet on a plate taken by J. A. Dawe on 1980 Jan.
23.  The 1978 May 1 image was also independently noticed by D. F. Malin.

1993 September 18              (5866)              Brian G. Marsden

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