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IAUC 3705: 1982g; 1982a; CRAB PULSAR

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IAUC number 

                                                  Circular No. 3705
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
TWX 710-320-6842 ASTROGRAM CAM     Telephone 617-864-5758


COMET AUSTIN (1982g)
     P. M. Kilmartin, Mt. John University Observatory, telexes that
a comet has been discovered by Rodney R. D. Austin.  The following
observations are available:

     1982 UT             R. A. (1950) Decl.       m1     Observer
     June 18.667       4 04.5       -40 05        10     Austin
          19.625       4 06.0       -39 50        10       "
          19.73958     4 05 56.88   -39 52 20.1   10     Gilmore
          19.76539     4 05 59.16   -39 51 58.1            "

R. R. D. Austin (New Plymouth, New Zealand).  Object diffuse with
   condensation, nothing reported about a tall.
A. C. Gilmore (Mt. John Observatory).  Similar appearance.


PERIODIC COMET GRIGG-SKJELLERUP (1982a)
     Further total visual magnitude estimates by J. Bortle, Stormville,
NY (0.32-m reflector): June 10.10 UT, 10.4; 15.10, 10.4.
Ephemeris continuation (cf. IAUC 3698) from MPC 6215:

     1982 ET     R. A. (1950) Decl.     Delta     r      m2
     June 30    14 42.00    +36 14.2    0.445   1.175   16.4
     July  5    15 09.44    +34 16.6
          10    15 33.00    +32 05.7    0.519   1.250   17.0
          15    15 53.40    +29 48.1
          20    16 11.29    +27 28.4    0.605   1.331   17.6
          25    16 27.22    +25 09.4
          30    16 41.63    +22 53.4    0.702   1.416   18.2
     Aug.  4    16 54.85    +20 41.9
           9    17 07.14    +18 35.7    0.811   1.503   18.8


CRAB PULSAR
     F. G. Smith writes: "Nuffield Radio Astronomy Laboratories,
University of Manchester, have undertaken a long-term program
measuring arrival times of pulses from the Crab Pulsar, usually on
408 or 610 MHz, at least once per week, with an accuracy of ~ 5 us.
Arrival times and periods are available on request to me or to
A. G. Lyne at the address: Jodrell Bank, Macclesfield, Cheshire
SKll 9DL, England (telex U.K. 36149 JODREL G)."


1982 June 21                   (3705)              Brian G. Marsden

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