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IAUC 289: PLANET PLUTO; 1930c

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IAUC number 

                                                 Circulaire No. 289
BUREAU CENTRAL ASTRONOMIQUE
DE L'UNION ASTRONOMIQUE INTERNATIONALE
OBSERVATOIRE DE COPENHAGUE


PLANET PLUTO
     Prof. Shapley telegraphs the following orbit by Nicholson
and Mayall based on observations 1919 and 1930:

          T = 1988 June 5.5 U.T.
      Peri. = 111 46
      Node  = 109 22      1930.0
      Incl. =  17  9
      log q = 1.471
          e = 0.2575
          U = 251.80 years

     The telegraphed value of U gives a = 39.875.


COMET WILK (1930c)
     With Prof. Banachiewicz' elements given in Circ. 278-279
Mr. Jens P. Moller has computed the following ephemeris
(Circ. 279 cont.):

                    0h U.T.
     1930        R.A.     Decl.      r      Delta
     June 17   17 28.7  +14  8
          21      14.0   10  4     1.749    0.817
          25   17  1.7    6 23
          29   16 51.5    3  6     1.872    0.948
     July  3      43.1  + 0 12
           7   16 36.3  - 2 25     1.992    1.107

Erratum
     In Circ. 285 for -22m12s daily motion in R.A. (comet 1930d
observed 1930 June 3 by Mr. Blathwayt) read +22m12s.


1930 June 18                     (289)             Elis Stromgren

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