Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 2248: 1970f; P/AREND-RIGAUX

The following International Astronomical Union Circular may be linked-to from your own Web pages, but must not otherwise be redistributed (see these notes on the conditions under which circulars are made available on our WWW site).


Read IAUC 2247  SEARCH Read IAUC 2249
IAUC number


                                                  Circular No. 2248
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Cable Address: SATELLITES, NEWYORK
Western Union: RAPID SATELLITE CAMBMASS


COMET WHITE-ORTIZ-BOLELLI (1970f)

     The following positions have been reported:

     1970 UT             R. A. (1950) Decl.       Mag.   Observer
     May  22.329       4 57         +14            5     Matchett
          22.333       5 00         +13            4     McMillan
          24.93652     5 17 06.48   +12 36 36.1    3     Pereyra
          26.384       5 24.8       +12 02         5     S.A.O. Woomera

V. L. Matchett and S. C. McMillan (Brisbane).  Observations very
   approximate; altitude 3o, twilight.  Comet centrally condensed.
   Tail 10o in p.a. 105o (Matchett), 7o (McMillan).
Z. M. Pereyra (Cordoba Observatory for the CNEGH).  Tail 12o.
   Correction to telegraphed position.
S.A.O. Woomera.  Tail 15o.

     Many of the observations are inconsistent, but the comet
evidently belongs to the Kreutz sungrazing group.  The elements below
are uncertain, q being assumed so that the direction of perihelion
(L = 282.0, B = +34.8) is the same as for the other members.  The
comet will shortly reach its maximum elongation (22o) from the
sun.

       T = 1970 May 14.5 ET      Peri. =  62.3
                                 Node  = 337.6     1950.0
       q = 0.0090 AU (assumed)   Incl. = 139.8

     1970 ET     R. A. (1950) Decl.     Delta     r     Mag.
     May  28     5 32.55    +11 26.4
          30     5 41.23    +10 46.4    1.510   0.676    6.2
     June  1     5 49.06    +10 09.9
           3     5 56.21    + 9 36.3    1.631   0.789    7.0
           5     6 02.78    + 9 05.3
           7     6 08.86    + 8 36.3    1.748   0.894    7.7
           9     6 14.53    + 8 09.1
          11     6 19.83    + 7 43.3    1.859   0.994    8.3
          13     6 24.82    + 7 18.9

             Mag. = 7.0 + 5 log Delta + 10 log r


PERIODIC COMET AREND-RIGAUX
       The following predicted elements and ephemeris, by the
undersigned, are based on an orbit satisfying 65 observations made at
the 1951, 1958 and 1963 apparitions.  Perturbations by Mercury to
Pluto have been taken into account.

       T = 1971 Apr. 6.0213 ET    Epoch = 1971 Mar. 30.0 ET
   Peri. = 328.9367                   e =   0.599095
   Node  = 121.5554   1950.0          a =   3.602782 AU
   Incl. =  17.8336                   n =   0.1441276
       q =   1.444373 AU              P =   6.838 years

     1970/71 ET  R. A. (1950) Decl.     Delta     r     Mag.
     July 13     0 17.70    -12 56.2    2.381   2.897   20.3
          23     0 23.04    -13 51.1
     Aug.  2     0 26.67    -15 06.0    2.034   2.768   19.8
          12     0 28.25    -16 41.3
          22     0 27.52    -17 35.3    1.749   2.637   19.2
     Sept. 1     0 24.29    -20 43.4
          11     0 18.60    -22 57.0    1.549   2.503   18.7
          21     0 10.86    -25 04.5
     Oct.  1     0 01.87    -25 52.8    1.449   2.368   18.5
          11    23 52.82    -28 10.6
          21    23 45.03    -28 51.2    1.441   2.233   18.6
          31    23 39.62    -28 53.3
     Nov. 10    23 37.35    -28 19.2    1.493   2.098   18.7
          20    23 38.55    -27 13.7
          30    23 43.18    -25 41.1    1.572   1.966   18.8
     Dec. 10    23 51.05    -23 45.5
          20     0 01.82    -21 30.0    1.652   1.840   18.9
          30     0 15.18    -18 56.7
     Jan.  9     0 30.85    -16 07.4    1.719   1.722   18.9
          19     0 48.58    -13 03.9
          29     1 08.20    - 9 47.5    1.771   1.618   18.8
     Feb.  8     1 29.59    - 6 20.7
          18     1 52.65    - 2 45.9    1.813   1.534   18.7
          28     2 17.37    + 0 53.5
     Mar. 10     2 43.70    + 4 33.3    1.856   1.475   18.7
          20     3 11.61    + 8 08.6
          30     3 41.07    +11 33.8    1.913   1.446   18.6
     Apr.  9     4 11.96    +14 43.1
          19     4 44.11    +17 30.9    1.994   1.452   18.7
          29     5 17.2T    +19 52.3
     May   9     5 51.09    +21 43.7    2.105   1.489   18.8
          19     6 25.12    +23 03.1
          29     6 58.96    +23 50.3    2.245   1.557   18.9
     June  8     7 32.15    +24 06.6
          18     8 04.34    +23 55.1    2.411   1.647   19.1

     Mag. = 15.5 + 5 log Delta + 5 log r + 0.03 (phase-angle)


1970 May 29                    (2248)              Brian G. Marsden

Read IAUC 2247  SEARCH Read IAUC 2249


Our Web policy. Index to the CBAT/MPC/ICQ pages.


Valid HTML 4.01!