Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 5807: 1993k; 1993e; N Aql 1993

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 5806 SEARCH Read IAUC 5808

View IAUC 5807 in .dvi or .ps format.
IAUC number 

                                                  Circular No. 5807
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
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
MARSDEN@CFA or GREEN@CFA (.SPAN, .BITNET or .HARVARD.EDU)


PERIODIC COMET SHAJN-SCHALDACH (1993k)
     J. V. Scotti, Lunar and Planetary Laboratory, reports his
recovery of this comet with the 0.9-m Spacewatch telescope at Kitt
Peak:

     1993 UT             R.A. (2000) Decl.        m1
     May  27.43324   23 33 53.03   - 1 10 35.0
          27.44212   23 33 53.67   - 1 10 31.4   19.8
          27.45291   23 33 54.57   - 1 10 26.3   20.0
          28.43489   23 35 14.00   - 1 03 06.9
          28.44249   23 35 14.74   - 1 03 03.7   19.6
          28.45151   23 35 15.41   - 1 02 58.9   19.5

On May 27 there was a coma 10" across and a tail extending 0'.55 in
p.a. 257 deg.  The indicated correction to the prediction on MPC
16381 (ephemeris on MPC 21959) is Delta(T) = -0.03 day.


PERIODIC COMET SHOEMAKER-LEVY 9 (1993e)
     Further to IAUC 5801, A. Carusi, Consiglio Nazionale delle
Ricerche, Rome (not Rome University), confirms that the orbit on
IAUC 5800 shows that the center of the comet's nuclear train will
collide with Jupiter in 1994, and he suggests that -- during July
23-27 -- this would be the fate of the whole train; the "window"
for a collision is in fact more than 30 times the length of the
observed train.  In the case of a glancing strike, it would be the
trailing nuclei (those with a positive change in true anomaly at
the 1992 encounter) that survive to escape from jovicentric to
heliocentric short-period orbits.
     D. K. Yeomans, Jet Propulsion Laboratory, remarks that
computations by P. Chodas and himself using observations extending to
May 20 indicate that the probability that the center of the nuclear
train will collide with Jupiter in late-July 1994 is as high as 64
percent.


NOVA AQUILAE 1993
     Further CCD photometry:  May 20.047 UT, V = 7.75 +/- 0.03, B-V
= +0.55 +/- 0.05 (H. Mikuz, Ljubljana, Slovenia; cf. IAUC 5794);
23.028, V = 7.48 +/- 0.02 (Mikuz); 25.98, V = 7.96 +/- 0.05, B-V =
+0.52 +/- 0.05, U-B = -0.37 +/- 0.1 (D. Hanzl, N. Copernicus
Observatory, Brno; comparison star HD 178574, V = 7.56, B-V = +0.48, U-B
= -0.02).


1993 May 28                    (5807)            Daniel W. E. Green

Read IAUC 5806 SEARCH Read IAUC 5808

View IAUC 5807 in .dvi or .ps format.

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

Valid HTML 4.01!