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IAUC 5602: 1992 QN; (4179)

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                                                  Circular No. 5602
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)


1992 QN
     E. F. Helin reports her discovery of a fast-moving asteroidal
object on exposures with the 0.46-m Schmidt at Palomar.  K. J.
Lawrence, J. Alu and P. Rose assisted, Rose making the measurements:

     1992 UT             R.A. (2000) Decl.       Mag.
     Aug. 29.33611   22 39 57.86   -21 18 18.3   16.5
          29.36059   22 39 52.88   -21 18 10.9
          31.31563   22 33 47.86   -21 05 27.0
          31.33802   22 33 43.68   -21 05 16.8
     Sept. 1.33576   22 30 44.06   -20 58 10.5
           2.21563   22 28 10.78   -20 51 37.7
           2.24028   22 28 06.33   -20 51 26.0

     Orbital elements by G. V. Williams, Center for Astrophysics:

     T = 1992 Apr. 15.170 TT          Peri. = 201.649
     e = 0.34766                      Node  = 356.453   2000.0
     q = 0.77239 AU                   Incl. =   9.281
       a =  1.18403 AU     n = 0.765000     P =   1.29 years

1992 TT     R. A. (2000) Decl.     Delta      r    Elong. Phase      V
Aug. 26    22 50.96    -21 35.8    0.381    1.384  166.6    9.8     15.7
     31    22 34.76    -21 07.3    0.401    1.404  167.4    9.0     15.9
Sept. 5    22 20.48    -20 28.9    0.427    1.423  163.7   11.4     16.1
     10    22 08.45    -19 43.4    0.457    1.441  158.1   15.1     16.4
     15    21 58.79    -18 53.6    0.492    1.458  152.1   18.8     16.7
     20    21 51.42    -18 01.4    0.530    1.474  146.2   22.3     17.0
     25    21 46.17    -17 08.3    0.572    1.490  140.6   25.3     17.3
     30    21 42.86    -16 15.1    0.617    1.504  135.3   27.9     17.6
Oct.  5    21 41.26    -15 22.1    0.664    1.517  130.4   30.2     17.8


(4179) TOUTATIS
     M. Nolan and E. Howell, Lunar and Planetary Laboratory, report
that CCD photometry with the 1.5-m reflector at the Catalina Station
gave V = 15.52 +/- 0.05 on Aug. 27.23 UT.  This indicates that the
close-approach prediction in Efemeridy Malykh Planet for 1992 (pages
465-466, 486-487) requires correction by +1 mag.


1992 September 3               (5602)              Brian G. Marsden

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