Update for (754) Malabar - October 15/16, 2003

Jan Manek's update

                   IOTA/IOTA-ES occultation update for
           (754) Malabar / TYC 5080-01344-1 on October 15/16, 2003
         visible from Ireland, England, Belgium, Netherlands, Germany,
                   Czechia, Austria, Slovakia and Hungary


Summary 

In the night of October 15/16, 2003 a faint 10.7 mag star TYC 5080-01344-1 will be occulted by a 89 km asteroid (754) Malabar. This update is based on USNO/Flagstaff astrometry for the asteroid and UCAC2 star position.

The updated path shows 1/5 path width north shift with no time correction compared to Steve Preston's prediction.

Path runs over Ireland ~19:29.4 UT, England ~19:29.6 UT, Belgium and Netherlands ~19:29.7 UT, Germany ~19:29.8 UT, Czechia ~19:30.0 UT, Austria and Slovakia ~19:30.1 UT and Hungary ~19:30.2 UT. Please check the path chart for details.

Very short vent at low and very altitudes at the end of path. Video highly recommended for sure event observation. Clear sky and good luck !!!

The event at one glimpse:
 * date and approx. UT time of event: October 15, 2003 @ 19:30 UT (Europe)
 * magnitude of target star: 10.7
 * magnitude drop [mag]: 4.5
 * estimated maximum duration [s]: 2.8
 * path description: given above
 * Goffin's original chart reference: non-Goffin event; found by Steve Preston

The occultation path:
 * approximate ground width [km]: 220
 * uncertainty [path widths]: 2.2
 * uncertainty in time [s]: 7
 * map: below
 * remarks: Path uncertainties are given according to nominal star
    position errors and expected asteroid positional accuracy.

Data for the target star:
 * name: TYC 5080-01344-1
 * constellation: Ophiuchus
 * J2000 position [h,m,s; o,',"]: 17h 32m 54.1642s; -01o 29' 24.659"
 * position source: UCAC2
 * estimated accuracy ["]: 0.04" (0.02", 0.03")
 * V mag [mag]: 10.71
 * B-V [mag]: +1.16
 * remarks:
    Target star is in middle Ophiuchus, about 6.6 degrees southwest of 2.7 mag star beta Ophiuchi = SAO 122671.
    !!! IMPORTANT !!!
    Purple stars in identification chart are so called 'non-star' objects in GSC; in dense fields
    the 'non-stars' are often real stars or blends of close pairs. Be careful about this.

Close finding chart (prepared in GUIDE8):
 * occulted star is in center - labeled with cross
 * field is 3.0x3.0 degrees
 * limiting magnitude is 13.0
 * labeled stars have indicated SAO numbers
 * remarks: Second chart shows 30' blowup to show correctly the star in field.










Data for the minor planet:
 * general information:
     number, name: (754) Malabar
     approx. diameter [km]: 89
 * orbital information
     orbit source: calculation Manek
     source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
     number of used observations: 141 USNO, 14 TMO
     number of rejected observations: 16 USNO
     time covered by the observations: 1998 04 24 - 2003 08 06
     rms residuals ["] (RA,DE): 0.08", 0.09"
     estimated positional accuracy at epoch of event ["]: 0.07", 0.08"
     remarks:

Data for the event:
 * UT date and time of least geocentric approach: 19:28.9 UT
 * approx. V mag of minor planet at event [mag]: 15.2
 * geocentric parallax of minor planet ["]: 2.545
 * magnitude drop [mag]: 4.5
 * estimated maximum duration [s]: 2.8
 * apparent motion of minor planet ["/h]: 46.35
 * angular distance to moon, phase of moon [deg,%]: 156, 75%
 * remarks:

Elements for WinOccult:
============ cut here ===========================================
 2003 Oct 15
  754  Malabar
19h 28.9m UT
  10.7   17 32 54.164- 1 29 24.66TYC 5080-01344-1      11.9
15.2     89    2.8   3.456     2.907    -15.01
  -52.925  -1.485  -115.78   -8.58
 19.4822   .29602   .86297 17.13127 -5.90082  0.00516  0.00079
2000    159.885585200310 8.00000296.183000180.22972124.510673 0.050355872.988620742.838126149.195   0.15
RATE 1.9076470 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000
============ cut here ===========================================

Calculator(s): Jan Manek








Path coordinates:
                  Centre              Star  Star   Sun      Path Limits           Error Limits
  E. Longitude   Latitude      U.T.    Alt    Az   Alt    Limit 1    Limit 2    Limit 3    Limit 4
    ...................................... shortened .............................................
                                                         Latitude   Latitude   Latitude   Latitude
      o  '  "     o  '  "    h  m  s     o     o     o    o  '  "    o  '  "    o  '  "    o  '  "
   - 20  0  0    59 40 31   19 28 51    24   216   -10   58 24 36   61  1 48   53 28 21   69 19  1
   - 19  0  0    59 14 40   19 28 54    24   218   -11   57 59 25   60 35  7   53  5 10   68 42 10
   - 18  0  0    58 49  6   19 28 56    24   219   -11   57 34 31   60  8 44   52 42 14   68  6 13
   - 17  0  0    58 23 49   19 28 58    24   220   -12   57  9 53   59 42 40   52 19 34   67 31  6
   - 16  0  0    57 58 51   19 29  1    24   221   -12   56 45 33   59 16 55   51 57  9   66 56 49
   - 15  0  0    57 34 12   19 29  3    24   222   -13   56 21 31   58 51 31   51 35  2   66 23 20
   - 14  0  0    57  9 53   19 29  5    24   223   -14   55 57 49   58 26 28   51 13 12   65 50 38
   - 13  0  0    56 45 56   19 29  8    24   225   -14   55 34 28   58  1 48   50 51 41   65 18 41
   - 12  0  0    56 22 21   19 29 10    23   226   -15   55 11 28   57 37 31   50 30 29   64 47 30
   - 11  0  0    55 59  8   19 29 12    23   227   -15   54 48 49   57 13 37   50  9 36   64 17  3
   - 10  0  0    55 36 19   19 29 15    23   228   -16   54 26 33   56 50  9   49 49  5   63 47 19
   -  9  0  0    55 13 54   19 29 17    23   229   -17   54  4 41   56 27  5   49 28 54   63 18 19
   -  8  0  0    54 51 54   19 29 19    23   230   -17   53 43 13   56  4 28   49  9  6   62 50  2
   -  7  0  0    54 30 19   19 29 22    23   231   -18   53 22  9   55 42 17   48 49 39   62 22 27
   -  6  0  0    54  9 11   19 29 24    22   232   -19   53  1 30   55 20 33   48 30 36   61 55 35
   -  5  0  0    53 48 29   19 29 26    22   233   -19   52 41 18   54 59 18   48 11 56   61 29 25
   -  4  0  0    53 28 15   19 29 28    22   234   -20   52 21 31   54 38 30   47 53 41   61  3 57
   -  3  0  0    53  8 28   19 29 31    21   235   -21   52  2 12   54 18 12   47 35 50   60 39 11
   -  2  0  0    52 49 10   19 29 33    21   237   -21   51 43 21   53 58 23   47 18 24   60 15  7
   -  1  0  0    52 30 21   19 29 35    21   238   -22   51 24 57   53 39  4   47  1 23   59 51 44
      0  0  0    52 12  1   19 29 37    20   239   -23   51  7  2   53 20 15   46 44 49   59 29  3
      1  0  0    51 54 10   19 29 39    20   240   -23   50 49 35   53  1 57   46 28 41   59  7  3
      2  0  0    51 36 50   19 29 41    20   241   -24   50 32 38   52 44 10   46 13  0   58 45 45
      3  0  0    51 20  0   19 29 43    19   242   -25   50 16 11   52 26 54   45 57 46   58 25  8
      4  0  0    51  3 41   19 29 45    19   242   -25   50  0 13   52 10 10   45 42 59   58  5 13
      5  0  0    50 47 53   19 29 47    18   243   -26   49 44 46   51 53 59   45 28 41   57 45 59
      6  0  0    50 32 37   19 29 49    18   244   -27   49 29 50   51 38 20   45 14 51   57 27 26
      7  0  0    50 17 53   19 29 50    17   245   -27   49 15 25   51 23 14   45  1 29   57  9 35
      8  0  0    50  3 41   19 29 52    17   246   -28   49  1 31   51  8 41   44 48 37   56 52 25
      9  0  0    49 50  1   19 29 54    16   247   -29   48 48  9   50 54 41   44 36 13   56 35 56
     10  0  0    49 36 54   19 29 55    16   248   -29   48 35 18   50 41 15   44 24 19   56 20  9
     11  0  0    49 24 20   19 29 57    15   249   -30   48 23  0   50 28 22   44 12 55   56  5  3
     12  0  0    49 12 19   19 29 59    15   250   -31   48 11 14   50 16  4   44  2  0   55 50 38
     13  0  0    49  0 51   19 30  0    14   251   -31   48  0  1   50  4 20   43 51 36   55 36 55
     14  0  0    48 49 57   19 30  1    14   252   -32   47 49 20   49 53 10   43 41 42   55 23 52
     15  0  0    48 39 36   19 30  3    13   252   -33   47 39 13   49 42 34   43 32 18   55 11 32
     16  0  0    48 29 49   19 30  4    13   253   -33   47 29 38   49 32 34   43 23 26   54 59 52
     17  0  0    48 20 37   19 30  5    12   254   -34   47 20 37   49 23  8   43 15  4   54 48 53
     18  0  0    48 11 58   19 30  7    11   255   -35   47 12  9   49 14 17   43  7 13   54 38 36
     19  0  0    48  3 54   19 30  8    11   256   -35   47  4 15   49  6  1   42 59 53   54 29  0
     20  0  0    47 56 24   19 30  9    10   256   -36   46 56 54   48 58 21   42 53  4   54 20  5
     21  0  0    47 49 28   19 30 10     9   257   -37   46 50  7   48 51 15   42 46 47   54 11 51
     22  0  0    47 43  7   19 30 11     9   258   -37   46 43 54   48 44 45   42 41  1   54  4 19
     23  0  0    47 37 20   19 30 12     8   259   -38   46 38 15   48 38 51   42 35 47   53 57 27
     24  0  0    47 32  9   19 30 12     8   260   -39   46 33 10   48 33 32   42 31  4   53 51 17
     25  0  0    47 27 32   19 30 13     7   260   -39   46 28 39   48 28 48   42 26 53   53 45 48
     26  0  0    47 23 29   19 30 14     6   261   -40   46 24 42   48 24 40   42 23 14   53 41  0
     27  0  0    47 20  2   19 30 14     6   262   -40   46 21 18   48 21  7   42 20  6   53 36 52
     28  0  0    47 17  9   19 30 15     5   263   -41   46 18 30   48 18 10   42 17 31   53 33 26
     29  0  0    47 14 51   19 30 15     4   263   -41   46 16 15   48 15 49   42 15 27   53 30 41
     30  0  0    47 13  8   19 30 16     4   264   -42   46 14 34   48 14  3   42 13 55   53 28 37
     31  0  0    47 12  0   19 30 16     3   265   -42   46 13 28   48 12 53   42 12 54   53 27 13
    ...................................... shortened .............................................

----------------------------------------------------------------------------
Jan Manek
Stefanik Observatory                Private :
Petrin 205                          Werichova 950
118 46  Praha 1                     152 00  Praha 5 - Barrandov     |_|_|
Czech Republic                      Czech Republic                  /   \
Internet : jan.manek@worldonline.cz                                |-O-O-|
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