Update for (524) Fidelio - April 24/25, 2003 - South Africa

  • Update computed by Jan Manek;   issued 20 Apr 2003 21:12 +0200 (CEST)

    • Jan Manek's update

                        IOTA/IOTA-ES occultation update for
             (524) Fidelio / TYC 6132-00531-1 on April 24/25, 2003
              visible from N South Africa, S Namibia, NE Brasilia,
                French Guyana, Surinam, Guyana and N Venezuela

Summary

    In the night of April 24/25, 2003 a faint 11.6 mag star TYC 6132-00531-1 will be occulted by a 74 km asteroid (524) Fidelio. This update is based on USNO/Flagstaff and TMO astrometry for the asteroid and UCAC1 star position.

    The updated path shows ~8 path width north shift with time 0.8 minutes later compared to Edwin Goffin's nominal prediction.

    Updated path runs over N South Africa around 23:26.5 UT, S Namibia ~23:27.7 UT, NE Brasilia around 23:35.5 UT, French Guyana ~23:36.5 UT, Surinam ~23:36.8 UT, Guyana ~23:37.0 UT and N Venezuela around 23:37.5 UT with Caracas north of path but within error limits. Please check the path chart for details.

    Clear sky and good luck !!!

    
The event at one glimpse:
 * date and approx. UT time of event: April 09, 2003 @ 23:27 UT (South Africa)
                                                       23:36 UT (South America)
 * magnitude of target star: 11.6
 * magnitude drop [mag]: 2.5
 * estimated maximum duration [s]: 5.6
 * path description: given above
 * Goffin's original chart reference: A03_0445

The occultation path:
 * approximate ground width [km]: 75
 * uncertainty [path widths]: 0.9
 * uncertainty in time [s]: 6
 * 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 6132-00531-1
 * constellation: Virgo
 * J2000 position [h,m,s; o,',"]: 13h 27m 52.9070s; -21o 10' 43.473"
 * position source: UCAC1
 * estimated accuracy ["]: 0.03" (0.02", 0.02")
 * V mag [mag]: 11.57
 * B-V [mag]: +0.54
 * remarks:
    Target star is in south Virgo, about 2.9 degrees NE of 3.0 mag star gamma Hydrae = SAO 181543.
    Target star is western component of 24" wide equal brightness pair.
    !!! 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 4.0x4.0 degrees
 * limiting magnitude is 12.5
 * labeled stars have indicated SAO numbers
 * remarks: Second chart is 30' blowup to show correctly the target star in the field.



    Close finding chart


    Close finding chart


    

Data for the minor planet:
 * general information:
     number, name: (524) Fidelio
     approx. diameter [km]: 74
 * orbital information
     orbit source: calculation Manek
     source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
     number of used observations: 119 USNO, 1 TMO
     number of rejected observations: 12 USNO
     time covered by the observations: 1998 03 12 - 2003 04 11
     rms residuals ["] (RA,DE): 0.10", 0.11"
     estimated positional accuracy at epoch of event ["]: 0.04", 0.04"
     remarks:

Data for the event:
 * UT date and time of least geocentric approach: 23:30.1 UT
 * approx. V mag of minor planet at event [mag]: 14.0
 * geocentric parallax of minor planet ["]: 4.468
 * magnitude drop [mag]: 2.5
 * estimated maximum duration [s]: 5.6
 * apparent motion of minor planet ["/h]: 33.60
 * angular distance to moon, phase of moon [deg,%]: 112, 35%
 * remarks:

Elements for WinOccult:
============ cut here ===========================================
 2003 Apr 24
524 Fidelio
23h 30.1m UT
32-00531-1  11.6   13 27 52.907-21 10 43.47TYC 6132-00531-1
14.0     74    5.6   1.968    -2.263     11.25
   -3.144 -21.182  -173.00   12.98
 23.5023   .00462   .01350 -7.08709  2.51725  0.00095  0.00080
2000    158.6394162003 421.0000079.642795 326.8509948.224114  0.129377442.633989502.293210699.835   0.15
RATE 2.3055940 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000
============ cut here ===========================================

Calculator(s): Jan Manek



    Updated path location for (524) Fidelio on April 24/25, 2003


    Updated path location for (524) Fidelio on April 24/25, 2003


    

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
                                                         Latitude   Latitude   Latitude   Latitude
    ...................................... shortened .............................................
      o  '  "     o  '  "    h  m  s     o     o     o    o  '  "    o  '  "    o  '  "    o  '  "
     37  0  0   -27 45 19   23 25 28    54   272   -59  -27 25 16  -28  5 23  -26 47 33  -28 43  4
     36  0  0   -27 42 42   23 25 34    55   272   -60  -27 22 38  -28  2 46  -26 44 54  -28 40 28
     35  0  0   -27 39 39   23 25 40    56   272   -61  -27 19 35  -27 59 43  -26 41 50  -28 37 27
     34  0  0   -27 36 11   23 25 46    57   273   -62  -27 16  6  -27 56 16  -26 38 20  -28 34  1
     33  0  0   -27 32 17   23 25 52    58   273   -63  -27 12 11  -27 52 23  -26 34 24  -28 30  9
     32  0  0   -27 27 58   23 25 58    58   274   -63  -27  7 52  -27 48  5  -26 30  3  -28 25 52
     31  0  0   -27 23 14   23 26  4    59   274   -64  -27  3  7  -27 43 21  -26 25 16  -28 21 11
     30  0  0   -27 18  4   23 26 11    60   274   -65  -26 57 56  -27 38 12  -26 20  4  -28 16  3
     29  0  0   -27 12 29   23 26 17    61   275   -66  -26 52 20  -27 32 38  -26 14 26  -28 10 31
     28  0  0   -27  6 29   23 26 23    62   275   -67  -26 46 18  -27 26 39  -26  8 22  -28  4 34
     27  0  0   -27  0  3   23 26 30    63   276   -67  -26 39 51  -27 20 14  -26  1 53  -27 58 11
     26  0  0   -26 53 11   23 26 36    64   276   -68  -26 32 59  -27 13 24  -25 54 58  -27 51 23
     25  0  0   -26 45 54   23 26 43    64   276   -69  -26 25 41  -27  6  8  -25 47 38  -27 44 10
     24  0  0   -26 38 12   23 26 50    65   277   -70  -26 17 57  -26 58 27  -25 39 52  -27 36 31
     23  0  0   -26 30  4   23 26 56    66   277   -70  -26  9 48  -26 50 21  -25 31 40  -27 28 28
     22  0  0   -26 21 31   23 27  3    67   278   -71  -26  1 13  -26 41 49  -25 23  3  -27 19 59
     21  0  0   -26 12 32   23 27 10    68   278   -72  -25 52 13  -26 32 52  -25 13 59  -27 11  4
     20  0  0   -26  3  8   23 27 17    69   278   -73  -25 42 47  -26 23 29  -25  4 31  -27  1 45
     19  0  0   -25 53 18   23 27 24    70   279   -73  -25 32 56  -26 13 41  -24 54 36  -26 52  0
     18  0  0   -25 43  3   23 27 31    71   279   -74  -25 22 38  -26  3 28  -24 44 16  -26 41 49
     17  0  0   -25 32 22   23 27 38    72   279   -75  -25 11 56  -25 52 48  -24 33 30  -26 31 14
     16  0  0   -25 21 16   23 27 45    72   279   -75  -25  0 47  -25 41 44  -24 22 18  -26 20 12
     15  0  0   -25  9 44   23 27 52    73   280   -76  -24 49 14  -25 30 14  -24 10 40  -26  8 46
     14  0  0   -24 57 46   23 27 59    74   280   -77  -24 37 14  -25 18 18  -23 58 37  -25 56 54
     13  0  0   -24 45 23   23 28  7    75   280   -77  -24 24 49  -25  5 57  -23 46  8  -25 44 36
     12  0  0   -24 32 34   23 28 14    76   280   -78  -24 11 58  -24 53 10  -23 33 13  -25 31 53
     11  0  0   -24 19 19   23 28 21    77   281   -78  -23 58 41  -24 39 58  -23 19 53  -25 18 45
     10  0  0   -24  5 39   23 28 29    78   281   -79  -23 44 59  -24 26 20  -23  6  7  -25  5 11
    ...................................... shortened .............................................
   - 32  0  0   - 8 28 21   23 34  6    60   119   -52  - 8  5 57  - 8 50 45  - 7 23 49  - 9 32 51
   - 33  0  0   - 7 58 40   23 34 14    59   119   -51  - 7 36 14  - 8 21  6  - 6 54  3  - 9  3 16
   - 34  0  0   - 7 28 46   23 34 21    58   119   -50  - 7  6 18  - 7 51 13  - 6 24  3  - 8 33 26
   - 35  0  0   - 6 58 38   23 34 29    57   119   -49  - 6 36  8  - 7 21  7  - 5 53 50  - 8  3 23
   - 36  0  0   - 6 28 17   23 34 36    56   119   -48  - 6  5 46  - 6 50 48  - 5 23 25  - 7 33  7
   - 37  0  0   - 5 57 44   23 34 44    55   119   -47  - 5 35 11  - 6 20 16  - 4 52 47  - 7  2 38
   - 38  0  0   - 5 27  0   23 34 51    54   119   -46  - 5  4 25  - 5 49 33  - 4 21 59  - 6 31 58
   - 39  0  0   - 4 56  5   23 34 59    53   119   -45  - 4 33 29  - 5 18 40  - 3 51  0  - 6  1  7
   - 40  0  0   - 4 25  0   23 35  6    52   119   -44  - 4  2 23  - 4 47 36  - 3 19 51  - 5 30  6
   - 41  0  0   - 3 53 46   23 35 13    50   119   -43  - 3 31  8  - 4 16 23  - 2 48 34  - 4 58 55
   - 42  0  0   - 3 22 23   23 35 20    49   119   -42  - 2 59 44  - 3 45  2  - 2 17  8  - 4 27 36
   - 43  0  0   - 2 50 53   23 35 27    48   119   -41  - 2 28 13  - 3 13 33  - 1 45 35  - 3 56  9
   - 44  0  0   - 2 19 16   23 35 34    47   119   -40  - 1 56 35  - 2 41 57  - 1 13 56  - 3 24 35
   - 45  0  0   - 1 47 34   23 35 40    46   119   -39  - 1 24 52  - 2 10 15  - 0 42 11  - 2 52 54
   - 46  0  0   - 1 15 46   23 35 47    45   119   -38  - 0 53  3  - 1 38 28  - 0 10 21  - 2 21  8
   - 47  0  0   - 0 43 53   23 35 54    44   119   -37  - 0 21 10  - 1  6 36    0 21 33  - 1 49 17
   - 48  0  0   - 0 11 58   23 36  0    43   119   -35    0 10 46  - 0 34 41    0 53 30  - 1 17 23
   - 49  0  0     0 20  1   23 36  6    42   119   -34    0 42 45  - 0  2 43    1 25 30  - 0 45 26
   - 50  0  0     0 52  1   23 36 12    40   119   -33    1 14 45    0 29 17    1 57 31  - 0 13 26
   - 51  0  0     1 24  2   23 36 18    39   119   -32    1 46 46    1  1 18    2 29 32    0 18 35
   - 52  0  0     1 56  3   23 36 24    38   119   -31    2 18 48    1 33 20    3  1 33    0 50 36
   - 53  0  0     2 28  4   23 36 30    37   119   -30    2 50 48    2  5 20    3 33 33    1 22 37
   - 54  0  0     3  0  3   23 36 35    36   119   -29    3 22 46    2 37 19    4  5 32    1 54 36
   - 55  0  0     3 31 59   23 36 41    35   119   -28    3 54 42    3  9 15    4 37 27    2 26 33
   - 56  0  0     4  3 52   23 36 46    34   119   -27    4 26 35    3 41  9    5  9 18    2 58 27
   - 57  0  0     4 35 40   23 36 51    33   119   -26    4 58 23    4 12 58    5 41  5    3 30 17
   - 58  0  0     5  7 23   23 36 56    32   119   -25    5 30  5    4 44 42    6 12 47    4  2  2
   - 59  0  0     5 39  1   23 37  1    31   119   -24    6  1 42    5 16 20    6 44 22    4 33 42
   - 60  0  0     6 10 31   23 37  5    29   119   -22    6 33 12    5 47 51    7 15 50    5  5 15
   - 61  0  0     6 41 54   23 37 10    28   118   -21    7  4 34    6 19 15    7 47 11    5 36 41
   - 62  0  0     7 13  9   23 37 14    27   118   -20    7 35 47    6 50 31    8 18 22    6  7 58
   - 63  0  0     7 44 14   23 37 18    26   118   -19    8  6 51    7 21 37    8 49 24    6 39  7
   - 64  0  0     8 15  9   23 37 22    25   118   -18    8 37 45    7 52 33    9 20 15    7 10  5
   - 65  0  0     8 45 53   23 37 26    24   118   -17    9  8 28    8 23 19    9 50 55    7 40 53
   - 66  0  0     9 16 26   23 37 29    23   118   -16    9 38 59    8 53 53   10 21 23    8 11 30
   - 67  0  0     9 46 46   23 37 33    22   118   -15   10  9 17    9 24 14   10 51 39    8 41 55
   - 68  0  0    10 16 52   23 37 36    21   117   -14   10 39 22    9 54 23   11 21 41    9 12  6
   - 69  0  0    10 46 45   23 37 39    20   117   -13   11  9 13   10 24 17   11 51 28    9 42  4
   - 70  0  0    11 16 23   23 37 42    18   117   -12   11 38 50   10 53 58   12 21  1   10 11 48
   - 71  0  0    11 45 46   23 37 45    17   117   -11   12  8 10   11 23 22   12 50 18   10 41 16
   - 72  0  0    12 14 53   23 37 48    16   117   -10   12 37 15   11 52 31   13 19 19   11 10 29
   - 73  0  0    12 43 43   23 37 50    15   116    -8   13  6  3   12 21 23   13 48  3   11 39 25
   - 74  0  0    13 12 16   23 37 52    14   116    -7   13 34 34   12 49 58   14 16 30   12  8  4
   - 75  0  0    13 40 31   23 37 54    13   116    -6   14  2 46   13 18 15   14 44 38   12 36 25
   - 76  0  0    14  8 27   23 37 56    12   116    -5   14 30 40   13 46 14   15 12 28   13  4 28
   - 77  0  0    14 36  4   23 37 58    11   115    -4   14 58 15   14 13 54   15 39 58   13 32 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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