Update for (524) Fidelio - March 7, 2002

Jan Manek's update

                    IOTA/IOTA-ES occultation update for
            (524) Fidelio / TYC 1903-00310-1 on March 7, 2002
      visible from Sweden, W Latvia, W Lithuania, W Belarus, NE Poland
       W Ukraine, E Romania, E Bulgaria, W Turkey and Sinai peninsula

Summary 

In the evening of March 7, 2002 a 10.6 mag star TYC 1903-00310-1 will be occulted by a 74 km asteroid (524) Fidelio. This update is based on USNO/Flagstaff and TMO astrometry for the asteroid and UCAC star position.

The updated path shows ~3 path width east shift with time ~0.4 minutes earlier compared to Edwin Goffin's nominal prediction.

Updated path runs from north to south over north Sweden ~20:09 UT, W Latvia ~20:11 UT, W Lithuania ~20:11.5 UT, W Belarus and NE Poland ~20:12.5 UT, W Ukraine ~20:13.5 UT, E Romania ~20:15 UT, E Bulgaria 20:15.5 UT, W Turkey ~20:17 UT and Sinai peninsula ~20:20 UT. Much larger area is covered taking uncertainty into consideration. Please check the path chart for details.

Clear sky and good luck !!!

The event at one glimpse:
 * date and approx. UT time of event: March 7, 2002 @ 20:13 UT (Euro)
 * magnitude of target star: 10.6
 * magnitude drop [mag]: 3.7
 * estimated maximum duration [s]: 13.0
 * path description: given above
 * Goffin's original chart reference: A02_0329

The occultation path:
 * approximate ground width [km]: 85
 * uncertainty [path widths]: 1.5
 * uncertainty in time [s]: 20
 * 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 1903-00310-1
 * constellation: Gemini
 * J2000 position [h,m,s; o,',"]: 07h 06m 17.8899s; +26o 38' 05.852"
 * position source: UCAC combined with Tycho-2 proper motion
 * estimated accuracy ["]: 0.01" (0.010", 0.010")
 * V mag [mag]: 10.58
 * B-V [mag]: +1.12
 * remarks:
    Recent UCAC position was provided by Marion and Norbert Zacharias.
    Target star is in middle Gemini, about midway between 3.8 mag iota Geminorum = SAO 79374 and
    3.0 mag epsilon Geminorum = SAO 78682.

Close finding chart (prepared in GUIDE7):
 * occulted star is in center - labeled with cross
 * field is 2.5x2.5 degrees
 * limiting magnitude is 13.0
 * labeled stars have indicated SAO numbers
 * remarks:





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: 95 USNO, 1 TMO
     number of rejected observations: 5 USNO
     time covered by the observations: 1998 03 12 - 2002 02 26
     rms residuals ["] (RA,DE): 0.11", 0.12"
     estimated positional accuracy at epoch of event ["]: 0.07", 0.07"
     remarks:

Data for the event:
 * UT date and time of least geocentric approach: 20:16.0 UT
 * approx. V mag of minor planet at event [mag]: 14.3
 * geocentric parallax of minor planet ["]: 4.616
 * magnitude drop [mag]: 3.7
 * estimated maximum duration [s]: 13.0
 * apparent motion of minor planet ["/h]: 14.87
 * angular distance to moon, phase of moon [deg,%]: 173, 32%
 * remarks:

Calculator(s): Jan Manek








Path coordinates:
                                                   Latitude   Latitude
                  Center               Altitude       Path Limits
  E. Longitude   Latitude      U.T.   star   sun   Limit 1    Limit 2
   ........................... shortened .............................
      o  '  "     o  '  "    h  m  s     o     o    o  '  "    o  '  "
     13  0  0    70 13 38   20  7  6    46   -18   69  0 57   71 28 40
     14  0  0    69  8 49   20  7 24    47   -19   67 54 28   70 25 42
     15  0  0    67 58 53   20  7 45    48   -20   66 42 57   69 17 29
     16  0  0    66 43 31   20  8  7    49   -21   65 26  9   68  3 42
     17  0  0    65 22 28   20  8 31    50   -22   64  3 50   66 44  4
     18  0  0    63 55 33   20  8 58    51   -24   62 35 50   65 18 20
     19  0  0    62 22 37   20  9 27    52   -25   61  2  4   63 46 21
     20  0  0    60 43 40   20  9 58    53   -27   59 22 32   62  8  2
     21  0  0    58 58 44   20 10 31    54   -28   57 37 19   60 23 26
     22  0  0    57  8  2   20 11  7    55   -30   55 46 37   58 32 43
     23  0  0    55 11 51   20 11 45    56   -32   53 50 45   56 36 11
     24  0  0    53 10 38   20 12 25    57   -34   51 50  9   54 34 17
     25  0  0    51  4 55   20 13  8    58   -36   49 45 21   52 27 34
     26  0  0    48 55 21   20 13 52    59   -38   47 36 59   50 16 43
     27  0  0    46 42 40   20 14 37    59   -40   45 25 43   48  2 28
     28  0  0    44 27 38   20 15 24    60   -42   43 12 18   45 45 39
     29  0  0    42 11  1   20 16 11    60   -45   40 57 30   43 27  5
     30  0  0    39 53 38   20 16 59    60   -47   38 42  2   41  7 36
     31  0  0    37 36 12   20 17 47    59   -49   36 26 37   38 47 60
     32  0  0    35 19 27   20 18 35    59   -51   34 11 56   36 29  1
     33  0  0    33  3 60   20 19 22    58   -54   31 58 34   34 11 18
     34  0  0    30 50 23   20 20  8    57   -56   29 47  3   31 55 28
     35  0  0    28 39  6   20 20 53    55   -58   27 37 49   29 41 59
     36  0  0    26 30 31   20 21 37    54   -60   25 31 14   27 31 16
     37  0  0    24 24 57   20 22 20    53   -63   23 27 37   25 23 37
     38  0  0    22 22 38   20 23  0    51   -65   21 27 10   23 19 19
     39  0  0    20 23 44   20 23 40    50   -67   19 30  4   21 18 31
     40  0  0    18 28 22   20 24 17    48   -69   17 36 25   19 21 22
     41  0  0    16 36 37   20 24 53    46   -71   15 46 18   17 27 54
     42  0  0    14 48 30   20 25 26    45   -73   13 59 44   15 38  9
     43  0  0    13  4  1   20 25 58    43   -75   12 16 42   13 52  8
     44  0  0    11 23  7   20 26 28    41   -76   10 37 11   12  9 47
     45  0  0     9 45 46   20 26 57    39   -78    9  1  9   10 31  5
     46  0  0     8 11 54   20 27 24    38   -80    7 28 30    8 55 55
     47  0  0     6 41 25   20 27 49    36   -81    5 59 11    7 24 14
     48  0  0     5 14 14   20 28 13    34   -82    4 33  6    5 55 55
     49  0  0     3 50 16   20 28 35    33   -83    3 10 10    4 30 53
     50  0  0     2 29 25   20 28 55    31   -84    1 50 17    3  9  2
   ........................... 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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