Update for (1049) Gotho - November 13, 2002

Jan Manek's update

                    IOTA/IOTA-ES occultation update for
             (1049) Gotho / TYC 3359-00341-1 on November 13, 2002
                 visible from Alaska, E Norway and England

Summary 

In the night of November 13, 2002 a faint 11.1 mag star TYC 3359-00341-1 will be occulted by a 58 km asteroid (1049) Gotho. This update is based on USNO/Flagstaff and TMO astrometry for the asteroid and Tycho-2 position.

The updated path shows ~7 path width west shift with time correction +1.4 minutes compared to Edwin Goffin's nominal prediction.

Updated path runs over western coast of Alaska ~16:46-16:49 UT, almost over north pole and then hits west coast of Norway ~16:58 UT and England ~16:58.9 UT, just west of London. NW France is also in path but at very low altitudes and evening twilight ~16:59 UT. Please check the path chart for details.

Clear sky and good luck !!!

The event at one glimpse:
 * date and approx. UT time of event: November 13, 2002 @ 16:48 UT (Alaska)
                                                          16:58 UT (Europe)
 * magnitude of target star: 11.1
 * magnitude drop [mag]: 5.4
 * estimated maximum duration [s]: 6.5
 * path description: given above
 * Goffin's original chart reference: A02_1141

The occultation path:
 * approximate ground width [km]: 75
 * uncertainty [path widths]: 2.6
 * uncertainty in time [s]: 15
 * 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 3359-00341-1
 * constellation: Auriga
 * J2000 position [h,m,s; o,',"]: 05h 26m 22.1045s; +45o 03' 41.778"
 * position source: Tycho-2
 * estimated accuracy ["]: 0.06" (0.04", 0.04")
 * V mag [mag]: 11.13
 * B-V [mag]: +0.45
 * remarks:
    Target star is in north Auriga, 1.9 degrees SSE of 0.0 mag star alpha Aurigae
    = Capella = SAO 40186.
    !!! 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 GUIDE7):
 * occulted star is in center - labeled with cross
 * field is 3.5x3.5 degrees
 * limiting magnitude is 12.5
 * labeled stars have indicated SAO numbers
 * remarks:





Data for the minor planet:
 * general information:
     number, name: (1049) Gotho
     approx. diameter [km]: 58
 * orbital information
     orbit source: calculation Manek
     source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
     number of used observations: 53 USNO, 15 TMO
     number of rejected observations: 17 USNO
     time covered by the observations: 1998 02 24 - 2002 11 06
     rms residuals ["] (RA,DE): 0.08", 0.10"
     estimated positional accuracy at epoch of event ["]: 0.04", 0.07"
     remarks:

Data for the event:
 * UT date and time of least geocentric approach: 16:49.7 UT
 * approx. V mag of minor planet at event [mag]: 16.5
 * geocentric parallax of minor planet ["]: 4.444
 * magnitude drop [mag]: 5.4
 * estimated maximum duration [s]: 6.5
 * apparent motion of minor planet ["/h]: 22.55
 * angular distance to moon, phase of moon [deg,%]: 103, 67%
 * remarks:

Elements for WinOccult:
============ cut here ===========================================
 2002 Nov 13
1049 Gotho
16h 49.7m UT
59-00341-1  11.1    5 26 22.105 45  3 41.78TYC 3359-00341-1
16.5     58    6.5   1.979    -1.916      9.85
 -223.453  45.060   -76.33  -18.04
 16.8276   .25615   .52581 -4.56350  2.21848 -0.00301 -0.00204
2000    39.579318920021112.0000038.823259 343.15855615.103437 0.126551263.098345852.7062462912.05   0.15
RATE 1.8072125 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000
============ cut here ===========================================

Calculator(s): Jan Manek









Path coordinates:
                  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  '  "
                                                   Latitude   Latitude
   -157  0  0    52 56  5   16 45 48    48    -9   53 49 15   52  4 35
   -158  0  0    54 27 29   16 46  7    49   -10   55 21 50   53 34 56
   -159  0  0    55 57 36   16 46 25    49   -11   56 53  6   55  4  2
   -160  0  0    57 26 14   16 46 43    50   -12   58 22 51   56 31 40
   -161  0  0    58 53  7   16 47  1    51   -13   59 50 48   57 57 37
   -162  0  0    60 18  4   16 47 19    52   -14   61 16 44   59 21 41
   -163  0  0    61 40 49   16 47 37    52   -14   62 40 23   60 43 39
   -164  0  0    63  1 12   16 47 54    53   -15   64  1 34   62  3 20
   -165  0  0    64 18 60   16 48 11    53   -16   65 20  2   63 20 33
   -166  0  0    65 34  2   16 48 27    53   -16   66 35 36   64 35  7
   -167  0  0    66 46  8   16 48 42    53   -17   67 48  5   65 46 54
   -168  0  0    67 55 13   16 48 57    54   -17   68 57 23   66 55 48
   -169  0  0    69  1  9   16 49 11    54   -18   70  3 21   68  1 42
   -170  0  0    70  3 53   16 49 25    54   -18   71  5 57   69  4 32
   -171  0  0    71  3 23   16 49 38    54   -18   72  5  9   70  4 18
   -172  0  0    71 59 39   16 49 50    54   -19   73  0 57   71  0 59
   -173  0  0    72 52 43   16 50  2    54   -19   73 53 25   71 54 35
   ........................... shortened .............................
     15  0  0    72 27 57   16 56 28    34   -18   73 29 20   71 29  9
     14  0  0    71 32 31   16 56 36    34   -18   72 34 31   70 33  9
     13  0  0    70 33 39   16 56 45    33   -17   71 36  9   69 33 52
     12  0  0    69 31 20   16 56 54    32   -17   70 34  8   68 31 16
     11  0  0    68 25 31   16 57  3    31   -16   69 28 28   67 25 19
     10  0  0    67 16 15   16 57 13    30   -16   68 19 10   66 16  4
      9  0  0    66  3 35   16 57 22    28   -15   67  6 18   65  3 34
      8  0  0    64 47 36   16 57 32    27   -15   65 49 56   63 47 54
      7  0  0    63 28 25   16 57 41    26   -14   64 30 14   62 29 10
      6  0  0    62  6 13   16 57 51    25   -13   63  7 22   61  7 32
      5  0  0    60 41 10   16 58  0    23   -12   61 41 31   59 43 11
      4  0  0    59 13 28   16 58  9    22   -12   60 12 56   58 16 16
      3  0  0    57 43 22   16 58 18    20   -11   58 41 50   56 47  2
      2  0  0    56 11  5   16 58 26    19   -10   57  8 29   55 15 41
      1  0  0    54 36 52   16 58 34    17    -9   55 33  9   53 42 28
      0  0  0    53  0 58   16 58 42    15    -8   53 56  6   52  7 36
   -  1  0  0    51 23 38   16 58 48    14    -7   52 17 35   50 31 21
   -  2  0  0    49 45  8   16 58 54    12    -5   50 37 53   48 53 56
   -  3  0  0    48  5 43   16 58 60    10    -4   48 57 16   47 15 36
   -  4  0  0    46 25 36   16 59  4     8    -3   47 15 57   45 36 34
   -  5  0  0    44 45  2   16 59  8     7    -2   45 34 12   43 57  6
   ........................... 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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