Update for (233) Asterope - November 15/16, 2002 - South Africa

Jan Manek's update

                    IOTA/IOTA-ES occultation update for
           (233) Asterope / TYC 1315-00693-1 on November 15/16, 2002
                         visible from middle Africa

Summary 

In the night of November 15/16, 2002 an 11.5 mag star TYC 1315-00693-1 will be occulted by a 108 km asteroid (233) Asterope. This update is based on USNO/Flagstaff and TMO astrometry for the asteroid and recent UCAC star position.

The updated path shows ~6 path width north shift with time ~1.6 minutes later compared to Edwin Goffin's nominal prediction.

Updated path runs over mid-south Africa, probably without any observer. 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 16, 2002 @ 02:28 UT
 * magnitude of target star: 11.5
 * magnitude drop [mag]: 1.3
 * estimated maximum duration [s]: 15.7
 * path description: given above
 * Goffin's original chart reference: A02_1113

The occultation path:
 * approximate ground width [km]: 135
 * uncertainty [path widths]: 1.3
 * uncertainty in time [s]: 18
 * 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 1315-00693-1
 * constellation: Orion
 * J2000 position [h,m,s; o,',"]: 06h 17m 44.5196s; +16o 30' 45.710"
 * position source: recent UCAC position combined with derived proper motion
 * estimated accuracy ["]: 0.03" (0.02", 0.02")
 * V mag [mag]: 11.49
 * B-V [mag]: +2.02
 * remarks:
    Recent UCAC position was provided by Marion and Norbert Zacharias.
    Target star is in north Orion, about 4.8 degrees west of 2.0 mag star gamma Geminorum = SAO 95912.
    Very close to border with Orion.
    !!! 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 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: (233) Asterope
     approx. diameter [km]: 108
 * orbital information
     orbit source: calculation Manek
     source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
     number of used observations: 120 USNO, 30 TMO
     number of rejected observations: 9 USNO, 2 TMO
     time covered by the observations: 1993 11 17 - 2002 11 05
     rms residuals ["] (RA,DE): 0.09", 0.07"
     estimated positional accuracy at epoch of event ["]: 0.08", 0.09"
     remarks:

Data for the event:
 * UT date and time of least geocentric approach: 02:28.3 UT
 * approx. V mag of minor planet at event [mag]: 12.4
 * geocentric parallax of minor planet ["]: 4.824
 * magnitude drop [mag]: 1.3
 * estimated maximum duration [s]: 15.7
 * apparent motion of minor planet ["/h]: 18.79
 * angular distance to moon, phase of moon [deg,%]: 84, 86%
 * remarks:

Elements for WinOccult:
============ cut here ===========================================
 2002 Nov 16
233 Asterope
 2h 28.3m UT
15-00693-1  11.5    6 17 44.520 16 30 45.71TYC 1315-00693-1
12.4    108   15.7   1.823    -1.132     -9.41
    2.365  16.515   139.11  -18.66
  2.4714   .28557  -.49175 -3.37061 -1.95170 -0.00376  0.00065
2000    80.806666520021112.00000124.886266222.3025637.664820  0.099796982.660173872.394696568.215   0.15
RATE 2.2716375 .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
     44  0  0   - 4  7 59    2 21 57    45    -5  - 3 31 24  - 4 44 50
     42  0  0   - 4 41 42    2 22 25    47    -7  - 4  4 55  - 5 18 45
     40  0  0   - 5 17 56    2 22 53    48    -8  - 4 40 56  - 5 55 13
     38  0  0   - 5 56 41    2 23 22    49   -10  - 5 19 26  - 6 34 12
     36  0  0   - 6 37 56    2 23 52    50   -11  - 6  0 26  - 7 15 43
     34  0  0   - 7 21 40    2 24 23    51   -13  - 6 43 54  - 7 59 43
     32  0  0   - 8  7 52    2 24 54    52   -14  - 7 29 50  - 8 46 13
     30  0  0   - 8 56 31    2 25 25    53   -16  - 8 18 11  - 9 35 10
     28  0  0   - 9 47 35    2 25 57    54   -17  - 9  8 56  -10 26 34
     26  0  0   -10 41  3    2 26 29    54   -18  -10  2  5  -11 20 22
     24  0  0   -11 36 53    2 27  2    55   -20  -10 57 34  -12 16 33
     22  0  0   -12 35  2    2 27 35    55   -21  -11 55 21  -13 15  4
     20  0  0   -13 35 27    2 28  9    55   -22  -12 55 24  -14 15 52
     18  0  0   -14 38  6    2 28 42    55   -23  -13 57 40  -15 18 54
     16  0  0   -15 42 54    2 29 16    55   -24  -15  2  5  -16 24  7
     14  0  0   -16 49 49    2 29 50    55   -25  -16  8 35  -17 31 26
     12  0  0   -17 58 44    2 30 23    54   -26  -17 17  6  -18 40 48
     10  0  0   -19  9 36    2 30 57    54   -27  -18 27 33  -19 52  6
      8  0  0   -20 22 18    2 31 30    53   -28  -19 39 49  -21  5 14
      6  0  0   -21 36 44    2 32  3    52   -28  -20 53 49  -22 20  7
   ........................... 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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