Update for (114) Kassandra - July 12/13, 2002

Jan Manek's update

                    IOTA/IOTA-ES occultation update for
         (114) Kassandra / TYC 6298-02630-1 on July 12/13, 2002
           visible from S Russia, NW Turkey, Greece, Sicily,
                     Tunisia, N Algeria and Morocco


Summary 

In the night of July 12/13, 2002 a faint 11.1 mag star TYC 6298-02630-1 will be occulted by a 103 km asteroid (114) Kassandra. This update is based on USNO/Flagstaff and TMO astrometry for the asteroid and recent UCAC star position.

The updated path shows no shift with time ~0.2 minutes earlier compared to Edwin Goffin's nominal prediction.

Updated path runs over south Russia from northeast to southwest with Volgograd in path ~22:59.8 UT and Rostov on Don just north of path ~23:00.3 UT, NW Turkey ~23:01.4 UT, mid-north Greece around 23:02 UT, Sicily with very south tip of Italy ~23:02.7 UT with Palermo on north limit. Follows Tunisia ~23:03.4 UT, north Algeria around 23:04 UT and north Morocco around 23:05 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: July 12, 2002 @ 23:02 UT
 * magnitude of target star: 11.1
 * magnitude drop [mag]: 1.4
 * estimated maximum duration [s]: 8.1
 * path description: given above
 * Goffin's original chart reference: A02_0708

The occultation path:
 * approximate ground width [km]: 165
 * uncertainty [path widths]: 1.0
 * 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 6298-02630-1
 * constellation: Sagittarius
 * J2000 position [h,m,s; o,',"]: 19h 28m 11.9446s; -15o 43' 15.393"
 * position source: UCAC combined with Tycho-2 proper motion
 * estimated accuracy ["]: 0.02" (0.007", 0.012")
 * V mag [mag]: 11.13
 * B-V [mag]: +1.64
 * remarks:
    Recent UCAC position was provided by Marion and Norbert Zacharias.
    Target star is in north Sagittarius, about 1.6 degrees east of 4.6 mag star upsilon Sagittarii = SAO 162518.
    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 3.0x3.0 degrees
 * limiting magnitude is 12.5
 * labeled stars have indicated SAO numbers
 * remarks:





Data for the minor planet:
 * general information:
     number, name: (114) Kassandra
     approx. diameter [km]: 103
 * orbital information
     orbit source: calculation Manek
     source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
     number of used observations: 94 USNO, 16 TMO
     number of rejected observations: 12 USNO, 1 TMO
     time covered by the observations: 1998 06 23 - 2002 06 24
     rms residuals ["] (RA,DE): 0.07", 0.08"
     estimated positional accuracy at epoch of event ["]: 0.05", 0.07"
     remarks:

Data for the event:
 * UT date and time of least geocentric approach: 23:04.1 UT
 * approx. V mag of minor planet at event [mag]: 12.2
 * geocentric parallax of minor planet ["]: 4.660
 * magnitude drop [mag]: 1.4
 * estimated maximum duration [s]: 8.1
 * apparent motion of minor planet ["/h]: 33.45
 * angular distance to moon, phase of moon [deg,%]: 146, 8%
 * remarks:

Elements for WinOccult:
============ cut here ===========================================
 2002 Jul 12
114 Kassandra
23h  4.1m UT
98-02630-1  11.1   19 28 11.945-15 43 15.39TYC 6298-02630-1
12.2    103    8.1   1.887    -2.261     -7.32
   15.357 -15.718  -164.60   21.89
 23.0683  -.17090   .76176 -7.00315 -1.57082  0.00002 -0.00060
2000    119.4627832002 7 5.00000353.070808164.3958804.936388  0.136198812.677691142.312992788.265   0.15
RATE 2.2493830 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000
============ cut here ===========================================


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  '  "
     64  0  0    55 28 14   22 59  3     9    -3   56 22 54   54 34 51
     62  0  0    54 43  2   22 59  6    10    -4   55 37 37   53 49 42
     60  0  0    53 57 13   22 59 10    11    -6   54 51 43   53  3 59
     58  0  0    53 10 53   22 59 14    13    -7   54  5 15   52 17 46
     56  0  0    52 24  7   22 59 19    14    -8   53 18 20   51 31  9
     54  0  0    51 37  1   22 59 24    15   -10   52 31  3   50 44 13
     52  0  0    50 49 41   22 59 29    17   -11   51 43 30   49 57  5
     50  0  0    50  2 12   22 59 36    18   -12   50 55 48   49  9 49
     48  0  0    49 14 41   22 59 42    19   -14   50  8  2   48 22 32
     46  0  0    48 27 14   22 59 50    21   -15   49 20 18   47 35 20
     44  0  0    47 39 56   22 59 58    22   -16   48 32 44   46 48 18
     42  0  0    46 52 54   23  0  6    23   -18   47 45 24   46  1 33
     40  0  0    46  6 14   23  0 15    25   -19   46 58 25   45 15 10
     38  0  0    45 20  1   23  0 24    26   -20   46 11 53   44 29 15
     36  0  0    44 34 21   23  0 34    27   -21   45 25 53   43 43 53
     34  0  0    43 49 19   23  0 45    28   -22   44 40 32   42 59 10
     32  0  0    43  5  1   23  0 56    30   -24   43 55 54   42 15 11
     30  0  0    42 21 33   23  1  7    31   -25   43 12  5   41 32  2
     28  0  0    41 38 58   23  1 19    32   -26   42 29 10   40 49 46
     26  0  0    40 57 22   23  1 31    33   -27   41 47 14   40  8 28
     24  0  0    40 16 48   23  1 43    34   -28   41  6 21   39 28 13
     22  0  0    39 37 22   23  1 56    35   -28   40 26 36   38 49  6
     20  0  0    38 59  8   23  2  9    35   -29   39 48  2   38 11  9
     18  0  0    38 22  8   23  2 23    36   -30   39 10 44   37 34 26
     16  0  0    37 46 27   23  2 36    37   -30   38 34 45   36 59  2
     14  0  0    37 12  7   23  2 50    37   -31   38  0  8   36 24 59
     12  0  0    36 39 13   23  3  4    38   -31   37 26 57   35 52 21
     10  0  0    36  7 47   23  3 19    38   -32   36 55 15   35 21  9
      8  0  0    35 37 51   23  3 33    38   -32   36 25  4   34 51 28
      6  0  0    35  9 28   23  3 47    38   -32   35 56 26   34 23 18
      4  0  0    34 42 40   23  4  2    39   -33   35 29 25   33 56 43
      2  0  0    34 17 30   23  4 16    39   -33   35  4  2   33 31 45
      0  0  0    33 53 59   23  4 31    38   -32   34 40 19   33  8 26
   -  2  0  0    33 32  9   23  4 45    38   -32   34 18 19   32 46 47
   -  4  0  0    33 12  3   23  4 59    38   -32   33 58  2   32 26 49
   -  6  0  0    32 53 40   23  5 14    37   -32   33 39 30   32  8 36
   -  8  0  0    32 37  3   23  5 28    37   -31   33 22 46   31 52  7
   - 10  0  0    32 22 14   23  5 42    36   -31   33  7 49   31 37 24
   - 12  0  0    32  9 12   23  5 55    36   -30   32 54 41   31 24 28
   - 14  0  0    31 57 60   23  6  9    35   -30   32 43 23   31 13 21
   - 16  0  0    31 48 38   23  6 22    34   -29   32 33 57   31  4  3
   - 18  0  0    31 41  6   23  6 35    33   -28   32 26 22   30 56 35
   - 20  0  0    31 35 26   23  6 48    32   -27   32 20 40   30 50 57
   - 22  0  0    31 31 39   23  7 00    31   -26   32 16 51   30 47 10
   ........................... 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-|
--------------------------------------------------------------------U---U---