Update for (205) Martha - June 12/13, 2003

Jan Manek's update

                    IOTA/IOTA-ES occultation update for
             (205) Martha / TYC 5143-02669-1 on June 12/13, 2003
        visible from S India, middle East, Crete, S Italy, Sardinia,
                           NE Spain and S France

Summary 

In the night of June 12/13, 2003 a faint 11.6 mag star TYC 5143-02669-1 will be occulted by a 84 km asteroid (205) Martha. This update is based on USNO/Flagstaff astrometry for the asteroid and UCAC2 star position.

The updated path shows ~8 path width north shift with time ~1.2 minute later compared to Edwin Goffin's nominal prediction.

Updated path runs over S India around 22:00.2 UT, middle East ~22:08 UT, Crete ~22:09.7 UT, grazes S Greece ~22:10.0 UT, follows S Italy and NE Sicily ~22:10.8 UT, Sardinia ~22:11.5 UT and finally NE Spain with Barcelona on south limit and S France with Pic du Midi around 22:12.0 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: June 12, 2003 @ 22:00 UT (India)
                                                      22:11 UT (Europe)
 * magnitude of target star: 11.6
 * magnitude drop [mag]: 2.2
 * estimated maximum duration [s]: 9.9
 * path description: given above
 * Goffin's original chart reference: A03_0620

The occultation path:
 * approximate ground width [km]: 95
 * uncertainty [path widths]: 1.3
 * uncertainty in time [s]: 14
 * 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 5143-02669-1
 * constellation: Aquila
 * J2000 position [h,m,s; o,',"]: 19h 29m 12.5746s; -06o 47' 40.450"
 * position source: recent UCAC2 beta
 * estimated accuracy ["]: 0.03" (0.02", 0.02")
 * V mag [mag]: 11.58
 * B-V [mag]: +0.71
 * remarks:
    Target star is in south Aquila, about 2 degrees west of 5.0 mag star kappa Aquilae = SAO 143600
    or 15' north od 6.4 mag star SAO 143454 = U Aql (a delta Cephei variable).
    !!! 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 3.0x3.0 degrees
 * limiting magnitude is 12.5
 * labeled stars have indicated SAO numbers
 * remarks: Second chart shows 30' blowup to show correctly the star in field.











Data for the minor planet:
 * general information:
     number, name: (205) Martha
     approx. diameter [km]: 84
 * orbital information
     orbit source: calculation Manek
     source of used astrometry: USNO/Flagstaff (Ron Stone)
     number of used observations: 91 USNO
     number of rejected observations: 14 USNO
     time covered by the observations: 1998 04 04 - 2003 05 27
     rms residuals ["] (RA,DE): 0.09", 0.09"
     estimated positional accuracy at epoch of event ["]: 0.08", 0.08"
     remarks:

Data for the event:
 * UT date and time of least geocentric approach: 22:01.5 UT
 * approx. V mag of minor planet at event [mag]: 13.6
 * geocentric parallax of minor planet ["]: 4.633
 * magnitude drop [mag]: 2.2
 * estimated maximum duration [s]: 9.9
 * apparent motion of minor planet ["/h]: 22.28
 * angular distance to moon, phase of moon [deg,%]: 55, 96%
 * remarks:

Elements for WinOccult:
============ cut here ===========================================
 2003 Jun 12
205 Martha
22h  1.5m UT
43-02669-1  11.6   19 29 12.575- 6 47 40.45TYC 5143-02669-1
13.6     84    9.9   1.898    -1.396      8.04
   61.117  -6.796  -150.40   23.17
 22.0246   .15814   .40904 -4.48417  1.73512 -0.00265 -0.00165
2000    261.7712402003 610.00000171.834041212.08113310.692972 0.036698652.777308932.675385439.235   0.15
RATE 2.1294510 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000
============ cut here ===========================================

Calculator(s): Jan Manek












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  '  "
     87  0  0    12  1 37   21 58  4    59   234   -24   12 28 11   11 35  9   13 39 55   10 24 43
     86  0  0    12 20 12   21 58 16    59   233   -25   12 46 48   11 53 41   13 58 39   10 43  9
     85  0  0    12 39  3   21 58 28    60   231   -26   13  5 42   12 12 30   14 17 39   11  1 51
     84  0  0    12 58  9   21 58 41    60   229   -26   13 24 51   12 31 34   14 36 55   11 20 49
     83  0  0    13 17 32   21 58 53    61   228   -27   13 44 16   12 50 54   14 56 27   11 40  3
     82  0  0    13 37  9   21 59  6    61   226   -27   14  3 56   13 10 29   15 16 13   11 59 31
     81  0  0    13 57  2   21 59 18    62   224   -28   14 23 50   13 30 19   15 36 15   12 19 15
     80  0  0    14 17  8   21 59 31    62   222   -29   14 44  0   13 50 23   15 56 31   12 39 13
     79  0  0    14 37 29   21 59 43    63   220   -29   15  4 23   14 10 42   16 17  1   12 59 25
     78  0  0    14 58  4   21 59 56    63   218   -30   15 25  0   14 31 14   16 37 45   13 19 51
     77  0  0    15 18 52   22  0  9    63   216   -30   15 45 50   14 52  0   16 58 42   13 40 30
     76  0  0    15 39 52   22  0 21    63   214   -31   16  6 53   15 12 58   17 19 52   14  1 22
     75  0  0    16  1  5   22  0 34    64   212   -31   16 28  9   15 34  9   17 41 14   14 22 27
     74  0  0    16 22 31   22  0 47    64   209   -31   16 49 36   15 55 31   18  2 48   14 43 44
     73  0  0    16 44  7   22  0 59    64   207   -32   17 11 15   16 17  6   18 24 33   15  5 12
     72  0  0    17  5 55   22  1 12    64   205   -32   17 33  6   16 38 51   18 46 30   15 26 51
     71  0  0    17 27 54   22  1 25    64   203   -33   17 55  6   17  0 48   19  8 37   15 48 42
     70  0  0    17 50  2   22  1 38    64   200   -33   18 17 17   17 22 54   19 30 54   16 10 42
    ...................................... shortened .............................................
     41  0  0    29  8 38   22  7 20    50   150   -36   29 36 31   28 40 51   30 51 56   27 26 59
     40  0  0    29 31 56   22  7 31    49   149   -36   29 59 50   29  4  9   31 15 14   27 50 17
     39  0  0    29 55  8   22  7 41    48   148   -36   30 23  2   29 27 21   31 38 26   28 13 29
     38  0  0    30 18 14   22  7 51    48   147   -36   30 46  8   29 50 27   32  1 32   28 36 36
     37  0  0    30 41 13   22  8  0    47   146   -36   31  9  7   30 13 27   32 24 30   28 59 35
     36  0  0    31  4  5   22  8 10    46   145   -35   31 31 58   30 36 19   32 47 21   29 22 28
     35  0  0    31 26 49   22  8 19    45   144   -35   31 54 42   30 59  3   33 10  4   29 45 14
     34  0  0    31 49 25   22  8 28    44   143   -35   32 17 18   31 21 40   33 32 38   30  7 52
     33  0  0    32 11 53   22  8 38    44   142   -35   32 39 44   31 44  8   33 55  3   30 30 22
     32  0  0    32 34 11   22  8 46    43   141   -34   33  2  2   32  6 27   34 17 19   30 52 42
     31  0  0    32 56 20   22  8 55    42   141   -34   33 24 10   32 28 37   34 39 25   31 14 54
     30  0  0    33 18 19   22  9  4    41   140   -34   33 46  8   32 50 36   35  1 20   31 36 56
     29  0  0    33 40  7   22  9 12    41   139   -33   34  7 56   33 12 26   35 23  5   31 58 48
     28  0  0    34  1 45   22  9 20    40   138   -33   34 29 32   33 34  5   35 44 39   32 20 30
     27  0  0    34 23 12   22  9 28    39   137   -33   34 50 58   33 55 33   36  6  1   32 42  1
     26  0  0    34 44 27   22  9 36    38   136   -32   35 12 12   34 16 49   36 27 11   33  3 20
     25  0  0    35  5 30   22  9 44    37   136   -32   35 33 14   34 37 53   36 48  9   33 24 28
     24  0  0    35 26 21   22  9 52    36   135   -31   35 54  3   34 58 46   37  8 55   33 45 24
     23  0  0    35 46 59   22  9 59    36   134   -31   36 14 40   35 19 26   37 29 27   34  6  8
     22  0  0    36  7 25   22 10  6    35   133   -31   36 35  4   35 39 53   37 49 47   34 26 39
     21  0  0    36 27 37   22 10 13    34   132   -30   36 55 14   36  0  6   38  9 53   34 46 57
     20  0  0    36 47 35   22 10 20    33   132   -30   37 15 11   36 20  7   38 29 44   35  7  2
     19  0  0    37  7 20   22 10 27    32   131   -29   37 34 54   36 39 53   38 49 22   35 26 53
     18  0  0    37 26 50   22 10 33    32   130   -29   37 54 22   36 59 26   39  8 45   35 46 31
     17  0  0    37 46  6   22 10 40    31   129   -28   38 13 36   37 18 44   39 27 54   36  5 54
     16  0  0    38  5  8   22 10 46    30   129   -28   38 32 36   37 37 47   39 46 48   36 25  3
     15  0  0    38 23 54   22 10 52    29   128   -28   38 51 20   37 56 35   40  5 26   36 43 56
     14  0  0    38 42 25   22 10 57    28   127   -27   39  9 49   38 15  9   40 23 49   37  2 35
     13  0  0    39  0 41   22 11  3    28   126   -27   39 28  2   38 33 27   40 41 56   37 20 59
     12  0  0    39 18 41   22 11  8    27   126   -26   39 46  0   38 51 29   40 59 48   37 39  7
     11  0  0    39 36 25   22 11 14    26   125   -26   40  3 42   39  9 15   41 17 23   37 57  0
     10  0  0    39 53 53   22 11 19    25   124   -25   40 21  8   39 26 46   41 34 42   38 14 37
      9  0  0    40 11  5   22 11 24    25   124   -25   40 38 17   39 44  0   41 51 45   38 31 57
      8  0  0    40 28  1   22 11 28    24   123   -24   40 55 10   40  0 58   42  8 31   38 49  2
      7  0  0    40 44 40   22 11 33    23   122   -24   41 11 46   40 17 40   42 25  0   39  5 49
      6  0  0    41  1  2   22 11 37    22   121   -23   41 28  6   40 34  4   42 41 13   39 22 21
      5  0  0    41 17  7   22 11 42    21   121   -23   41 44  9   40 50 12   42 57  9   39 38 35
      4  0  0    41 32 55   22 11 46    21   120   -22   41 59 54   41  6  3   43 12 47   39 54 33
      3  0  0    41 48 27   22 11 50    20   119   -21   42 15 23   41 21 37   43 28  8   40 10 13
      2  0  0    42  3 40   22 11 54    19   119   -21   42 30 34   41 36 53   43 43 12   40 25 37
      1  0  0    42 18 37   22 11 57    18   118   -20   42 45 28   41 51 52   43 57 59   40 40 43
      0  0  0    42 33 16   22 12  1    18   117   -20   43  0  4   42  6 34   44 12 28   40 55 32
   -  1  0  0    42 47 38   22 12  4    17   117   -19   43 14 23   42 20 59   44 26 39   41 10  3
   -  2  0  0    43  1 42   22 12  7    16   116   -19   43 28 25   42 35  5   44 40 33   41 24 17
   -  3  0  0    43 15 28   22 12 10    15   115   -18   43 42  8   42 48 54   44 54  9   41 38 13
   -  4  0  0    43 28 56   22 12 13    15   114   -18   43 55 34   43  2 25   45  7 27   41 51 51
   -  5  0  0    43 42  7   22 12 16    14   114   -17   44  8 42   43 15 39   45 20 28   42  5 11
   -  6  0  0    43 55  0   22 12 18    13   113   -17   44 21 32   43 28 34   45 33 11   42 18 14
   -  7  0  0    44  7 35   22 12 20    12   112   -16   44 34  4   43 41 12   45 45 35   42 30 59
   -  8  0  0    44 19 52   22 12 23    12   112   -15   44 46 19   43 53 32   45 57 42   42 43 25
   -  9  0  0    44 31 51   22 12 25    11   111   -15   44 58 15   44  5 33   46  9 31   42 55 34
   - 10  0  0    44 43 32   22 12 27    10   110   -14   45  9 53   44 17 17   46 21  3   43  7 24
   - 11  0  0    44 54 55   22 12 29     9   110   -14   45 21 14   44 28 43   46 32 16   43 18 57
   - 12  0  0    45  6  0   22 12 30     9   109   -13   45 32 16   44 39 50   46 43 11   43 30 11
   - 13  0  0    45 16 47   22 12 32     8   108   -13   45 43  0   44 50 40   46 53 48   43 41  7
   - 14  0  0    45 27 16   22 12 33     7   107   -12   45 53 27   45  1 11   47  4  7   43 51 45
   - 15  0  0    45 37 27   22 12 34     7   107   -12   46  3 35   45 11 24   47 14  9   44  2  5
   - 16  0  0    45 47 19   22 12 36     6   106   -11   46 13 25   45 21 19   47 23 52   44 12  6
   - 17  0  0    45 56 54   22 12 36     5   105   -10   46 22 57   45 30 56   47 33 18   44 21 50
   - 18  0  0    46  6 10   22 12 37     4   105   -10   46 32 11   45 40 15   47 42 25   44 31 15
   - 19  0  0    46 15  9   22 12 38     4   104    -9   46 41  7   45 49 16   47 51 15   44 40 21
    ...................................... 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---