Update for (143) Adria - April 17/18, 2003

Jan Manek's update

                    IOTA/IOTA-ES occultation update for
           (143) Adria / TYC 1906-01547-1 on April 17/18, 2003
         visible from N Portugal, Spain from NW to SE and Algeria

Summary 

In the night of April 17/18, 2003 a faint 12.0 mag star TYC 1906-01547-1 will be occulted by a 93 km asteroid (143) Adria. This update is based on USNO/Flagstaff and TMO astrometry for the asteroid and recent UCAC star position.

The updated path shows ~0.5 path width south shift with time 0.2 minutes earlier compared to Edwin Goffin's nominal prediction.

Updated path runs over north Portugal ~22:59.4 UT just north of Porto, Spain from NW to SE around 22:59.6 UT with Madrid north of path and finally Algeria around 22:59.8 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: April 17, 2003 @ 22:59 UT (Europe)
 * magnitude of target star: 12.0
 * magnitude drop [mag]: 2.7
 * estimated maximum duration [s]: 3.9
 * path description: given above
 * Goffin's original chart reference: A03_0421

The occultation path:
 * approximate ground width [km]: 145
 * uncertainty [path widths]: 1.2
 * uncertainty in time [s]: 4
 * 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 1906-01547-1
 * constellation: Gemini
 * J2000 position [h,m,s; o,',"]: 06h 53m 57.3734s; +28o 39' 08.131"
 * position source: recent UCAC position combined with derived proper motion
 * estimated accuracy ["]: 0.03" (0.02", 0.03")
 * V mag [mag]: 11.99
 * B-V [mag]: +0.13
 * remarks:
    Recent UCAC position was provided by Marion and Norbert Zacharias.
    Target star is in northwest Gemini, about 4.2 degrres NE of 3.0 mag star epsilon Geminorum = SAO 78682.
    !!! 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 is 30' blowup to show correctly the target star in the field.











Data for the minor planet:
 * general information:
     number, name: (143) Adria
     approx. diameter [km]: 93
 * orbital information
     orbit source: calculation Manek
     source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
     number of used observations: 111 USNO, 16 TMO
     number of rejected observations: 23 USNO
     time covered by the observations: 1997 11 09 - 2003 03 11
     rms residuals ["] (RA,DE): 0.08", 0.11"
     estimated positional accuracy at epoch of event ["]: 0.04", 0.04"
     remarks:

Data for the event:
 * UT date and time of least geocentric approach: 22:57.0 UT
 * approx. V mag of minor planet at event [mag]: 14.6
 * geocentric parallax of minor planet ["]: 3.047
 * magnitude drop [mag]: 2.7
 * estimated maximum duration [s]: 3.9
 * apparent motion of minor planet ["/h]: 41.47
 * angular distance to moon, phase of moon [deg,%]: 122, 98%
 * remarks:

Elements for WinOccult:
============ cut here ===========================================
 2003 Apr 17
   143 Adria
22h 57.0m UT
  12.0    6 53 57.373 28 39  8.13TYC 1906-01547-1
14.6     93    3.9   2.886     2.996    -12.85
  -86.423  28.656  -164.36   10.59
 22.9503   .22265   .68358 12.94124 -4.21746  0.00545 -0.00036
2000    264.5577022003 411.00000250.561906333.25198211.473146 0.071654112.763069892.565084589.115   0.15
RATE 2.1459340 .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  '  "
   - 16  0  0    48 45 45   22 58 53    33   277   -25   47 49  0   49 44  3   45 42 39   52  6 13
   - 15  0  0    47 57  9   22 58 57    33   278   -26   47  0 47   48 55  2   44 55 14   51 16  5
   - 14  0  0    47  8 24   22 59  0    32   279   -27   46 12 27   48  5 51   44  7 43   50 25 44
   - 13  0  0    46 19 33   22 59  4    31   281   -28   45 24  0   47 16 33   43 20  8   49 35 15
   - 12  0  0    45 30 39   22 59  8    30   282   -29   44 35 32   46 27 12   42 32 32   48 44 39
   - 11  0  0    44 41 44   22 59 11    29   283   -30   43 47  4   45 37 49   41 44 58   47 54  1
   - 10  0  0    43 52 53   22 59 15    28   284   -31   42 58 39   44 48 28   40 57 29   47  3 24
   -  9  0  0    43  4  7   22 59 18    27   285   -32   42 10 20   43 59 13   40 10  6   46 12 52
   -  8  0  0    42 15 29   22 59 22    26   286   -33   41 22 10   43 10  6   39 22 54   45 22 27
   -  7  0  0    41 27  3   22 59 25    25   287   -34   40 34 11   42 21 10   38 35 53   44 32 12
   -  6  0  0    40 38 51   22 59 28    25   288   -35   39 46 27   41 32 28   37 49  7   43 42 11
   -  5  0  0    39 50 55   22 59 31    24   289   -36   38 58 59   40 44  2   37  2 38   42 52 27
   -  4  0  0    39  3 18   22 59 34    23   289   -37   38 11 50   39 55 55   36 16 28   42  3  1
   -  3  0  0    38 16  2   22 59 37    22   290   -38   37 25  2   39  8  9   35 30 39   41 13 57
   -  2  0  0    37 29 10   22 59 39    21   291   -39   36 38 38   38 20 47   34 45 14   40 25 17
   -  1  0  0    36 42 43   22 59 42    19   292   -40   35 52 39   37 33 51   34  0 14   39 37  4
      0  0  0    35 56 45   22 59 44    18   292   -41   35  7  8   36 47 23   33 15 41   38 49 20
      1  0  0    35 11 15   22 59 47    17   293   -42   34 22  7   36  1 25   32 31 37   38  2  6
      2  0  0    34 26 18   22 59 49    16   294   -43   33 37 36   35 15 58   31 48  4   37 15 25
      3  0  0    33 41 53   22 59 51    15   295   -44   32 53 39   34 31  5   31  5  3   36 29 19
      4  0  0    32 58  4   22 59 53    14   295   -45   32 10 15   33 46 48   30 22 36   35 43 49
      5  0  0    32 14 50   22 59 54    13   296   -46   31 27 28   33  3  7   29 40 44   34 58 58
      6  0  0    31 32 15   22 59 56    12   296   -47   30 45 18   32 20  4   28 59 29   34 14 45
      7  0  0    30 50 18   22 59 58    11   297   -48   30  3 47   31 37 41   28 18 51   33 31 14
      8  0  0    30  9  1   22 59 59    10   297   -49   29 22 55   30 55 58   27 38 52   32 48 24
      9  0  0    29 28 26   23  0  0     9   298   -50   28 42 44   30 14 57   26 59 33   32  6 18
     10  0  0    28 48 33   23  0  1     8   298   -50   28  3 15   29 34 39   26 20 55   31 24 56
     11  0  0    28  9 24   23  0  2     7   299   -51   27 24 28   28 55  5   25 42 59   30 44 20
     12  0  0    27 30 58   23  0  3     6   299   -52   26 46 26   28 16 15   25  5 45   30  4 29
   ........................................ 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---