Update for (276) Adelheid - November 5/6, 2001

Jan Manek's update

                      IOTA/IOTA-ES occultation update for
            (276) Adelheid / TYC 0106-01402-1 on November 5/6, 2001
               visible from Russia, Caucasus area and Middle East

Summary 

In the night of November 5/6, 2001 a 10.7 mag star TYC 0106-01402-1 will be occulted by a 127 km asteroid (276) Adelheid. This update is based on USNO/Flagstaff and TMO astrometry for the asteroid and Tycho-2 star position.

The updated path shows ~3 path width east shift with time ~0.3 minutes later compared to Edwin Goffin's nominal prediction.

Updated path runs over Russian from north to south ~21:03.5-21:06 UT, Caucasus ~21:06.5 UT, and middle east around 21:08 UT. Please check the path chart for details.

The event at one glimpse:
 * date and approx. UT time of event: November 5, 2001 @ 21:05 UT (Russia)
                                                         21:08 UT (M.E.)
 * magnitude of target star: 10.7
 * magnitude drop [mag]: 2.7
 * estimated maximum duration [s]: 10.4
 * path description: given above
 * Goffin's original chart reference: A01_1123

The occultation path:
 * approximate ground width [km]: 180
 * uncertainty [path widths]: 1.6
 * uncertainty in time [s]: 20
 * map: below
 * remarks: Path uncertainities are given according to nominal star
    position errors and expected asteroid positional accuracy.

Data for the target star:
 * name: TYC 0106-01402-1
 * constellation: Orion
 * J2000 position [h,m,s; o,',"]: 05h 23m 00.818s; +04o 22' 45.01"
 * position source: Tycho-2
 * estimated accuracy ["]: 0.05" (0.04", 0.04")
 * V mag [mag]: 10.73
 * B-V [mag]: +0.18
 * remarks:
     Target star is in middle Orion, only ~2 degree SSW of 1.7 mag star gamma
     Orionis = SAO 112740. Target star is 2.8' NW of similar brightness star
     GSC 0109.1807.

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





Data for the minor planet:
 * general information:
     number, name: (276) Adelheid
     approx. diameter [km]: 127
 * orbital information
     orbit source: calculation Manek
     source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
     number of used observations: 90 USNO, 5 TMO
     number of rejected observations: 5 USNO, 1 TMO
     time covered by the observations: 1998 02 12 - 2001 10 20
     rms residuals ["] (RA,DE): 0.09", 0.09"
     estimated positional accuracy at epoch of event ["]: 0.09", 0.09"
     remarks:

Data for the event:
 * UT date and time of least geocentric approach: 21:08.9 UT
 * approx. V mag of minor planet at event [mag]: 13.3
 * geocentric parallax of minor planet ["]: 4.119
 * magnitude drop [mag]: 2.7
 * estimated maximum duration [s]: 10.4
 * apparent motion of minor planet ["/h]: 28.45
 * angular distance to moon, phase of moon [deg,%]: 28, 78%
 * remarks:

Calculator(s): Jan Manek





Path coordinates:
                                                   Latitude   Latitude
                  Centre               Altitude       Path Limits
  E. Longitude   Latitude      U.T.   star   sun   Limit 1    Limit 2
   ........................... shortened .............................
      o  '  "     o  '  "    h  m  s     o     o    o  '  "    o  '  "
     42 15 44    64  0  0   21  3 51    25   -42   40 21 21   44  7 35
     43 19  4    62  0  0   21  4  2    26   -44   41 33 43   45  2 21
     44  5 13    60  0  0   21  4 14    28   -46   42 27 15   45 41 27
     44 37 34    58  0  0   21  4 26    30   -48   43  5 44   46  7 54
     44 58 34    56  0  0   21  4 39    32   -50   43 31 56   46 23 54
     45 10  6    54  0  0   21  4 53    33   -52   43 47 53   46 31  9
     45 13 32    52  0  0   21  5  7    35   -54   43 55  8   46 30 53
     45  9 57    50  0  0   21  5 22    36   -56   43 54 51   46 24  7
     45  0 13    48  0  0   21  5 37    38   -58   43 47 58   46 11 35
     44 44 59    46  0  0   21  5 53    39   -60   43 35 13   45 53 54
     44 24 46    44  0  0   21  6  9    40   -62   43 17 11   45 31 33
     43 59 59    42  0  0   21  6 25    41   -64   42 54 17   45  4 54
     43 30 56    40  0  0   21  6 42    42   -66   42 26 54   44 34 15
     42 57 54    38  0  0   21  6 59    43   -68   41 55 17   43 59 48
     42 21  2    36  0  0   21  7 17    44   -70   41 19 39   43 21 43
     41 40 29    34  0  0   21  7 35    45   -72   40 40  9   42 40  9
     40 56 20    32  0  0   21  7 54    45   -74   39 56 52   41 55  8
     40  8 37    30  0  0   21  8 13    46   -76   39  9 51   41  6 43
     39 17 20    28  0  0   21  8 32    46   -78   38 19  6   40 14 53
     38 22 27    26  0  0   21  8 51    46   -80   37 24 36   39 19 36
     37 23 53    24  0  0   21  9 11    46   -82   36 26 15   38 20 47
     36 21 30    22  0  0   21  9 30    46   -83   35 23 57   37 18 18
     35 15  9    20  0  0   21  9 50    45   -85   34 17 30   36 12  1
     34  4 36    18  0  0   21 10 10    45   -85   33  6 42   35  1 42
     32 49 37    16  0  0   21 10 30    44   -85   31 51 15   33 47  7
     31 29 49    14  0  0   21 10 51    43   -83   30 30 48   32 27 55
     30  4 50    12  0  0   21 11 11    42   -81   29  4 56   31  3 44
     28 34  7    10  0  0   21 11 31    41   -79   27 33  4   29 34  5
     26 57  2     8  0  0   21 11 52    39   -77   25 54 31   27 58 21
     25 12 48     6  0  0   21 12 12    38   -74   24  8 27   26 15 48
     23 20 23     4  0  0   21 12 32    36   -71   22 13 43   24 25 31
     21 18 29     2  0  0   21 12 53    34   -69   20  8 53   22 26 17
     19  5 18     0  0  0   21 13 13    32   -66   17 51 56   20 16 30
     16 38 25   - 2  0  0   21 13 32    29   -63   15 20  8   17 54  2
     13 54 19   - 4  0  0   21 13 52    26   -59   12 29 19   15 15 49
     10 47 29   - 6  0  0   21 14 11    23   -56    9 12 52   12 17 14
      7  8 35   - 8  0  0   21 14 29    19   -52    5 18 47    8 50 46
      2 38 39   -10  0  0   21 14 47    15   -47    0 20 10    4 42 19
   -  3 36  6   -12  0  0   21 15  3     8   -41 -  7 25 10 -  0 41 48
   ........................... 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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