Update for (977) Philippa - October 25/26, 2002 - Africa

Jan Manek's update

                    IOTA/IOTA-ES occultation update for
        (977) Philippa / TYC 1309-00799-1 on October 25/26, 2002
                          visible from Africa


Summary 

In the night of October 25/26, 2002 a 11.7 mag star TYC 1309-00799-1 will be occulted by a 67 km asteroid (977) Philippa. This update is based on USNO/Flagstaff and TMO astrometry for the asteroid and recent UCAC star position.

The updated path shows ~6 path widths north shift with time ~1.3 minutes earlier compared to Edwin Goffin's nominal prediction.

Updated path runs over Africa from SE to NW. Unfortunately not over no any area with observers. Please check the path chart for details.

Clear sky and good luck !!!

The event at one glimpse:
 * date and approx. UT time of event: October 26, 2002 @ 00:43 UT (South Africa)
 * magnitude of target star: 11.7
 * magnitude drop [mag]: 3.3
 * estimated maximum duration [s]: 14.1
 * path description: given above
 * Goffin's original chart reference: A02_1051

The occultation path:
 * approximate ground width [km]: 80
 * uncertainty [path widths]: 2.5
 * uncertainty in time [s]: 30
 * 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 1309-00799-1
 * constellation: Taurus
 * J2000 position [h,m,s; o,',"]: 05h 35m 07.9245s; +21o 04' 09.470"
 * position source: Recent UCAC position combined with Tycho-2 proper motion
 * estimated accuracy ["]: 0.02" (0.01", 0.02")
 * V mag [mag]: 11.74
 * B-V [mag]: +0.22
 * remarks:
    Target star is in east Taurus, only 36 minutes west of 3.0 mag star zeta Tauri = SAO 77336
    or about 1 degree south of supernova remnant M1.
    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.

Close finding chart (prepared in GUIDE7):
 * occulted star is in center - labeled with cross
 * field is 2.0x2.0 degrees
 * limiting magnitude is 13.0
 * labeled stars have indicated SAO numbers
 * remarks: Second chart is 30'x30' to show better the crowded field.








Data for the minor planet:
 * general information:
     number, name: (977) Philippa
     approx. diameter [km]: 67
 * orbital information
     orbit source: calculation Manek
     source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
     number of used observations: 80 USNO, 8 TMO
     number of rejected observations: 118 USNO
     time covered by the observations: 1998 02 17 - 2002 10 10
     rms residuals ["] (RA,DE): 0.13", 0.14"
     estimated positional accuracy at epoch of event ["]: 0.05", 0.08"
     remarks:

Data for the event:
 * UT date and time of least geocentric approach: 00:46.6 UT
 * approx. V mag of minor planet at event [mag]: 14.9
 * geocentric parallax of minor planet ["]: 3.654
 * magnitude drop [mag]: 3.3
 * estimated maximum duration [s]: 14.1
 * apparent motion of minor planet ["/h]: 9.79
 * angular distance to moon, phase of moon [deg,%]: 4, 81%
 * remarks:

Elements for WinOccult:
============ cut here ===========================================
 2002 Oct 26
977 Philippa
 0h 46.6m UT
09-00799-1  11.7    5 35  7.925 21  4  9.47TYC 1309-00799-1
14.9     67   14.1   2.407    -0.474      7.22
   37.904  21.067   164.37  -12.32
  0.7766  -.37637  -.34493 -1.80925  1.97501 -0.00464 -0.00006
2000    267.73276620021023.0000088.477521 76.077954 15.201349 0.029458963.115245893.023473989.675   0.15
RATE 1.7925260 .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 .............................
                                                   Latitude   Latitude
      o  '  "     o  '  "    h  m  s     o     o    o  '  "    o  '  "
     39  0  0   -25 32 57    0 35  4    43   -27  -24 55 42  -26 10 41
     37  0  0   -23  0 25    0 36  1    46   -30  -22 24 18  -23 36 57
     35  0  0   -20 31 52    0 37  0    48   -32  -19 56 50  -21  7 17
     33  0  0   -18  7 37    0 38  0    50   -35  -17 33 36  -18 41 59
     31  0  0   -15 47 52    0 39  1    52   -38  -15 14 49  -16 21 14
     29  0  0   -13 32 47    0 40  2    54   -40  -13  0 38  -14  5 14
     27  0  0   -11 22 28    0 41  3    55   -43  -10 51 10  -11 54  3
     25  0  0   - 9 16 60    0 42  5    57   -45  - 8 46 30  - 9 47 45
     23  0  0   - 7 16 23    0 43  5    58   -48  - 6 46 38  - 7 46 22
     21  0  0   - 5 20 39    0 44  5    58   -50  - 4 51 35  - 5 49 55
     19  0  0   - 3 29 45    0 45  4    59   -52  - 3  1 20  - 3 58 20
     17  0  0   - 1 43 39    0 46  2    59   -55  - 1 15 51  - 2 11 37
     15  0  0   - 0  2 18    0 46 59    59   -57    0 24 55  - 0 29 41
     13  0  0     1 34 21    0 47 55    59   -59    2  1  1    1  7 31
     11  0  0     3  6 23    0 48 50    59   -62    3 32 34    2 40  4
      9  0  0     4 33 54    0 49 43    58   -64    4 59 36    4  8  4
      7  0  0     5 56 57    0 50 35    57   -66    6 22 12    5 31 34
      5  0  0     7 15 39    0 51 25    56   -68    7 40 29    6 50 42
      3  0  0     8 30  5    0 52 14    55   -70    8 54 32    8  5 31
      1  0  0     9 40 20    0 53  1    54   -72   10  4 25    9 16  8
   -  1  0  0    10 46 29    0 53 47    53   -74   11 10 14   10 22 38
   -  3  0  0    11 48 39    0 54 31    52   -76   12 12  4   11 25  7
   -  5  0  0    12 46 53    0 55 14    50   -77   13 10  1   12 23 39
   -  7  0  0    13 41 17    0 55 56    49   -79   14  4  9   13 18 20
   -  9  0  0    14 31 56    0 56 35    47   -81   14 54 32   14  9 14
   - 11  0  0    15 18 54    0 57 14    46   -82   15 41 16   14 56 26
   - 13  0  0    16  2 15    0 57 51    44   -83   16 24 25   15 40  0
   - 15  0  0    16 42  4    0 58 26    43   -84   17  4  2   16 20  1
   - 17  0  0    17 18 24    0 59  0    41   -85   17 40 12   16 56 31
   - 19  0  0    17 51 18    0 59 33    39   -84   18 12 56   17 29 34
   - 21  0  0    18 20 49    1  0  5    38   -84   18 42 19   17 59 14
   - 23  0  0    18 46 59    1  0 35    36   -82   19  8 22   18 25 32
   - 25  0  0    19  9 51    1  1  3    35   -81   19 31  8   18 48 30
   - 27  0  0    19 29 27    1  1 31    33   -80   19 50 39   19  8 11
   - 29  0  0    19 45 48    1  1 57    31   -78   20  6 55   19 24 35
   - 31  0  0    19 58 54    1  2 22    30   -77   20 19 58   19 37 44
   - 33  0  0    20  8 46    1  2 45    28   -75   20 29 48   19 47 38
   - 35  0  0    20 15 23    1  3  7    26   -73   20 36 25   19 54 17
   - 37  0  0    20 18 46    1  3 28    24   -72   20 39 49   19 57 40
   - 39  0  0    20 18 54    1  3 48    23   -70   20 39 57   19 57 45
   - 41  0  0    20 15 44    1  4  6    21   -68   20 36 50   19 54 33
   - 43  0  0    20  9 14    1  4 23    19   -67   20 30 24   19 47 59
   - 45  0  0    19 59 21    1  4 39    17   -65   20 20 36   19 38  1
   - 47  0  0    19 46  3    1  4 53    16   -63   20  7 24   19 24 36
   - 49  0  0    19 29 14    1  5  6    14   -61   19 50 43   19  7 40
   - 51  0  0    19  8 51    1  5 17    12   -60   19 30 29   18 47  8
   ........................... 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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