Update for (479) Caprera - November 30/December 1, 2000

Jan Manek's update

                    IOTA/IOTA-ES occultation update for
      (479) Caprera / TYC 0741-00076-1 on Nov 30/December 1, 2000
       visible from very N Russia/Finland/Sweden/Norway/Greenland

Summary 

In the night of November 30/December 1, 2000 a 9.7 mag star TYC 0741-00076-1 will be occulted by a 78 km asteroid (479) Caprera. This update is based on USNO/Flagstaff and TMO astrometry for the asteroid and Tycho-2 star position.

The updated path shows ~4 path width north shift and time ~0.8 minutes later compared to Edwin Goffin's nominal prediction.

The path of this occultation runs over very N Russia ~3:59 UT and then grazes N coast of Finland, Sweden and Norway around 4:00 UT. Later also N parts of Greenland is in path and some islands in north Canada. Most likely there are no potential observers there.

The event at one glimpse:
 * date and approx. UT time of event: December 1, 2000 @ 04:00 UT (Euro)
 * magnitude of target star: 9.7
 * magnitude drop [mag]: 3.1
 * estimated maximum duration [s]: 12.9
 * path description: given above
 * Goffin's original chart reference: A00_1229

The occultation path:
 * approximate ground width [km]: 210
 * uncertainty [path widths]: 1.5
 * uncertainty in time [s]: 20
 * map: below
 * remarks: Path uncertainities are given according to nominal star
    position errors and expected asteroid positional accuracy.
    !!!!!!!
    Circles along path indicates the centerline for this event.
    They are more accurate than the path limit lines.
    !!!!!!!

Data for the target star:
 * name: TYC 0741-00076-1
 * constellation: Monoceros
 * J2000 position [h,m,s; o,',"]: 06h 35m 15.106s; +11o 50' 08.81"
 * position source: Tycho-2
 * estimated accuracy ["]: 0.04" (0.03", 0.03")
 * V mag [mag]: 9.70
 * B-V [mag]: +0.47
 * remarks: 
     Target star is in north Monoceros, on board with Gemini, about 4.6
     degrees south of 2.0 mag star gamma Geminorum = SAO 95912.

Close finding chart (prepared in GUIDE7):
 * occulted star is in center - labeled with cross
 * field is 2.5x2.5 degrees
 * limiting magnitude is 12.5
 * labeled stars have indicated SAO numbers





Data for the minor planet:
 * general information:
     number, name: (479) Caprera
     approx. diameter [km]: 78
 * orbital information
     orbit source: calculation Manek
     source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
     number of used observations: 43 USNO, 9 TMO
     number of rejected observations: 2 USNO, 1 TMO
     time covered by the observations: 1998 02 26 - 2000 11 20
     rms residuals ["] (RA,DE): 0.09", 0.09"
     estimated positional accuracy at epoch of event ["]: 0.10"
     remarks: 

Data for the event:
 * UT date and time of least geocentric approach: 04:04.0 UT
 * approx. V mag of minor planet at event [mag]: 12.7
 * geocentric parallax of minor planet ["]: 6.708
 * magnitude drop [mag]: 3.1
 * estimated maximum duration [s]: 12.9
 * apparent motion of minor planet ["/h]: 22.91
 * angular distance to moon, phase of moon [deg,%]: 150, 23%
 * remarks: 

Calculator(s): Jan Manek





Path coordinates:
                                       Altitude
  E. Longitude    Latitude     U.T.    star  sun
   ........ shortened ..........................
      o  '  "     o  '  "    h  m  s     o     o
     60  0  0    64  0  8    3 58 10    10    -7
     55  0  0    65 22 50    3 58 34    12    -9
     50  0  0    66 45 60    3 59  1    14   -12
     45  0  0    68  8 28    3 59 31    16   -14
     40  0  0    69 29 10    4  0  3    17   -16
     35  0  0    70 47  7    4  0 35    19   -18
     30  0  0    72  1 26    4  1  7    20   -20
     25  0  0    73 11 26    4  1 38    21   -21
     20  0  0    74 16 35    4  2  9    21   -23
     15  0  0    75 16 33    4  2 38    22   -24
     10  0  0    76 11 12    4  3  5    22   -25
      5  0  0    77  0 32    4  3 31    22   -26
      0  0  0    77 44 42    4  3 55    22   -27
   -  5  0  0    78 23 55    4  4 17    22   -27
   - 10  0  0    78 58 28    4  4 38    22   -28
   - 15  0  0    79 28 42    4  4 57    22   -28
   - 20  0  0    79 54 54    4  5 15    22   -29
   - 25  0  0    80 17 24    4  5 31    21   -29
   - 30  0  0    80 36 30    4  5 47    21   -29
   - 35  0  0    80 52 26    4  6  2    21   -30
   - 40  0  0    81  5 25    4  6 16    21   -30
   - 45  0  0    81 15 40    4  6 29    20   -30
   - 50  0  0    81 23 19    4  6 42    20   -30
   - 55  0  0    81 28 28    4  6 55    20   -30
   - 60  0  0    81 31 13    4  7  7    19   -30
   - 65  0  0    81 31 35    4  7 18    19   -30
   - 70  0  0    81 29 34    4  7 30    19   -30
   - 75  0  0    81 25 10    4  7 41    18   -30
   - 80  0  0    81 18 17    4  7 53    18   -30
   - 85  0  0    81  8 49    4  8  4    17   -30
   - 90  0  0    80 56 39    4  8 16    17   -30
   - 95  0  0    80 41 35    4  8 27    16   -30
   -100  0  0    80 23 24    4  8 39    16   -30
   -105  0  0    80  1 51    4  8 51    15   -29
   -110  0  0    79 36 37    4  9  3    14   -29
   -115  0  0    79  7 25    4  9 15    13   -28
   -120  0  0    78 33 52    4  9 27    12   -28
   -125  0  0    77 55 37    4  9 39    11   -27
   -130  0  0    77 12 21    4  9 50    10   -27
   -135  0  0    76 23 46    4 10  2     9   -26
   ........ 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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