Update for (582) Olympia - December 10/11, 2002

Jan Manek's update

                    IOTA/IOTA-ES occultation update for
            (582) Olympia / TAC -14 03311 on December 10/11, 2002
                      visible from Russia and Kazachstan

Summary 

In the night of December 10/11, 2002 a faint 11.4 mag star TAC -14 03311 will be occulted by a 47 km asteroid (582) Olympia. This update is based on USNO/Flagstaff astrometry for the asteroid and TAC star position.

The updated path shows ~12 path width north shift with time 1.3 minutes earlier compared to Edwin Goffin's nominal prediction.

Updated path runs over Russia from NW to SE from 0:36 -> 0:42 UT with Sverdlovsk in path ~0:40.4 UT. Later path runs over north Kazachstan, close to border with Russia 0:42 -> 0:48 UT with Omsk just north of path. I have estimated and given 0.1" uncertainty for the star position as I don't have at this moment the original TAC to look for star's catalogue error. Please check the path chart for details.

Clear sky and good luck !!!

The event at one glimpse:
 * date and approx. UT time of event: December 11, 2002 @ 00:40 UT (Russia)
 * magnitude of target star: 11.4
 * magnitude drop [mag]: 1.5
 * estimated maximum duration [s]: 10.9
 * path description: given above
 * Goffin's original chart reference: A02_1253

The occultation path:
 * approximate ground width [km]: 140
 * uncertainty [path widths]: 4.2
 * uncertainty in time [s]: 37
 * map: below
 * remarks: Path uncertainties are given according to nominal star
    position errors and expected asteroid positional accuracy.

Data for the target star:
 * name: TAC -14 03311
 * constellation: Hydra
 * J2000 position [h,m,s; o,',"]: 09h 06m 04.597 s; -14o 08' 46.65 "
 * position source: TAC 1.0
 * estimated accuracy ["]: 0.14" (0.1", 0.1")
 * V mag [mag]: 11.43
 * B-V [mag]: +0.90
 * remarks:
    Target star is in Hydra, about 7.6 degrees SW of 2.0 mag star alpha Hydrae = SAO 136871.
    Target star is broghter component in a pair. On RealSky image is this component 11" in PA 34 degrees
    and fainter by about 1(?; only estimate) magnitude.
    !!! 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 GUIDE7):
 * occulted star is in center - labeled with cross
 * field is 3.0x3.0 degrees
 * limiting magnitude is 13.0
 * labeled stars have indicated SAO numbers
 * remarks: Second chart gives 5' detail from Realsky.








Data for the minor planet:
 * general information:
     number, name: (582) Olympia
     approx. diameter [km]: 47
 * orbital information
     orbit source: calculation Manek
     source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
     number of used observations: 96 USNO, 4 TMO
     number of rejected observations: 7 USNO
     time covered by the observations: 1998 12 10 - 2002 12 02
     rms residuals ["] (RA,DE): 0.06", 0.10"
     estimated positional accuracy at epoch of event ["]: 0.05", 0.09"
     remarks:

Data for the event:
 * UT date and time of least geocentric approach: 00:43.9 UT
 * approx. V mag of minor planet at event [mag]: 12.6
 * geocentric parallax of minor planet ["]: 6.098
 * magnitude drop [mag]: 1.5
 * estimated maximum duration [s]: 10.9
 * apparent motion of minor planet ["/h]: 14.79
 * angular distance to moon, phase of moon [deg,%]: 141, 44%
 * remarks:

Elements for WinOccult:
============ cut here ===========================================
 2002 Dec 11
582 Olympia
 0h 43.9m UT
 -14 03311  11.4    9  6  4.597-14  8 46.65TAC -14 03311
12.6     47   10.9   1.442     0.972     -4.30
   45.985 -14.144   167.29  -22.97
  0.7310   .27477   .89764  2.31937 -0.70677 -0.00431  0.00273
2000    1.33507777200212 2.00000310.185467155.82117730.014025 0.225569392.609390192.020791659.105   0.15
RATE 2.3382747 .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 .............................
      o  '  "     o  '  "    h  m  s     o     o    o  '  "    o  '  "
                                                   Latitude   Latitude
     44  0  0    68 47  8    0 36  6     7   -34   67 22  9   70 29 47
     46  0  0    67  9 18    0 36 25     9   -34   65 52  5   68 38 56
     48  0  0    65 37  8    0 36 48    10   -33   64 25 59   66 57 36
     50  0  0    64  9 52    0 37 13    12   -33   63  3 36   65 23 26
     52  0  0    62 47  1    0 37 40    13   -32   61 44 47   63 55 10
     54  0  0    61 28 20    0 38 10    14   -32   60 29 29   62 32  4
     56  0  0    60 13 36    0 38 42    15   -31   59 17 39   61 13 42
     58  0  0    59  2 45    0 39 15    16   -30   58  9 18   59 59 47
     60  0  0    57 55 42    0 39 51    17   -29   57  4 25   58 50  7
     62  0  0    56 52 25    0 40 27    18   -28   56  3  2   57 44 34
     64  0  0    55 52 53    0 41  4    19   -27   55  5 11   56 43  4
     66  0  0    54 57  5    0 41 42    19   -25   54 10 52   55 45 34
     68  0  0    54  5  2    0 42 21    19   -24   53 20  7   54 52  0
     70  0  0    53 16 43    0 42 60    20   -23   52 32 58   54  2 21
     72  0  0    52 32  8    0 43 39    20   -21   51 49 25   53 16 36
     74  0  0    51 51 16    0 44 17    20   -20   51  9 29   52 34 42
     76  0  0    51 14  8    0 44 56    20   -18   50 33 10   51 56 39
     78  0  0    50 40 42    0 45 33    19   -17   50  0 27   51 22 26
     80  0  0    50 10 59    0 46 10    19   -15   49 31 21   50 51 60
     82  0  0    49 44 55    0 46 46    19   -14   49  5 51   50 25 20
     84  0  0    49 22 31    0 47 20    18   -12   48 43 56   50  2 24
     86  0  0    49  3 44    0 47 54    17   -11   48 25 33   49 43 10
     88  0  0    48 48 33    0 48 25    16   -10   48 10 43   49 27 37
     90  0  0    48 36 56    0 48 55    16    -8   47 59 22   49 15 42
     92  0  0    48 28 50    0 49 24    15    -7   47 51 29   49  7 22
     94  0  0    48 24 14    0 49 50    14    -6   47 47  2   49  2 35
   ........................... shortened .............................

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Jan Manek
Stefanik Observatory                Private :
Petrin 205                          Werichova 950
118 46  Praha 1                     152 00  Praha 5 - Barrandov     |_|_|
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Internet : jan.manek@worldonline.cz                                |-O-O-|
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