Update for (141) Lumen - July 31/August 1, 2003

Jan Manek's update

                    IOTA/IOTA-ES occultation update for
            (141) Lumen / TYC 7411-01009-1 on July 31/August 1, 2003
        visible from India, NE Egypt, Crete, Greece, Albania, SW Serbia,
    Croatia, Slovenia, W Hungary, E Austria, Czechia, E Germany and W Poland

Summary 

In the night of July 31/August 1, 2003 a faint 11.0 mag star TYC 7411-01009-1 will be occulted by a 135 km asteroid (141) Lumen. This update is based on USNO/Flagstaff and TMO astrometry for the asteroid and UCAC2-beta star position.

The updated path shows ~0.5 path width south shift with time ~0.3 minutes later compared to Edwin Goffin's nominal prediction.

Updated path runs due to south shift over India ~20:42.9 UT, NE Egypt ~20:50.5 UT, Crete ~20:51.7 UT, Greece ~20:52.2 UT, Albania ~20:52.6 UT, SW Serbia ~20:52.7 UT, Croatia ~20:53.0 UT, Slovenia ~20:53.2 UT, W Hungary ~20:53.2 UT, E Austria ~20:53.3 UT, Czechia ~20:53.5 UT, E Germany ~20:53.7 and W Poland ~20:53.5 UT. For the last countries the altitude of star is below 7 degrees. :-( Please check the path chart for details.

Clear sky and good luck !!!

The event at one glimpse:
 * date and approx. UT time of event: July 31, 2003 @ 20:53 UT
 * magnitude of target star: 11.0
 * magnitude drop [mag]: 1.3
 * estimated maximum duration [s]: 14.3
 * path description: given above
 * Goffin's original chart reference: A03_0712

The occultation path:
 * approximate ground width [km]: 265
 * uncertainty [path widths]: 0.7
 * uncertainty in time [s]: 7
 * 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 7411-01009-1
 * constellation: Sagittarius
 * J2000 position [h,m,s; o,',"]: 18h 44m 13.1874s; -32o 05' 26.579"
 * position source: recent UCAC2 beta
 * estimated accuracy ["]: 0.03" (0.02", 0.02")
 * V mag [mag]: 11.04
 * B-V [mag]: +1.18
 * remarks:
    Target star is in middle-south Sagittarius, about 4.5 degrees southwest of 2.6 mag star zeta Sagitterii = SAO 187600
    or 17' NE of globular cluster M 70.
    !!! 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 shows 30' blowup to show correctly the star in field.










Data for the minor planet:
 * general information:
     number, name: (141) Lumen
     approx. diameter [km]: 135
 * orbital information
     orbit source: calculation Manek
     source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
     number of used observations: 116 USNO, 9 TMO
     number of rejected observations: 29 USNO, 2 TMO
     time covered by the observations: 1998 02 12 - 2003 07 20
     rms residuals ["] (RA,DE): 0.07", 0.10"
     estimated positional accuracy at epoch of event ["]: 0.05", 0.08"
     remarks:

Data for the event:
 * UT date and time of least geocentric approach: 20:47.9 UT
 * approx. V mag of minor planet at event [mag]: 11.9
 * geocentric parallax of minor planet ["]: 5.583
 * magnitude drop [mag]: 1.3
 * estimated maximum duration [s]: 14.3
 * apparent motion of minor planet ["/h]: 29.74
 * angular distance to moon, phase of moon [deg,%]: 119, 8%
 * remarks:

Elements for WinOccult:
============ cut here ===========================================
 2003 Jul 31
141 Lumen
20h 47.9m UT
11-01009-1  11.0   18 44 13.187-32  5 26.58TYC 7411-01009-1
11.9    135   14.3   1.575    -2.088     13.38
   20.024 -32.093  -130.37   18.20
 20.7979   .38655   .76889 -4.75830  2.39561  0.00259  0.00095
2000    297.5114262003 730.0000057.669766 318.78881811.885573 0.215220822.665610012.091915248.195   0.15
RATE 2.2646920 .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  '  "
     90  0  0    25 44 46   20 42 11     3   232   -32   27 15  2   24 19  9   29 33  2   22 24 13
     89  0  0    25 10 24   20 42 12     4   232   -33   26 39  6   23 46  7   28 54 22   21 52 48
     88  0  0    24 37 45   20 42 14     5   231   -34   26  5  1   23 14 42   28 17 44   21 22 53
     87  0  0    24  6 45   20 42 16     6   231   -35   25 32 41   22 44 51   27 43  6   20 54 26
     86  0  0    23 37 22   20 42 19     7   230   -36   25  2  5   22 16 33   27 10 22   20 27 25
     85  0  0    23  9 34   20 42 22     8   230   -37   24 33  8   21 49 44   26 39 28   20  1 49
     84  0  0    22 43 18   20 42 25     9   230   -38   24  5 49   21 24 23   26 10 21   19 37 35
     83  0  0    22 18 32   20 42 29    10   229   -39   23 40  4   21  0 28   25 42 58   19 14 43
     82  0  0    21 55 14   20 42 33    11   229   -40   23 15 53   20 37 57   25 17 15   18 53 11
     81  0  0    21 33 23   20 42 38    12   228   -41   22 53 12   20 16 50   24 53  9   18 32 58
     80  0  0    21 12 56   20 42 42    13   228   -41   22 31 59   19 57  4   24 30 40   18 14  2
     79  0  0    20 53 53   20 42 48    14   227   -42   22 12 14   19 38 38   24  9 44   17 56 23
     78  0  0    20 36 12   20 42 53    14   227   -43   21 53 54   19 21 31   23 50 19   17 39 59
     77  0  0    20 19 51   20 42 59    15   227   -44   21 36 57   19  5 42   23 32 23   17 24 49
     76  0  0    20  4 50   20 43  5    16   226   -45   21 21 24   18 51  9   23 15 56   17 10 52
     75  0  0    19 51  7   20 43 11    17   226   -45   21  7 11   18 37 53   23  0 54   16 58  8
     74  0  0    19 38 41   20 43 17    18   225   -46   20 54 19   18 25 51   22 47 18   16 46 36
     73  0  0    19 27 32   20 43 24    19   225   -47   20 42 46   18 15  3   22 35  6   16 36 15
     72  0  0    19 17 39   20 43 31    19   224   -47   20 32 31   18  5 29   22 24 16   16 27  5
     71  0  0    19  9  0   20 43 38    20   224   -48   20 23 34   17 57  7   22 14 48   16 19  4
     70  0  0    19  1 36   20 43 46    21   223   -48   20 15 54   17 49 57   22  6 41   16 12 13
     69  0  0    18 55 25   20 43 54    21   223   -49   20  9 29   17 43 59   21 59 54   16  6 30
     68  0  0    18 50 28   20 44  1    22   222   -49   20  4 21   17 39 12   21 54 26   16  1 56
    ...................................... shortened .............................................
     33  0  0    29  1 42   20 50 10    28   193   -40   30 38  8   27 30 56   33  7 25   25 29 57
     32  0  0    29 44 57   20 50 22    27   192   -39   31 23 34   28 12 22   33 56 58   26  9 15
     31  0  0    30 30  5   20 50 34    27   191   -38   32 11  6   28 55 31   34 49  2   26 50  6
     30  0  0    31 17 10   20 50 45    26   190   -37   33  0 49   29 40 26   35 43 49   27 32 34
     29  0  0    32  6 17   20 50 57    25   189   -36   33 52 51   30 27 13   36 41 33   28 16 40
     28  0  0    32 57 33   20 51  8    25   188   -35   34 47 20   31 15 54   37 42 29   29  2 27
     27  0  0    33 51  3   20 51 20    24   187   -34   35 44 27   32  6 36   38 46 58   29 50  0
     26  0  0    34 46 57   20 51 31    23   186   -33   36 44 22   32 59 23   39 55 25   30 39 22
     25  0  0    35 45 24   20 51 42    22   185   -32   37 47 21   33 54 22   41  8 23   31 30 36
     24  0  0    36 46 33   20 51 53    21   184   -30   38 53 42   34 51 40   42 26 37   32 23 48
     23  0  0    37 50 39   20 52  4    20   184   -29   40  3 45   35 51 26   43 51 11   33 19  2
     22  0  0    38 57 57   20 52 14    19   183   -28   41 18  1   36 53 50   45 23 37   34 16 24
     21  0  0    40  8 47   20 52 24    18   182   -26   42 37  5   37 59  3   47  6 29   35 16  0
     20  0  0    41 23 33   20 52 34    17   181   -25   44  1 50   39  7 19   49  4 24   36 17 59
     19  0  0    42 42 47   20 52 44    15   180   -23   45 33 29   40 18 56   51 27 52   37 22 30
     18  0  0    44  7 14   20 52 53    14   179   -22   47 13 54   41 34 16   54 57 49   38 29 41
     17  0  0    45 37 53   20 53  1    12   178   -20   49  6 17   42 53 46   .. .. ..   39 39 46
     16  0  0    47 16 14   20 53 10    11   178   -19   51 16 47   44 18  3   .. .. ..   40 53  0
     15  0  0    49  4 38   20 53 17     9   177   -17   54  1 28   45 47 57   .. .. ..   42  9 41
     14  0  0    51  7 22   20 53 24     7   176   -15   .. .. ..   47 24 40   .. .. ..   43 30 13
     13  0  0    53 33 38   20 53 29     4   175   -12   .. .. ..   49 10  1   .. .. ..   44 55  5
     12  0  0    56 54 46   20 53 33     1   174    -9   .. .. ..   51  7  3   .. .. ..   46 24 57
    ...................................... 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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