Update for (58) Concordia - July 10/11, 2003

Jan Manek's update

                    IOTA/IOTA-ES occultation update for
             (58) Concordia / TYC 5737-00035-1 on July 10/11, 2003
                         not visible from any land

Summary 

In the night of July 10/11, 2003 a bright 9.6 mag star TYC 5737-00035-1 will be occulted by a 98 km asteroid (58) Concordia. This update is based on USNO/Flagstaff astrometry for the asteroid and UCAC2-beta star position.

The updated path shows ~1 path width north shift with time ~0.7 minutes earlier compared to Edwin Goffin's nominal prediction.

Updated path runs over Atlantic ocean between Iceland and Scotland in twilight zone. No chance for anybody. 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 10, 2003 @ 23:30 UT
 * magnitude of target star: 9.6
 * magnitude drop [mag]: 3.0
 * estimated maximum duration [s]: 8.9
 * path description: given above
 * Goffin's original chart reference: A03_0705

The occultation path:
 * approximate ground width [km]: 600
 * uncertainty [path widths]: 0.95
 * uncertainty in time [s]: 8
 * 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 5737-00035-1 = PPM 236632
 * constellation: Sagittarius
 * J2000 position [h,m,s; o,',"]: 19h 52m 59.2549s; -14o 52' 31.716"
 * position source: recent UCAC2 beta
 * estimated accuracy ["]: 0.02" (0.01", 0.01")
 * V mag [mag]: 9.61
 * B-V [mag]: +0.90
 * remarks:
    Target star is in northeast Sagittarius, about 6.6 degrees west of 3.1 mag star beta Capricorni = SAO 163481.
    !!! 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: (58) Concordia
     approx. diameter [km]: 98
 * orbital information
     orbit source: calculation Manek
     source of used astrometry: USNO/Flagstaff (Ron Stone)
     number of used observations: 122 USNO
     number of rejected observations: 13 USNO
     time covered by the observations: 1998 03 10 - 2003 06 27
     rms residuals ["] (RA,DE): 0.06", 0.07"
     estimated positional accuracy at epoch of event ["]: 0.06", 0.07"
     remarks:

Data for the event:
 * UT date and time of least geocentric approach: 23:30.6 UT
 * approx. V mag of minor planet at event [mag]: 12.5
 * geocentric parallax of minor planet ["]: 5.149
 * magnitude drop [mag]: 3.0
 * estimated maximum duration [s]: 8.9
 * apparent motion of minor planet ["/h]: 32.07
 * angular distance to moon, phase of moon [deg,%]: 48, 89%
 * remarks:

Elements for WinOccult:
============ cut here ===========================================
 2003 Jul 10
58 Concordia
23h 30.6m UT
37-00035-1   9.6   19 52 59.255-14 52 31.71TYC 5737-00035-1
12.5     98    8.9   1.708    -2.140     -8.18
   17.112 -14.872  -171.31   22.19
 23.5106  -.25033   .95028 -6.02396 -1.58832 -0.00073 -0.00071
2000    93.77194572003 710.0000033.702198 161.3029665.057555  0.042728972.700437432.585050508.855   0.15
RATE 2.2210222 .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  '  "
     20  0  0    .. .. ..   .. .. ..    ..    ..    ..   .. .. ..   .. .. ..   .. .. ..   73 19 12
     18  0  0    .. .. ..   .. .. ..    ..    ..    ..   .. .. ..   .. .. ..   .. .. ..   70 36 24
     16  0  0    .. .. ..   .. .. ..    ..    ..    ..   .. .. ..   .. .. ..   .. .. ..   68 40 38
     14  0  0    .. .. ..   .. .. ..    ..    ..    ..   .. .. ..   .. .. ..   .. .. ..   67  3 41
     12  0  0    .. .. ..   .. .. ..    ..    ..    ..   .. .. ..   .. .. ..   .. .. ..   65 38 16
     10  0  0    .. .. ..   .. .. ..    ..    ..    ..   .. .. ..   .. .. ..   .. .. ..   64 21 17
      8  0  0    .. .. ..   .. .. ..    ..    ..    ..   .. .. ..   .. .. ..   .. .. ..   63 11  1
      6  0  0    .. .. ..   .. .. ..    ..    ..    ..   .. .. ..   69  1 39   .. .. ..   62  6 26
      4  0  0    .. .. ..   .. .. ..    ..    ..    ..   .. .. ..   67  5  5   .. .. ..   61  6 52
      2  0  0    .. .. ..   .. .. ..    ..    ..    ..   .. .. ..   65 35 12   .. .. ..   60 11 52
      0  0  0    70 49  9   23 29  8     4   163     3   .. .. ..   64 19 49   .. .. ..   59 21  5
   -  2  0  0    67 40 36   23 29 24     6   161     0   .. .. ..   63 14 26   .. .. ..   58 34 16
   -  4  0  0    66  2 58   23 29 37     8   159    -1   .. .. ..   62 16 50   .. .. ..   57 51 15
   -  6  0  0    64 48  5   23 29 50     8   157    -2   .. .. ..   61 25 44   .. .. ..   57 11 51
   -  8  0  0    63 46 26   23 30  2     9   155    -3   .. .. ..   60 40 18   .. .. ..   56 36  0
   - 10  0  0    62 54 17   23 30 14     9   153    -4   68 38 18   59 59 59   .. .. ..   56  3 34
   - 12  0  0    62  9 44   23 30 25    10   151    -4   66 43 31   59 24 23   .. .. ..   55 34 31
   - 14  0  0    61 31 38   23 30 36    10   149    -4   65 33 49   58 53 13   .. .. ..   55  8 46
   - 16  0  0    60 59 17   23 30 47    10   148    -5   64 42  0   58 26 17   .. .. ..   54 46 17
   - 18  0  0    60 32 11   23 30 58    10   146    -5   64  1 44   58  3 26   .. .. ..   54 27  3
   - 20  0  0    60 10  0   23 31  8     9   144    -5   63 30 19   57 44 31   .. .. ..   54 11  1
   - 22  0  0    59 52 31   23 31 18     9   142    -4   63  6 20   57 29 29   .. .. ..   53 58 10
   - 24  0  0    59 39 34   23 31 27     9   140    -4   62 49  0   57 18 15   .. .. ..   53 48 31
   - 26  0  0    59 31  3   23 31 36     8   138    -4   62 37 49   57 10 48   .. .. ..   53 42  2
   - 28  0  0    59 26 54   23 31 43     7   136    -3   62 32 33   57  7  6   .. .. ..   53 38 44
   - 30  0  0    59 27  6   23 31 51     7   135    -3   62 33  5   57  7  9   .. .. ..   53 38 37
   - 32  0  0    59 31 41   23 31 57     6   133    -2   62 39 29   57 10 59   .. .. ..   53 41 43
   - 34  0  0    59 40 43   23 32  3     5   131    -1   62 51 55   57 18 36   .. .. ..   53 48  1
   - 36  0  0    59 54 17   23 32  8     4   129     0   63 10 47   57 30  5   .. .. ..   53 57 34
   - 38  0  0    60 12 33   23 32 12     3   128     0   63 36 42   57 45 30   .. .. ..   54 10 23
   - 40  0  0    60 35 44   23 32 15     2   126     1   64 10 44   58  4 56   .. .. ..   54 26 30
   - 42  0  0    61  4  9   23 32 16     1   124     2   .. .. ..   58 28 30   .. .. ..   54 45 58
   - 44  0  0    61 38 12   23 32 17     0   122     4   .. .. ..   58 56 23   .. .. ..   55  8 49
   - 46  0  0    .. .. ..   .. .. ..    ..    ..    ..   .. .. ..   59 28 47   .. .. ..   55 35  8
   - 48  0  0    .. .. ..   .. .. ..    ..    ..    ..   .. .. ..   .. .. ..   .. .. ..   56  4 59
    ...................................... 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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