Update for (362) Havnia - December 12/13, 2003

Jan Manek's update

                  IOTA/IOTA-ES occultation update for
        (362) Havnia / TYC 2412-00529-1 on December 12/13, 2003
   visible from Alaska, N Finland, Sweden, very S Norway and N Denmark


Summary 

In the night of December 12/13, 2003 a faint 11.3 mag star TYC 2412-00529-1 will be occulted by a 53 km asteroid (362) Havnia. This update is based on USNO/Flagstaff and TMO astrometry for the asteroid and UCAC2 star position.

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

Updated path runs due to north shift over Alaska ~16:01 UT, N Finland ~16:08.7 UT, Sweden from NE to SW around 16:09.4 UT, very S Norway ~16:09.8 UT and N Denmark ~16:10.0 UT. Please check the path chart for details.

Target is southwest star in a 29" wide equal bright pair named SEI 360.

Here is current station list for European cities.

Clear sky and good luck !!!

The event at one glimpse:
 * date and approx. UT time of event: December 12, 2003 @ 16:09 UT (Europe)
 * magnitude of target star: 11.3
 * magnitude drop [mag]: 1.4
 * estimated maximum duration [s]: 4.8
 * path description: given above
 * Goffin's original chart reference: A03_1219

The occultation path:
 * approximate ground width [km]: 80
 * uncertainty [path widths]: 1.15
 * uncertainty in time [s]: 6
 * 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 2412-00529-1
 * constellation: Auriga
 * J2000 position [h,m,s; o,',"]: 05h 38m 16.4394s; +34o 24' 36.730"
 * position source: UCAC2
 * estimated accuracy ["]: 0.03" (0.02", 0.02")
 * V mag [mag]: 11.26
 * B-V [mag]: +0.28
 * remarks:
    Target star is in south Auriga, about 5.2 degrees southwest of 2.6 mag star theta Aurigae = SAO 58636 or
    about 0.5 degree northeast of open cluster M36.
    Target is southwest star in a 29" wide equal bright pair named SEI 360.
    !!! 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 3 degrees blowup to show correctly the star in field.










Data for the minor planet:
 * general information:
     number, name: (362) Havnia
     approx. diameter [km]: 53
 * orbital information
     orbit source: calculation Manek
     source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
     number of used observations: 108 USNO, 15 TMO
     number of rejected observations: 22 USNO
     time covered by the observations: 1998 07 10 - 2003 11 24
     rms residuals ["] (RA,DE): 0.08", 0.09"
     estimated positional accuracy at epoch of event ["]: 0.05", 0.05"
     remarks:

Data for the event:
 * UT date and time of least geocentric approach: 16:04.2 UT
 * approx. V mag of minor planet at event [mag]: 12.3
 * geocentric parallax of minor planet ["]: 5.835
 * magnitude drop [mag]: 1.4
 * estimated maximum duration [s]: 4.8
 * apparent motion of minor planet ["/h]: 36.49
 * angular distance to moon, phase of moon [deg,%]: 37, 89%
 * remarks:

Elements for WinOccult:
============ cut here ===========================================
 2003 Dec 12
  362  Havnia
16h  4.2m UT
  11.3    5 38 16.439 34 24 36.73TYC 2412-00529-1      11.5
12.3     53    4.8   1.507    -2.924      4.70
 -237.428  34.410   -62.64  -23.08
 16.0701   .09461   .72751 -6.20030  0.80716 -0.00051 -0.00113
2000    21.6678460200312 7.0000031.146289 27.418180 8.071281  0.042710822.578419882.468293449.005   0.15
RATE 2.3805298 .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
    ...................................... shortened .............................................
      o  '  "     o  '  "    h  m  s     o     o     o    o  '  "    o  '  "    o  '  "    o  '  "
                                                        Longitude  Longitude  Longitude  Longitude
     33  0  0    72 22  2   16  8  4    33    79   -24   72 59  0   71 45 50   74 27 16   70 25 15
     32  0  0    71 55 34   16  8  8    32    78   -24   72 32 51   71 19  4   74  1 57   69 57 51
     31  0  0    71 28  7   16  8 12    32    77   -23   72  5 43   70 51 20   73 35 36   69 29 31
     30  0  0    70 59 40   16  8 17    32    76   -23   71 37 33   70 22 36   73  8 11   69  0 13
     29  0  0    70 30 11   16  8 21    31    75   -22   71  8 20   69 52 52   72 39 41   68 29 57
     28  0  0    69 59 40   16  8 26    31    74   -22   70 38  4   69 22  6   72 10  4   67 58 42
     27  0  0    69 28  5   16  8 31    30    72   -22   70  6 43   68 50 19   71 39 20   67 26 27
     26  0  0    68 55 26   16  8 36    30    71   -21   69 34 17   68 17 28   71  7 26   66 53 12
     25  0  0    68 21 43   16  8 41    29    70   -21   69  0 45   67 43 34   70 34 22   66 18 57
     24  0  0    67 46 54   16  8 46    29    69   -20   68 26  6   67  8 37   70  0  8   65 43 41
     23  0  0    67 11  0   16  8 51    28    68   -20   67 50 20   66 32 36   69 24 43   65  7 24
     22  0  0    66 34  2   16  8 56    28    67   -19   67 13 28   65 55 31   68 48  7   64 30  7
     21  0  0    65 55 58   16  9  1    27    66   -19   66 35 29   65 17 23   68 10 20   63 51 50
     20  0  0    65 16 50   16  9  6    26    65   -18   65 56 24   64 38 13   67 31 23   63 12 33
     19  0  0    64 36 39   16  9 11    26    63   -18   65 16 14   63 58  0   66 51 15   62 32 18
     18  0  0    63 55 25   16  9 16    25    62   -17   64 34 59   63 16 47   66  9 59   61 51  6
     17  0  0    63 13 10   16  9 21    24    61   -16   63 52 42   62 34 34   65 27 35   61  8 57
     16  0  0    62 29 55   16  9 27    23    60   -16   63  9 23   61 51 23   64 44  5   60 25 53
     15  0  0    61 45 43   16  9 32    23    59   -15   62 25  5   61  7 16   63 59 32   59 41 56
     14  0  0    61  0 34   16  9 37    22    58   -14   61 39 49   60 22 14   63 13 56   58 57  8
     13  0  0    60 14 31   16  9 42    21    57   -14   60 53 37   59 36 19   62 27 20   58 11 31
     12  0  0    59 27 37   16  9 47    20    56   -13   60  6 33   58 49 35   61 39 48   57 25  6
     11  0  0    58 39 55   16  9 51    19    55   -12   59 18 38   58  2  3   60 51 22   56 37 57
     10  0  0    57 51 26   16  9 56    19    54   -11   58 29 56   57 13 47   60  2  5   55 50  6
      9  0  0    57  2 13   16 10  1    18    53   -10   57 40 29   56 24 48   59 12  0   55  1 35
      8  0  0    56 12 21   16 10  5    17    52   -10   56 50 21   55 35 10   58 21 11   54 12 27
      7  0  0    55 21 52   16 10  9    16    52    -9   55 59 35   54 44 57   57 29 42   53 22 46
      6  0  0    54 30 49   16 10 13    15    51    -8   55  8 14   53 54 10   56 37 35   52 32 34
      5  0  0    53 39 16   16 10 17    14    50    -7   54 16 23   53  2 55   55 44 55   51 41 54
      4  0  0    52 47 16   16 10 21    13    49    -6   53 24  3   52 11 13   54 51 45   50 50 50
      3  0  0    51 54 52   16 10 24    12    48    -5   52 31 19   51 19  8   53 58 10   49 59 24
      2  0  0    51  2  9   16 10 27    11    47    -4   51 38 15   50 26 44   53  4 13   49  7 41
      1  0  0    50  9  9   16 10 30    10    46    -3   50 44 54   49 34  3   52  9 58   48 15 42
      0  0  0    49 15 56   16 10 33     9    46    -2   49 51 20   48 41 11   51 15 28   47 23 31
   -  1  0  0    48 22 33   16 10 35     7    45    -1   48 57 35   47 48  9   50 20 48   46 31 13
   -  2  0  0    47 29  4   16 10 37     6    44     0   48  3 45   46 55  1   49 26  2   45 38 49
   -  3  0  0    46 35 33   16 10 39     5    43     1   47  9 51   46  1 51   48 31 12   44 46 23
    ...................................... 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 AT worldonline.cz                             |-O-O-|
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