Update for (1567) Alikoski - August 29/30, 2002

Jan Manek's update

                    IOTA/IOTA-ES occultation update for
              (1567) Alikoski / HIP 26351 on August 29/30, 2002
          visible from N Italy, E Austria, SE Germamy, Czechia, Poland,
                    coast of Baltic republics and Finland


Summary 

In the night of August 29/30, 2002 a brigh 8.2 mag star HIP 26351 = SAO 77314 will be occulted by a 71 km asteroid (1567) Alikoski. This update is based on USNO/Flagstaff astrometry for the asteroid and Hipparcos star position.

Updated path runs over N Italy ~23:54.7 UT, E Austria ~23:54.8 UT, SE Germamy few seconds later, Czechia ~23:54.9 UT, Poland ~23:55.1 UT, coast of Baltic republics ariound 23:55:4 UT and Finland around 23:56 UT. Keep in mind the probable uncertainty ....
Please check the path chart for details.

Clear sky and good luck !!!

The event at one glimpse:
 * date and approx. UT time of event: August 29, 2002 @ 23:55 UT
 * magnitude of target star: 8.2
 * magnitude drop [mag]: 7.4
 * estimated maximum duration [s]: 2.8
 * path description: given above
 * Goffin's original chart reference: none - not predicted by Goffin

The occultation path:
 * approximate ground width [km]: 140
 * uncertainty [path widths]: 4.2
 * uncertainty in time [s]: 10
 * map: below
 * remarks: Path uncertainties are given according to nominal star
    position errors and expected asteroid positional accuracy.

Data for the target star:
 * name: HIP 26351 = SAO 77314 = PPM 94560 = TYC 1869-01759-1
 * constellation: Taurus
 * J2000 position [h,m,s; o,',"]: 05h 36m 39.7997s; +27o 54' 42.301"
 * position source: Hipparcos
 * estimated accuracy ["]: 0.02" (0.013", 0.009")
 * V mag [mag]: 8.25
 * B-V [mag]: +0.33
 * remarks:
    Target star is in north Taurus, about 2.4 degrees southeast of 1.7 mag star beta Tauri = SAO 77168.
    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 5.0x5.0 degrees
 * limiting magnitude is 11.0
 * labeled stars have indicated SAO numbers
 * remarks: Second chart is a RealSky image showing the double star in detail.





Data for the minor planet:
 * general information:
     number, name: (1567) Alikoski
     approx. diameter [km]: 71
 * orbital information
     orbit source: calculation Manek
     source of used astrometry: USNO/Flagstaff (Ron Stone), Florissant
     number of used observations: 67 USNO, 1 Florissant
     number of rejected observations: 15 USNO
     time covered by the observations: 1996 12 26 - 2001 12 31
     rms residuals ["] (RA,DE): 0.10", 0.13"
     estimated positional accuracy at epoch of event ["]: 0.08", 0.11"
     remarks: No recent opposition astrometry.

Data for the event:
 * UT date and time of least geocentric approach: 23:56.7 UT
 * approx. V mag of minor planet at event [mag]: 15.6
 * geocentric parallax of minor planet ["]: 2.586
 * magnitude drop [mag]: 7.4
 * estimated maximum duration [s]: 2.8
 * apparent motion of minor planet ["/h]: 38.82
 * angular distance to moon, phase of moon [deg,%]: 31, 61%
 * remarks:

Elements for WinOccult:
============ cut here ===========================================
 2002 Aug 29
1567 Alikoski
23h 56.7m UT
HIP  26351   8.2    5 36 39.800 27 54 42.30
15.6     71    2.8   3.401     2.671     11.03
 -253.013  27.909  -178.96    9.14
 23.9443  -.25251   .81121 13.69190  4.26436 -0.00542 -0.00007
2000    270.0158192002 824.00000115.20690751.763691 17.278819 0.085842593.209518612.934005209.475   0.15
RATE 1.7141320 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000
============ cut here ===========================================


Calculator(s): Jan Manek





Path coordinates:
                                                  (Latitude   Latitude)
                  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  '  "
                                                  Longitude  Longitude
   -  2 12  0    37  0  0   23 54 28     2   -44 -  0 57 48 -  3 28 26
   -  0 37 32    38  0  0   23 54 29     4   -43    0 35  3 -  1 52  7
      0 52 49    39  0  0   23 54 30     5   -42    2  4  5 -  0 20 17
      2 19 30    40  0  0   23 54 31     7   -41    3 29 42    1  7 37
      3 42 54    41  0  0   23 54 33     8   -40    4 52 15    2 31 58
      5  3 21    42  0  0   23 54 35    10   -39    6 12  3    3 53 10
      6 21  6    43  0  0   23 54 37    11   -38    7 29 19    5 11 30
      7 36 25    44  0  0   23 54 39    12   -37    8 44 18    6 27 13
      8 49 28    45  0  0   23 54 42    14   -36    9 57 11    7 40 31
     10  0 28    46  0  0   23 54 44    15   -34   11  8  7    8 51 37
     11  9 32    47  0  0   23 54 47    16   -33   12 17 15   10  0 40
     12 16 49    48  0  0   23 54 50    17   -32   13 24 43   11  7 48
     13 22 26    49  0  0   23 54 53    18   -31   14 30 39   12 13  9
     14 26 30    50  0  0   23 54 57    19   -30   15 35  7   13 16 50
     15 29  6    51  0  0   23 55  0    20   -29   16 38 15   14 18 56
     16 30 19    52  0  0   23 55  4    21   -28   17 40  6   15 19 32
     17 30 14    53  0  0   23 55  7    22   -26   18 40 46   16 18 43
     18 28 54    54  0  0   23 55 11    23   -25   19 40 18   17 16 32
     19 26 24    55  0  0   23 55 15    24   -24   20 38 47   18 13  4
     20 22 47    56  0  0   23 55 19    24   -23   21 36 16   19  8 20
     21 18  4    57  0  0   23 55 23    25   -22   22 32 48   20  2 23
     22 12 19    58  0  0   23 55 27    26   -21   23 28 26   20 55 15
     23  5 34    59  0  0   23 55 31    26   -20   24 23 13   21 46 58
     23 57 50    60  0  0   23 55 35    27   -19   25 17 10   22 37 33
     24 49  9    61  0  0   23 55 39    28   -18   26 10 21   23 26 60
     25 39 32    62  0  0   23 55 43    28   -16   27  2 46   24 15 19
     26 28 59    63  0  0   23 55 48    29   -15   27 54 28   25  2 30
     27 17 31    64  0  0   23 55 52    29   -14   28 45 28   25 48 33
     28  5  7    65  0  0   23 55 56    30   -13   29 35 47   26 33 24
     28 51 46    66  0  0   23 56  1    30   -12   30 25 26   27 17  2
     29 37 28    67  0  0   23 56  5    30   -11   31 14 26   27 59 24
     30 22 10    68  0  0   23 56 10    31   -10   32  2 48   28 40 25
     31  5 50    69  0  0   23 56 14    31    -9   32 50 30   29 19 58
     31 48 23    70  0  0   23 56 19    31    -8   33 37 34   29 57 58
     32 29 44    71  0  0   23 56 23    31    -7   34 23 58   30 34 14
     33  9 48    72  0  0   23 56 28    31    -6   35  9 40   31  8 35
     33 48 25    73  0  0   23 56 32    31    -5   35 54 39   31 40 45
     34 25 25    74  0  0   23 56 36    31    -4   36 38 51   32 10 26
     35  0 33    75  0  0   23 56 41    31    -3   37 22 12   32 37 12
     35 33 29    76  0  0   23 56 45    31    -3   38  4 36   33  0 31
   ........................... 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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