Update for (564) Dudu - October 18/19, 2003

Update computed by Jan Manek; issued 15 Oct 2003 22:36 +0200 (CEST)

Jan Manek's update

                IOTA/IOTA-ES occultation update for
         (564) Dudu / TYC 1940-00086-1 on October 18/19, 2003
              visible from Haiti, Scotland and S Norway


Summary

In the night of October 18/19, 2003 a faint 10.5 mag star TYC 1940-00086-1 will be occulted by a 51 km asteroid (564) Dudu. This update is based on USNO/Flagstaff and Ondrejov astrometry for the asteroid and UCAC2 star position.

The updated path shows ~1 path width north shift with time ~0.1 minutes earlier compared to Edwin Goffin's nominal prediction.

Updated path runs due to north shift over Haiti ~5:30.4 UT, Scotland 5:35.6 UT and S Norway ~5:36.3 UT. Please check the path chart for details.

Waning Moon is only 6 degrees south of target star.Clear sky and good luck !!!

The event at one glimpse: * date and approx. UT time of event: October 19, 2003 @ 05:36 UT (Europe) * magnitude of target star: 10.5 * magnitude drop [mag]: 6.2 * estimated maximum duration [s]: 3.0 * path description: given above * Goffin's original chart reference: A03_1037 The occultation path: * approximate ground width [km]: 60 * uncertainty [path widths]: 3.7 * uncertainty in time [s]: 11 * 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 1940-00086-1 * constellation: Cancer * J2000 position [h,m,s; o,',"]: 08h 19m 00.4469s; +29o 54' 55.488" * position source: UCAC2 * estimated accuracy ["]: 0.03" (0.02", 0.02") * V mag [mag]: 10.47 * B-V [mag]: +0.65 * remarks: Target star is in north Cancer, about 7.5 degrees east of 1.2 mag star beta Geminorum = SAO 79666. !!! 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 13.0 * 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: (564) Dudu approx. diameter [km]: 51 * orbital information orbit source: calculation Manek source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen), Ondrejov (Sarounova, Manek) number of used observations: 89 USNO, 4 TMO, 4 Ondrejov number of rejected observations: 25 USNO time covered by the observations: 1998 10 24 - 2003 10 13 rms residuals ["] (RA,DE): 0.09", 0.09" estimated positional accuracy at epoch of event ["]: 0.07", 0.07" remarks: Data for the event: * UT date and time of least geocentric approach: 05:35.8 UT * approx. V mag of minor planet at event [mag]: 16.7 * geocentric parallax of minor planet ["]: 2.556 * magnitude drop [mag]: 6.2 * estimated maximum duration [s]: 3.0 * apparent motion of minor planet ["/h]: 24.19 * angular distance to moon, phase of moon [deg,%]: 6, 43% * remarks: Elements for WinOccult: ============ cut here =========================================== 2003 Oct 19 564 Dudu 5h 35.8m UT 10.5 8 19 0.447 29 54 55.49TYC 1940-00086-1 11.1 16.7 51 3.0 3.440 1.792 6.46 13.501 29.914 92.32 -9.83 5.5974 -.13200 .48152 9.11730 2.52391 -0.00573 0.00145 2000 177.87626020031018.00000214.82641470.982096 17.958670 0.273499912.750406471.9981705410.45 0.15 RATE 2.1607710 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 ============ cut here =========================================== Calculator(s): Jan Manek

Updated path location for (564) Dudu on October 18/19, 2003

Updated path location for (564) Dudu on October 18/19, 2003

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 ' " Latitude Latitude Latitude Latitude - 79 0 0 14 38 46 5 30 22 4 60 -81 14 19 47 14 57 49 12 3 16 17 19 19 - 78 0 0 15 15 52 5 30 22 5 60 -80 14 56 48 15 35 1 12 39 39 17 57 13 - 77 0 0 15 53 28 5 30 23 6 61 -79 15 34 18 16 12 43 13 16 32 18 35 36 - 76 0 0 16 31 33 5 30 24 7 61 -78 16 12 17 16 50 52 13 53 53 19 14 27 - 75 0 0 17 10 4 5 30 25 8 61 -77 16 50 44 17 29 30 14 31 42 19 53 46 - 74 0 0 17 49 2 5 30 27 10 62 -76 17 29 36 18 8 33 15 9 58 20 33 31 - 73 0 0 18 28 26 5 30 28 11 62 -74 18 8 54 18 48 2 15 48 40 21 13 40 - 72 0 0 19 8 13 5 30 30 12 62 -73 18 48 36 19 27 54 16 27 45 21 54 13 - 71 0 0 19 48 22 5 30 32 13 63 -72 19 28 41 20 8 9 17 7 14 22 35 7 - 70 0 0 20 28 53 5 30 34 14 63 -71 20 9 6 20 48 44 17 47 5 23 16 22 - 69 0 0 21 9 43 5 30 36 15 63 -70 20 49 52 21 29 40 18 27 16 23 57 56 - 68 0 0 21 50 52 5 30 39 17 64 -69 21 30 56 22 10 53 19 7 46 24 39 47 - 67 0 0 22 32 17 5 30 42 18 64 -68 22 12 16 22 52 23 19 48 34 25 21 53 - 66 0 0 23 13 58 5 30 44 19 65 -66 22 53 52 23 34 8 20 29 38 26 4 14 - 65 0 0 23 55 52 5 30 47 20 65 -65 23 35 41 24 16 7 21 10 56 26 46 47 - 64 0 0 24 37 57 5 30 50 21 66 -64 24 17 43 24 58 17 21 52 28 27 29 30 - 63 0 0 25 20 13 5 30 54 22 66 -63 24 59 55 25 40 37 22 34 11 28 12 22 - 62 0 0 26 2 37 5 30 57 23 67 -62 25 42 15 26 23 5 23 16 4 28 55 21 - 61 0 0 26 45 8 5 31 1 24 67 -61 26 24 42 27 5 39 23 58 5 29 38 24 ...................................... shortened ............................................. - 16 0 0 53 30 42 5 34 46 58 125 -19 53 11 39 53 49 49 50 54 37 56 11 41 - 15 0 0 53 54 3 5 34 50 58 127 -18 53 35 6 54 13 5 51 18 44 56 34 14 - 14 0 0 54 16 50 5 34 55 58 129 -18 53 57 58 54 35 46 51 42 15 56 56 12 - 13 0 0 54 39 3 5 35 0 59 131 -17 54 20 16 54 57 53 52 5 11 57 17 36 - 12 0 0 55 0 41 5 35 4 59 133 -16 54 42 0 55 19 26 52 27 34 57 38 26 - 11 0 0 55 21 46 5 35 9 59 135 -16 55 3 10 55 40 25 52 49 23 57 58 43 - 10 0 0 55 42 17 5 35 13 59 137 -15 55 23 47 56 0 51 53 10 38 58 18 26 - 9 0 0 56 2 15 5 35 17 59 139 -15 55 43 51 56 20 43 53 31 20 58 37 37 - 8 0 0 56 21 41 5 35 22 59 141 -14 56 3 22 56 40 4 53 51 30 58 56 16 - 7 0 0 56 40 35 5 35 26 59 143 -13 56 22 22 56 58 53 54 11 7 59 14 23 - 6 0 0 56 58 58 5 35 30 60 145 -13 56 40 50 57 17 10 54 30 12 59 32 0 - 5 0 0 57 16 49 5 35 34 60 146 -12 56 58 46 57 34 56 54 48 46 59 49 5 - 4 0 0 57 34 10 5 35 39 60 148 -12 57 16 13 57 52 12 55 6 48 60 5 41 - 3 0 0 57 51 1 5 35 43 60 150 -11 57 33 8 58 8 57 55 24 20 60 21 47 - 2 0 0 58 7 22 5 35 47 60 152 -11 57 49 35 58 25 13 55 41 22 60 37 24 - 1 0 0 58 23 14 5 35 51 60 154 -10 58 5 32 58 41 0 55 57 54 60 52 33 0 0 0 58 38 37 5 35 55 60 156 -10 58 21 0 58 56 18 56 13 57 61 7 14 1 0 0 58 53 32 5 35 58 60 158 -9 58 35 59 59 11 8 56 29 30 61 21 27 2 0 0 59 7 59 5 36 2 60 160 -9 58 50 31 59 25 31 56 44 35 61 35 13 3 0 0 59 21 59 5 36 6 60 162 -8 59 4 35 59 39 26 56 59 12 61 48 32 4 0 0 59 35 31 5 36 10 60 163 -8 59 18 13 59 52 54 57 13 21 62 1 26 5 0 0 59 48 38 5 36 13 59 165 -7 59 31 23 60 5 55 57 27 3 62 13 53 6 0 0 60 1 18 5 36 17 59 167 -7 59 44 7 60 18 31 57 40 18 62 25 56 7 0 0 60 13 32 5 36 21 59 169 -6 59 56 26 60 30 41 57 53 7 62 37 33 8 0 0 60 25 21 5 36 24 59 171 -6 60 8 19 60 42 26 58 5 29 62 48 46 9 0 0 60 36 45 5 36 28 59 172 -5 60 19 47 60 53 46 58 17 25 62 59 36 10 0 0 60 47 44 5 36 31 59 174 -5 60 30 50 61 4 41 58 28 56 63 10 1 11 0 0 60 58 20 5 36 35 59 176 -4 60 41 30 61 15 13 58 40 2 63 20 4 12 0 0 61 8 31 5 36 38 59 178 -4 60 51 45 61 25 21 58 50 44 63 29 43 13 0 0 61 18 19 5 36 42 59 179 -3 61 1 37 61 35 5 59 1 1 63 39 0 ...................................... 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-| --------------------------------------------------------------------U---U---

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