Update for (1135) Colchis - September 12/13, 2003

Update computed by Jan Manek; issued 07 Sep 2003 22:48 +0200 (CEST)

Jan Manek's update

                   IOTA/IOTA-ES occultation update for
         (1135) Colchis / TYC 0617-00997-1 on September 12/13, 2003
        visible from Russia, Belarus, Lithuania, N Poland, N Germany,
                   N Netherlands, England and S Ireland


Summary

In the night of September 12/13, 2003 a faint 11.8 mag star TYC 0617-00997-1 will be occulted by a 52 km asteroid (1135) Colchis. This update is based on USNO/Flagstaff and Ondrejov astrometry for the asteroid and UCAC2 star position.

The updated path shows ~4 path width north shift with time ~0.2 minutes later compared to Edwin Goffin's nominal prediction.

Updated path runs due to north shift over Russia 23:40-23:46 UT, Belarus ~23:46.5 UT, Lithuania ~23:46.9 UT, N Poland ~23:48.0 UT, N Germany ~23:49.5 UT, N Netherlands ~23:50.4 UT, England ~23:51.7 UT and S Ireland ~23:53.0 UT. Please check the path chart for details.

Clear sky and good luck !!!

The event at one glimpse: * date and approx. UT time of event: September 12, 2003 @ 23:50 UT (Europe) * magnitude of target star: 11.8 * magnitude drop [mag]: 2.1 * estimated maximum duration [s]: 9.4 * path description: given above * Goffin's original chart reference: A03_0967 The occultation path: * approximate ground width [km]: 70 * uncertainty [path widths]: 1.3 * uncertainty in time [s]: 13 * 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 0617-00997-1 * constellation: Pisces * J2000 position [h,m,s; o,',"]: 01h 23m 56.2010s; +11o 23' 21.569" * position source: UCAC2 * estimated accuracy ["]: 0.03" (0.02", 0.02") * V mag [mag]: 11.80 * B-V [mag]: +0.56 * remarks: Target star is in east Pisces, about 4.3 degrees southwest of 3.6 mag star eta Piscii = SAO 92484 or 15' east of 6.8 mag star SAO 92407. !!! 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: (1135) Colchis approx. diameter [km]: 52 * orbital information orbit source: calculation Manek source of used astrometry: USNO/Flagstaff (Ron Stone), Ondrejov (P.Kusnirak, J.Manek) number of used observations: 98 USNO, 3 Ondrejov number of rejected observations: 25 USNO time covered by the observations: 1998 05 18 - 2003 09 07 rms residuals ["] (RA,DE): 0.10", 0.09" estimated positional accuracy at epoch of event ["]: 0.06", 0.06" remarks: Data for the event: * UT date and time of least geocentric approach: 23:45.5 UT * approx. V mag of minor planet at event [mag]: 13.7 * geocentric parallax of minor planet ["]: 5.999 * magnitude drop [mag]: 2.1 * estimated maximum duration [s]: 9.4 * apparent motion of minor planet ["/h]: 18.78 * angular distance to moon, phase of moon [deg,%]: 9, 95% * remarks: Elements for WinOccult: ============ cut here =========================================== 2003 Sep 12 1135 Colchis 23h 45.5m UT 11.8 1 23 56.201 11 23 21.57TYC 0617-00997-1 12.4 13.7 52 9.4 1.466 -1.278 -0.25 -326.966 11.391 -177.32 4.04 23.7589 -.00834 .68292 -3.12856 -0.04115 -0.00277 -0.00131 2000 11.49749252003 9 8.000002.939231 351.0595204.548848 0.115391682.665862012.3582437010.25 0.15 RATE 2.2643709 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 ============ cut here =========================================== Calculator(s): Jan Manek

Updated path location for (1135) Colchis on September 12/13, 2003

Updated path location for (1135) Colchis on September 12/13, 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 Latitude Latitude Latitude Latitude ...................................... shortened ............................................. o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " 72 0 0 53 17 20 23 38 26 39 230 -10 53 36 49 52 57 57 54 27 36 52 8 24 71 0 0 53 22 29 23 38 36 39 228 -10 53 41 58 53 3 6 54 32 44 52 13 34 70 0 0 53 27 29 23 38 46 39 227 -11 53 46 58 53 8 7 54 37 42 52 18 36 69 0 0 53 32 21 23 38 57 40 226 -11 53 51 48 53 12 59 54 42 32 52 23 29 68 0 0 53 37 3 23 39 7 40 225 -12 53 56 30 53 17 42 54 47 12 52 28 13 67 0 0 53 41 36 23 39 17 41 224 -12 54 1 3 53 22 15 54 51 44 52 32 48 66 0 0 53 46 1 23 39 27 41 223 -13 54 5 27 53 26 40 54 56 7 52 37 14 65 0 0 53 50 16 23 39 38 41 221 -13 54 9 43 53 30 56 55 0 21 52 41 31 64 0 0 53 54 23 23 39 48 42 220 -14 54 13 49 53 35 4 55 4 26 52 45 40 63 0 0 53 58 21 23 39 59 42 219 -14 54 17 46 53 39 2 55 8 22 52 49 39 62 0 0 54 2 9 23 40 9 42 218 -15 54 21 34 53 42 51 55 12 9 52 53 29 61 0 0 54 5 49 23 40 20 42 217 -15 54 25 14 53 46 31 55 15 48 52 57 10 60 0 0 54 9 20 23 40 30 43 215 -16 54 28 44 53 50 2 55 19 17 53 0 42 59 0 0 54 12 42 23 40 41 43 214 -16 54 32 6 53 53 24 55 22 38 53 4 5 58 0 0 54 15 55 23 40 51 43 213 -17 54 35 18 53 56 37 55 25 49 53 7 19 57 0 0 54 18 58 23 41 2 43 212 -17 54 38 21 53 59 41 55 28 52 53 10 24 56 0 0 54 21 53 23 41 13 44 210 -17 54 41 16 54 2 36 55 31 45 53 13 20 55 0 0 54 24 39 23 41 23 44 209 -18 54 44 1 54 5 22 55 34 30 53 16 6 54 0 0 54 27 16 23 41 34 44 208 -18 54 46 38 54 8 0 55 37 6 53 18 44 53 0 0 54 29 43 23 41 45 44 207 -19 54 49 5 54 10 28 55 39 32 53 21 13 52 0 0 54 32 2 23 41 56 45 205 -19 54 51 24 54 12 47 55 41 50 53 23 32 51 0 0 54 34 12 23 42 6 45 204 -20 54 53 33 54 14 57 55 43 59 53 25 43 50 0 0 54 36 13 23 42 17 45 203 -20 54 55 34 54 16 57 55 45 59 53 27 44 49 0 0 54 38 4 23 42 28 45 201 -20 54 57 25 54 18 49 55 47 50 53 29 37 48 0 0 54 39 47 23 42 39 45 200 -21 54 59 8 54 20 32 55 49 32 53 31 20 47 0 0 54 41 21 23 42 50 46 199 -21 55 0 41 54 22 6 55 51 5 53 32 55 46 0 0 54 42 45 23 43 1 46 197 -22 55 2 6 54 23 31 55 52 29 53 34 20 45 0 0 54 44 1 23 43 12 46 196 -22 55 3 21 54 24 47 55 53 44 53 35 36 44 0 0 54 45 8 23 43 23 46 195 -22 55 4 28 54 25 54 55 54 50 53 36 43 43 0 0 54 46 5 23 43 34 46 193 -23 55 5 25 54 26 51 55 55 48 53 37 41 42 0 0 54 46 54 23 43 45 46 192 -23 55 6 14 54 27 40 55 56 36 53 38 30 41 0 0 54 47 34 23 43 56 46 191 -23 55 6 53 54 28 20 55 57 15 53 39 10 40 0 0 54 48 4 23 44 7 46 189 -24 55 7 24 54 28 50 55 57 46 53 39 40 39 0 0 54 48 26 23 44 18 46 188 -24 55 7 46 54 29 12 55 58 7 53 40 2 38 0 0 54 48 38 23 44 29 46 187 -24 55 7 58 54 29 24 55 58 20 53 40 15 37 0 0 54 48 42 23 44 40 47 185 -25 55 8 2 54 29 28 55 58 23 53 40 18 36 0 0 54 48 36 23 44 51 47 184 -25 55 7 56 54 29 22 55 58 18 53 40 13 35 0 0 54 48 22 23 45 2 47 183 -25 55 7 42 54 29 8 55 58 3 53 39 58 34 0 0 54 47 58 23 45 13 47 181 -26 55 7 18 54 28 44 55 57 40 53 39 34 33 0 0 54 47 26 23 45 24 47 180 -26 55 6 46 54 28 12 55 57 8 53 39 1 32 0 0 54 46 44 23 45 35 47 178 -26 55 6 4 54 27 30 55 56 27 53 38 20 31 0 0 54 45 54 23 45 46 47 177 -27 55 5 14 54 26 39 55 55 37 53 37 29 30 0 0 54 44 54 23 45 57 47 176 -27 55 4 15 54 25 40 55 54 37 53 36 29 29 0 0 54 43 46 23 46 8 47 174 -27 55 3 6 54 24 31 55 53 30 53 35 20 28 0 0 54 42 28 23 46 19 47 173 -28 55 1 49 54 23 13 55 52 13 53 34 2 27 0 0 54 41 2 23 46 30 47 172 -28 55 0 22 54 21 47 55 50 47 53 32 35 26 0 0 54 39 26 23 46 41 46 170 -28 54 58 47 54 20 11 55 49 12 53 30 58 25 0 0 54 37 42 23 46 52 46 169 -28 54 57 3 54 18 26 55 47 28 53 29 13 24 0 0 54 35 48 23 47 4 46 168 -29 54 55 10 54 16 33 55 45 36 53 27 19 23 0 0 54 33 46 23 47 15 46 166 -29 54 53 7 54 14 30 55 43 34 53 25 15 22 0 0 54 31 34 23 47 26 46 165 -29 54 50 56 54 12 18 55 41 23 53 23 3 21 0 0 54 29 14 23 47 37 46 163 -30 54 48 36 54 9 57 55 39 4 53 20 42 20 0 0 54 26 44 23 47 48 46 162 -30 54 46 7 54 7 28 55 36 36 53 18 11 19 0 0 54 24 6 23 47 59 46 161 -30 54 43 29 54 4 49 55 33 58 53 15 32 18 0 0 54 21 18 23 48 10 46 159 -30 54 40 42 54 2 1 55 31 12 53 12 43 17 0 0 54 18 22 23 48 21 45 158 -30 54 37 46 53 59 5 55 28 17 53 9 46 16 0 0 54 15 17 23 48 32 45 157 -31 54 34 41 53 55 59 55 25 13 53 6 39 15 0 0 54 12 3 23 48 43 45 156 -31 54 31 27 53 52 44 55 22 0 53 3 24 14 0 0 54 8 39 23 48 54 45 154 -31 54 28 4 53 49 21 55 18 38 52 59 59 13 0 0 54 5 7 23 49 5 45 153 -31 54 24 32 53 45 48 55 15 8 52 56 26 12 0 0 54 1 26 23 49 16 45 152 -31 54 20 52 53 42 7 55 11 28 52 52 44 11 0 0 53 57 36 23 49 27 44 150 -32 54 17 2 53 38 17 55 7 40 52 48 52 10 0 0 53 53 38 23 49 38 44 149 -32 54 13 4 53 34 17 55 3 43 52 44 52 9 0 0 53 49 30 23 49 49 44 148 -32 54 8 57 53 30 9 54 59 36 52 40 43 8 0 0 53 45 13 23 49 59 44 147 -32 54 4 40 53 25 52 54 55 21 52 36 24 7 0 0 53 40 48 23 50 10 43 145 -32 54 0 15 53 21 26 54 50 58 52 31 57 6 0 0 53 36 13 23 50 21 43 144 -32 53 55 41 53 16 51 54 46 25 52 27 21 5 0 0 53 31 30 23 50 32 43 143 -32 53 50 59 53 12 8 54 41 43 52 22 36 4 0 0 53 26 38 23 50 43 43 142 -33 53 46 7 53 7 15 54 36 53 52 17 43 3 0 0 53 21 37 23 50 53 42 140 -33 53 41 7 53 2 14 54 31 54 52 12 40 2 0 0 53 16 27 23 51 4 42 139 -33 53 35 57 52 57 3 54 26 46 52 7 29 1 0 0 53 11 9 23 51 15 42 138 -33 53 30 39 52 51 44 54 21 30 52 2 8 0 0 0 53 5 41 23 51 25 41 137 -33 53 25 13 52 46 17 54 16 4 51 56 39 - 1 0 0 53 0 5 23 51 36 41 136 -33 53 19 37 52 40 40 54 10 30 51 51 1 - 2 0 0 52 54 21 23 51 46 41 134 -33 53 13 53 52 34 55 54 4 47 51 45 15 - 3 0 0 52 48 27 23 51 57 40 133 -33 53 8 0 52 29 1 53 58 56 51 39 20 - 4 0 0 52 42 25 23 52 7 40 132 -33 53 1 58 52 22 58 53 52 56 51 33 16 - 5 0 0 52 36 14 23 52 18 40 131 -33 52 55 48 52 16 47 53 46 47 51 27 3 - 6 0 0 52 29 55 23 52 28 39 130 -33 52 49 29 52 10 27 53 40 30 51 20 42 - 7 0 0 52 23 27 23 52 39 39 129 -33 52 43 2 52 3 58 53 34 4 51 14 12 - 8 0 0 52 16 51 23 52 49 38 128 -33 52 36 26 51 57 21 53 27 29 51 7 33 - 9 0 0 52 10 5 23 52 59 38 126 -33 52 29 42 51 50 36 53 20 46 51 0 47 - 10 0 0 52 3 12 23 53 9 38 125 -33 52 22 49 51 43 42 53 13 55 50 53 51 - 11 0 0 51 56 10 23 53 19 37 124 -33 52 15 47 51 36 39 53 6 55 50 46 47 - 12 0 0 51 49 0 23 53 29 37 123 -33 52 8 37 51 29 28 52 59 46 50 39 35 - 13 0 0 51 41 41 23 53 39 36 122 -33 52 1 19 51 22 9 52 52 30 50 32 14 - 14 0 0 51 34 14 23 53 49 36 121 -33 51 53 52 51 14 41 52 45 5 50 24 45 - 15 0 0 51 26 38 23 53 59 35 120 -33 51 46 18 51 7 5 52 37 31 50 17 8 - 16 0 0 51 18 55 23 54 9 35 119 -33 51 38 34 50 59 21 52 29 50 50 9 22 - 17 0 0 51 11 3 23 54 18 34 118 -33 51 30 43 50 51 29 52 22 0 50 1 29 - 18 0 0 51 3 3 23 54 28 34 117 -33 51 22 44 50 43 28 52 14 2 49 53 27 - 19 0 0 50 54 55 23 54 38 34 116 -33 51 14 36 50 35 20 52 5 56 49 45 17 - 20 0 0 50 46 39 23 54 47 33 115 -33 51 6 21 50 27 3 51 57 42 49 36 59 - 21 0 0 50 38 15 23 54 56 33 114 -32 50 57 57 50 18 39 51 49 20 49 28 33 - 22 0 0 50 29 43 23 55 6 32 113 -32 50 49 26 50 10 6 51 40 50 49 20 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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