Update for (152) Atala - November 4/5, 2003

Update computed by Jan Manek; issued 02 Nov 2003 14:48 +0100 (CET)

Jan Manek's update

                  IOTA/IOTA-ES occultation update for
           (152) Atala / TYC 1223-00074-1 on November 4/5, 2003
visible from Middle East, Tunisia, N Algeria, N Morocco, Bahamas and Mexico


Summary

In the night of November 4/5, 2003 a faint 10.2 mag star TYC 1223-00074-1 will be occulted by a 71 km asteroid (152) Atala. This update is based on USNO/Flagstaff astrometry for the asteroid and UCAC2 star position.

The updated path shows ~2 path width north shift with time ~1.5 minutes earlier compared to Edwin Goffin's nominal prediction.

Updated path runs due to north shift over Middle East ~0:28 UT, Tunisia ~0:31.4 UT, N Algeria ~0:32.0 UT, N Morocco ~0:33.0 UT and later Bahamas 0:40.2 UT and Mexico 0:41.1 UT. Please check the path chart for details.

Target star is the southern star in a wide pair, other component about the same brightness and ~47" north.
Clear sky and good luck !!!

The event at one glimpse: * date and approx. UT time of event: November 5, 2003 @ 00:33 UT (Europe) * magnitude of target star: 10.2 * magnitude drop [mag]: 2.2 * estimated maximum duration [s]: 5.3 * path description: given above * Goffin's original chart reference: A03_1110 The occultation path: * approximate ground width [km]: 75 * uncertainty [path widths]: 1.3 * uncertainty in time [s]: 7 * 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 1223-00074-1 * constellation: Aries * J2000 position [h,m,s; o,',"]: 02h 41m 08.6623s; +16o 31' 53.566" * position source: UCAC2 * estimated accuracy ["]: 0.03" (0.02", 0.02") * V mag [mag]: 10.17 * B-V [mag]: +0.57 * remarks: Target star is in middle Aries, about 6.5 degrees north of 4.3 mag star mu Ceti = SAO 110723. Target star is the southern star in a wide pair, other component about the same brightness and ~47" north. !!! 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: (152) Atala approx. diameter [km]: 71 * orbital information orbit source: calculation Manek source of used astrometry: USNO/Flagstaff (Ron Stone) number of used observations: 100 USNO number of rejected observations: 20 USNO time covered by the observations: 1998 10 10 - 2003 10 15 rms residuals ["] (RA,DE): 0.09", 0.10" estimated positional accuracy at epoch of event ["]: 0.06", 0.06" remarks: Data for the event: * UT date and time of least geocentric approach: 20:33.7 UT * approx. V mag of minor planet at event [mag]: 12.3 * geocentric parallax of minor planet ["]: 4.382 * magnitude drop [mag]: 2.2 * estimated maximum duration [s]: 5.3 * apparent motion of minor planet ["/h]: 33.07 * angular distance to moon, phase of moon [deg,%]: 45, 86% * remarks: Elements for WinOccult: ============ cut here =========================================== 2003 Nov 05 152 Atala 0h 33.7m UT 10.2 2 41 8.662 16 31 53.57TYC 1223-00074-1 10.6 12.3 71 5.3 2.007 -2.299 -0.95 -11.987 16.532 167.47 -15.49 0.5622 -.00905 .31757 -7.54338 -0.21546 -0.00004 -0.00010 2000 311.65657120031028.0000055.891682 40.124646 12.132878 0.071085013.141806352.918471028.335 0.12 RATE 1.7698440 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 ============ cut here =========================================== Calculator(s): Jan Manek

Updated path location for (152) Atala on November 4/5, 2003

Updated path location for (152) Atala on November 4/5, 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 76 0 0 22 20 59 0 26 19 10 284 -9 22 42 12 21 59 49 23 36 18 21 6 14 74 0 0 22 55 23 0 26 22 12 283 -11 23 16 35 22 34 14 24 10 39 21 40 41 72 0 0 23 29 20 0 26 26 14 282 -13 23 50 31 23 8 12 24 44 32 22 14 42 70 0 0 24 2 48 0 26 30 15 282 -14 24 23 57 23 41 40 25 17 55 22 48 13 68 0 0 24 35 43 0 26 35 17 281 -16 24 56 52 24 14 37 25 50 46 23 21 13 66 0 0 25 8 5 0 26 40 19 280 -18 25 29 12 24 47 0 26 23 3 23 53 40 64 0 0 25 39 51 0 26 45 21 279 -20 26 0 56 25 18 47 26 54 44 24 25 30 62 0 0 26 10 58 0 26 52 23 278 -22 26 32 2 25 49 57 27 25 46 24 56 43 60 0 0 26 41 26 0 26 58 25 277 -24 27 2 29 26 20 26 27 56 8 25 27 17 58 0 0 27 11 12 0 27 5 26 276 -26 27 32 13 26 50 14 28 25 48 25 57 9 56 0 0 27 40 15 0 27 12 28 275 -27 28 1 14 27 19 18 28 54 44 26 26 18 54 0 0 28 8 33 0 27 20 30 274 -29 28 29 30 27 47 38 29 22 56 26 54 42 52 0 0 28 36 5 0 27 28 32 273 -31 28 57 0 28 15 12 29 50 21 27 22 21 50 0 0 29 2 49 0 27 37 33 271 -33 29 23 43 28 41 58 30 16 59 27 49 11 48 0 0 29 28 44 0 27 45 35 270 -34 29 49 36 29 7 55 30 42 47 28 15 14 46 0 0 29 53 50 0 27 54 37 269 -36 30 14 40 29 33 3 31 7 46 28 40 26 44 0 0 30 18 5 0 28 4 39 268 -38 30 38 53 29 57 19 31 31 54 29 4 47 42 0 0 30 41 28 0 28 14 40 266 -39 31 2 13 30 20 44 31 55 10 29 28 17 40 0 0 31 3 58 0 28 23 42 265 -41 31 24 42 30 43 16 32 17 33 29 50 54 38 0 0 31 25 34 0 28 34 44 263 -43 31 46 16 31 4 55 32 39 3 30 12 37 36 0 0 31 46 17 0 28 44 45 262 -44 32 6 57 31 25 39 32 59 39 30 33 26 34 0 0 32 6 5 0 28 55 47 260 -46 32 26 43 31 45 29 33 19 20 30 53 20 32 0 0 32 24 57 0 29 6 48 258 -47 32 45 33 32 4 23 33 38 6 31 12 19 30 0 0 32 42 53 0 29 17 50 257 -49 33 3 28 32 22 21 33 55 56 31 30 22 28 0 0 32 59 53 0 29 28 51 255 -50 33 20 26 32 39 23 34 12 50 31 47 28 26 0 0 33 15 57 0 29 40 53 253 -52 33 36 28 32 55 28 34 28 47 32 3 37 24 0 0 33 31 3 0 29 51 54 251 -53 33 51 33 33 10 36 34 43 48 32 18 49 22 0 0 33 45 12 0 30 3 56 248 -55 34 5 40 33 24 46 34 57 52 32 33 3 20 0 0 33 58 23 0 30 15 57 246 -56 34 18 50 33 37 59 35 10 58 32 46 19 18 0 0 34 10 37 0 30 27 59 244 -57 34 31 2 33 50 14 35 23 6 32 58 37 16 0 0 34 21 52 0 30 40 60 241 -59 34 42 16 34 1 30 35 34 17 33 9 57 14 0 0 34 32 9 0 30 52 61 238 -60 34 52 32 34 11 48 35 44 30 33 20 18 12 0 0 34 41 28 0 31 4 62 235 -61 35 1 50 34 21 8 35 53 45 33 29 41 10 0 0 34 49 48 0 31 17 64 232 -62 35 10 9 34 29 29 36 2 2 33 38 4 8 0 0 34 57 10 0 31 30 65 228 -64 35 17 30 34 36 52 36 9 21 33 45 29 6 0 0 35 3 33 0 31 42 66 225 -65 35 23 53 34 43 16 36 15 41 33 51 54 4 0 0 35 8 57 0 31 55 67 221 -66 35 29 16 34 48 41 36 21 3 33 57 21 2 0 0 35 13 23 0 32 8 68 217 -67 35 33 41 34 53 7 36 25 27 34 1 48 0 0 0 35 16 49 0 32 21 69 212 -67 35 37 7 34 56 34 36 28 52 34 5 16 - 2 0 0 35 19 17 0 32 34 69 207 -68 35 39 35 34 59 2 36 31 19 34 7 45 - 4 0 0 35 20 46 0 32 47 70 202 -69 35 41 4 35 0 31 36 32 48 34 9 15 - 6 0 0 35 21 17 0 33 1 70 197 -69 35 41 34 35 1 1 36 33 18 34 9 45 - 8 0 0 35 20 48 0 33 14 71 191 -70 35 41 5 35 0 33 36 32 49 34 9 16 - 10 0 0 35 19 20 0 33 27 71 186 -70 35 39 38 34 59 5 36 31 22 34 7 48 - 12 0 0 35 16 54 0 33 40 71 180 -70 35 37 12 34 56 38 36 28 57 34 5 21 - 14 0 0 35 13 29 0 33 53 71 174 -70 35 33 48 34 53 13 36 25 34 34 1 54 - 16 0 0 35 9 5 0 34 7 71 168 -70 35 29 24 34 48 49 36 21 12 33 57 29 - 18 0 0 35 3 43 0 34 20 71 162 -70 35 24 3 34 43 26 36 15 52 33 52 4 ...................................... shortened ............................................. - 70 0 0 27 14 19 0 39 34 37 89 -37 27 35 19 26 53 21 28 28 53 26 0 17 - 72 0 0 26 44 46 0 39 43 35 88 -35 27 5 49 26 23 47 27 59 27 25 30 38 - 74 0 0 26 14 33 0 39 53 33 87 -33 26 35 36 25 53 31 27 29 19 25 0 19 - 76 0 0 25 43 40 0 40 1 31 86 -32 26 4 45 25 22 37 26 58 31 24 29 21 - 78 0 0 25 12 9 0 40 9 30 85 -30 25 33 16 24 51 5 26 27 6 23 57 45 - 80 0 0 24 40 3 0 40 17 28 84 -28 25 1 11 24 18 57 25 55 4 23 25 34 - 82 0 0 24 7 23 0 40 25 26 83 -26 24 28 32 23 46 16 25 22 29 22 52 50 - 84 0 0 23 34 11 0 40 32 24 82 -24 23 55 22 23 13 4 24 49 21 22 19 35 - 86 0 0 23 0 31 0 40 38 22 81 -22 23 21 42 22 39 22 24 15 44 21 45 51 - 88 0 0 22 26 24 0 40 44 20 80 -21 22 47 36 22 5 14 23 41 40 21 11 40 - 90 0 0 21 51 52 0 40 50 18 79 -19 22 13 5 21 30 41 23 7 11 20 37 6 - 92 0 0 21 16 58 0 40 55 17 78 -17 21 38 12 20 55 47 22 32 20 20 2 10 - 94 0 0 20 41 46 0 41 0 15 77 -15 21 3 0 20 20 34 21 57 9 19 26 56 - 96 0 0 20 6 17 0 41 4 13 77 -13 20 27 31 19 45 5 21 21 41 18 51 25 - 98 0 0 19 30 34 0 41 7 11 76 -11 19 51 49 19 9 22 20 45 59 18 15 42 -100 0 0 18 54 41 0 41 10 9 75 -9 19 15 56 18 33 29 20 10 6 17 39 49 -102 0 0 18 18 40 0 41 13 7 75 -7 18 39 55 17 57 28 19 34 5 17 3 48 -104 0 0 17 42 35 0 41 14 5 74 -5 18 3 49 17 21 23 18 57 59 16 27 43 ...................................... 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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