Update for (218) Bianca - November 13/14, 2003

Update computed by Jan Manek; issued 11 Nov 2003 23:46 +0100 (CET)

Jan Manek's update

                  IOTA/IOTA-ES occultation update for
         (218) Bianca / TYC 0099-00113-1 on November 13/14, 2003
    visible from Slovenia, N Italy, S France, NW Spain and Costarica


Summary

In the night of November 13/14, 2003 a faint 11.3 mag star TYC 0099-00113-1 will be occulted by a 62 km asteroid (218) Bianca. This update is based on USNO/Flagstaff astrometry for the asteroid and UCAC2 star position.

The updated path shows ~1.5 path width south shift with time ~0.6 minute later earlier compared to Edwin Goffin's nominal prediction.

Updated path runs due to south shift over Slovenia ~5:39.5 UT in strong morning twilight, N Italy ~5:39.7 UT, S France around 5:39.9 UT, NW Spain around 5:40.4 UT and finally Costarica ~5:50.0 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: November 14, 2003 @ 05:39 UT (Europe) * magnitude of target star: 11.3 * magnitude drop [mag]: 2.0 * estimated maximum duration [s]: 5.2 * path description: given above * Goffin's original chart reference: A03_1119 The occultation path: * approximate ground width [km]: 65 * uncertainty [path widths]: 1.6 * uncertainty in time [s]: 9 * 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 0099-00113-1 * constellation: Orion * J2000 position [h,m,s; o,',"]: 05h 12m 56.0754s; +01o 29' 19.126" * position source: UCAC2 * estimated accuracy ["]: 0.03" (0.02", 0.02") * V mag [mag]: 11.27 * B-V [mag]: +0.98 * remarks: Target star is in middle Orion, about 5.1 degrees west of 2.4 mag star delta Orionis = SAO 132220. !!! 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: (218) Bianca approx. diameter [km]: 62 * orbital information orbit source: calculation Manek source of used astrometry: USNO/Flagstaff (Ron Stone) number of used observations: 131 USNO number of rejected observations: 15 USNO time covered by the observations: 1998 08 26 - 2003 11 07 rms residuals ["] (RA,DE): 0.07", 0.07" estimated positional accuracy at epoch of event ["]: 0.06", 0.06" remarks: Data for the event: * UT date and time of least geocentric approach: 05:47.8 UT * approx. V mag of minor planet at event [mag]: 13.1 * geocentric parallax of minor planet ["]: 4.220 * magnitude drop [mag]: 2.0 * estimated maximum duration [s]: 5.2 * apparent motion of minor planet ["/h]: 28.55 * angular distance to moon, phase of moon [deg,%]: 40, 78% * remarks: Elements for WinOccult: ============ cut here =========================================== 2003 Nov 14 218 Bianca 5h 47.8m UT 11.3 5 12 56.075 1 29 19.13TYC 0099-00113-1 12.3 13.1 62 5.2 2.084 -1.676 -13.57 -61.632 1.493 89.15 -18.12 5.7960 -.14444 .26755 -5.95228 -3.21759 -0.00277 0.00170 2000 199.615728200311 7.0000061.203101 170.89820015.230752 0.117645572.665491782.351908488.605 0.32 RATE 2.2648430 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 ============ cut here =========================================== Calculator(s): Jan Manek

Updated path location for (218) Bianca on November 13/14, 2003

Updated path location for (218) Bianca on November 13/14, 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 15 0 0 45 52 4 5 39 32 12 260 -4 46 9 48 45 34 22 47 5 17 44 39 21 14 0 0 45 47 16 5 39 33 13 259 -4 46 5 1 45 29 33 47 0 34 44 34 28 13 0 0 45 42 6 5 39 35 13 258 -5 45 59 52 45 24 22 46 55 29 44 29 13 12 0 0 45 36 34 5 39 36 14 258 -6 45 54 21 45 18 49 46 50 2 44 23 36 11 0 0 45 30 40 5 39 38 15 257 -6 45 48 28 45 12 53 46 44 13 44 17 36 10 0 0 45 24 24 5 39 40 15 256 -7 45 42 14 45 6 36 46 38 3 44 11 15 9 0 0 45 17 46 5 39 42 16 256 -7 45 35 37 44 59 56 46 31 31 44 4 31 8 0 0 45 10 45 5 39 43 17 255 -8 45 28 38 44 52 54 46 24 37 43 57 24 7 0 0 45 3 23 5 39 46 17 254 -9 45 21 17 44 45 30 46 17 21 43 49 55 6 0 0 44 55 38 5 39 48 18 253 -9 45 13 34 44 37 43 46 9 43 43 42 3 5 0 0 44 47 30 5 39 50 19 253 -10 45 5 28 44 29 34 46 1 43 43 33 49 4 0 0 44 39 1 5 39 52 20 252 -11 44 57 0 44 21 3 45 53 21 43 25 11 3 0 0 44 30 8 5 39 55 20 251 -11 44 48 10 44 12 9 45 44 36 43 16 11 2 0 0 44 20 53 5 39 57 21 250 -12 44 38 56 44 2 52 45 35 29 43 6 49 1 0 0 44 11 15 5 40 0 22 250 -13 44 29 21 43 53 12 45 25 59 42 57 3 0 0 0 44 1 15 5 40 2 22 249 -13 44 19 22 43 43 9 45 16 7 42 46 54 - 1 0 0 43 50 51 5 40 5 23 248 -14 44 9 1 43 32 44 45 5 53 42 36 22 - 2 0 0 43 40 5 5 40 8 24 248 -15 43 58 17 43 21 55 44 55 15 42 25 27 - 3 0 0 43 28 56 5 40 11 25 247 -15 43 47 10 43 10 44 44 44 15 42 14 9 - 4 0 0 43 17 23 5 40 14 25 246 -16 43 35 39 42 59 9 44 32 52 42 2 27 - 5 0 0 43 5 28 5 40 17 26 245 -17 43 23 46 42 47 11 44 21 6 41 50 22 - 6 0 0 42 53 9 5 40 20 27 245 -17 43 11 29 42 34 50 44 8 57 41 37 54 - 7 0 0 42 40 26 5 40 24 28 244 -18 42 58 49 42 22 5 43 56 24 41 25 2 - 8 0 0 42 27 21 5 40 27 28 243 -19 42 45 46 42 8 57 43 43 29 41 11 46 - 9 0 0 42 13 52 5 40 31 29 242 -19 42 32 19 41 55 26 43 30 10 40 58 7 - 10 0 0 41 59 59 5 40 35 30 242 -20 42 18 29 41 41 30 43 16 27 40 44 4 - 11 0 0 41 45 42 5 40 38 31 241 -21 42 4 15 41 27 11 43 2 21 40 29 38 - 12 0 0 41 31 2 5 40 42 31 240 -21 41 49 38 41 12 29 42 47 52 40 14 47 - 13 0 0 41 15 59 5 40 46 32 240 -22 41 34 37 40 57 22 42 32 59 39 59 33 ...................................... shortened ............................................. - 65 0 0 19 53 13 5 46 54 71 169 -66 20 13 26 19 33 3 21 16 46 18 30 24 - 66 0 0 19 21 43 5 47 4 72 165 -67 19 41 56 19 1 34 20 45 16 17 58 56 - 67 0 0 18 50 9 5 47 14 72 162 -67 19 10 21 18 30 0 20 13 40 17 27 23 - 68 0 0 18 18 32 5 47 23 72 158 -68 18 38 43 17 58 23 19 42 0 16 55 48 - 69 0 0 17 46 51 5 47 33 72 155 -69 18 7 2 17 26 43 19 10 17 16 24 10 - 70 0 0 17 15 9 5 47 43 72 151 -70 17 35 19 16 55 1 18 38 32 15 52 30 - 71 0 0 16 43 26 5 47 53 72 148 -71 17 3 35 16 23 19 18 6 45 15 20 50 - 72 0 0 16 11 42 5 48 3 72 144 -72 16 31 50 15 51 36 17 34 58 14 49 10 - 73 0 0 15 39 59 5 48 12 72 141 -73 16 0 6 15 19 54 17 3 11 14 17 31 - 74 0 0 15 8 17 5 48 22 72 137 -73 15 28 24 14 48 14 16 31 25 13 45 53 - 75 0 0 14 36 38 5 48 32 72 134 -74 14 56 43 14 16 35 15 59 41 13 14 19 - 76 0 0 14 5 2 5 48 42 71 130 -75 14 25 6 13 45 1 15 27 59 12 42 48 - 77 0 0 13 33 30 5 48 52 71 127 -76 13 53 32 13 13 30 14 56 22 12 11 21 - 78 0 0 13 2 3 5 49 2 70 124 -76 13 22 4 12 42 4 14 24 48 11 40 0 - 79 0 0 12 30 41 5 49 11 70 122 -77 12 50 41 12 10 44 13 53 20 11 8 44 - 80 0 0 11 59 26 5 49 21 69 119 -77 12 19 24 11 39 30 13 21 59 10 37 35 - 81 0 0 11 28 18 5 49 31 69 116 -78 11 48 14 11 8 24 12 50 44 10 6 34 - 82 0 0 10 57 18 5 49 41 68 114 -78 11 17 13 10 37 26 12 19 37 9 35 41 - 83 0 0 10 26 27 5 49 50 67 112 -79 10 46 20 10 6 37 11 48 38 9 4 58 - 84 0 0 9 55 46 5 50 0 67 110 -79 10 15 37 9 35 57 11 17 49 8 34 24 - 85 0 0 9 25 15 5 50 10 66 108 -79 9 45 4 9 5 28 10 47 10 8 4 1 - 86 0 0 8 54 55 5 50 19 65 106 -79 9 14 42 8 35 11 10 16 42 7 33 49 - 87 0 0 8 24 48 5 50 29 64 104 -79 8 44 33 8 5 5 9 46 26 7 3 50 - 88 0 0 7 54 53 5 50 38 64 103 -79 8 14 36 7 35 12 9 16 22 6 34 4 ...................................... 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-| --------------------------------------------------------------------U---U---

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