Update for (674) Rachele - December 10/11, 2003

Update computed by Jan Manek; issued 04 Dec 2003 22:53 +0100 (CET)

Jan Manek's update

                  IOTA/IOTA-ES occultation update for
             (674) Rachele / TAC +03 00515 on December 10/11, 2003
             visible from South Africa, Algeria, NE Spain, France,
                        Belgium, Netherlands and Norway


Summary

In the night of December 10/11, 2003 a faint 11.0 mag star TAC +03 00515 will be occulted by a 95 km asteroid (674) Rachele. This update is based on USNO/Flagstaff astrometry for the asteroid and UCAC2 star position.

The updated path shows ~6 path width westh shift with time 0.7 minutes earlier compared to Edwin Goffin's nominal prediction.

Updated path runs due to west shift over South Africa around 21:40 UT, Algeria ~21:58 UT, NE Spain with Barcelona in path ~21:59.5 UT, France from south to north around 22:00.6 UT, Belgium ~22:01.5 UT with Brussels in path, W Netherlands ~22:02.0 UT and Norway ~22:03.0 UT and later. Please check the path chart for details.

Magnitude and color of target star is given according to TAC catalogue. However there is suspicion that it may be fainter and therefore magnitude drop may be smaller going possibly even beyond possibilities if visual observers. GSC gives approximately V magnitude as 12.71 mag. Star is not known as variable star. Visual inspection is desired.

Here is current station list for observers and European cities.

Clear sky and good luck !!!

The event at one glimpse: * date and approx. UT time of event: December 10, 2003 @ 22:00 UT (Europe) * magnitude of target star: 11.5 * magnitude drop [mag]: 0.9 * estimated maximum duration [s]: 16.4 * path description: given above * Goffin's original chart reference: A03_1231 The occultation path: * approximate ground width [km]: 120 * uncertainty [path widths]: 0.85 * uncertainty in time [s]: 14 * map: below * remarks: Path uncertainties are given according to nominal star position errors and expected asteroid positional accuracy. Data for the target star: * name: TAC +03 00515 = GSC 0024-00378 * constellation: Pisces * J2000 position [h,m,s; o,',"]: 01h 29m 36.0548s; +03o 16' 46.089" * position source: UCAC2 * estimated accuracy ["]: 0.04" (0.02", 0.03") * V mag [mag]: 11.48 * B-V [mag]: +1.15 * remarks: Target star is in south Pisces, about 2.9 degree south of 4.8 mag star mi Piscii = SAO 144670. !!! 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 3 degrees blowup to show correctly the star in field.

Data for the minor planet: * general information: number, name: (674) Rachele approx. diameter [km]: 101 * orbital information orbit source: calculation Manek source of used astrometry: USNO/Flagstaff (Ron Stone) number of used observations: 112 USNO number of rejected observations: 13 USNO time covered by the observations: 1998 09 13 - 2003 11 22 rms residuals ["] (RA,DE): 0.07", 0.08" estimated positional accuracy at epoch of event ["]: 0.06", 0.05" remarks: Data for the event: * UT date and time of least geocentric approach: 21:51.0 UT * approx. V mag of minor planet at event [mag]: 11.8 * geocentric parallax of minor planet ["]: 4.624 * magnitude drop [mag]: 0.9 * estimated maximum duration [s]: 16.4 * apparent motion of minor planet ["/h]: 16.12 * angular distance to moon, phase of moon [deg,%]: 79, 96% * remarks: Elements for WinOccult: ============ cut here =========================================== 2003 Dec 10 674 Rachele 21h 51.0m UT 11.5 1 29 36.055 3 16 46.09TAC +03 00515 12.6 11.8 101 16.4 1.902 -0.307 15.45 -24.554 3.275 210.47 -22.93 21.8495 .50470 .15118 -0.99758 3.34085 0.00440 0.00209 2000 316.423401200312 7.0000042.213403 58.282508 13.496636 0.190118742.926315202.369967837.425 0.15 RATE 1.9688940 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 ============ cut here =========================================== Calculator(s): Jan Manek

Updated path location for (674) Rachele on December 10/11, 2003

Updated path location for (674) Rachele on December 10/11, 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 ' " Longitude Longitude Longitude Longitude 39 21 26 -34 0 0 21 37 52 22 290 -33 40 30 39 38 14 28 42 29 48 36 28 57 37 38 22 -33 0 0 21 38 6 24 291 -34 38 43 30 36 35 6 40 34 57 34 54 58 36 2 57 -32 0 0 21 38 20 25 292 -35 37 4 41 35 2 48 38 49 49 33 27 15 34 34 3 -31 0 0 21 38 35 27 292 -36 35 32 55 33 36 33 37 12 46 32 4 58 33 10 48 -30 0 0 21 38 49 28 292 -37 34 7 12 32 15 37 35 42 33 30 47 29 31 52 32 -29 0 0 21 39 4 30 293 -38 32 46 45 30 59 22 34 18 13 29 34 17 30 38 38 -28 0 0 21 39 20 31 293 -39 31 30 58 29 47 16 32 59 2 28 24 53 29 28 41 -27 0 0 21 39 35 32 293 -40 30 19 20 28 38 54 31 44 24 27 18 57 28 22 16 -26 0 0 21 39 51 33 293 -41 29 11 25 27 33 54 30 33 49 26 16 9 27 19 4 -25 0 0 21 40 7 35 293 -42 28 6 51 26 31 59 29 26 53 25 16 12 26 18 47 -24 0 0 21 40 23 36 293 -43 27 5 21 25 32 52 28 23 14 24 18 53 25 21 10 -23 0 0 21 40 39 37 293 -44 26 6 38 24 36 19 27 22 35 23 23 58 24 26 2 -22 0 0 21 40 55 38 293 -44 25 10 29 23 42 9 26 24 40 22 31 18 23 33 11 -21 0 0 21 41 12 39 293 -45 24 16 42 22 50 10 25 29 17 21 40 42 ...................................... shortened ............................................. 2 25 13 34 0 0 21 57 28 49 227 -64 3 4 32 1 46 7 4 9 31 0 42 29 2 22 35 35 0 0 21 57 44 49 227 -64 3 2 23 1 43 2 4 8 9 0 38 38 2 20 51 36 0 0 21 58 0 48 226 -64 3 1 8 1 40 48 4 7 45 0 35 35 2 20 1 37 0 0 21 58 16 47 225 -63 3 0 50 1 39 26 4 8 21 0 33 23 2 20 8 38 0 0 21 58 31 47 224 -63 3 1 32 1 39 0 4 9 59 0 32 2 2 21 15 39 0 0 21 58 46 46 224 -63 3 3 14 1 39 31 4 12 42 0 31 36 2 23 24 40 0 0 21 59 1 45 223 -62 3 6 2 1 41 3 4 16 33 0 32 7 2 26 39 41 0 0 21 59 16 44 223 -62 3 9 57 1 43 37 4 21 37 0 33 38 2 31 3 42 0 0 21 59 31 43 222 -61 3 15 4 1 47 19 4 27 56 0 36 11 2 36 39 43 0 0 21 59 46 43 222 -61 3 21 26 1 52 10 4 35 35 0 39 50 2 43 32 44 0 0 22 0 0 42 221 -60 3 29 8 1 58 15 4 44 39 0 44 38 2 51 47 45 0 0 22 0 14 41 221 -60 3 38 15 2 5 39 4 55 12 0 50 40 3 1 28 46 0 0 22 0 28 40 221 -59 3 48 51 2 14 25 5 7 22 0 57 59 3 12 41 47 0 0 22 0 42 39 220 -59 4 1 3 2 24 41 5 21 13 1 6 42 3 25 32 48 0 0 22 0 55 38 220 -58 4 14 57 2 36 30 5 36 53 1 16 52 3 40 9 49 0 0 22 1 8 37 220 -58 4 30 41 2 50 0 5 54 31 1 28 37 3 56 38 50 0 0 22 1 21 36 220 -57 4 48 23 3 5 19 6 14 15 1 42 3 4 15 9 51 0 0 22 1 34 36 220 -56 5 8 11 3 22 35 6 36 14 1 57 18 4 35 51 52 0 0 22 1 47 35 220 -56 5 30 17 3 41 56 7 0 42 2 14 29 4 58 56 53 0 0 22 1 59 34 220 -55 5 54 52 4 3 33 7 27 49 2 33 47 5 24 36 54 0 0 22 2 11 33 220 -55 6 22 9 4 27 38 7 57 52 2 55 22 5 53 5 55 0 0 22 2 23 32 220 -54 6 52 24 4 54 25 8 31 6 3 19 26 6 24 40 56 0 0 22 2 34 31 220 -53 7 25 53 5 24 8 9 7 51 3 46 14 Latitude Latitude Latitude Latitude 7 0 0 57 0 34 22 2 46 30 221 -53 55 14 10 58 39 44 51 58 23 61 10 11 8 0 0 58 30 57 22 3 2 28 221 -52 56 55 27 60 1 9 54 4 3 62 19 44 9 0 0 59 49 10 22 3 16 27 222 -51 58 21 51 61 12 24 55 47 40 63 21 28 10 0 0 60 58 0 22 3 28 26 223 -50 59 37 7 62 15 36 57 15 56 64 16 48 11 0 0 61 59 19 22 3 38 25 223 -49 60 43 40 63 12 16 58 32 44 65 6 50 12 0 0 62 54 28 22 3 47 24 224 -49 61 43 11 64 3 29 59 40 36 65 52 22 13 0 0 63 44 27 22 3 55 23 225 -48 62 36 52 64 50 5 60 41 15 66 34 2 14 0 0 64 30 2 22 4 2 22 226 -48 63 25 38 65 32 44 61 35 57 67 12 20 15 0 0 65 11 49 22 4 9 21 227 -47 64 10 14 66 11 57 62 25 40 67 47 41 16 0 0 65 50 18 22 4 15 20 228 -46 64 51 10 66 48 8 63 11 5 68 20 25 17 0 0 66 25 53 22 4 20 20 228 -46 65 28 57 67 21 40 63 52 48 68 50 51 18 0 0 66 58 53 22 4 25 19 229 -46 66 3 54 67 52 48 64 31 17 69 19 11 19 0 0 67 29 34 22 4 29 18 230 -45 66 36 22 68 21 49 65 6 54 69 45 38 20 0 0 67 58 10 22 4 33 18 231 -45 67 6 35 68 48 54 65 39 58 70 10 22 21 0 0 68 24 55 22 4 37 17 232 -44 67 34 47 69 14 14 66 10 45 70 33 34 22 0 0 68 49 56 22 4 40 17 233 -44 68 1 10 69 37 59 66 39 28 70 55 20 23 0 0 69 13 24 22 4 43 16 234 -44 68 25 52 70 0 17 67 6 20 71 15 47 24 0 0 69 35 27 22 4 46 16 235 -43 68 49 2 70 21 14 67 31 30 71 35 3 25 0 0 69 56 10 22 4 49 15 236 -43 69 10 49 70 40 56 67 55 6 71 53 11 26 0 0 70 15 41 22 4 52 15 237 -43 69 31 18 70 59 31 68 17 16 72 10 18 27 0 0 70 34 4 22 4 54 14 238 -42 69 50 35 71 17 1 68 38 7 72 26 27 28 0 0 70 51 24 22 4 56 14 239 -42 70 8 46 71 33 33 68 57 45 72 41 42 29 0 0 71 7 45 22 4 58 13 239 -42 70 25 55 71 49 9 69 16 15 72 56 6 30 0 0 71 23 12 22 5 0 13 240 -41 70 42 6 72 3 53 69 33 42 73 9 44 31 0 0 71 37 48 22 5 2 13 241 -41 70 57 22 72 17 49 69 50 9 73 22 36 32 0 0 71 51 35 22 5 4 12 242 -41 71 11 48 72 30 59 70 5 40 73 34 48 33 0 0 72 4 37 22 5 6 12 243 -41 71 25 26 72 43 25 70 20 20 73 46 19 34 0 0 72 16 55 22 5 7 11 244 -40 71 38 18 72 55 11 70 34 10 73 57 13 35 0 0 72 28 34 22 5 9 11 245 -40 71 50 28 73 6 19 70 47 14 74 7 32 36 0 0 72 39 33 22 5 10 11 246 -40 72 1 58 73 16 50 70 59 35 74 17 17 ...................................... 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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