IOTA/IOTA-ES occultation update for (1633) Chimay / TYC 1308-00009-1 event on 2023 Nov 12, 07:08 UT Visible from E Canada, USA Summary ------- On 2023 Nov 12 UT, the 36.4 km diameter asteroid (1633) Chimay will occult a 11.0 mag star in the constellation Taurus for observers along a path across E Canada, USA. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.89 mag to 15.83 mag (the magnitude of the asteroid) for at most 3.730 seconds. This update is based on, astrometry for the asteroid kindly provided by the IAU Minor Planet Center. This work has made use of data from the European Space Agency (ESA) mission Gaia (http://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, http://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. The event at a glimpse ---------------------- * Rank: 100 * date and approx. time of event: 2023 Nov 12, 06:59 - 2023 Nov 12, 07:19 * geocentric midpoint of event [JD]: 2460260.79815675 * magnitude of target star: 10.95 * magnitude drop [mag]: 4.89 * estimated maximum duration [s]: 3.730 * Moon: 1 % sunlit, 136° distance * Sun: 148° distance * rough path description: E Canada, USA The occultation path -------------------- * approximate projected width [km]: 40 * 1 sigma uncertainty interval [path widths]: +/- 0.04 * 1 sigma uncertainty interval [seconds]: +/- 2.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.011, +/- 0.001) * 1 sigma uncertainty ellipse (major, minor, PA): (0.011", 0.001", 84°) * approx speed of asteroid's shadow [km/s]: 9.7573 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1308-00009-1 by 1633 Chimay on 2023 Nov 12 Centre Star Star Sun Path Limits Error Limits Alt E. Longitude Latitude U.T. Alt Az Alt Limit 1 Limit 2 Limit 3 Limit 4 Crn o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " Latitude Latitude Latitude Latitude 0 0 0 .. .. .... .. .. .. .. .. .. 19 47 4 .. .. .. 19 47 57 .. .. .. .... -177 0 0 19 58 32 7 19 14.4 1 68 -30 20 10 11 19 46 53 20 11 5 19 46 0 .... -176 0 0 20 21 43 7 19 14.1 2 69 -31 20 33 23 20 10 4 20 34 16 20 9 10 -0.40 -175 0 0 20 44 57 7 19 13.6 3 69 -32 20 56 38 20 33 18 20 57 31 20 32 24 -0.41 -174 0 0 21 8 14 7 19 12.8 4 69 -33 21 19 55 20 56 34 21 20 49 20 55 41 -0.42 -173 0 0 21 31 34 7 19 11.8 5 70 -34 21 43 15 21 19 53 21 44 9 21 19 0 -0.43 -172 0 0 21 54 55 7 19 10.6 6 70 -35 22 6 37 21 43 14 22 7 30 21 42 21 -0.43 -171 0 0 22 18 17 7 19 9.1 7 70 -36 22 29 59 22 6 36 22 30 53 22 5 43 -0.43 -170 0 0 22 41 40 7 19 7.5 8 71 -37 22 53 22 22 29 59 22 54 16 22 29 5 -0.43 -169 0 0 23 5 3 7 19 5.6 9 71 -38 23 16 45 22 53 21 23 17 39 22 52 28 -0.43 -168 0 0 23 28 25 7 19 3.6 10 72 -39 23 40 8 23 16 43 23 41 1 23 15 49 -0.43 -167 0 0 23 51 46 7 19 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-0.44 -141 0 0 33 24 19 7 17 3.1 35 86 -61 33 35 56 33 12 43 33 36 49 33 11 50 -0.45 -140 0 0 33 44 6 7 16 56.8 36 87 -61 33 55 43 33 32 31 33 56 36 33 31 38 -0.45 -139 0 0 34 3 40 7 16 50.4 36 88 -62 34 15 16 33 52 6 34 16 10 33 51 13 -0.45 -138 0 0 34 23 1 7 16 43.8 37 89 -62 34 34 37 34 11 27 34 35 30 34 10 34 -0.45 -137 0 0 34 42 9 7 16 37.2 38 90 -63 34 53 43 34 30 35 34 54 36 34 29 42 -0.45 -136 0 0 35 1 2 7 16 30.5 39 90 -63 35 12 36 34 49 29 35 13 29 34 48 36 -0.45 -135 0 0 35 19 41 7 16 23.7 40 91 -64 35 31 14 35 8 9 35 32 7 35 7 16 -0.45 -134 0 0 35 38 6 7 16 16.9 40 92 -64 35 49 39 35 26 35 35 50 31 35 25 42 -0.45 -133 0 0 35 56 16 7 16 10.0 41 93 -65 36 7 48 35 44 46 36 8 41 35 43 53 -0.45 -132 0 0 36 14 12 7 16 3.0 42 94 -65 36 25 43 36 2 42 36 26 36 36 1 50 -0.45 -131 0 0 36 31 53 7 15 55.9 43 95 -65 36 43 23 36 20 24 36 44 16 36 19 31 -0.45 -130 0 0 36 49 19 7 15 48.8 43 95 -66 37 0 48 36 37 50 37 1 40 36 36 58 -0.45 -129 0 0 37 6 29 7 15 41.6 44 96 -66 37 17 57 36 55 2 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39 41 14 39 18 35 39 42 6 39 17 43 -0.46 - 13 0 0 39 14 59 7 1 31.1 34 270 -6 39 26 21 39 3 39 39 27 13 39 2 47 -0.46 - 12 0 0 38 59 48 7 1 25.6 33 271 -5 39 11 10 38 48 27 39 12 2 38 47 35 -0.46 - 11 0 0 38 44 20 7 1 20.2 32 272 -5 38 55 43 38 32 58 38 56 36 38 32 6 -0.46 - 10 0 0 38 28 36 7 1 14.8 31 273 -4 38 40 0 38 17 13 38 40 52 38 16 21 -0.46 - 9 0 0 38 12 35 7 1 9.5 31 273 -3 38 24 0 38 1 11 38 24 52 38 0 19 -0.46 - 8 0 0 37 56 17 7 1 4.3 30 274 -2 38 7 43 37 44 52 38 8 35 37 44 0 -0.46 - 7 0 0 37 39 44 7 0 59.3 29 275 -1 37 51 10 37 28 18 37 52 3 37 27 26 -0.46 - 6 0 0 37 22 54 7 0 54.3 28 276 -1 37 34 21 37 11 27 37 35 14 37 10 35 -0.46 - 5 0 0 37 5 48 7 0 49.4 27 276 0 37 17 16 36 54 21 37 18 9 36 53 28 -0.46 - 4 0 0 36 48 26 7 0 44.6 27 277 1 36 59 55 36 36 58 37 0 48 36 36 5 -0.46 - 3 0 0 36 30 49 7 0 39.9 26 278 2 36 42 19 36 19 19 36 43 11 36 18 27 -0.46 - 2 0 0 36 12 55 7 0 35.4 25 278 3 36 24 26 36 1 26 36 25 19 36 0 33 -0.46 - 1 0 0 35 54 47 7 0 30.9 24 279 4 36 6 19 35 43 16 36 7 12 35 42 23 -0.46 0 0 0 35 36 23 7 0 26.6 23 280 4 35 47 56 35 24 52 35 48 49 35 23 59 -0.46 1 0 0 35 17 44 7 0 22.4 22 280 5 35 29 18 35 6 12 35 30 11 35 5 19 -0.46 2 0 0 34 58 50 7 0 18.3 22 281 6 35 10 25 34 47 17 35 11 18 34 46 25 -0.46 3 0 0 34 39 42 7 0 14.3 21 281 7 34 51 17 34 28 8 34 52 10 34 27 15 -0.46 4 0 0 34 20 19 7 0 10.5 20 282 8 34 31 55 34 8 45 34 32 48 34 7 52 -0.46 5 0 0 34 0 43 7 0 6.8 19 283 9 34 12 19 33 49 7 34 13 12 33 48 14 -0.46 6 0 0 33 40 52 7 0 3.3 18 283 10 33 52 29 33 29 16 33 53 22 33 28 23 -0.46 7 0 0 33 20 47 6 59 59.9 17 284 11 33 32 25 33 9 11 33 33 18 33 8 18 -0.46 8 0 0 33 0 29 6 59 56.6 16 284 11 33 12 8 32 48 52 33 13 1 32 47 59 -0.46 9 0 0 32 39 58 6 59 53.5 16 285 12 32 51 37 32 28 20 32 52 31 32 27 27 -0.47 10 0 0 32 19 15 6 59 50.5 15 286 13 32 30 54 32 7 36 32 31 48 32 6 43 -0.47 11 0 0 31 58 18 6 59 47.7 14 286 14 32 9 59 31 46 39 32 10 52 31 45 46 -0.47 12 0 0 31 37 10 6 59 45.1 13 287 15 31 48 51 31 25 30 31 49 44 31 24 37 -0.47 13 0 0 31 15 50 6 59 42.6 12 287 16 31 27 31 31 4 10 31 28 25 31 3 16 -0.47 14 0 0 30 54 18 6 59 40.3 11 288 17 31 6 0 30 42 38 31 6 54 30 41 44 -0.47 15 0 0 30 32 36 6 59 38.2 10 288 18 30 44 18 30 20 55 30 45 12 30 20 1 -0.48 16 0 0 30 10 43 6 59 36.2 9 289 19 30 22 25 29 59 1 30 23 19 29 58 8 -0.48 17 0 0 29 48 39 6 59 34.4 8 289 20 30 0 22 29 36 57 30 1 16 29 36 4 -0.49 18 0 0 29 26 26 6 59 32.8 7 290 20 29 38 9 29 14 43 29 39 3 29 13 50 -0.49 19 0 0 29 4 3 6 59 31.4 6 290 21 29 15 47 28 52 20 29 16 40 28 51 27 -0.50 20 0 0 28 41 31 6 59 30.2 5 291 22 28 53 15 28 29 48 28 54 9 28 28 55 -0.51 21 0 0 28 18 51 6 59 29.2 4 291 23 28 30 35 28 7 8 28 31 29 28 6 14 -0.52 22 0 0 27 56 3 6 59 28.3 3 292 24 28 7 47 27 44 19 28 8 41 27 43 26 -0.55 23 0 0 27 33 7 6 59 27.7 2 292 25 27 44 51 27 21 23 27 45 45 27 20 29 -0.59 24 0 0 27 10 4 6 59 27.2 2 293 26 27 21 48 26 58 20 27 22 42 26 57 26 -0.68 25 0 0 26 46 54 6 59 27.0 1 293 27 26 58 39 26 35 10 26 59 33 26 34 17 -1.09 Uncertainty in time = +/- 2 secs Prediction of 2023 Oct 15.9 Data for the target star ------------------------ * name: TYC 1308-00009-1 * constellation : Taurus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 05 21 34.8801 DE: +20 43 33.275 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 05 21 34.8802 DE: +20 43 33.275 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.0 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1633) Chimay asteroid class: approx. diameter [km]: 36 approx. diameter ["]: 0.021 distance from Earth [AU]: 2.42340 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#61 date of fit: 2023 Oct 09 source of used astrometry: MPC, JPL number of used observations: 0 number of rejected observations: 0 time covered by the observations: 1800 Jan 01 - 1800 Jan 01 1 sigma uncertainty ellipse (major, minor, PA): 0.011", 0.001", 83.793° remarks: * orbital elements for (1633)Chimay : Mean anomaly = 260.4584659345 deg Arg. of pericenter = 71.9805535927 deg Long. of node = 113.5075645281 deg Inclination = 2.6671320140 deg Eccentricity = 0.1286591908 Semimajor axis = 3.1889857399 AU Perihelion dist = 2.7786934151 AU Mag: H = 10.69, G = 0.15 Epoch of elements : MJD 60260.29784722 TDT (2023 Nov 12.2978) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#612023Oct09,3.73,2023,11,12,7.155762,-0.027239,0.415981,-5.495555,-0.359225,-0.003175,0.000013,0.000001,0.000000 -77.7451,20.7502,68.69,-17.64,False TYC 1308-00009-1,5.35968892,20.7259096,0.00,10.95,0.00,0.0,0,,5.38355346,20.7502362,4.89,0.00,0,0,0 1633,Chimay,15.83,36.400,2.4234,0,0,-1.422,-1.31,,2.2,0 0,260.4069,2023,11,12,71.9806,113.5076,2.6671,0.12866,3.18899,2.77869,10.70,5.0,0.15 1.038,0.0113,0.0006,84,0.0114,Known errors,-1.00,0,-1,-1 20231112_0009-1,60232.88 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Oct 15, 21:04 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org