IOTA/IOTA-ES occultation update for (279) Thule / UCAC4-493-002261 event on 2022 Feb 12, 00:57 UT Visible from South America Summary ------- On 2022 Feb 12 UT, the 126.3 km diameter asteroid (279) Thule will occult a 12.4 mag star in the constellation Pisces for observers along a path across South America. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.28 mag to 15.64 mag (the magnitude of the asteroid) for at most 4.460 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: 2022 Feb 12, 00:55 - 2022 Feb 12, 01:00 * geocentric midpoint of event [JD]: 2459622.54029167 * magnitude of target star: 12.41 * magnitude drop [mag]: 3.28 * estimated maximum duration [s]: 4.460 * Moon: 80 % sunlit, 65° distance * Sun: 62° distance * rough path description: South America The occultation path -------------------- * approximate projected width [km]: 182 * 1 sigma uncertainty interval [path widths]: +/- 0.10 * 1 sigma uncertainty interval [seconds]: +/- 1.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.011, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.012", 0.004", 70°) * approx speed of asteroid's shadow [km/s]: 28.3101 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4-493-002261 by 279 Thule on 2022 Feb 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 160 0 0 -68 9 53 0 55 25.2 0 66 35 .. .. .. -67 16 36 .. .. .. -67 6 21 .... 161 0 0 -67 59 56 0 55 25.2 1 65 35 -68 54 24 -67 6 27 -69 5 7 -66 56 9 0.40 162 0 0 -67 49 41 0 55 25.2 1 64 36 -68 44 22 -66 55 59 -68 55 7 -66 45 39 0.67 163 0 0 -67 39 7 0 55 25.3 1 64 36 -68 34 1 -66 45 13 -68 44 49 -66 34 50 0.78 164 0 0 -67 28 13 0 55 25.3 2 63 36 -68 23 21 -66 34 7 -68 34 11 -66 23 42 0.84 165 0 0 -67 17 1 0 55 25.4 2 62 36 -68 12 22 -66 22 41 -68 23 15 -66 12 14 0.88 166 0 0 -67 5 28 0 55 25.5 3 61 37 -68 1 3 -66 10 56 -68 11 59 -66 0 27 0.90 167 0 0 -66 53 36 0 55 25.7 3 60 37 -67 49 25 -65 58 51 -68 0 24 -65 48 19 0.92 168 0 0 -66 41 24 0 55 25.8 4 59 37 -67 37 26 -65 46 25 -67 48 28 -65 35 51 0.94 169 0 0 -66 28 51 0 55 26.0 4 58 37 -67 25 7 -65 33 39 -67 36 12 -65 23 2 0.95 170 0 0 -66 15 57 0 55 26.2 4 57 38 -67 12 28 -65 20 32 -67 23 35 -65 9 53 0.96 171 0 0 -66 2 43 0 55 26.4 5 56 38 -66 59 27 -65 7 4 -67 10 38 -64 56 22 0.96 172 0 0 -65 49 7 0 55 26.6 5 55 38 -66 46 6 -64 53 15 -66 57 19 -64 42 30 0.97 173 0 0 -65 35 9 0 55 26.9 6 54 38 -66 32 22 -64 39 3 -66 43 38 -64 28 16 0.97 174 0 0 -65 20 49 0 55 27.2 6 53 38 -66 18 17 -64 24 30 -66 29 36 -64 13 41 0.98 175 0 0 -65 6 7 0 55 27.5 7 52 39 -66 3 49 -64 9 35 -66 15 11 -63 58 43 0.98 176 0 0 -64 51 3 0 55 27.8 7 52 39 -65 48 59 -63 54 17 -66 0 24 -63 43 22 0.99 177 0 0 -64 35 36 0 55 28.2 8 51 39 -65 33 46 -63 38 36 -65 45 14 -63 27 39 0.99 178 0 0 -64 19 46 0 55 28.6 8 50 39 -65 18 10 -63 22 33 -65 29 41 -63 11 33 0.99 179 0 0 -64 3 32 0 55 29.0 9 49 39 -65 2 11 -63 6 6 -65 13 44 -62 55 4 0.99 -180 0 0 -63 46 55 0 55 29.5 9 48 39 -64 45 48 -62 49 16 -64 57 24 -62 38 11 1.00 -179 0 0 -63 29 54 0 55 30.0 10 47 40 -64 29 1 -62 32 2 -64 40 40 -62 20 55 1.00 -178 0 0 -63 12 30 0 55 30.5 10 46 40 -64 11 50 -62 14 24 -64 23 32 -62 3 15 1.00 -177 0 0 -62 54 41 0 55 31.1 11 45 40 -63 54 15 -61 56 23 -64 5 59 -61 45 11 1.00 -176 0 0 -62 36 28 0 55 31.7 11 44 40 -63 36 15 -61 37 57 -63 48 2 -61 26 43 1.00 -175 0 0 -62 17 50 0 55 32.3 12 43 40 -63 17 51 -61 19 7 -63 29 41 -61 7 51 1.00 -174 0 0 -61 58 48 0 55 33.0 13 42 40 -62 59 1 -60 59 53 -63 10 54 -60 48 34 1.01 -173 0 0 -61 39 21 0 55 33.7 13 42 41 -62 39 47 -60 40 14 -62 51 42 -60 28 53 1.01 -172 0 0 -61 19 29 0 55 34.5 14 41 41 -62 20 7 -60 20 11 -62 32 5 -60 8 47 1.01 -171 0 0 -60 59 12 0 55 35.3 14 40 41 -62 0 3 -59 59 43 -62 12 3 -59 48 17 1.01 -170 0 0 -60 38 31 0 55 36.2 15 39 41 -61 39 33 -59 38 50 -61 51 35 -59 27 23 1.01 -169 0 0 -60 17 24 0 55 37.1 15 38 41 -61 18 37 -59 17 33 -61 30 42 -59 6 3 1.01 -168 0 0 -59 55 52 0 55 38.0 16 37 41 -60 57 16 -58 55 51 -61 9 23 -58 44 20 1.01 -167 0 0 -59 33 55 0 55 39.0 17 36 41 -60 35 30 -58 33 44 -60 47 39 -58 22 11 1.01 -166 0 0 -59 11 34 0 55 40.1 17 35 41 -60 13 18 -58 11 14 -60 25 29 -57 59 39 1.01 -165 0 0 -58 48 47 0 55 41.2 18 34 41 -59 50 41 -57 48 18 -60 2 54 -57 36 42 1.02 -164 0 0 -58 25 36 0 55 42.3 18 33 41 -59 27 39 -57 24 59 -59 39 54 -57 13 21 1.02 -163 0 0 -58 2 1 0 55 43.5 19 32 41 -59 4 12 -57 1 16 -59 16 28 -56 49 36 1.02 -162 0 0 -57 38 1 0 55 44.8 20 31 41 -58 40 20 -56 37 8 -58 52 38 -56 25 28 1.02 -161 0 0 -57 13 37 0 55 46.1 20 30 41 -58 16 4 -56 12 38 -58 28 23 -56 0 56 1.02 -160 0 0 -56 48 50 0 55 47.5 21 29 41 -57 51 23 -55 47 44 -58 3 44 -55 36 1 1.02 -159 0 0 -56 23 39 0 55 48.9 22 29 41 -57 26 18 -55 22 28 -57 38 40 -55 10 43 1.02 -158 0 0 -55 58 5 0 55 50.4 22 28 41 -57 0 50 -54 56 49 -57 13 13 -54 45 3 1.02 -157 0 0 -55 32 9 0 55 51.9 23 27 41 -56 34 58 -54 30 48 -56 47 22 -54 19 1 1.02 -156 0 0 -55 5 50 0 55 53.5 23 26 41 -56 8 44 -54 4 25 -56 21 9 -53 52 38 1.02 -155 0 0 -54 39 10 0 55 55.2 24 25 41 -55 42 7 -53 37 42 -55 54 33 -53 25 54 1.02 -154 0 0 -54 12 9 0 55 57.0 25 24 41 -55 15 9 -53 10 38 -55 27 35 -52 58 50 1.02 -153 0 0 -53 44 47 0 55 58.8 25 23 40 -54 47 49 -52 43 14 -55 0 16 -52 31 26 1.02 -152 0 0 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-40 0 58 1.04 -127 0 0 -40 40 37 0 57 8.5 41 353 29 -41 40 52 -39 41 40 -41 52 45 -39 30 20 1.04 -126 0 0 -40 9 53 0 57 11.9 41 351 28 -41 9 55 -39 11 8 -41 21 45 -38 59 51 1.04 -125 0 0 -39 39 17 0 57 15.4 41 350 27 -40 39 6 -38 40 44 -40 50 54 -38 29 29 1.04 -124 0 0 -39 8 51 0 57 18.9 42 348 27 -40 8 26 -38 10 30 -40 20 11 -37 59 18 1.04 -123 0 0 -38 38 35 0 57 22.5 42 347 26 -39 37 57 -37 40 27 -39 49 38 -37 29 17 1.04 -122 0 0 -38 8 30 0 57 26.1 42 345 25 -39 7 38 -37 10 35 -39 19 17 -36 59 27 1.04 -121 0 0 -37 38 38 0 57 29.7 43 344 24 -38 37 32 -36 40 56 -38 49 9 -36 29 51 1.04 -120 0 0 -37 9 0 0 57 33.4 43 343 23 -38 7 40 -36 11 31 -38 19 14 -36 0 29 1.04 -119 0 0 -36 39 37 0 57 37.0 43 341 23 -37 38 3 -35 42 21 -37 49 34 -35 31 21 1.04 -118 0 0 -36 10 29 0 57 40.7 43 340 22 -37 8 41 -35 13 27 -37 20 9 -35 2 30 1.04 -117 0 0 -35 41 39 0 57 44.5 43 338 21 -36 39 36 -34 44 50 -36 51 1 -34 33 55 1.04 -116 0 0 -35 13 6 0 57 48.2 44 337 20 -36 10 49 -34 16 31 -36 22 11 -34 5 38 1.04 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35 36 0 58 37.0 42 318 8 -30 30 19 -28 41 52 -30 41 5 -28 31 31 1.05 -102 0 0 -29 12 40 0 58 40.7 42 317 7 -30 7 10 -28 19 7 -30 17 53 -28 8 49 1.05 -101 0 0 -28 50 13 0 58 44.3 42 315 6 -29 44 30 -27 56 52 -29 55 10 -27 46 36 1.05 -100 0 0 -28 28 15 0 58 47.9 41 314 5 -29 22 20 -27 35 6 -29 32 58 -27 24 53 1.05 - 99 0 0 -28 6 48 0 58 51.5 41 313 5 -29 0 40 -27 13 51 -29 11 16 -27 3 39 1.05 - 98 0 0 -27 45 51 0 58 55.1 40 312 4 -28 39 31 -26 53 5 -28 50 5 -26 42 55 1.05 - 97 0 0 -27 25 25 0 58 58.6 40 310 3 -28 18 54 -26 32 50 -28 29 25 -26 22 43 1.05 - 96 0 0 -27 5 30 0 59 2.1 39 309 2 -27 58 48 -26 13 7 -28 9 17 -26 3 1 1.05 - 95 0 0 -26 46 8 0 59 5.5 39 308 1 -27 39 14 -25 53 55 -27 49 41 -25 43 52 1.05 - 94 0 0 -26 27 18 0 59 8.9 38 307 0 -27 20 13 -25 35 15 -27 30 37 -25 25 14 1.06 - 93 0 0 -26 9 0 0 59 12.3 38 306 -1 -27 1 45 -25 17 7 -27 12 7 -25 7 8 1.06 - 92 0 0 -25 51 15 0 59 15.6 37 305 -2 -26 43 50 -24 59 32 -26 54 10 -24 49 35 1.06 - 91 0 0 -25 34 4 0 59 18.9 37 304 -3 -26 26 28 -24 42 31 -26 36 46 -24 32 35 1.06 - 90 0 0 -25 17 26 0 59 22.1 36 303 -4 -26 9 41 -24 26 2 -26 19 57 -24 16 8 1.06 - 89 0 0 -25 1 22 0 59 25.3 35 302 -5 -25 53 27 -24 10 7 -26 3 41 -24 0 14 1.06 - 88 0 0 -24 45 52 0 59 28.4 35 301 -6 -25 37 48 -23 54 45 -25 48 0 -23 44 54 1.06 - 87 0 0 -24 30 56 0 59 31.5 34 300 -7 -25 22 43 -23 39 58 -25 32 54 -23 30 9 1.06 - 86 0 0 -24 16 34 0 59 34.5 33 299 -8 -25 8 14 -23 25 45 -25 18 22 -23 15 57 1.06 - 85 0 0 -24 2 48 0 59 37.5 33 299 -9 -24 54 19 -23 12 6 -25 4 26 -23 2 20 1.06 - 84 0 0 -23 49 36 0 59 40.4 32 298 -10 -24 40 59 -22 59 2 -24 51 5 -22 49 17 1.06 - 83 0 0 -23 36 59 0 59 43.2 31 297 -11 -24 28 15 -22 46 32 -24 38 19 -22 36 49 1.06 - 82 0 0 -23 24 58 0 59 46.0 31 296 -12 -24 16 7 -22 34 38 -24 26 9 -22 24 55 1.06 - 81 0 0 -23 13 32 0 59 48.7 30 295 -13 -24 4 34 -22 23 18 -24 14 35 -22 13 37 1.06 - 80 0 0 -23 2 42 0 59 51.3 29 295 -14 -23 53 37 -22 12 34 -24 3 37 -22 2 54 1.06 - 79 0 0 -22 52 27 0 59 53.9 28 294 -14 -23 43 16 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-22 36 5 -20 37 29 1.07 - 66 0 0 -21 33 49 1 0 21.0 17 287 -26 -22 23 49 -20 44 34 -22 33 38 -20 35 5 1.07 - 65 0 0 -21 32 0 1 0 22.5 16 286 -27 -22 21 58 -20 42 46 -22 31 46 -20 33 17 1.07 - 64 0 0 -21 30 46 1 0 24.0 16 286 -28 -22 20 44 -20 41 34 -22 30 32 -20 32 5 1.07 - 63 0 0 -21 30 9 1 0 25.4 15 285 -28 -22 20 6 -20 40 57 -22 29 54 -20 31 28 1.07 - 62 0 0 -21 30 8 1 0 26.7 14 285 -29 -22 20 4 -20 40 57 -22 29 52 -20 31 28 1.08 - 61 0 0 -21 30 43 1 0 27.9 13 285 -30 -22 20 39 -20 41 32 -22 30 28 -20 32 3 1.08 - 60 0 0 -21 31 55 1 0 29.0 12 284 -31 -22 21 51 -20 42 43 -22 31 39 -20 33 14 1.08 - 59 0 0 -21 33 42 1 0 30.1 11 284 -32 -22 23 39 -20 44 29 -22 33 27 -20 35 0 1.08 - 58 0 0 -21 36 5 1 0 31.1 10 283 -32 -22 26 3 -20 46 52 -22 35 52 -20 37 22 1.09 - 57 0 0 -21 39 4 1 0 31.9 9 283 -33 -22 29 4 -20 49 50 -22 38 53 -20 40 20 1.09 - 56 0 0 -21 42 39 1 0 32.7 8 283 -34 -22 32 41 -20 53 23 -22 42 30 -20 43 53 1.10 - 55 0 0 -21 46 50 1 0 33.5 7 282 -35 -22 36 53 -20 57 32 -22 46 43 -20 48 1 1.10 - 54 0 0 -21 51 37 1 0 34.1 6 282 -35 -22 41 42 -21 2 16 -22 51 32 -20 52 45 1.11 - 53 0 0 -21 56 59 1 0 34.6 5 281 -36 -22 47 7 -21 7 35 -22 56 58 -20 58 4 1.12 - 52 0 0 -22 2 56 1 0 35.1 5 281 -37 -22 53 8 -21 13 30 -23 2 59 -21 3 58 1.14 - 51 0 0 -22 9 29 1 0 35.5 4 281 -37 -22 59 44 -21 20 0 -23 9 36 -21 10 27 1.16 - 50 0 0 -22 16 37 1 0 35.8 3 280 -38 -23 6 56 -21 27 4 -23 16 49 -21 17 31 1.20 - 49 0 0 -22 24 21 1 0 36.0 2 280 -39 -23 14 43 -21 34 44 -23 24 37 -21 25 10 1.28 - 48 0 0 -22 32 39 1 0 36.1 1 280 -39 -23 23 6 -21 42 58 -23 33 1 -21 33 24 1.56 Uncertainty in time = +/- 1 secs Prediction of 2021 Dec 15.0 Data for the target star ------------------------ * name: UCAC4-493-002261 * constellation : Pisces * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 01 33 26.2999 DE: +08 25 50.531 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 01 33 26.2999 DE: +08 25 50.530 * position source: Gaia EDR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 12.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (279) Thule asteroid class: approx. diameter [km]: 126 approx. diameter ["]: 0.038 distance from Earth [AU]: 4.54620 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#64 date of fit: 2021 Nov 10 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): 0.012", 0.004", 69.956° remarks: * orbital elements for (279)Thule : Mean anomaly = 302.4771133028 deg Arg. of pericenter = 26.7325811392 deg Long. of node = 71.8801839641 deg Inclination = 2.3347044363 deg Eccentricity = 0.0437155450 Semimajor axis = 4.2652074594 AU Perihelion dist = 4.0787515908 AU Mag: H = 8.52, G = 0.15 Epoch of elements : MJD 59622.04013889 TDT (2022 Feb 12.0401) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#642021Nov10,4.46,2022,2,12,0.9670,0.290638,-0.660301,14.664723,6.346217,0.005003,0.001890,-0.000001,0.000000 -132.9248,8.5418,169.05,-13.76,False UCAC4-493-002261,1.55730554,8.4307030,0.00,12.41,0.00,0.0,0,,1.57627997,8.5417789,3.28,0.00,0,0,0 279,Thule,15.64,126.3,4.5462,0,0,1.913,12.28,,9.0 0,302.3607,2022,2,11,26.7326,71.8802,2.3347,0.04372,4.26521,4.07875,8.52,5.0,0.15 1.097,0.0117,0.0037,70,0.0037,Known errors,-1.00,-1,-1,-1 20220212_002261,59563.00 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2021 Dec 15, 04:13 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org