IOTA/IOTA-ES occultation update for (284) Amalia / UCAC4 562-010178 event on 2024 Oct 12, 08:44 UT Visible from Summary ------- On 2024 Oct 12 UT, the 56.7475030731955 km diameter asteroid (284) Amalia will occult a 11.1 mag star in the constellation Taurus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 3.37 mag to 14.37 mag (the magnitude of the asteroid) for at most 11.700 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: 99 * date and approx. time of event: 2024 Oct 12, 08:28 - 2024 Oct 12, 08:59 * geocentric midpoint of event [JD]: 2460595.86400938 * magnitude of target star: 11.05 * magnitude drop [mag]: 3.37 * estimated maximum duration [s]: 11.700 * Moon: 67 % sunlit, 119° distance * Sun: 131° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 85 * 1 sigma uncertainty interval [path widths]: +/- 0.22 * 1 sigma uncertainty interval [seconds]: +/- 3.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.016, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.016", 0.002", 90°) * approx speed of asteroid's shadow [km/s]: 4.9268 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 562-010178 by 284 Amalia on 2024 Oct 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 -104 0 0 .. .. .... .. .. .. .. .. .. -66 19 28 .. .. .. -65 38 7 .. .. .. .... -103 0 0 -66 19 48 8 58 42.7 1 13 -12 -64 44 21 .. .. .. -64 5 23 .. .. .. .... -102 0 0 -64 39 20 8 58 41.1 3 12 -13 -63 10 1 -66 20 38 -62 33 12 -67 11 2 0.69 -101 0 0 -63 0 33 8 58 37.8 4 11 -14 -61 36 38 -64 34 13 -61 1 46 -65 20 1 0.87 -100 0 0 -61 23 29 8 58 32.8 6 10 -15 -60 4 21 -62 50 38 -59 31 15 -63 32 42 0.96 - 99 0 0 -59 48 7 8 58 26.4 8 9 -16 -58 33 16 -61 9 41 -58 1 46 -61 48 38 1.00 - 98 0 0 -58 14 28 8 58 18.5 9 8 -17 -57 3 27 -59 31 10 -56 33 25 -60 7 30 1.03 - 97 0 0 -56 42 33 8 58 9.2 11 7 -18 -55 34 59 -57 54 59 -55 6 16 -58 29 2 1.05 - 96 0 0 -55 12 21 8 57 58.5 12 6 -18 -54 7 53 -56 21 0 -53 40 24 -56 53 5 1.07 - 95 0 0 -53 43 51 8 57 46.7 14 6 -19 -52 42 13 -54 49 8 -52 15 51 -55 19 30 1.08 - 94 0 0 -52 17 4 8 57 33.6 15 5 -20 -51 18 0 -53 19 19 -50 52 39 -53 48 10 1.09 - 93 0 0 -50 51 57 8 57 19.5 17 4 -20 -49 55 14 -51 51 29 -49 30 50 -52 18 58 1.10 - 92 0 0 -49 28 31 8 57 4.3 18 3 -21 -48 33 56 -50 25 35 -48 10 24 -50 51 51 1.11 - 91 0 0 -48 6 44 8 56 48.2 20 2 -21 -47 14 8 -49 1 33 -46 51 24 -49 26 43 1.11 - 90 0 0 -46 46 35 8 56 31.2 21 1 -21 -45 55 48 -47 39 22 -45 33 49 -48 3 31 1.11 - 89 0 0 -45 28 3 8 56 13.3 22 0 -22 -44 38 57 -46 18 57 -44 17 39 -46 42 13 1.12 - 88 0 0 -44 11 7 8 55 54.6 24 359 -22 -43 23 34 -45 0 17 -43 2 55 -45 22 43 1.12 - 87 0 0 -42 55 45 8 55 35.2 25 358 -22 -42 9 39 -43 43 21 -41 49 36 -44 5 1 1.12 - 86 0 0 -41 41 57 8 55 15.2 26 357 -22 -40 57 11 -42 28 4 -40 37 41 -42 49 2 1.12 - 85 0 0 -40 29 41 8 54 54.5 27 356 -22 -39 46 10 -41 14 27 -39 27 12 -41 34 46 1.12 - 84 0 0 -39 18 56 8 54 33.2 28 355 -22 -38 36 35 -40 2 26 -38 18 6 -40 22 9 1.12 - 83 0 0 -38 9 41 8 54 11.5 29 354 -22 -37 28 25 -38 52 0 -37 10 23 -39 11 10 1.12 - 82 0 0 -37 1 54 8 53 49.3 31 353 -22 -36 21 39 -37 43 7 -36 4 3 -38 1 46 1.12 - 81 0 0 -35 55 34 8 53 26.6 32 352 -22 -35 16 17 -36 35 46 -34 59 5 -36 53 56 1.12 - 80 0 0 -34 50 40 8 53 3.6 32 351 -22 -34 12 17 -35 29 54 -33 55 28 -35 47 38 1.12 - 79 0 0 -33 47 12 8 52 40.2 33 350 -22 -33 9 39 -34 25 32 -32 53 12 -34 42 50 1.12 - 78 0 0 -32 45 7 8 52 16.5 34 349 -21 -32 8 22 -33 22 36 -31 52 15 -33 39 30 1.12 - 77 0 0 -31 44 25 8 51 52.6 35 348 -21 -31 8 25 -32 21 6 -30 52 37 -32 37 38 1.12 - 76 0 0 -30 45 4 8 51 28.4 36 347 -21 -30 9 46 -31 21 0 -29 54 17 -31 37 11 1.12 - 75 0 0 -29 47 4 8 51 4.1 37 346 -20 -29 12 26 -30 22 17 -28 57 14 -30 38 9 1.11 - 74 0 0 -28 50 23 8 50 39.5 37 344 -20 -28 16 23 -29 24 56 -28 1 27 -29 40 30 1.11 - 73 0 0 -27 55 0 8 50 14.9 38 343 -20 -27 21 36 -28 28 56 -27 6 56 -28 44 12 1.11 - 72 0 0 -27 0 55 8 49 50.1 39 342 -19 -26 28 5 -27 34 15 -26 13 40 -27 49 14 1.11 - 71 0 0 -26 8 5 8 49 25.2 39 341 -19 -25 35 48 -26 40 52 -25 21 37 -26 55 35 1.11 - 70 0 0 -25 16 31 8 49 0.3 40 339 -18 -24 44 45 -25 48 45 -24 30 46 -26 3 14 1.11 - 69 0 0 -24 26 11 8 48 35.3 40 338 -18 -23 54 54 -24 57 55 -23 41 8 -25 12 10 1.10 - 68 0 0 -23 37 5 8 48 10.4 41 337 -17 -23 6 16 -24 8 20 -22 52 42 -24 22 21 1.10 - 67 0 0 -22 49 12 8 47 45.4 41 336 -17 -22 18 49 -23 19 59 -22 5 26 -23 33 48 1.10 - 66 0 0 -22 2 30 8 47 20.5 41 334 -16 -21 32 32 -22 32 51 -21 19 20 -22 46 28 1.10 - 65 0 0 -21 16 59 8 46 55.7 42 333 -15 -20 47 25 -21 46 55 -20 34 24 -22 0 21 1.10 - 64 0 0 -20 32 39 8 46 30.9 42 332 -15 -20 3 28 -21 2 11 -19 50 36 -21 15 26 1.09 - 63 0 0 -19 49 27 8 46 6.2 42 330 -14 -19 20 38 -20 18 37 -19 7 56 -20 31 41 1.09 - 62 0 0 -19 7 24 8 45 41.6 42 329 -13 -18 38 55 -19 36 12 -18 26 22 -19 49 6 1.09 - 61 0 0 -18 26 28 8 45 17.1 43 328 -13 -17 58 19 -18 54 56 -17 45 54 -19 7 41 1.09 - 60 0 0 -17 46 39 8 44 52.8 43 327 -12 -17 18 49 -18 14 47 -17 6 32 -18 27 24 1.09 - 59 0 0 -17 7 56 8 44 28.6 43 325 -11 -16 40 24 -17 35 46 -16 28 15 -17 48 14 1.09 - 58 0 0 -16 30 19 8 44 4.6 43 324 -11 -16 3 4 -16 57 51 -15 51 3 -17 10 11 1.08 - 57 0 0 -15 53 47 8 43 40.7 43 323 -10 -15 26 48 -16 21 2 -15 14 54 -16 33 14 1.08 - 56 0 0 -15 18 18 8 43 17.1 43 322 -9 -14 51 35 -15 45 17 -14 39 48 -15 57 22 1.08 - 55 0 0 -14 43 53 8 42 53.6 42 320 -8 -14 17 25 -15 10 37 -14 5 45 -15 22 35 1.08 - 54 0 0 -14 10 31 8 42 30.3 42 319 -8 -13 44 18 -14 37 0 -13 32 43 -14 48 51 1.08 - 53 0 0 -13 38 12 8 42 7.3 42 318 -7 -13 12 12 -14 4 27 -13 0 43 -14 16 11 1.08 - 52 0 0 -13 6 54 8 41 44.5 42 317 -6 -12 41 7 -13 32 56 -12 29 44 -13 44 34 1.08 - 51 0 0 -12 36 37 8 41 21.9 42 316 -5 -12 11 3 -13 2 26 -11 59 45 -13 13 59 1.08 - 50 0 0 -12 7 22 8 40 59.6 41 315 -5 -11 41 58 -12 32 58 -11 30 46 -12 44 26 1.07 - 49 0 0 -11 39 6 8 40 37.5 41 314 -4 -11 13 54 -12 4 31 -11 2 46 -12 15 53 1.07 - 48 0 0 -11 11 50 8 40 15.7 41 313 -3 -10 46 48 -11 37 4 -10 35 45 -11 48 21 1.07 - 47 0 0 -10 45 33 8 39 54.1 40 312 -2 -10 20 42 -11 10 37 -10 9 43 -11 21 49 1.07 - 46 0 0 -10 20 15 8 39 32.8 40 311 -1 - 9 55 34 -10 45 9 - 9 44 39 -10 56 17 1.07 - 45 0 0 - 9 55 56 8 39 11.8 40 310 0 - 9 31 23 -10 20 40 - 9 20 33 -10 31 44 1.07 - 44 0 0 - 9 32 34 8 38 51.0 39 309 0 - 9 8 11 - 9 57 10 - 8 57 24 -10 8 10 1.07 - 43 0 0 - 9 10 11 8 38 30.6 39 308 1 - 8 45 55 - 9 34 38 - 8 35 12 - 9 45 34 1.07 - 42 0 0 - 8 48 44 8 38 10.5 38 308 2 - 8 24 36 - 9 13 4 - 8 13 57 - 9 23 56 1.07 - 41 0 0 - 8 28 15 8 37 50.6 38 307 3 - 8 4 14 - 8 52 27 - 7 53 38 - 9 3 16 1.07 - 40 0 0 - 8 8 43 8 37 31.1 37 306 4 - 7 44 49 - 8 32 48 - 7 34 15 - 8 43 33 1.07 - 39 0 0 - 7 50 7 8 37 11.8 37 305 5 - 7 26 19 - 8 14 5 - 7 15 48 - 8 24 48 1.07 - 38 0 0 - 7 32 27 8 36 52.9 36 305 6 - 7 8 46 - 7 56 19 - 6 58 17 - 8 6 59 1.07 - 37 0 0 - 7 15 43 8 36 34.3 35 304 6 - 6 52 7 - 7 39 30 - 6 41 42 - 7 50 7 1.07 - 36 0 0 - 6 59 55 8 36 16.0 35 303 7 - 6 36 25 - 7 23 36 - 6 26 1 - 7 34 11 1.08 - 35 0 0 - 6 45 3 8 35 58.1 34 303 8 - 6 21 37 - 7 8 39 - 6 11 16 - 7 19 12 1.08 - 34 0 0 - 6 31 6 8 35 40.5 34 302 9 - 6 7 45 - 6 54 38 - 5 57 26 - 7 5 9 1.08 - 33 0 0 - 6 18 5 8 35 23.2 33 302 10 - 5 54 48 - 6 41 33 - 5 44 30 - 6 52 2 1.08 - 32 0 0 - 6 5 59 8 35 6.3 32 301 11 - 5 42 45 - 6 29 23 - 5 32 29 - 6 39 50 1.08 - 31 0 0 - 5 54 48 8 34 49.7 31 301 12 - 5 31 38 - 6 18 8 - 5 21 23 - 6 28 34 1.08 - 30 0 0 - 5 44 32 8 34 33.4 31 300 13 - 5 21 25 - 6 7 50 - 5 11 11 - 6 18 14 1.08 - 29 0 0 - 5 35 11 8 34 17.6 30 300 14 - 5 12 6 - 5 58 26 - 5 1 54 - 6 8 50 1.08 - 28 0 0 - 5 26 46 8 34 2.0 29 299 14 - 5 3 43 - 5 49 59 - 4 53 32 - 6 0 21 1.08 - 27 0 0 - 5 19 15 8 33 46.9 29 299 15 - 4 56 14 - 5 42 26 - 4 46 4 - 5 52 48 1.09 - 26 0 0 - 5 12 40 8 33 32.1 28 299 16 - 4 49 41 - 5 35 50 - 4 39 31 - 5 46 10 1.09 - 25 0 0 - 5 7 0 8 33 17.7 27 298 17 - 4 44 2 - 5 30 8 - 4 33 52 - 5 40 29 1.09 - 24 0 0 - 5 2 16 8 33 3.6 26 298 18 - 4 39 18 - 5 25 23 - 4 29 9 - 5 35 43 1.09 - 23 0 0 - 4 58 27 8 32 50.0 25 298 19 - 4 35 29 - 5 21 34 - 4 25 20 - 5 31 54 1.09 - 22 0 0 - 4 55 33 8 32 36.7 25 297 20 - 4 32 36 - 5 18 41 - 4 22 27 - 5 29 1 1.10 - 21 0 0 - 4 53 36 8 32 23.8 24 297 21 - 4 30 38 - 5 16 44 - 4 20 29 - 5 27 4 1.10 - 20 0 0 - 4 52 35 8 32 11.3 23 297 22 - 4 29 36 - 5 15 44 - 4 19 27 - 5 26 4 1.10 - 19 0 0 - 4 52 30 8 31 59.3 22 296 23 - 4 29 30 - 5 15 40 - 4 19 20 - 5 26 1 1.10 - 18 0 0 - 4 53 22 8 31 47.6 21 296 24 - 4 30 21 - 5 16 34 - 4 20 10 - 5 26 56 1.11 - 17 0 0 - 4 55 11 8 31 36.4 20 296 25 - 4 32 8 - 5 18 25 - 4 21 56 - 5 28 48 1.11 - 16 0 0 - 4 57 58 8 31 25.6 19 296 26 - 4 34 52 - 5 21 14 - 4 24 39 - 5 31 38 1.11 - 15 0 0 - 5 1 42 8 31 15.2 19 296 27 - 4 38 34 - 5 25 1 - 4 28 20 - 5 35 27 1.12 - 14 0 0 - 5 6 25 8 31 5.2 18 295 28 - 4 43 14 - 5 29 48 - 4 32 58 - 5 40 14 1.12 - 13 0 0 - 5 12 7 8 30 55.8 17 295 29 - 4 48 52 - 5 35 33 - 4 38 35 - 5 46 1 1.12 - 12 0 0 - 5 18 48 8 30 46.7 16 295 29 - 4 55 28 - 5 42 18 - 4 45 10 - 5 52 48 1.13 - 11 0 0 - 5 26 29 8 30 38.1 15 295 30 - 5 3 5 - 5 50 4 - 4 52 44 - 6 0 36 1.13 - 10 0 0 - 5 35 10 8 30 30.0 14 295 31 - 5 11 41 - 5 58 50 - 5 1 19 - 6 9 25 1.13 - 9 0 0 - 5 44 53 8 30 22.4 13 295 32 - 5 21 18 - 6 8 38 - 5 10 53 - 6 19 15 1.14 - 8 0 0 - 5 55 37 8 30 15.3 12 294 33 - 5 31 57 - 6 19 29 - 5 21 29 - 6 30 8 1.14 - 7 0 0 - 6 7 24 8 30 8.6 11 294 34 - 5 43 38 - 6 31 22 - 5 33 7 - 6 42 5 1.15 - 6 0 0 - 6 20 15 8 30 2.5 10 294 35 - 5 56 21 - 6 44 19 - 5 45 48 - 6 55 5 1.16 - 5 0 0 - 6 34 9 8 29 56.9 9 294 36 - 6 10 8 - 6 58 22 - 5 59 31 - 7 9 11 1.16 - 4 0 0 - 6 49 9 8 29 51.9 8 294 37 - 6 25 0 - 7 13 29 - 6 14 20 - 7 24 22 1.17 - 3 0 0 - 7 5 14 8 29 47.4 7 294 38 - 6 40 57 - 7 29 44 - 6 30 13 - 7 40 41 1.18 - 2 0 0 - 7 22 27 8 29 43.4 6 294 39 - 6 58 0 - 7 47 5 - 6 47 12 - 7 58 7 1.19 - 1 0 0 - 7 40 47 8 29 40.0 5 293 40 - 7 16 11 - 8 5 36 - 7 5 19 - 8 16 42 1.21 0 0 0 - 8 0 17 8 29 37.2 4 293 41 - 7 35 30 - 8 25 16 - 7 24 34 - 8 36 27 1.23 1 0 0 - 8 20 57 8 29 35.0 3 293 42 - 7 55 59 - 8 46 7 - 7 44 58 - 8 57 23 1.27 2 0 0 - 8 42 48 8 29 33.5 2 293 43 - 8 17 39 - 9 8 11 - 8 6 33 - 9 19 32 1.35 3 0 0 - 9 5 52 8 29 32.5 1 293 44 - 8 40 31 - 9 31 28 - 8 29 19 - 9 42 54 1.57 4 0 0 .. .. .... .. .. .. .. .. .. - 9 4 36 .. .. .. - 8 53 19 .. .. .. .... Uncertainty in time = +/- 4 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 562-010178 * constellation : Taurus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 04 25 10.5190 DE: +22 15 48.655 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 04 25 10.5191 DE: +22 15 48.655 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.500,0.300) * V mag [mag]: 11.1 * B mag [mag]: 13.2 * Diameter [mas]: 0.70 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (284) Amalia asteroid class: approx. diameter [km]: 57 approx. diameter ["]: 0.045 distance from Earth [AU]: 1.74220 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#130 date of fit: 2023 Apr 24 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): 0.016", 0.002", 90.347° remarks: * orbital elements for (284)Amalia : Mean anomaly = 94.8783326691 deg Arg. of pericenter = 58.1741924377 deg Long. of node = 233.6723429033 deg Inclination = 8.0547244283 deg Eccentricity = 0.2212621922 Semimajor axis = 2.3599440961 AU Perihelion dist = 1.8377776920 AU Mag: H = 10.26, G = 0.11 Epoch of elements : MJD 60595.36400562 TDT (2024 Oct 12.3640) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1302023Apr24,11.70,2024,10,12,8.736225,0.443303,-0.586130,-2.218040,-1.677310,-0.004189,-0.000706,0.000001,0.000000 -85.7976,22.3214,45.56,-7.64,False UCAC4 562-010178,4.41958861,22.2635152,13.16,11.05,9.91,0.7,4,,4.44440581,22.3214329,3.37,4.04,0,0,0 284,Amalia,14.37,57.632,1.7422,0,0,-0.807,-8.47,,3.2,0 0,94.7794,2024,10,12,58.1742,233.6723,8.0547,0.22126,2.35994,1.83778,10.25,5.0,0.15 1.222,0.0163,0.0025,90,0.0101,Known errors,1.21,0,-1,-1 20241012_010178,60140.63 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:05 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org