IOTA/IOTA-ES occultation update for (1699) Honkasalo / UCAC4 553-042466 event on 2024 Oct 09, 03:31 UT Visible from Summary ------- On 2024 Oct 09 UT, the 8.534 km diameter asteroid (1699) Honkasalo will occult a 11.9 mag star in the constellation Cancer for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.55 mag to 17.40 mag (the magnitude of the asteroid) for at most 0.400 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: 93 * date and approx. time of event: 2024 Oct 09, 03:28 - 2024 Oct 09, 03:34 * geocentric midpoint of event [JD]: 2460592.64686391 * magnitude of target star: 11.86 * magnitude drop [mag]: 5.55 * estimated maximum duration [s]: 0.400 * Moon: 33 % sunlit, 147° distance * Sun: 77° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 16 * 1 sigma uncertainty interval [path widths]: +/- 0.47 * 1 sigma uncertainty interval [seconds]: +/- 0.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.008, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.008", 0.002", 109°) * approx speed of asteroid's shadow [km/s]: 21.5381 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 553-042466 by 1699 Honkasalo on 2024 Oct 9 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 - 20 0 0 -41 55 36 3 28 56.0 0 62 -32 -42 0 38 -41 50 35 -42 5 19 -41 45 56 .... - 19 0 0 -41 32 13 3 28 56.1 1 62 -32 -41 37 13 -41 27 13 -41 41 52 -41 22 36 0.62 - 18 0 0 -41 9 24 3 28 56.3 2 61 -31 -41 14 22 -41 4 26 -41 18 59 -40 59 51 1.10 - 17 0 0 -40 47 11 3 28 56.6 3 60 -31 -40 52 7 -40 42 15 -40 56 43 -40 37 42 1.28 - 16 0 0 -40 25 33 3 28 57.0 3 60 -31 -40 30 28 -40 20 39 -40 35 2 -40 16 8 1.37 - 15 0 0 -40 4 32 3 28 57.6 4 59 -31 -40 9 25 -39 59 40 -40 13 58 -39 55 10 1.42 - 14 0 0 -39 44 8 3 28 58.2 5 58 -30 -39 48 59 -39 39 18 -39 53 30 -39 34 49 1.46 - 13 0 0 -39 24 21 3 28 59.0 6 58 -30 -39 29 11 -39 19 32 -39 33 40 -39 15 5 1.49 - 12 0 0 -39 5 12 3 29 0.0 7 57 -29 -39 10 0 -39 0 24 -39 14 28 -38 55 58 1.51 - 11 0 0 -38 46 41 3 29 1.0 8 56 -29 -38 51 27 -38 41 54 -38 55 54 -38 37 30 1.52 - 10 0 0 -38 28 47 3 29 2.2 8 56 -29 -38 33 33 -38 24 3 -38 37 58 -38 19 39 1.54 - 9 0 0 -38 11 33 3 29 3.4 9 55 -28 -38 16 17 -38 6 50 -38 20 41 -38 2 27 1.55 - 8 0 0 -37 54 58 3 29 4.8 10 54 -28 -37 59 40 -37 50 15 -38 4 3 -37 45 54 1.56 - 7 0 0 -37 39 1 3 29 6.4 11 54 -27 -37 43 43 -37 34 20 -37 48 5 -37 30 1 1.57 - 6 0 0 -37 23 45 3 29 8.0 12 53 -26 -37 28 25 -37 19 5 -37 32 46 -37 14 46 1.57 - 5 0 0 -37 9 8 3 29 9.7 12 52 -26 -37 13 47 -37 4 29 -37 18 7 -37 0 11 1.58 - 4 0 0 -36 55 11 3 29 11.6 13 52 -25 -36 59 49 -36 50 33 -37 4 8 -36 46 16 1.58 - 3 0 0 -36 41 54 3 29 13.5 14 51 -25 -36 46 32 -36 37 18 -36 50 50 -36 33 2 1.59 - 2 0 0 -36 29 18 3 29 15.6 15 50 -24 -36 33 55 -36 24 43 -36 38 12 -36 20 28 1.59 - 1 0 0 -36 17 23 3 29 17.8 15 50 -24 -36 21 59 -36 12 48 -36 26 15 -36 8 34 1.60 0 0 0 -36 6 9 3 29 20.0 16 49 -23 -36 10 43 -36 1 34 -36 14 59 -35 57 21 1.60 1 0 0 -35 55 35 3 29 22.4 17 48 -22 -36 0 9 -35 51 2 -36 4 24 -35 46 49 1.60 2 0 0 -35 45 43 3 29 24.9 18 47 -22 -35 50 16 -35 41 10 -35 54 30 -35 36 58 1.61 3 0 0 -35 36 32 3 29 27.5 18 47 -21 -35 41 5 -35 32 0 -35 45 18 -35 27 49 1.61 4 0 0 -35 28 3 3 29 30.2 19 46 -20 -35 32 35 -35 23 32 -35 36 48 -35 19 21 1.61 5 0 0 -35 20 15 3 29 32.9 20 45 -20 -35 24 47 -35 15 45 -35 28 59 -35 11 34 1.62 6 0 0 -35 13 10 3 29 35.8 20 44 -19 -35 17 41 -35 8 39 -35 21 52 -35 4 29 1.62 7 0 0 -35 6 46 3 29 38.7 21 44 -18 -35 11 17 -35 2 16 -35 15 28 -34 58 6 1.62 8 0 0 -35 1 4 3 29 41.8 22 43 -17 -35 5 34 -34 56 35 -35 9 45 -34 52 26 1.62 9 0 0 -34 56 5 3 29 44.9 22 42 -17 -35 0 35 -34 51 36 -35 4 45 -34 47 27 1.63 10 0 0 -34 51 48 3 29 48.1 23 41 -16 -34 56 17 -34 47 19 -35 0 27 -34 43 10 1.63 11 0 0 -34 48 13 3 29 51.4 24 40 -15 -34 52 42 -34 43 44 -34 56 52 -34 39 35 1.63 12 0 0 -34 45 20 3 29 54.7 24 40 -14 -34 49 49 -34 40 52 -34 53 59 -34 36 43 1.63 13 0 0 -34 43 10 3 29 58.2 25 39 -14 -34 47 39 -34 38 42 -34 51 49 -34 34 33 1.63 14 0 0 -34 41 42 3 30 1.7 25 38 -13 -34 46 11 -34 37 14 -34 50 21 -34 33 6 1.63 15 0 0 -34 40 57 3 30 5.3 26 37 -12 -34 45 26 -34 36 29 -34 49 36 -34 32 21 1.64 16 0 0 -34 40 55 3 30 8.9 26 36 -11 -34 45 24 -34 36 27 -34 49 34 -34 32 19 1.64 17 0 0 -34 41 35 3 30 12.6 27 35 -10 -34 46 4 -34 37 7 -34 50 14 -34 32 59 1.64 18 0 0 -34 42 58 3 30 16.4 27 34 -10 -34 47 27 -34 38 30 -34 51 37 -34 34 22 1.64 19 0 0 -34 45 4 3 30 20.3 28 33 -9 -34 49 33 -34 40 35 -34 53 43 -34 36 27 1.64 20 0 0 -34 47 53 3 30 24.1 28 32 -8 -34 52 22 -34 43 24 -34 56 32 -34 39 15 1.64 21 0 0 -34 51 24 3 30 28.1 28 31 -7 -34 55 54 -34 46 55 -35 0 4 -34 42 46 1.64 22 0 0 -34 55 38 3 30 32.1 29 30 -6 -35 0 8 -34 51 8 -35 4 19 -34 46 59 1.64 23 0 0 -35 0 34 3 30 36.1 29 29 -5 -35 5 5 -34 56 5 -35 9 16 -34 51 55 1.64 24 0 0 -35 6 14 3 30 40.2 29 28 -5 -35 10 45 -35 1 43 -35 14 56 -34 57 33 1.65 25 0 0 -35 12 36 3 30 44.4 30 27 -4 -35 17 7 -35 8 5 -35 21 19 -35 3 54 1.65 26 0 0 -35 19 40 3 30 48.5 30 26 -3 -35 24 12 -35 15 9 -35 28 25 -35 10 58 1.65 27 0 0 -35 27 27 3 30 52.7 30 25 -2 -35 32 0 -35 22 55 -35 36 13 -35 18 44 1.65 28 0 0 -35 35 57 3 30 57.0 30 24 -1 -35 40 30 -35 31 24 -35 44 44 -35 27 12 1.65 29 0 0 -35 45 9 3 31 1.2 31 23 0 -35 49 43 -35 40 35 -35 53 57 -35 36 22 1.65 30 0 0 -35 55 3 3 31 5.5 31 22 0 -35 59 38 -35 50 29 -36 3 53 -35 46 15 1.65 31 0 0 -36 5 40 3 31 9.8 31 21 1 -36 10 15 -36 1 5 -36 14 31 -35 56 50 1.65 32 0 0 -36 16 58 3 31 14.2 31 20 2 -36 21 35 -36 12 22 -36 25 52 -36 8 7 1.65 33 0 0 -36 28 59 3 31 18.5 31 19 3 -36 33 36 -36 24 22 -36 37 54 -36 20 6 1.65 34 0 0 -36 41 41 3 31 22.9 31 18 4 -36 46 19 -36 37 3 -36 50 38 -36 32 46 1.65 35 0 0 -36 55 5 3 31 27.3 31 16 5 -36 59 45 -36 50 26 -37 4 4 -36 46 8 1.65 36 0 0 -37 9 11 3 31 31.6 31 15 6 -37 13 51 -37 4 31 -37 18 12 -37 0 12 1.65 37 0 0 -37 23 58 3 31 36.0 31 14 6 -37 28 39 -37 19 16 -37 33 1 -37 14 56 1.65 38 0 0 -37 39 26 3 31 40.4 31 13 7 -37 44 9 -37 34 43 -37 48 32 -37 30 22 1.65 39 0 0 -37 55 34 3 31 44.8 31 12 8 -38 0 19 -37 50 51 -38 4 43 -37 46 28 1.65 40 0 0 -38 12 24 3 31 49.1 31 11 9 -38 17 9 -38 7 39 -38 21 35 -38 3 15 1.65 41 0 0 -38 29 54 3 31 53.5 31 10 10 -38 34 41 -38 25 7 -38 39 8 -38 20 42 1.65 42 0 0 -38 48 3 3 31 57.8 31 8 10 -38 52 52 -38 43 16 -38 57 20 -38 38 49 1.66 43 0 0 -39 6 53 3 32 2.1 30 7 11 -39 11 43 -39 2 4 -39 16 13 -38 57 36 1.66 44 0 0 -39 26 22 3 32 6.4 30 6 12 -39 31 14 -39 21 31 -39 35 45 -39 17 2 1.66 45 0 0 -39 46 31 3 32 10.7 30 5 13 -39 51 24 -39 41 38 -39 55 57 -39 37 7 1.66 46 0 0 -40 7 18 3 32 14.9 30 4 13 -40 12 13 -40 2 23 -40 16 47 -39 57 51 1.66 47 0 0 -40 28 43 3 32 19.1 29 3 14 -40 33 40 -40 23 47 -40 38 16 -40 19 13 1.66 48 0 0 -40 50 46 3 32 23.3 29 2 15 -40 55 45 -40 45 48 -41 0 23 -40 41 13 1.66 49 0 0 -41 13 27 3 32 27.4 29 1 16 -41 18 28 -41 8 27 -41 23 7 -41 3 50 1.66 50 0 0 -41 36 45 3 32 31.4 28 360 16 -41 41 47 -41 31 43 -41 46 29 -41 27 4 1.66 51 0 0 -42 0 39 3 32 35.4 28 359 17 -42 5 44 -41 55 35 -42 10 27 -41 50 54 1.66 52 0 0 -42 25 9 3 32 39.4 27 357 18 -42 30 16 -42 20 3 -42 35 1 -42 15 20 1.66 53 0 0 -42 50 14 3 32 43.3 27 356 19 -42 55 23 -42 45 6 -43 0 10 -42 40 21 1.66 54 0 0 -43 15 54 3 32 47.1 26 355 19 -43 21 5 -43 10 44 -43 25 54 -43 5 57 1.66 55 0 0 -43 42 8 3 32 50.9 26 354 20 -43 47 21 -43 36 55 -43 52 13 -43 32 6 1.66 56 0 0 -44 8 55 3 32 54.6 25 353 20 -44 14 11 -44 3 40 -44 19 4 -43 58 49 1.66 57 0 0 -44 36 15 3 32 58.2 25 352 21 -44 41 33 -44 30 57 -44 46 29 -44 26 4 1.66 58 0 0 -45 4 6 3 33 1.8 24 351 22 -45 9 27 -44 58 46 -45 14 25 -44 53 51 1.66 59 0 0 -45 32 29 3 33 5.3 24 350 22 -45 37 52 -45 27 6 -45 42 53 -45 22 8 1.66 60 0 0 -46 1 21 3 33 8.7 23 349 23 -46 6 47 -45 55 57 -46 11 51 -45 50 56 1.66 61 0 0 -46 30 43 3 33 12.0 22 348 23 -46 36 12 -46 25 16 -46 41 18 -46 20 13 1.66 62 0 0 -47 0 33 3 33 15.2 22 347 24 -47 6 5 -46 55 3 -47 11 13 -46 49 58 1.66 63 0 0 -47 30 51 3 33 18.3 21 346 24 -47 36 25 -47 25 18 -47 41 36 -47 20 10 1.66 64 0 0 -48 1 35 3 33 21.3 21 345 25 -48 7 12 -47 55 59 -48 12 25 -47 50 48 1.66 65 0 0 -48 32 44 3 33 24.3 20 344 25 -48 38 24 -48 27 5 -48 43 40 -48 21 52 1.66 66 0 0 -49 4 17 3 33 27.1 19 343 26 -49 9 59 -48 58 35 -49 15 19 -48 53 19 1.66 67 0 0 -49 36 13 3 33 29.8 18 343 26 -49 41 59 -49 30 28 -49 47 20 -49 25 9 1.66 68 0 0 -50 8 30 3 33 32.4 18 342 27 -50 14 19 -50 2 42 -50 19 44 -49 57 21 1.66 69 0 0 -50 41 9 3 33 34.9 17 341 27 -50 47 1 -50 35 18 -50 52 29 -50 29 53 1.66 70 0 0 -51 14 6 3 33 37.3 16 340 27 -51 20 1 -51 8 12 -51 25 32 -51 2 45 1.66 71 0 0 -51 47 21 3 33 39.6 16 339 28 -51 53 20 -51 41 24 -51 58 53 -51 35 54 1.67 72 0 0 -52 20 53 3 33 41.8 15 338 28 -52 26 54 -52 14 52 -52 32 31 -52 9 19 1.67 73 0 0 -52 54 39 3 33 43.9 14 337 28 -53 0 44 -52 48 35 -53 6 24 -52 42 59 1.67 74 0 0 -53 28 39 3 33 45.8 13 336 28 -53 34 48 -53 22 32 -53 40 31 -53 16 53 1.67 75 0 0 -54 2 51 3 33 47.7 13 335 29 -54 9 3 -53 56 41 -54 14 50 -53 50 59 1.67 76 0 0 -54 37 14 3 33 49.4 12 334 29 -54 43 29 -54 31 0 -54 49 19 -54 25 15 1.67 77 0 0 -55 11 45 3 33 51.0 11 334 29 -55 18 4 -55 5 28 -55 23 57 -54 59 40 1.67 78 0 0 -55 46 24 3 33 52.5 10 333 29 -55 52 46 -55 40 3 -55 58 42 -55 34 12 1.68 79 0 0 -56 21 8 3 33 53.8 9 332 29 -56 27 33 -56 14 44 -56 33 32 -56 8 50 1.68 80 0 0 -56 55 55 3 33 55.1 9 331 29 -57 2 24 -56 49 28 -57 8 26 -56 43 31 1.68 81 0 0 -57 30 45 3 33 56.2 8 330 29 -57 37 17 -57 24 14 -57 43 22 -57 18 14 1.69 82 0 0 -58 5 34 3 33 57.2 7 329 29 -58 12 10 -57 59 1 -58 18 18 -57 52 57 1.69 83 0 0 -58 40 22 3 33 58.1 6 328 29 -58 47 1 -58 33 45 -58 53 13 -58 27 39 1.70 84 0 0 -59 15 7 3 33 58.9 6 327 29 -59 21 49 -59 8 27 -59 28 4 -59 2 17 1.70 85 0 0 -59 49 47 3 33 59.6 5 327 29 -59 56 32 -59 43 3 -60 2 50 -59 36 51 1.71 86 0 0 -60 24 19 3 34 0.2 4 326 29 -60 31 8 -60 17 32 -60 37 29 -60 11 17 1.72 87 0 0 -60 58 42 3 34 0.7 3 325 29 -61 5 34 -60 51 53 -61 11 58 -60 45 35 1.74 88 0 0 -61 32 55 3 34 1.0 3 324 29 -61 39 50 -61 26 2 -61 46 17 -61 19 42 1.76 89 0 0 -62 6 55 3 34 1.3 2 323 29 -62 13 53 -61 59 59 -62 20 22 -61 53 36 1.81 90 0 0 -62 40 40 3 34 1.5 1 322 29 -62 47 41 -62 33 42 -62 54 13 -62 27 16 1.91 91 0 0 -63 14 10 3 34 1.5 0 321 29 -63 21 13 -63 7 9 -63 27 48 -63 0 40 2.38 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 553-042466 * constellation : Cancer * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 08 02 38.0554 DE: +20 24 50.781 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 08 02 38.0555 DE: +20 24 50.781 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 11.9 * B mag [mag]: 12.1 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1699) Honkasalo asteroid class: approx. diameter [km]: 9 approx. diameter ["]: 0.005 distance from Earth [AU]: 2.41380 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#46 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): 0.008", 0.002", 108.748° remarks: * orbital elements for (1699)Honkasalo : Mean anomaly = 113.3831561580 deg Arg. of pericenter = 51.8550363132 deg Long. of node = 273.4644729533 deg Inclination = 1.9726097701 deg Eccentricity = 0.1659219144 Semimajor axis = 2.2117865924 AU Perihelion dist = 1.8448027267 AU Mag: H = 12.46, G = 0.15 Epoch of elements : MJD 60592.14686354 TDT (2024 Oct 09.1469) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#462023Apr24,0.40,2024,10,9,3.524734,-0.200077,-0.830456,11.819323,-2.844023,-0.005371,0.001127,0.000000,0.000000 49.8982,20.3460,123.94,-6.43,False UCAC4 553-042466,8.04390423,20.4141060,12.10,11.86,11.73,0.0,0,,8.06789635,20.3460493,5.55,5.23,0,0,0 1699,Honkasalo,17.40,8.534,2.4138,0,0,3.062,-10.37,,0.6,0 0,113.3392,2024,10,9,51.8550,273.4645,1.9726,0.16592,2.21179,1.84480,12.46,5.0,0.15 1.464,0.0080,0.0022,109,0.0023,Known errors,0.90,0,-1,-1 20241009_042466,60140.62 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 14:54 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org