IOTA/IOTA-ES occultation update for (185851) 2000 DP107 / TYC 2861-01951-1 event on 2024 Oct 25, 18:28 UT Visible from Summary ------- On 2024 Oct 25 UT, the 0.70648872529669 km diameter asteroid (185851) 2000 DP107 will occult a 8.8 mag star in the constellation Perseus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 9.33 mag to 18.12 mag (the magnitude of the asteroid) for at most 0.090 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: 11 * date and approx. time of event: 2024 Oct 25, 18:15 - 2024 Oct 25, 18:41 * geocentric midpoint of event [JD]: 2460609.26971725 * magnitude of target star: 8.79 * magnitude drop [mag]: 9.33 * estimated maximum duration [s]: 0.090 * Moon: 36 % sunlit, 80° distance * Sun: 149° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 1 * 1 sigma uncertainty interval [path widths]: +/- 6.00 * 1 sigma uncertainty interval [seconds]: +/- 0.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.005, +/- 0.015) * 1 sigma uncertainty ellipse (major, minor, PA): (0.015", 0.005", 175°) * approx speed of asteroid's shadow [km/s]: 8.1178 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 2861-01951-1 by 185851 2000 DP107 on 2024 Oct 25 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 - 3 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. 10 42 7 .. .. .. .... - 2 0 0 11 27 16 18 41 6.6 1 51 -14 11 27 31 11 27 0 11 30 43 11 23 48 .... - 1 0 0 12 15 50 18 41 6.0 3 51 -15 12 16 6 12 15 34 12 19 18 12 12 22 -0.23 0 0 0 13 4 20 18 41 5.0 4 51 -16 13 4 36 13 4 4 13 7 48 13 0 52 -0.22 1 0 0 13 52 45 18 41 3.6 5 52 -18 13 53 1 13 52 29 13 56 13 13 49 17 -0.22 2 0 0 14 41 2 18 41 1.8 6 52 -19 14 41 18 14 40 47 14 44 30 14 37 34 -0.22 3 0 0 15 29 10 18 40 59.7 8 52 -20 15 29 26 15 28 54 15 32 38 15 25 42 -0.22 4 0 0 16 17 6 18 40 57.2 9 52 -21 16 17 22 16 16 50 16 20 34 16 13 38 -0.22 5 0 0 17 4 49 18 40 54.3 10 53 -22 17 5 4 17 4 33 17 8 17 17 1 21 -0.21 6 0 0 17 52 16 18 40 51.1 11 53 -23 17 52 32 17 52 0 17 55 44 17 48 48 -0.21 7 0 0 18 39 26 18 40 47.6 12 53 -24 18 39 42 18 39 10 18 42 54 18 35 59 -0.21 8 0 0 19 26 18 18 40 43.7 14 54 -25 19 26 34 19 26 2 19 29 45 19 22 50 -0.21 9 0 0 20 12 49 18 40 39.5 15 54 -26 20 13 5 20 12 33 20 16 16 20 9 22 -0.21 10 0 0 20 58 58 18 40 35.0 16 54 -27 20 59 14 20 58 42 21 2 25 20 55 31 -0.21 11 0 0 21 44 44 18 40 30.1 17 55 -28 21 45 0 21 44 28 21 48 11 21 41 17 -0.21 12 0 0 22 30 5 18 40 25.0 18 55 -29 22 30 20 22 29 49 22 33 31 22 26 38 -0.21 13 0 0 23 14 59 18 40 19.6 20 55 -30 23 15 15 23 14 43 23 18 25 23 11 33 -0.22 14 0 0 23 59 26 18 40 14.0 21 56 -30 23 59 42 23 59 10 24 2 52 23 56 0 -0.22 15 0 0 24 43 24 18 40 8.0 22 56 -31 24 43 39 24 43 8 24 46 49 24 39 59 -0.22 16 0 0 25 26 52 18 40 1.9 23 57 -32 25 27 7 25 26 36 25 30 17 25 23 27 -0.22 17 0 0 26 9 49 18 39 55.5 24 57 -33 26 10 4 26 9 33 26 13 13 26 6 24 -0.22 18 0 0 26 52 13 18 39 48.9 25 58 -34 26 52 29 26 51 58 26 55 37 26 48 49 -0.22 19 0 0 27 34 5 18 39 42.0 26 58 -35 27 34 20 27 33 49 27 37 28 27 30 42 -0.22 20 0 0 28 15 23 18 39 35.0 27 59 -36 28 15 38 28 15 7 28 18 45 28 12 0 -0.22 21 0 0 28 56 6 18 39 27.8 28 59 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41.3 41 68 -45 36 49 12 36 48 43 36 52 11 36 45 45 -0.23 35 0 0 37 20 50 18 37 32.5 42 69 -45 37 21 5 37 20 35 37 24 2 37 17 38 -0.23 36 0 0 37 52 3 18 37 23.6 43 69 -46 37 52 18 37 51 49 37 55 15 37 48 52 -0.23 37 0 0 38 22 38 18 37 14.7 44 70 -46 38 22 52 38 22 23 38 25 48 38 19 27 -0.23 38 0 0 38 52 33 18 37 5.8 45 71 -47 38 52 48 38 52 19 38 55 43 38 49 23 -0.23 39 0 0 39 21 50 18 36 56.8 46 72 -47 39 22 5 39 21 36 39 25 0 39 18 41 -0.23 40 0 0 39 50 29 18 36 47.7 47 73 -48 39 50 44 39 50 15 39 53 38 39 47 21 -0.23 41 0 0 40 18 30 18 36 38.7 48 73 -48 40 18 44 40 18 16 40 21 38 40 15 22 -0.23 42 0 0 40 45 53 18 36 29.6 48 74 -48 40 46 7 40 45 38 40 49 0 40 42 46 -0.23 43 0 0 41 12 38 18 36 20.6 49 75 -49 41 12 52 41 12 24 41 15 44 41 9 32 -0.23 44 0 0 41 38 46 18 36 11.5 50 76 -49 41 39 0 41 38 32 41 41 51 41 35 41 -0.23 45 0 0 42 4 17 18 36 2.4 51 77 -49 42 4 31 42 4 3 42 7 21 42 1 12 -0.23 46 0 0 42 29 11 18 35 53.3 52 78 -50 42 29 25 42 28 57 42 32 15 42 26 7 -0.23 47 0 0 42 53 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53 279 -24 43 38 16 43 37 49 43 41 4 43 35 1 -0.24 150 0 0 43 14 53 18 21 7.8 53 280 -24 43 15 7 43 14 39 43 17 55 43 11 51 -0.24 151 0 0 42 51 7 18 20 58.7 52 281 -23 42 51 21 42 50 53 42 54 10 42 48 4 -0.24 152 0 0 42 26 46 18 20 49.7 51 282 -22 42 27 0 42 26 32 42 29 50 42 23 42 -0.24 153 0 0 42 1 48 18 20 40.6 50 283 -21 42 2 2 42 1 34 42 4 53 41 58 43 -0.24 154 0 0 41 36 13 18 20 31.5 50 284 -21 41 36 27 41 35 59 41 39 19 41 33 8 -0.23 155 0 0 41 10 2 18 20 22.5 49 285 -20 41 10 16 41 9 47 41 13 8 41 6 56 -0.23 156 0 0 40 43 13 18 20 13.5 48 286 -19 40 43 27 40 42 58 40 46 19 40 40 6 -0.23 157 0 0 40 15 46 18 20 4.4 47 287 -19 40 16 0 40 15 32 40 18 54 40 12 38 -0.23 158 0 0 39 47 41 18 19 55.4 46 288 -18 39 47 56 39 47 27 39 50 50 39 44 33 -0.23 159 0 0 39 18 58 18 19 46.5 45 288 -17 39 19 13 39 18 44 39 22 8 39 15 49 -0.23 160 0 0 38 49 37 18 19 37.5 45 289 -16 38 49 52 38 49 23 38 52 47 38 46 27 -0.23 161 0 0 38 19 37 18 19 28.6 44 290 -16 38 19 52 38 19 23 38 22 48 38 16 26 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0 0 11 21 53 18 15 40.3 1 309 24 11 22 9 11 21 37 11 25 20 11 18 25 -0.60 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 2861-01951-1 * constellation : Perseus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 03 20 18.8295 DE: +38 25 05.663 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 03 20 18.8297 DE: +38 25 05.665 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 8.8 * B mag [mag]: 9.0 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (185851) 2000 DP107 asteroid class: asteroid system: multiple bodies approx. diameter [km]: 1 approx. diameter ["]: 0.002 distance from Earth [AU]: 0.40690 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#259 date of fit: 2023 Mar 01 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): 0.015", 0.005", 174.93° remarks: * orbital elements for (185851)2000 DP107 : Mean anomaly = 67.6369910246 deg Arg. of pericenter = 289.7669930525 deg Long. of node = 358.6501506843 deg Inclination = 8.6710018687 deg Eccentricity = 0.3764909394 Semimajor axis = 1.3651518648 AU Perihelion dist = 0.8511845568 AU Mag: H = 18.33, G = 0.15 Epoch of elements : MJD 60608.76971679 TDT (2024 Oct 25.7697) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#2592023Mar01,0.09,2024,10,25,18.473214,-0.000532,0.236812,-4.581919,-0.009487,-0.001258,-0.001501,0.000001,0.000000 98.7536,38.5090,-101.10,-12.46,False TYC 2861-01951-1,3.33856375,38.4182396,8.98,8.79,8.69,0.1,0,,3.36569363,38.5089882,9.33,8.98,0,0,0 185851,2000 DP107,18.12,0.736,0.4069,0,0,-8.435,-0.25,,0.1,0 S/2000 (2000 DP107) 1,0.3,2.620,1.758000,0.0100,17.00,,,, 0,67.1614,2024,10,25,289.7670,358.6502,8.6710,0.37649,1.36515,0.85118,18.33,5.0,0.15 7.060,0.0150,0.0047,175,0.0150,Known errors,0.93,0,-1,-1 20241025_1951-1,60140.66 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:49 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org