IOTA/IOTA-ES occultation update for (3701) Purkyne / TYC 6859-00460-1 event on 2024 Oct 22, 10:10 UT Visible from Summary ------- On 2024 Oct 22 UT, the 8.97235525928601 km diameter asteroid (3701) Purkyne will occult a 9.1 mag star in the constellation Sagittarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 9.20 mag to 18.27 mag (the magnitude of the asteroid) for at most 0.370 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 22, 10:07 - 2024 Oct 22, 10:13 * geocentric midpoint of event [JD]: 2460605.92419679 * magnitude of target star: 9.07 * magnitude drop [mag]: 9.20 * estimated maximum duration [s]: 0.370 * Moon: 70 % sunlit, 172° distance * Sun: 72° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 13 * 1 sigma uncertainty interval [path widths]: +/- 0.24 * 1 sigma uncertainty interval [seconds]: +/- 0.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.010, +/- 0.001) * 1 sigma uncertainty ellipse (major, minor, PA): (0.010", 0.001", 90°) * approx speed of asteroid's shadow [km/s]: 25.2801 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6859-00460-1 by 3701 Purkyne on 2024 Oct 22 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 - 14 0 0 -43 11 54 10 7 54.7 0 123 44 -43 16 17 -43 7 32 -43 18 25 -43 5 24 .... - 13 0 0 -43 40 18 10 7 54.8 1 122 45 -43 44 42 -43 35 55 -43 46 50 -43 33 47 0.83 - 12 0 0 -44 8 43 10 7 54.9 2 121 45 -44 13 6 -44 4 19 -44 15 15 -44 2 11 0.93 - 11 0 0 -44 37 6 10 7 55.1 3 121 45 -44 41 31 -44 32 42 -44 43 40 -44 30 33 0.96 - 10 0 0 -45 5 28 10 7 55.5 4 120 45 -45 9 53 -45 1 3 -45 12 2 -44 58 54 0.98 - 9 0 0 -45 33 47 10 7 55.8 4 119 46 -45 38 12 -45 29 22 -45 40 22 -45 27 13 0.99 - 8 0 0 -46 2 2 10 7 56.3 5 118 46 -46 6 28 -45 57 37 -46 8 38 -45 55 27 1.00 - 7 0 0 -46 30 13 10 7 56.8 6 118 46 -46 34 39 -46 25 47 -46 36 50 -46 23 37 1.01 - 6 0 0 -46 58 18 10 7 57.4 7 117 46 -47 2 45 -46 53 52 -47 4 55 -46 51 42 1.01 - 5 0 0 -47 26 17 10 7 58.1 8 116 46 -47 30 44 -47 21 50 -47 32 55 -47 19 40 1.02 - 4 0 0 -47 54 8 10 7 58.9 9 115 47 -47 58 36 -47 49 41 -48 0 46 -47 47 31 1.02 - 3 0 0 -48 21 51 10 7 59.7 9 115 47 -48 26 19 -48 17 24 -48 28 30 -48 15 13 1.02 - 2 0 0 -48 49 25 10 8 0.5 10 114 47 -48 53 53 -48 44 57 -48 56 4 -48 42 47 1.02 - 1 0 0 -49 16 48 10 8 1.5 11 113 47 -49 21 17 -49 12 20 -49 23 28 -49 10 10 1.02 0 0 0 -49 44 1 10 8 2.5 12 112 47 -49 48 30 -49 39 33 -49 50 41 -49 37 22 1.02 1 0 0 -50 11 2 10 8 3.5 12 111 47 -50 15 31 -50 6 34 -50 17 42 -50 4 23 1.03 2 0 0 -50 37 51 10 8 4.6 13 111 47 -50 42 19 -50 33 22 -50 44 30 -50 31 12 1.03 3 0 0 -51 4 26 10 8 5.8 14 110 47 -51 8 55 -50 59 57 -51 11 6 -50 57 47 1.03 4 0 0 -51 30 47 10 8 7.0 15 109 47 -51 35 16 -51 26 18 -51 37 27 -51 24 8 1.03 5 0 0 -51 56 53 10 8 8.3 15 108 47 -52 1 22 -51 52 25 -52 3 33 -51 50 14 1.03 6 0 0 -52 22 44 10 8 9.6 16 107 46 -52 27 13 -52 18 16 -52 29 24 -52 16 5 1.03 7 0 0 -52 48 19 10 8 10.9 17 106 46 -52 52 48 -52 43 51 -52 54 59 -52 41 40 1.03 8 0 0 -53 13 37 10 8 12.3 18 106 46 -53 18 6 -53 9 9 -53 20 17 -53 6 59 1.03 9 0 0 -53 38 39 10 8 13.7 18 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29 -56 42 38 -56 53 38 -56 40 29 1.05 171 0 0 -56 24 34 10 12 57.4 29 270 -17 -56 29 0 -56 20 9 -56 31 10 -56 18 0 1.05 172 0 0 -56 1 45 10 12 59.5 28 269 -18 -56 6 11 -55 57 19 -56 8 21 -55 55 9 1.05 173 0 0 -55 38 34 10 13 1.5 28 268 -19 -55 43 1 -55 34 8 -55 45 11 -55 31 59 1.05 174 0 0 -55 15 4 10 13 3.5 27 267 -19 -55 19 31 -55 10 37 -55 21 42 -55 8 28 1.05 175 0 0 -54 51 14 10 13 5.5 26 266 -20 -54 55 42 -54 46 47 -54 57 52 -54 44 37 1.05 176 0 0 -54 27 5 10 13 7.5 26 265 -21 -54 31 32 -54 22 37 -54 33 43 -54 20 27 1.06 177 0 0 -54 2 36 10 13 9.5 25 264 -21 -54 7 4 -53 58 9 -54 9 15 -53 55 58 1.06 178 0 0 -53 37 50 10 13 11.4 24 263 -22 -53 42 18 -53 33 22 -53 44 29 -53 31 11 1.06 179 0 0 -53 12 45 10 13 13.3 24 262 -22 -53 17 13 -53 8 17 -53 19 25 -53 6 6 1.06 180 0 0 -52 47 23 10 13 15.2 23 261 -23 -52 51 52 -52 42 55 -52 54 3 -52 40 44 1.06 -179 0 0 -52 21 44 10 13 17.0 22 261 -24 -52 26 13 -52 17 16 -52 28 24 -52 15 5 1.06 -178 0 0 -51 55 49 10 13 18.8 22 260 -24 -52 0 18 -51 51 21 -52 2 29 -51 49 10 1.06 -177 0 0 -51 29 39 10 13 20.6 21 259 -25 -51 34 8 -51 25 10 -51 36 19 -51 22 59 1.06 -176 0 0 -51 3 13 10 13 22.3 20 258 -26 -51 7 42 -50 58 45 -51 9 54 -50 56 34 1.07 -175 0 0 -50 36 34 10 13 24.0 20 257 -26 -50 41 3 -50 32 5 -50 43 14 -50 29 55 1.07 -174 0 0 -50 9 41 10 13 25.7 19 256 -27 -50 14 10 -50 5 13 -50 16 21 -50 3 2 1.07 -173 0 0 -49 42 36 10 13 27.3 18 255 -28 -49 47 4 -49 38 8 -49 49 16 -49 35 57 1.07 -172 0 0 -49 15 19 10 13 28.8 17 254 -28 -49 19 47 -49 10 51 -49 21 58 -49 8 40 1.07 -171 0 0 -48 47 50 10 13 30.3 17 253 -29 -48 52 19 -48 43 23 -48 54 30 -48 41 12 1.07 -170 0 0 -48 20 12 10 13 31.8 16 253 -29 -48 24 40 -48 15 45 -48 26 51 -48 13 34 1.08 -169 0 0 -47 52 25 10 13 33.2 15 252 -30 -47 56 52 -47 47 57 -47 59 3 -47 45 47 1.08 -168 0 0 -47 24 29 10 13 34.5 14 251 -31 -47 28 56 -47 20 2 -47 31 7 -47 17 52 1.08 -167 0 0 -46 56 25 10 13 35.8 14 250 -31 -47 0 52 -46 51 59 -47 3 3 -46 49 49 1.09 -166 0 0 -46 28 15 10 13 37.0 13 249 -32 -46 32 42 -46 23 49 -46 34 52 -46 21 40 1.09 -165 0 0 -46 0 0 10 13 38.1 12 249 -32 -46 4 26 -45 55 34 -46 6 36 -45 53 25 1.09 -164 0 0 -45 31 40 10 13 39.2 11 248 -33 -45 36 5 -45 27 14 -45 38 15 -45 25 5 1.10 -163 0 0 -45 3 16 10 13 40.2 10 247 -34 -45 7 41 -44 58 51 -45 9 50 -44 56 42 1.10 -162 0 0 -44 34 49 10 13 41.2 9 247 -34 -44 39 14 -44 30 25 -44 41 23 -44 28 16 1.11 -161 0 0 -44 6 21 10 13 42.0 9 246 -35 -44 10 45 -44 1 57 -44 12 54 -43 59 49 1.12 -160 0 0 -43 37 52 10 13 42.8 8 245 -35 -43 42 16 -43 33 29 -43 44 24 -43 31 21 1.13 -159 0 0 -43 9 24 10 13 43.5 7 244 -36 -43 13 46 -43 5 1 -43 15 55 -43 2 53 1.14 -158 0 0 -42 40 56 10 13 44.1 6 244 -36 -42 45 18 -42 36 34 -42 47 26 -42 34 27 1.15 -157 0 0 -42 12 31 10 13 44.7 5 243 -37 -42 16 53 -42 8 10 -42 19 0 -42 6 3 1.17 -156 0 0 -41 44 9 10 13 45.2 4 242 -37 -41 48 30 -41 39 49 -41 50 37 -41 37 42 1.20 -155 0 0 -41 15 52 10 13 45.5 3 242 -38 -41 20 12 -41 11 32 -41 22 19 -41 9 26 1.25 -154 0 0 -40 47 39 10 13 45.8 2 241 -38 -40 51 59 -40 43 20 -40 54 5 -40 41 14 1.32 -153 0 0 -40 19 33 10 13 46.0 2 240 -38 -40 23 52 -40 15 15 -40 25 58 -40 13 9 1.49 -152 0 0 -39 51 34 10 13 46.2 1 240 -39 -39 55 52 -39 47 17 -39 57 57 -39 45 11 2.09 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 6859-00460-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 49 49.3983 DE: -23 21 44.665 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 49 49.3980 DE: -23 21 44.665 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 9.1 * B mag [mag]: 9.9 * Diameter [mas]: 0.20 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3701) Purkyne asteroid class: approx. diameter [km]: 9 approx. diameter ["]: 0.004 distance from Earth [AU]: 3.03090 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#48 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): 0.010", 0.001", 90.116° remarks: * orbital elements for (3701)Purkyne : Mean anomaly = 254.4615496880 deg Arg. of pericenter = 300.3530951591 deg Long. of node = 115.4957579075 deg Inclination = 4.9231230796 deg Eccentricity = 0.0910384269 Semimajor axis = 2.7987389329 AU Perihelion dist = 2.5439461431 AU Mag: H = 12.59, G = 0.15 Epoch of elements : MJD 60605.42419646 TDT (2024 Oct 22.4242) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#482023Apr24,0.37,2024,10,22,10.180723,0.027187,-0.714954,14.259057,0.527261,0.005535,0.000475,0.000000,0.000000 98.7824,-23.3349,23.39,-11.30,False TYC 6859-00460-1,18.83038845,-23.3624069,9.89,9.07,8.63,0.2,0,,18.85528705,-23.3349464,9.20,9.20,0,0,0 3701,Purkyne,18.27,9.412,3.0309,0,0,3.005,1.53,,1.0,0 0,254.3723,2024,10,22,300.3531,115.4958,4.9231,0.09104,2.79874,2.54395,12.59,5.0,0.15 1.244,0.0100,0.0010,90,0.0010,Known errors,0.79,0,-1,-1 20241022_0460-1,60140.65 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:39 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org