IOTA/IOTA-ES occultation update for (1209) Pumma / UCAC4 318-231928 event on 2024 Oct 16, 17:21 UT Visible from Summary ------- On 2024 Oct 16 UT, the 26.357 km diameter asteroid (1209) Pumma will occult a 11.8 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 4.36 mag to 16.18 mag (the magnitude of the asteroid) for at most 1.430 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: 97 * date and approx. time of event: 2024 Oct 16, 17:15 - 2024 Oct 16, 17:27 * geocentric midpoint of event [JD]: 2460600.22330963 * magnitude of target star: 11.84 * magnitude drop [mag]: 4.36 * estimated maximum duration [s]: 1.430 * Moon: 99 % sunlit, 81° distance * Sun: 89° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 27 * 1 sigma uncertainty interval [path widths]: +/- 0.38 * 1 sigma uncertainty interval [seconds]: +/- 2.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.021, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.021", 0.004", 87°) * approx speed of asteroid's shadow [km/s]: 18.4838 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 318-231928 by 1209 Pumma on 2024 Oct 16 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 - 79 0 0 .. .. .... .. .. .. .. .. .. - 0 28 45 .. .. .. - 0 34 57 .. .. .. .... - 78 0 0 - 0 50 33 17 15 55.3 1 116 80 - 0 58 40 - 0 42 27 - 1 4 51 - 0 36 15 .... - 77 0 0 - 1 20 11 17 15 55.5 2 116 80 - 1 28 17 - 1 12 6 - 1 34 27 - 1 5 55 -0.07 - 76 0 0 - 1 49 31 17 15 55.8 3 116 80 - 1 57 36 - 1 41 26 - 2 3 45 - 1 35 16 -0.11 - 75 0 0 - 2 18 32 17 15 56.3 4 116 80 - 2 26 35 - 2 10 28 - 2 32 44 - 2 4 18 -0.13 - 74 0 0 - 2 47 13 17 15 56.9 6 116 79 - 2 55 15 - 2 39 10 - 3 1 24 - 2 33 1 -0.14 - 73 0 0 - 3 15 33 17 15 57.6 7 116 79 - 3 23 35 - 3 7 32 - 3 29 42 - 3 1 24 -0.15 - 72 0 0 - 3 43 33 17 15 58.5 8 116 78 - 3 51 33 - 3 35 32 - 3 57 40 - 3 29 25 -0.15 - 71 0 0 - 4 11 11 17 15 59.4 9 116 77 - 4 19 10 - 4 3 11 - 4 25 16 - 3 57 5 -0.16 - 70 0 0 - 4 38 27 17 16 0.5 10 116 77 - 4 46 25 - 4 30 28 - 4 52 30 - 4 24 22 -0.16 - 69 0 0 - 5 5 20 17 16 1.8 11 116 76 - 5 13 17 - 4 57 22 - 5 19 21 - 4 51 17 -0.16 - 68 0 0 - 5 31 49 17 16 3.1 12 116 75 - 5 39 45 - 5 23 53 - 5 45 49 - 5 17 49 -0.17 - 67 0 0 - 5 57 55 17 16 4.6 13 116 74 - 6 5 50 - 5 50 0 - 6 11 53 - 5 43 57 -0.17 - 66 0 0 - 6 23 37 17 16 6.2 14 116 73 - 6 31 31 - 6 15 42 - 6 37 32 - 6 9 40 -0.17 - 65 0 0 - 6 48 53 17 16 7.9 15 116 72 - 6 56 46 - 6 41 0 - 7 2 47 - 6 34 59 -0.17 - 64 0 0 - 7 13 45 17 16 9.7 16 116 71 - 7 21 37 - 7 5 53 - 7 27 37 - 6 59 52 -0.17 - 63 0 0 - 7 38 11 17 16 11.7 18 115 70 - 7 46 2 - 7 30 20 - 7 52 1 - 7 24 20 -0.17 - 62 0 0 - 8 2 11 17 16 13.7 19 115 69 - 8 10 0 - 7 54 21 - 8 15 59 - 7 48 22 -0.18 - 61 0 0 - 8 25 45 17 16 15.9 20 115 69 - 8 33 33 - 8 17 56 - 8 39 30 - 8 11 58 -0.18 - 60 0 0 - 8 48 51 17 16 18.1 21 115 68 - 8 56 39 - 8 41 4 - 9 2 35 - 8 35 7 -0.18 - 59 0 0 - 9 11 31 17 16 20.5 22 115 67 - 9 19 17 - 9 3 45 - 9 25 13 - 8 57 48 -0.18 - 58 0 0 - 9 33 43 17 16 23.0 23 115 66 - 9 41 28 - 9 25 58 - 9 47 23 - 9 20 3 -0.18 - 57 0 0 - 9 55 28 17 16 25.6 24 115 65 -10 3 12 - 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32 0 0 -16 20 10 17 17 58.2 49 112 40 -16 27 31 -16 12 48 -16 33 9 -16 7 10 -0.19 - 31 0 0 -16 29 0 17 18 2.9 50 112 39 -16 36 21 -16 21 38 -16 41 58 -16 16 1 -0.19 - 30 0 0 -16 37 19 17 18 7.5 51 112 38 -16 44 40 -16 29 58 -16 50 16 -16 24 21 -0.19 - 29 0 0 -16 45 8 17 18 12.3 52 112 37 -16 52 28 -16 37 47 -16 58 4 -16 32 11 -0.19 - 28 0 0 -16 52 26 17 18 17.1 53 112 36 -16 59 45 -16 45 6 -17 5 21 -16 39 30 -0.19 - 27 0 0 -16 59 13 17 18 21.9 54 112 35 -17 6 32 -16 51 54 -17 12 8 -16 46 18 -0.19 - 26 0 0 -17 5 30 17 18 26.8 55 112 34 -17 12 49 -16 58 11 -17 18 24 -16 52 35 -0.19 - 25 0 0 -17 11 16 17 18 31.8 56 112 33 -17 18 34 -17 3 57 -17 24 9 -16 58 22 -0.19 - 24 0 0 -17 16 31 17 18 36.8 57 112 32 -17 23 49 -17 9 12 -17 29 23 -17 3 38 -0.19 - 23 0 0 -17 21 15 17 18 41.8 58 112 31 -17 28 33 -17 13 57 -17 34 7 -17 8 23 -0.19 - 22 0 0 -17 25 29 17 18 46.9 59 113 30 -17 32 47 -17 18 11 -17 38 21 -17 12 37 -0.19 - 21 0 0 -17 29 12 17 18 52.1 59 113 29 -17 36 30 -17 21 55 -17 42 3 -17 16 20 -0.19 - 20 0 0 -17 32 25 17 18 57.2 60 113 28 -17 39 42 -17 25 7 -17 45 15 -17 19 33 -0.20 - 19 0 0 -17 35 6 17 19 2.5 61 113 27 -17 42 23 -17 27 49 -17 47 57 -17 22 15 -0.20 - 18 0 0 -17 37 17 17 19 7.7 62 114 26 -17 44 34 -17 30 0 -17 50 7 -17 24 26 -0.20 - 17 0 0 -17 38 57 17 19 13.1 63 114 25 -17 46 14 -17 31 40 -17 51 47 -17 26 6 -0.20 - 16 0 0 -17 40 6 17 19 18.4 64 115 24 -17 47 23 -17 32 49 -17 52 56 -17 27 16 -0.20 - 15 0 0 -17 40 45 17 19 23.8 65 115 23 -17 48 1 -17 33 28 -17 53 35 -17 27 54 -0.20 - 14 0 0 -17 40 52 17 19 29.3 66 116 22 -17 48 9 -17 33 36 -17 53 42 -17 28 2 -0.20 - 13 0 0 -17 40 29 17 19 34.7 67 117 21 -17 47 46 -17 33 12 -17 53 19 -17 27 39 -0.20 - 12 0 0 -17 39 35 17 19 40.3 68 117 20 -17 46 52 -17 32 18 -17 52 25 -17 26 45 -0.20 - 11 0 0 -17 38 10 17 19 45.8 68 118 19 -17 45 27 -17 30 53 -17 51 1 -17 25 20 -0.20 - 10 0 0 -17 36 15 17 19 51.4 69 119 18 -17 43 32 -17 28 58 -17 49 5 -17 23 24 -0.20 - 9 0 0 -17 33 48 17 19 57.0 70 120 17 -17 41 5 -17 26 31 -17 46 39 -17 20 57 -0.20 - 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9 59 57 17 23 38.8 66 224 -20 -10 7 42 - 9 52 12 -10 13 36 - 9 46 16 -0.19 29 0 0 - 9 38 0 17 23 44.8 65 225 -21 - 9 45 46 - 9 30 13 - 9 51 41 - 9 24 17 -0.19 30 0 0 - 9 15 33 17 23 50.8 64 226 -22 - 9 23 21 - 9 7 46 - 9 29 17 - 9 1 49 -0.19 31 0 0 - 8 52 39 17 23 56.7 63 227 -23 - 9 0 27 - 8 44 50 - 9 6 24 - 8 38 52 -0.19 32 0 0 - 8 29 15 17 24 2.6 62 227 -24 - 8 37 5 - 8 21 26 - 8 43 3 - 8 15 27 -0.19 33 0 0 - 8 5 24 17 24 8.4 61 228 -26 - 8 13 15 - 7 57 33 - 8 19 14 - 7 51 33 -0.19 34 0 0 - 7 41 5 17 24 14.3 60 228 -27 - 7 48 57 - 7 33 13 - 7 54 57 - 7 27 12 -0.19 35 0 0 - 7 16 19 17 24 20.0 59 229 -28 - 7 24 12 - 7 8 25 - 7 30 13 - 7 2 24 -0.19 36 0 0 - 6 51 6 17 24 25.8 58 229 -29 - 6 59 0 - 6 43 11 - 7 5 2 - 6 37 9 -0.19 37 0 0 - 6 25 26 17 24 31.5 57 230 -30 - 6 33 21 - 6 17 30 - 6 39 24 - 6 11 27 -0.19 38 0 0 - 5 59 20 17 24 37.1 56 230 -31 - 6 7 17 - 5 51 23 - 6 13 21 - 5 45 19 -0.19 39 0 0 - 5 32 49 17 24 42.7 55 230 -32 - 5 40 46 - 5 24 51 - 5 46 51 - 5 18 45 -0.19 40 0 0 - 5 5 52 17 24 48.2 53 231 -33 - 5 13 51 - 4 57 53 - 5 19 57 - 4 51 47 -0.19 41 0 0 - 4 38 31 17 24 53.7 52 231 -34 - 4 46 31 - 4 30 31 - 4 52 38 - 4 24 24 -0.19 42 0 0 - 4 10 46 17 24 59.1 51 231 -35 - 4 18 47 - 4 2 44 - 4 24 54 - 3 56 36 -0.19 43 0 0 - 3 42 37 17 25 4.4 50 232 -37 - 3 50 40 - 3 34 35 - 3 56 48 - 3 28 26 -0.19 44 0 0 - 3 14 6 17 25 9.7 49 232 -38 - 3 22 9 - 3 6 2 - 3 28 18 - 2 59 53 -0.19 45 0 0 - 2 45 12 17 25 14.8 48 232 -39 - 2 53 17 - 2 37 8 - 2 59 27 - 2 30 57 -0.19 46 0 0 - 2 15 57 17 25 19.9 47 232 -40 - 2 24 3 - 2 7 51 - 2 30 14 - 2 1 40 -0.19 47 0 0 - 1 46 21 17 25 25.0 46 233 -41 - 1 54 28 - 1 38 14 - 2 0 39 - 1 32 2 -0.19 48 0 0 - 1 16 25 17 25 29.9 45 233 -42 - 1 24 33 - 1 8 17 - 1 30 45 - 1 2 5 -0.19 49 0 0 - 0 46 10 17 25 34.8 44 233 -43 - 0 54 19 - 0 38 1 - 1 0 32 - 0 31 47 -0.19 50 0 0 - 0 15 36 17 25 39.5 42 233 -44 - 0 23 46 - 0 7 26 - 0 29 59 - 0 1 12 -0.19 51 0 0 0 15 16 17 25 44.2 41 233 -45 0 7 5 0 23 27 0 0 51 0 29 42 -0.19 52 0 0 0 46 25 17 25 48.8 40 233 -46 0 38 13 0 54 36 0 31 58 1 0 52 -0.19 53 0 0 1 17 50 17 25 53.3 39 234 -48 1 9 37 1 26 2 1 3 21 1 32 19 -0.19 54 0 0 1 49 30 17 25 57.7 38 234 -49 1 41 16 1 57 43 1 35 0 2 4 0 -0.19 55 0 0 2 21 24 17 26 1.9 37 234 -50 2 13 10 2 29 38 2 6 53 2 35 56 -0.19 56 0 0 2 53 32 17 26 6.1 36 234 -51 2 45 17 3 1 47 2 39 0 3 8 5 -0.19 57 0 0 3 25 53 17 26 10.1 35 234 -52 3 17 37 3 34 8 3 11 19 3 40 27 -0.19 58 0 0 3 58 25 17 26 14.1 33 235 -53 3 50 9 4 6 41 3 43 50 4 13 1 -0.18 59 0 0 4 31 7 17 26 17.9 32 235 -54 4 22 51 4 39 25 4 16 31 4 45 44 -0.18 60 0 0 5 4 0 17 26 21.6 31 235 -55 4 55 42 5 12 18 4 49 23 5 18 38 -0.18 61 0 0 5 37 1 17 26 25.2 30 235 -56 5 28 43 5 45 19 5 22 23 5 51 40 -0.18 62 0 0 6 10 9 17 26 28.7 29 235 -57 6 1 51 6 18 28 5 55 30 6 24 49 -0.18 63 0 0 6 43 25 17 26 32.0 28 235 -58 6 35 6 6 51 44 6 28 45 6 58 5 -0.18 64 0 0 7 16 45 17 26 35.2 27 236 -60 7 8 26 7 25 5 7 2 5 7 31 27 -0.18 65 0 0 7 50 11 17 26 38.3 25 236 -61 7 41 51 7 58 31 7 35 30 8 4 53 -0.18 66 0 0 8 23 40 17 26 41.2 24 236 -62 8 15 20 8 32 0 8 8 58 8 38 22 -0.18 67 0 0 8 57 11 17 26 44.1 23 236 -63 8 48 51 9 5 32 8 42 29 9 11 54 -0.18 68 0 0 9 30 44 17 26 46.7 22 236 -64 9 22 23 9 39 5 9 16 1 9 45 27 -0.18 69 0 0 10 4 17 17 26 49.3 21 237 -65 9 55 56 10 12 38 9 49 34 10 19 1 -0.18 70 0 0 10 37 50 17 26 51.7 20 237 -66 10 29 29 10 46 11 10 23 6 10 52 34 -0.18 71 0 0 11 11 21 17 26 54.0 19 237 -67 11 3 0 11 19 42 10 56 37 11 26 5 -0.18 72 0 0 11 44 49 17 26 56.2 17 237 -68 11 36 28 11 53 10 11 30 5 11 59 33 -0.18 73 0 0 12 18 13 17 26 58.2 16 237 -69 12 9 52 12 26 35 12 3 30 12 32 58 -0.18 74 0 0 12 51 33 17 27 0.0 15 238 -69 12 43 12 12 59 54 12 36 50 13 6 17 -0.18 75 0 0 13 24 47 17 27 1.8 14 238 -70 13 16 27 13 33 8 13 10 4 13 39 31 -0.18 76 0 0 13 57 55 17 27 3.4 13 238 -71 13 49 34 14 6 16 13 43 12 14 12 38 -0.18 77 0 0 14 30 55 17 27 4.9 12 238 -72 14 22 34 14 39 15 14 16 12 14 45 38 -0.18 78 0 0 15 3 46 17 27 6.2 11 239 -73 14 55 26 15 12 7 14 49 4 15 18 29 -0.18 79 0 0 15 36 28 17 27 7.4 10 239 -74 15 28 8 15 44 48 15 21 46 15 51 10 -0.18 80 0 0 16 8 59 17 27 8.5 9 239 -74 16 0 40 16 17 19 15 54 19 16 23 41 -0.18 81 0 0 16 41 20 17 27 9.4 7 239 -75 16 33 0 16 49 39 16 26 39 16 56 0 -0.18 82 0 0 17 13 28 17 27 10.2 6 240 -75 17 5 9 17 21 47 16 58 48 17 28 8 -0.17 83 0 0 17 45 23 17 27 10.9 5 240 -76 17 37 4 17 53 41 17 30 44 18 0 2 -0.17 84 0 0 18 17 4 17 27 11.4 4 240 -76 18 8 46 18 25 22 18 2 26 18 31 42 -0.17 85 0 0 18 48 31 17 27 11.8 3 241 -77 18 40 14 18 56 48 18 33 54 19 3 8 -0.16 86 0 0 19 19 42 17 27 12.1 2 241 -77 19 11 26 19 27 59 19 5 7 19 34 18 -0.15 87 0 0 19 50 38 17 27 12.3 1 241 -77 19 42 22 19 58 54 19 36 3 20 5 13 -0.12 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 318-231928 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 42 03.7889 DE: -26 31 05.644 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 42 03.7887 DE: -26 31 05.644 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 11.8 * B mag [mag]: 12.3 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1209) Pumma asteroid class: approx. diameter [km]: 26 approx. diameter ["]: 0.013 distance from Earth [AU]: 2.70500 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#61 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): 0.021", 0.004", 87.341° remarks: * orbital elements for (1209)Pumma : Mean anomaly = 36.9917756742 deg Arg. of pericenter = 176.6786289731 deg Long. of node = 89.7397085113 deg Inclination = 6.9370561100 deg Eccentricity = 0.1268483125 Semimajor axis = 3.1705152701 AU Perihelion dist = 2.7683407582 AU Mag: H = 10.73, G = 0.15 Epoch of elements : MJD 60599.72330921 TDT (2024 Oct 16.7233) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#612023Apr24,1.43,2024,10,16,17.359431,-0.038249,0.188978,10.222865,2.082135,0.005685,0.000999,0.000000,0.000000 9.7866,-26.4614,-84.04,-9.25,False UCAC4 318-231928,19.70105250,-26.5182343,12.31,11.84,11.59,0.0,0,,19.72633477,-26.4614254,4.36,4.17,0,0,0 1209,Pumma,16.18,26.357,2.7050,0,0,2.475,6.77,,1.8,0 0,36.8655,2024,10,16,176.6786,89.7397,6.9371,0.12685,3.17052,2.76834,10.72,5.0,0.15 1.382,0.0213,0.0040,87,0.0051,Known errors,0.88,0,-1,-1 20241016_231928,60140.64 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:20 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org