IOTA/IOTA-ES occultation update for (1243) Pamela / UCAC4-511-028950 event on 2022 Dec 29, 16:07 UT Visible from Australia Summary ------- On 2022 Dec 29 UT, the 68.5 km diameter asteroid (1243) Pamela will occult a 12.4 mag star in the constellation Gemini for observers along a path across Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.16 mag to 14.39 mag (the magnitude of the asteroid) for at most 4.660 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: 94 * date and approx. time of event: 2022 Dec 29, 16:01 - 2022 Dec 29, 16:13 * geocentric midpoint of event [JD]: 2459943.17208333 * magnitude of target star: 12.39 * magnitude drop [mag]: 2.16 * estimated maximum duration [s]: 4.660 * Moon: 46 % sunlit, 97° distance * Sun: 169° distance * rough path description: Australia The occultation path -------------------- * approximate projected width [km]: 82 * 1 sigma uncertainty interval [path widths]: +/- 0.45 * 1 sigma uncertainty interval [seconds]: +/- 2.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.025, +/- 0.018) * 1 sigma uncertainty ellipse (major, minor, PA): (0.025", 0.017", 106°) * approx speed of asteroid's shadow [km/s]: 14.7069 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4-511-028950 by 1243 Pamela on 2022 Dec 29 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 41 0 0 -41 0 6 16 13 48.8 0 74 5 -40 36 53 -41 23 26 -40 15 55 -41 44 41 .... 42 0 0 -40 46 48 16 13 48.7 1 73 4 -40 23 34 -41 10 8 -40 2 35 -41 31 25 0.34 43 0 0 -40 33 20 16 13 48.5 2 72 4 -40 10 6 -40 56 42 -39 49 5 -41 17 59 0.47 44 0 0 -40 19 44 16 13 48.2 3 72 3 -39 56 29 -40 43 7 -39 35 28 -41 4 25 0.53 45 0 0 -40 6 0 16 13 47.8 4 71 2 -39 42 43 -40 29 23 -39 21 42 -40 50 42 0.56 46 0 0 -39 52 7 16 13 47.3 4 70 1 -39 28 50 -40 15 31 -39 7 47 -40 36 51 0.58 47 0 0 -39 38 7 16 13 46.7 5 70 0 -39 14 48 -40 1 31 -38 53 45 -40 22 52 0.60 48 0 0 -39 23 58 16 13 46.0 6 69 0 -39 0 39 -39 47 24 -38 39 35 -40 8 45 0.61 49 0 0 -39 9 42 16 13 45.2 7 68 -1 -38 46 23 -39 33 8 -38 25 18 -39 54 30 0.61 50 0 0 -38 55 19 16 13 44.3 8 68 -2 -38 31 59 -39 18 46 -38 10 54 -39 40 8 0.62 51 0 0 -38 40 49 16 13 43.3 8 67 -3 -38 17 28 -39 4 16 -37 56 22 -39 25 39 0.63 52 0 0 -38 26 11 16 13 42.2 9 67 -3 -38 2 50 -38 49 40 -37 41 44 -39 11 3 0.63 53 0 0 -38 11 28 16 13 40.9 10 66 -4 -37 48 6 -38 34 57 -37 26 59 -38 56 21 0.63 54 0 0 -37 56 38 16 13 39.6 11 65 -5 -37 33 16 -38 20 7 -37 12 9 -38 41 32 0.64 55 0 0 -37 41 42 16 13 38.1 12 65 -6 -37 18 19 -38 5 12 -36 57 12 -38 26 37 0.64 56 0 0 -37 26 41 16 13 36.6 12 64 -7 -37 3 17 -37 50 11 -36 42 9 -38 11 36 0.64 57 0 0 -37 11 34 16 13 34.9 13 63 -7 -36 48 10 -37 35 4 -36 27 2 -37 56 30 0.64 58 0 0 -36 56 22 16 13 33.1 14 63 -8 -36 32 58 -37 19 52 -36 11 49 -37 41 18 0.64 59 0 0 -36 41 5 16 13 31.2 15 62 -9 -36 17 40 -37 4 35 -35 56 32 -37 26 2 0.65 60 0 0 -36 25 43 16 13 29.2 16 62 -10 -36 2 19 -36 49 14 -35 41 10 -37 10 41 0.65 61 0 0 -36 10 17 16 13 27.1 17 61 -11 -35 46 53 -36 33 49 -35 25 44 -36 55 15 0.65 62 0 0 -35 54 48 16 13 24.9 17 60 -11 -35 31 23 -36 18 19 -35 10 14 -36 39 46 0.65 63 0 0 -35 39 14 16 13 22.5 18 60 -12 -35 15 49 -36 2 46 -34 54 40 -36 24 12 0.65 64 0 0 -35 23 37 16 13 20.1 19 59 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51 33 16 11 43.5 39 41 -31 -28 28 21 -29 14 52 -28 7 24 -29 36 6 0.66 90 0 0 -28 36 27 16 11 38.3 40 40 -32 -28 13 17 -28 59 45 -27 52 20 -29 20 59 0.66 91 0 0 -28 21 27 16 11 33.0 41 39 -33 -27 58 18 -28 44 44 -27 37 22 -29 5 57 0.66 92 0 0 -28 6 33 16 11 27.7 41 38 -33 -27 43 25 -28 29 49 -27 22 30 -28 51 1 0.66 93 0 0 -27 51 46 16 11 22.3 42 37 -34 -27 28 38 -28 15 0 -27 7 44 -28 36 11 0.66 94 0 0 -27 37 5 16 11 16.8 43 36 -34 -27 13 58 -28 0 18 -26 53 5 -28 21 28 0.66 95 0 0 -27 22 31 16 11 11.2 44 35 -35 -26 59 25 -27 45 43 -26 38 33 -28 6 52 0.66 96 0 0 -27 8 4 16 11 5.5 44 34 -36 -26 45 0 -27 31 15 -26 24 9 -27 52 23 0.66 97 0 0 -26 53 45 16 10 59.8 45 33 -36 -26 30 42 -27 16 55 -26 9 52 -27 38 2 0.66 98 0 0 -26 39 34 16 10 53.9 46 32 -37 -26 16 32 -27 2 43 -25 55 43 -27 23 49 0.66 99 0 0 -26 25 31 16 10 48.0 46 31 -37 -26 2 30 -26 48 39 -25 41 42 -27 9 44 0.66 100 0 0 -26 11 37 16 10 42.1 47 30 -38 -25 48 37 -26 34 43 -25 27 50 -26 55 47 0.66 101 0 0 -25 57 51 16 10 36.0 47 29 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13 -20 16 42 0.67 175 0 0 -19 38 42 16 2 56.1 29 297 -21 -19 16 19 -20 1 10 -18 56 6 -20 21 38 0.67 176 0 0 -19 43 53 16 2 52.0 29 297 -20 -19 21 30 -20 6 22 -19 1 17 -20 26 51 0.67 177 0 0 -19 49 22 16 2 48.0 28 296 -20 -19 26 58 -20 11 51 -19 6 44 -20 32 21 0.67 178 0 0 -19 55 7 16 2 44.1 27 296 -19 -19 32 43 -20 17 38 -19 12 28 -20 38 8 0.67 179 0 0 -20 1 10 16 2 40.4 26 295 -18 -19 38 44 -20 23 41 -19 18 28 -20 44 12 0.68 180 0 0 -20 7 28 16 2 36.7 25 295 -17 -19 45 2 -20 30 0 -19 24 46 -20 50 32 0.68 -179 0 0 -20 14 4 16 2 33.2 24 294 -16 -19 51 37 -20 36 37 -19 31 20 -20 57 10 0.68 -178 0 0 -20 20 56 16 2 29.8 23 294 -16 -19 58 28 -20 43 30 -19 38 10 -21 4 3 0.68 -177 0 0 -20 28 4 16 2 26.5 22 293 -15 -20 5 35 -20 50 39 -19 45 16 -21 11 13 0.68 -176 0 0 -20 35 29 16 2 23.4 21 293 -14 -20 12 59 -20 58 4 -19 52 39 -21 18 40 0.68 -175 0 0 -20 43 9 16 2 20.3 21 292 -13 -20 20 39 -21 5 46 -20 0 18 -21 26 23 0.68 -174 0 0 -20 51 7 16 2 17.4 20 292 -12 -20 28 35 -21 13 44 -20 8 13 -21 34 22 0.68 -173 0 0 -20 59 20 16 2 14.6 19 292 -11 -20 36 47 -21 21 58 -20 16 24 -21 42 36 0.68 -172 0 0 -21 7 48 16 2 12.0 18 291 -10 -20 45 14 -21 30 28 -20 24 51 -21 51 7 0.68 -171 0 0 -21 16 32 16 2 9.5 17 291 -9 -20 53 57 -21 39 13 -20 33 33 -21 59 53 0.68 -170 0 0 -21 25 32 16 2 7.1 16 290 -9 -21 2 56 -21 48 14 -20 42 30 -22 8 55 0.68 -169 0 0 -21 34 47 16 2 4.8 15 290 -8 -21 12 9 -21 57 30 -20 51 43 -22 18 12 0.68 -168 0 0 -21 44 17 16 2 2.6 14 289 -7 -21 21 38 -22 7 1 -21 1 11 -22 27 44 0.69 -167 0 0 -21 54 2 16 2 0.6 13 289 -6 -21 31 22 -22 16 47 -21 10 54 -22 37 32 0.69 -166 0 0 -22 4 2 16 1 58.8 12 289 -5 -21 41 21 -22 26 48 -21 20 52 -22 47 34 0.69 -165 0 0 -22 14 16 16 1 57.0 11 288 -4 -21 51 34 -22 37 4 -21 31 4 -22 57 51 0.69 -164 0 0 -22 24 45 16 1 55.4 10 288 -3 -22 2 2 -22 47 34 -21 41 31 -23 8 22 0.69 -163 0 0 -22 35 29 16 1 53.9 10 287 -2 -22 12 44 -22 58 19 -21 52 12 -23 19 8 0.69 -162 0 0 -22 46 26 16 1 52.6 9 287 -1 -22 23 40 -23 9 18 -22 3 7 -23 30 8 0.70 -161 0 0 -22 57 37 16 1 51.4 8 287 -1 -22 34 50 -23 20 30 -22 14 15 -23 41 21 0.70 -160 0 0 -23 9 2 16 1 50.3 7 286 0 -22 46 14 -23 31 56 -22 25 38 -23 52 48 0.70 -159 0 0 -23 20 40 16 1 49.4 6 286 1 -22 57 51 -23 43 35 -22 37 14 -24 4 29 0.71 -158 0 0 -23 32 31 16 1 48.6 5 285 2 -23 9 41 -23 55 28 -22 49 3 -24 16 23 0.72 -157 0 0 -23 44 36 16 1 48.0 4 285 3 -23 21 44 -24 7 34 -23 1 5 -24 28 30 0.73 -156 0 0 -23 56 53 16 1 47.5 3 285 4 -23 34 0 -24 19 52 -23 13 19 -24 40 49 0.74 -155 0 0 -24 9 22 16 1 47.1 2 284 5 -23 46 28 -24 32 23 -23 25 46 -24 53 21 0.78 -154 0 0 -24 22 4 16 1 46.9 1 284 6 -23 59 8 -24 45 6 -23 38 25 -25 6 5 0.86 -153 0 0 -24 34 58 16 1 46.8 0 283 7 -24 12 1 -24 58 1 -23 51 17 -25 19 1 1.80 Uncertainty in time = +/- 3 secs Prediction of 2022 Dec 1.1 Data for the target star ------------------------ * name: UCAC4-511-028950 * constellation : Gemini * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 06 44 06.2435 DE: +12 08 48.033 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 06 44 06.2435 DE: +12 08 48.033 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 12.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1243) Pamela asteroid class: approx. diameter [km]: 69 approx. diameter ["]: 0.042 distance from Earth [AU]: 2.26130 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#55 date of fit: 2022 Nov 22 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): 0.025", 0.017", 106.007° remarks: * orbital elements for (1243)Pamela : Mean anomaly = 161.5255533126 deg Arg. of pericenter = 52.0222975186 deg Long. of node = 245.5358437783 deg Inclination = 13.2654416530 deg Eccentricity = 0.0460037308 Semimajor axis = 3.0955271379 AU Perihelion dist = 2.9531213407 AU Mag: H = 9.72, G = 0.15 Epoch of elements : MJD 59942.67201389 TDT (2022 Dec 29.6720) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#552022Nov22,4.66,2022,12,29,16.130000,0.081395,-0.546346,-8.210382,-1.223185,-0.000230,0.001165,0.000001,0.000000 121.3065,12.1235,-61.43,-23.20,False UCAC4-511-028950,6.73506763,12.1466760,0.00,12.39,0.00,0.0,0,,6.75671116,12.1234599,2.16,0.00,0,0,0 1243,Pamela,14.39,68.5,2.2613,0,0,-2.177,-4.76,,3.6,0 0,161.4039,2022,12,29,52.0223,245.5358,13.2654,0.04600,3.09553,2.95312,9.74,5.0,0.15 1.454,0.0253,0.0173,106,0.0189,Known errors,1.02,-1,-1,-1 20221229_028950,59914.09 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Dec 01, 02:06 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org