IOTA/IOTA-ES occultation update for (203) Pompeja / UCAC4 327-177399 event on 2023 Nov 03, 08:41 UT Visible from Australia Summary ------- On 2023 Nov 03 UT, the 117.6 km diameter asteroid (203) Pompeja will occult a 12.3 mag star in the constellation Sagittarius 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 2.31 mag to 14.48 mag (the magnitude of the asteroid) for at most 3.900 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: 100 * date and approx. time of event: 2023 Nov 03, 08:37 - 2023 Nov 03, 08:44 * geocentric midpoint of event [JD]: 2460251.86200880 * magnitude of target star: 12.31 * magnitude drop [mag]: 2.31 * estimated maximum duration [s]: 3.900 * Moon: 69 % sunlit, 175° distance * Sun: 64° distance * rough path description: Australia The occultation path -------------------- * approximate projected width [km]: 118 * 1 sigma uncertainty interval [path widths]: +/- 0.01 * 1 sigma uncertainty interval [seconds]: +/- 0.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.007, +/- 0.001) * 1 sigma uncertainty ellipse (major, minor, PA): (0.007", 0.000", 82°) * approx speed of asteroid's shadow [km/s]: 30.1903 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 327-177399 by 203 Pompeja on 2023 Nov 3 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 0 0 0 .. .. .... .. .. .. .. .. .. -13 33 38 .. .. .. -13 34 13 .. .. .. .... 19 0 0 -13 25 56 8 37 47.3 1 115 63 -14 1 23 -12 50 32 -14 1 58 -12 49 57 .... 20 0 0 -13 53 32 8 37 47.5 2 115 64 -14 28 56 -13 18 9 -14 29 31 -13 17 34 0.14 21 0 0 -14 20 53 8 37 47.7 3 115 65 -14 56 16 -13 45 34 -14 56 51 -13 44 59 0.13 22 0 0 -14 48 1 8 37 47.9 4 114 66 -15 23 21 -14 12 44 -15 23 56 -14 12 9 0.12 23 0 0 -15 14 55 8 37 48.2 5 114 67 -15 50 12 -14 39 40 -15 50 47 -14 39 5 0.12 24 0 0 -15 41 33 8 37 48.7 6 114 68 -16 16 47 -15 6 21 -16 17 22 -15 5 47 0.11 25 0 0 -16 7 56 8 37 49.1 7 114 69 -16 43 7 -15 32 47 -16 43 42 -15 32 12 0.11 26 0 0 -16 34 2 8 37 49.7 9 113 70 -17 9 10 -15 58 56 -17 9 45 -15 58 22 0.11 27 0 0 -16 59 52 8 37 50.3 10 113 71 -17 34 57 -16 24 49 -17 35 31 -16 24 14 0.11 28 0 0 -17 25 24 8 37 51.0 11 113 72 -18 0 26 -16 50 25 -18 1 0 -16 49 50 0.11 29 0 0 -17 50 38 8 37 51.7 12 112 73 -18 25 37 -17 15 42 -18 26 11 -17 15 8 0.10 30 0 0 -18 15 35 8 37 52.5 13 112 74 -18 50 30 -17 40 42 -18 51 4 -17 40 8 0.10 31 0 0 -18 40 12 8 37 53.4 14 112 75 -19 15 4 -18 5 23 -19 15 38 -18 4 49 0.10 32 0 0 -19 4 31 8 37 54.4 15 111 76 -19 39 18 -18 29 45 -19 39 53 -18 29 11 0.10 33 0 0 -19 28 29 8 37 55.4 16 111 76 -20 3 14 -18 53 47 -20 3 48 -18 53 13 0.10 34 0 0 -19 52 8 8 37 56.4 17 111 77 -20 26 49 -19 17 30 -20 27 23 -19 16 56 0.10 35 0 0 -20 15 27 8 37 57.6 18 110 78 -20 50 4 -19 40 52 -20 50 38 -19 40 18 0.10 36 0 0 -20 38 25 8 37 58.8 19 110 79 -21 12 58 -20 3 54 -21 13 32 -20 3 20 0.10 37 0 0 -21 1 2 8 38 0.0 20 110 79 -21 35 31 -20 26 35 -21 36 5 -20 26 1 0.10 38 0 0 -21 23 17 8 38 1.3 21 109 80 -21 57 42 -20 48 54 -21 58 16 -20 48 20 0.10 39 0 0 -21 45 11 8 38 2.7 22 109 80 -22 19 32 -21 10 52 -22 20 6 -21 10 18 0.10 40 0 0 -22 6 43 8 38 4.1 23 109 81 -22 41 0 -21 32 28 -22 41 34 -21 31 54 0.10 41 0 0 -22 27 52 8 38 5.5 24 108 81 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44 10 8 43 28.6 51 253 -12 -19 19 3 -18 9 19 -19 19 37 -18 8 44 0.10 155 0 0 -18 19 22 8 43 31.6 50 253 -13 -18 54 19 -17 44 27 -18 54 53 -17 43 53 0.10 156 0 0 -17 54 15 8 43 34.5 49 253 -14 -18 29 16 -17 19 17 -18 29 50 -17 18 43 0.10 157 0 0 -17 28 50 8 43 37.5 48 252 -16 -18 3 54 -16 53 48 -18 4 28 -16 53 13 0.10 158 0 0 -17 3 6 8 43 40.3 47 252 -17 -17 38 13 -16 28 1 -17 38 48 -16 27 26 0.10 159 0 0 -16 37 4 8 43 43.2 46 251 -18 -17 12 14 -16 1 56 -17 12 49 -16 1 21 0.10 160 0 0 -16 10 45 8 43 46.0 45 251 -19 -16 45 58 -15 35 33 -16 46 33 -15 34 58 0.10 161 0 0 -15 44 9 8 43 48.8 44 251 -20 -16 19 26 -15 8 54 -16 20 0 -15 8 19 0.10 162 0 0 -15 17 16 8 43 51.5 43 250 -21 -15 52 36 -14 41 59 -15 53 11 -14 41 24 0.10 163 0 0 -14 50 9 8 43 54.2 42 250 -22 -15 25 31 -14 14 48 -15 26 6 -14 14 13 0.10 164 0 0 -14 22 46 8 43 56.8 41 250 -23 -14 58 11 -13 47 22 -14 58 46 -13 46 48 0.10 165 0 0 -13 55 8 8 43 59.4 40 249 -24 -14 30 36 -13 19 42 -14 31 11 -13 19 7 0.10 166 0 0 -13 27 17 8 44 1.9 38 249 -25 -14 2 48 -12 51 49 -14 3 23 -12 51 14 0.10 167 0 0 -12 59 13 8 44 4.4 37 249 -26 -13 34 46 -12 23 42 -13 35 21 -12 23 7 0.10 168 0 0 -12 30 56 8 44 6.8 36 248 -27 -13 6 31 -11 55 23 -13 7 6 -11 54 48 0.10 169 0 0 -12 2 28 8 44 9.2 35 248 -28 -12 38 5 -11 26 53 -12 38 40 -11 26 18 0.10 170 0 0 -11 33 48 8 44 11.5 34 248 -30 -12 9 27 -10 58 11 -12 10 2 -10 57 36 0.10 171 0 0 -11 4 58 8 44 13.7 33 248 -31 -11 40 39 -10 29 20 -11 41 14 -10 28 45 0.10 172 0 0 -10 35 59 8 44 15.9 32 247 -32 -11 11 41 -10 0 19 -11 12 16 - 9 59 44 0.10 173 0 0 -10 6 51 8 44 18.1 31 247 -33 -10 42 34 - 9 31 9 -10 43 10 - 9 30 34 0.10 174 0 0 - 9 37 34 8 44 20.1 30 247 -34 -10 13 19 - 9 1 52 -10 13 55 - 9 1 17 0.10 175 0 0 - 9 8 11 8 44 22.1 29 247 -35 - 9 43 57 - 8 32 27 - 9 44 32 - 8 31 52 0.10 176 0 0 - 8 38 41 8 44 24.1 27 247 -36 - 9 14 28 - 8 2 56 - 9 15 3 - 8 2 21 0.10 177 0 0 - 8 9 5 8 44 25.9 26 246 -37 - 8 44 53 - 7 33 20 - 8 45 28 - 7 32 45 0.10 178 0 0 - 7 39 25 8 44 27.7 25 246 -38 - 8 15 13 - 7 3 39 - 8 15 49 - 7 3 3 0.11 179 0 0 - 7 9 40 8 44 29.4 24 246 -40 - 7 45 29 - 6 33 54 - 7 46 4 - 6 33 19 0.11 180 0 0 - 6 39 53 8 44 31.1 23 246 -41 - 7 15 42 - 6 4 6 - 7 16 17 - 6 3 31 0.11 -179 0 0 - 6 10 2 8 44 32.7 22 246 -42 - 6 45 52 - 5 34 16 - 6 46 27 - 5 33 40 0.11 -178 0 0 - 5 40 11 8 44 34.2 21 246 -43 - 6 16 0 - 5 4 24 - 6 16 35 - 5 3 49 0.11 -177 0 0 - 5 10 18 8 44 35.6 20 246 -44 - 5 46 7 - 4 34 32 - 5 46 42 - 4 33 56 0.11 -176 0 0 - 4 40 26 8 44 37.0 19 246 -45 - 5 16 14 - 4 4 40 - 5 16 50 - 4 4 5 0.11 -175 0 0 - 4 10 34 8 44 38.3 17 245 -46 - 4 46 22 - 3 34 49 - 4 46 58 - 3 34 14 0.11 -174 0 0 - 3 40 45 8 44 39.5 16 245 -47 - 4 16 32 - 3 5 0 - 4 17 7 - 3 4 25 0.11 -173 0 0 - 3 10 58 8 44 40.6 15 245 -48 - 3 46 44 - 2 35 14 - 3 47 19 - 2 34 39 0.11 -172 0 0 - 2 41 14 8 44 41.6 14 245 -50 - 3 16 59 - 2 5 31 - 3 17 35 - 2 4 56 0.11 -171 0 0 - 2 11 35 8 44 42.6 13 245 -51 - 2 47 19 - 1 35 53 - 2 47 54 - 1 35 18 0.11 -170 0 0 - 1 42 0 8 44 43.5 12 245 -52 - 2 17 43 - 1 6 20 - 2 18 18 - 1 5 45 0.12 -169 0 0 - 1 12 32 8 44 44.3 11 245 -53 - 1 48 13 - 0 36 53 - 1 48 48 - 0 36 18 0.12 -168 0 0 - 0 43 10 8 44 45.0 10 245 -54 - 1 18 49 - 0 7 33 - 1 19 24 - 0 6 58 0.12 -167 0 0 - 0 13 55 8 44 45.7 9 245 -55 - 0 49 33 0 21 40 - 0 50 8 0 22 15 0.12 -166 0 0 0 15 11 8 44 46.3 7 245 -56 - 0 20 24 0 50 44 - 0 20 59 0 51 19 0.13 -165 0 0 0 44 9 8 44 46.8 6 245 -57 0 8 35 1 19 40 0 8 0 1 20 15 0.13 -164 0 0 1 12 57 8 44 47.2 5 245 -58 0 37 25 1 48 25 0 36 50 1 49 0 0.14 -163 0 0 1 41 34 8 44 47.5 4 245 -60 1 6 5 2 17 0 1 5 30 2 17 35 0.15 -162 0 0 2 10 0 8 44 47.8 3 245 -61 1 34 34 2 45 24 1 33 59 2 45 59 0.17 -161 0 0 2 38 15 8 44 47.9 2 245 -62 2 2 51 3 13 36 2 2 16 3 14 11 0.20 -160 0 0 3 6 17 8 44 48.0 1 245 -63 2 30 56 3 41 35 2 30 21 3 42 10 0.35 Uncertainty in time = +/- 1 secs Prediction of 2023 Oct 15.9 Data for the target star ------------------------ * name: UCAC4 327-177399 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 01 56.2952 DE: -24 42 47.122 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 01 56.2952 DE: -24 42 47.122 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 12.3 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (203) Pompeja asteroid class: approx. diameter [km]: 118 approx. diameter ["]: 0.053 distance from Earth [AU]: 3.06220 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#135 date of fit: 2023 Oct 09 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): 0.007", 0.000", 82.263° remarks: * orbital elements for (203)Pompeja : Mean anomaly = 261.5030484693 deg Arg. of pericenter = 60.2290070969 deg Long. of node = 347.7007068015 deg Inclination = 3.1719917004 deg Eccentricity = 0.0597414580 Semimajor axis = 2.7361957687 AU Perihelion dist = 2.5727314440 AU Mag: H = 8.97, G = 0.15 Epoch of elements : MJD 60251.36194444 TDT (2023 Nov 03.3619) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1352023Oct09,3.90,2023,11,3,8.688211,0.013738,-0.090044,16.831230,2.660950,0.005217,0.000476,-0.000001,0.000000 113.1664,-24.6802,45.57,-15.02,False UCAC4 327-177399,19.03230427,-24.7130893,0.00,12.31,0.00,0.0,0,,19.05624962,-24.6801869,2.31,0.00,0,0,0 203,Pompeja,14.48,117.600,3.0622,0,0,3.547,7.64,,6.8,0 0,261.4242,2023,11,3,60.2290,347.7007,3.1720,0.05974,2.73620,2.57273,8.88,5.0,0.15 1.008,0.0073,0.0004,82,0.0073,Known errors,-1.00,0,-1,-1 20231103_177399,60232.88 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Oct 15, 21:00 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org