IOTA/IOTA-ES occultation update for (203) Pompeja / UCAC4 319-135465 event on 2023 Mar 02, 09:08 UT Visible from South America Summary ------- On 2023 Mar 02 UT, the 117.6 km diameter asteroid (203) Pompeja will occult a 10.1 mag star in the constellation Sagittarius for observers along a path across South America. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.49 mag to 14.60 mag (the magnitude of the asteroid) for at most 4.320 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 Mar 02, 09:04 - 2023 Mar 02, 09:12 * geocentric midpoint of event [JD]: 2460005.88070350 * magnitude of target star: 10.13 * magnitude drop [mag]: 4.49 * estimated maximum duration [s]: 4.320 * Moon: 78 % sunlit, 167° distance * Sun: 70° distance * rough path description: South America The occultation path -------------------- * approximate projected width [km]: 118 * 1 sigma uncertainty interval [path widths]: +/- 0.04 * 1 sigma uncertainty interval [seconds]: +/- 0.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.011, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.011", 0.002", 88°) * approx speed of asteroid's shadow [km/s]: 27.2201 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 319-135465 by 203 Pompeja on 2023 Mar 2 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 -114 0 0 .. .. .... .. .. .. .. .. .. - 0 37 34 .. .. .. - 0 40 11 .. .. .. .... -113 0 0 - 0 31 54 9 4 18.5 1 116 -69 - 1 7 34 0 3 45 - 1 10 11 0 6 22 .... -112 0 0 - 1 1 56 9 4 18.7 2 116 -67 - 1 37 37 - 0 26 17 - 1 40 14 - 0 23 39 0.10 -111 0 0 - 1 32 0 9 4 18.9 3 116 -66 - 2 7 41 - 0 56 20 - 2 10 18 - 0 53 43 0.08 -110 0 0 - 2 2 4 9 4 19.2 4 116 -65 - 2 37 46 - 1 26 24 - 2 40 23 - 1 23 47 0.07 -109 0 0 - 2 32 9 9 4 19.5 5 116 -64 - 3 7 51 - 1 56 29 - 3 10 28 - 1 53 52 0.06 -108 0 0 - 3 2 14 9 4 20.0 7 116 -63 - 3 37 55 - 2 26 33 - 3 40 32 - 2 23 56 0.06 -107 0 0 - 3 32 16 9 4 20.6 8 116 -62 - 4 7 57 - 2 56 36 - 4 10 35 - 2 53 59 0.06 -106 0 0 - 4 2 17 9 4 21.2 9 116 -61 - 4 37 57 - 3 26 37 - 4 40 35 - 3 24 0 0.05 -105 0 0 - 4 32 14 9 4 22.0 10 116 -60 - 5 7 54 - 3 56 35 - 5 10 31 - 3 53 58 0.05 -104 0 0 - 5 2 8 9 4 22.8 11 116 -59 - 5 37 47 - 4 26 30 - 5 40 24 - 4 23 53 0.05 -103 0 0 - 5 31 56 9 4 23.7 12 116 -57 - 6 7 35 - 4 56 19 - 6 10 12 - 4 53 42 0.05 -102 0 0 - 6 1 39 9 4 24.7 13 116 -56 - 6 37 17 - 5 26 3 - 6 39 54 - 5 23 26 0.05 -101 0 0 - 6 31 16 9 4 25.8 14 116 -55 - 7 6 52 - 5 55 41 - 7 9 29 - 5 53 4 0.05 -100 0 0 - 7 0 46 9 4 27.0 15 116 -54 - 7 36 20 - 6 25 12 - 7 38 57 - 6 22 35 0.05 - 99 0 0 - 7 30 7 9 4 28.2 17 115 -53 - 8 5 40 - 6 54 35 - 8 8 17 - 6 51 59 0.05 - 98 0 0 - 7 59 20 9 4 29.5 18 115 -52 - 8 34 51 - 7 23 50 - 8 37 28 - 7 21 13 0.05 - 97 0 0 - 8 28 23 9 4 31.0 19 115 -51 - 9 3 53 - 7 52 55 - 9 6 29 - 7 50 19 0.05 - 96 0 0 - 8 57 16 9 4 32.5 20 115 -50 - 9 32 44 - 8 21 50 - 9 35 20 - 8 19 14 0.05 - 95 0 0 - 9 25 58 9 4 34.0 21 115 -49 -10 1 24 - 8 50 34 -10 4 0 - 8 47 58 0.05 - 94 0 0 - 9 54 29 9 4 35.7 22 115 -47 -10 29 52 - 9 19 7 -10 32 28 - 9 16 31 0.04 - 93 0 0 -10 22 47 9 4 37.4 23 114 -46 -10 58 7 - 9 47 27 -11 0 43 - 9 44 51 0.04 - 92 0 0 -10 50 51 9 4 39.2 24 114 -45 -11 26 9 -10 15 34 -11 28 45 -10 12 59 0.04 - 91 0 0 -11 18 42 9 4 41.1 25 114 -44 -11 53 57 -10 43 28 -11 56 33 -10 40 53 0.04 - 90 0 0 -11 46 19 9 4 43.0 26 114 -43 -12 21 31 -11 11 7 -12 24 6 -11 8 32 0.04 - 89 0 0 -12 13 40 9 4 45.0 28 114 -42 -12 48 50 -11 38 31 -12 51 25 -11 35 57 0.04 - 88 0 0 -12 40 46 9 4 47.1 29 113 -41 -13 15 52 -12 5 40 -13 18 27 -12 3 6 0.04 - 87 0 0 -13 7 35 9 4 49.3 30 113 -40 -13 42 38 -12 32 33 -13 45 13 -12 29 58 0.04 - 86 0 0 -13 34 8 9 4 51.5 31 113 -39 -14 9 8 -12 59 9 -14 11 42 -12 56 34 0.04 - 85 0 0 -14 0 23 9 4 53.8 32 113 -38 -14 35 19 -13 25 27 -14 37 53 -13 22 53 0.04 - 84 0 0 -14 26 20 9 4 56.1 33 112 -37 -15 1 13 -13 51 27 -15 3 47 -13 48 54 0.04 - 83 0 0 -14 51 58 9 4 58.5 34 112 -36 -15 26 48 -14 17 10 -15 29 22 -14 14 36 0.04 - 82 0 0 -15 17 18 9 5 1.0 35 112 -35 -15 52 4 -14 42 33 -15 54 37 -14 40 0 0.04 - 81 0 0 -15 42 18 9 5 3.5 36 112 -33 -16 17 0 -15 7 37 -16 19 33 -15 5 4 0.04 - 80 0 0 -16 6 58 9 5 6.1 37 111 -32 -16 41 37 -15 32 20 -16 44 9 -15 29 48 0.04 - 79 0 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Uncertainty in time = +/- 1 secs Prediction of 2023 Feb 15.9 Data for the target star ------------------------ * name: UCAC4 319-135465 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 07 25.1817 DE: -26 23 27.028 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 07 25.1818 DE: -26 23 27.028 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.700,0.500) * V mag [mag]: 10.1 * 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]: 3.07500 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#130 date of fit: 2023 Feb 07 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): 0.011", 0.002", 88.234° remarks: * orbital elements for (203)Pompeja : Mean anomaly = 208.1225530864 deg Arg. of pericenter = 60.0425423064 deg Long. of node = 347.7087176146 deg Inclination = 3.1718301130 deg Eccentricity = 0.0595606750 Semimajor axis = 2.7368701077 AU Perihelion dist = 2.5738602768 AU Mag: H = 8.89, G = 0.15 Epoch of elements : MJD 60005.38069444 TDT (2023 Mar 02.3807) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1302023Feb07,4.32,2023,3,2,9.136884,-0.000589,-0.032538,15.356749,-0.464597,-0.005505,-0.000191,0.000000,0.000000 -24.7458,-26.3882,46.00,-7.24,False UCAC4 319-135465,18.12366156,-26.3908412,0.00,10.13,0.00,0.0,4,,18.14737077,-26.3881891,4.49,0.00,0,0,0 203,Pompeja,14.60,117.6,3.0750,0,0,3.269,-1.33,,6.8,0 0,208.0397,2023,3,2,60.0425,347.7087,3.1718,0.05956,2.73687,2.57386,8.90,5.0,0.15 1.037,0.0107,0.0018,88,0.0019,Known errors,-1.00,-1,-1,-1 20230302_135465,59990.86 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Feb 15, 20:42 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org