IOTA/IOTA-ES occultation update for (203) Pompeja / UCAC4 313-236395 event on 2023 Jun 03, 08:28 UT Visible from South America Summary ------- On 2023 Jun 03 UT, the 117.6 km diameter asteroid (203) Pompeja will occult a 12.4 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 1.26 mag to 13.24 mag (the magnitude of the asteroid) for at most 13.910 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 Jun 03, 08:15 - 2023 Jun 03, 08:41 * geocentric midpoint of event [JD]: 2460098.85333242 * magnitude of target star: 12.39 * magnitude drop [mag]: 1.26 * estimated maximum duration [s]: 13.910 * Moon: 99 % sunlit, 40° distance * Sun: 151° distance * rough path description: South America The occultation path -------------------- * approximate projected width [km]: 118 * 1 sigma uncertainty interval [path widths]: +/- 0.03 * 1 sigma uncertainty interval [seconds]: +/- 2.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.016, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.016", 0.003", 83°) * approx speed of asteroid's shadow [km/s]: 8.4520 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 313-236395 by 203 Pompeja on 2023 Jun 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 164 0 0 -13 51 36 8 41 18.9 0 118 -28 .. .. .. -14 27 57 .. .. .. -14 30 22 .... 165 0 0 -14 23 6 8 41 18.7 1 118 -29 -13 46 50 -14 59 23 -13 44 26 -15 1 48 0.16 166 0 0 -14 54 17 8 41 18.2 2 118 -30 -14 18 5 -15 30 31 -14 15 41 -15 32 56 0.12 167 0 0 -15 25 10 8 41 17.5 3 118 -31 -14 49 2 -16 1 20 -14 46 38 -16 3 45 0.11 168 0 0 -15 55 45 8 41 16.5 5 117 -32 -15 19 40 -16 31 51 -15 17 16 -16 34 15 0.10 169 0 0 -16 25 59 8 41 15.2 6 117 -33 -15 49 59 -17 2 1 -15 47 35 -17 4 25 0.09 170 0 0 -16 55 54 8 41 13.7 7 117 -34 -16 19 57 -17 31 52 -16 17 34 -17 34 16 0.09 171 0 0 -17 25 27 8 41 11.9 8 116 -35 -16 49 35 -18 1 21 -16 47 12 -18 3 45 0.09 172 0 0 -17 54 40 8 41 9.9 9 116 -36 -17 18 52 -18 30 30 -17 16 29 -18 32 53 0.09 173 0 0 -18 23 31 8 41 7.6 10 116 -37 -17 47 47 -18 59 16 -17 45 25 -19 1 39 0.08 174 0 0 -18 51 59 8 41 5.1 11 116 -38 -18 16 20 -19 27 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6 29 8 16 35.5 13 242 16 - 1 30 3 - 2 42 57 - 1 27 37 - 2 45 23 0.09 - 15 0 0 - 1 33 31 8 16 32.4 12 242 17 - 0 57 6 - 2 9 58 - 0 54 41 - 2 12 24 0.09 - 14 0 0 - 1 0 38 8 16 29.5 11 242 19 - 0 24 14 - 1 37 3 - 0 21 49 - 1 39 29 0.09 - 13 0 0 - 0 27 49 8 16 26.9 9 242 20 0 8 34 - 1 4 13 0 10 59 - 1 6 38 0.09 - 12 0 0 0 4 55 8 16 24.6 8 242 21 0 41 16 - 0 31 28 0 43 41 - 0 33 53 0.09 - 11 0 0 0 37 32 8 16 22.6 7 242 22 1 13 51 0 1 11 1 16 16 - 0 1 15 0.10 - 10 0 0 1 10 1 8 16 20.9 6 242 23 1 46 18 0 33 42 1 48 43 0 31 17 0.10 - 9 0 0 1 42 22 8 16 19.5 5 242 24 2 18 37 1 6 5 2 21 2 1 3 40 0.11 - 8 0 0 2 14 33 8 16 18.3 4 242 25 2 50 46 1 38 19 2 53 11 1 35 54 0.12 - 7 0 0 2 46 35 8 16 17.5 3 242 26 3 22 45 2 10 22 3 25 9 2 7 58 0.15 - 6 0 0 3 18 25 8 16 17.0 2 242 28 3 54 32 2 42 15 3 56 57 2 39 51 0.20 - 5 0 0 3 50 3 8 16 16.7 0 242 29 4 26 8 3 13 56 4 28 32 3 11 32 0.60 Uncertainty in time = +/- 3 secs Prediction of 2023 Apr 29.2 Data for the target star ------------------------ * name: UCAC4 313-236395 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 50 34.1738 DE: -27 31 24.487 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 50 34.1738 DE: -27 31 24.487 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 12.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (203) Pompeja asteroid class: approx. diameter [km]: 118 approx. diameter ["]: 0.084 distance from Earth [AU]: 1.92250 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#131 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): 0.016", 0.003", 83.041° remarks: * orbital elements for (203)Pompeja : Mean anomaly = 228.3114210164 deg Arg. of pericenter = 60.0958632478 deg Long. of node = 347.7054361476 deg Inclination = 3.1718393391 deg Eccentricity = 0.0596229313 Semimajor axis = 2.7366605911 AU Perihelion dist = 2.5734928646 AU Mag: H = 8.88, G = 0.15 Epoch of elements : MJD 60098.35333333 TDT (2023 Jun 03.3533) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1312023Apr24,13.91,2023,6,3,8.479978,0.016659,-0.094279,-4.698306,-0.826955,-0.002714,0.000146,0.000001,0.000000 -95.7295,-27.4961,52.34,22.30,False UCAC4 313-236395,18.84282604,-27.5234686,0.00,12.39,0.00,0.0,4,,18.86741717,-27.4960717,1.26,0.00,0,0,0 203,Pompeja,13.24,117.6,1.9225,0,0,-1.615,-3.78,,6.8,0 0,228.2345,2023,6,3,60.0959,347.7054,3.1718,0.05962,2.73666,2.57349,8.90,5.0,0.15 1.033,0.0163,0.0027,83,0.0028,Known errors,-1.00,-1,-1,-1 20230603_236395,60063.19 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Apr 29, 04:33 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org