IOTA/IOTA-ES occultation update for (223) Rosa / UCAC4 530-050332 event on 2023 Jun 04, 08:40 UT Visible from New Zealand, Australia Summary ------- On 2023 Jun 04 UT, the 80.7 km diameter asteroid (223) Rosa will occult a 12.1 mag star in the constellation Leo for observers along a path across New Zealand, Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.48 mag to 15.54 mag (the magnitude of the asteroid) for at most 2.830 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: 99 * date and approx. time of event: 2023 Jun 04, 08:37 - 2023 Jun 04, 08:44 * geocentric midpoint of event [JD]: 2460099.86159771 * magnitude of target star: 12.11 * magnitude drop [mag]: 3.48 * estimated maximum duration [s]: 2.830 * Moon: 100 % sunlit, 114° distance * Sun: 68° distance * rough path description: New Zealand, Australia The occultation path -------------------- * approximate projected width [km]: 88 * 1 sigma uncertainty interval [path widths]: +/- 0.24 * 1 sigma uncertainty interval [seconds]: +/- 1.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.016, +/- 0.010) * 1 sigma uncertainty ellipse (major, minor, PA): (0.017", 0.009", 109°) * approx speed of asteroid's shadow [km/s]: 28.5299 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 530-050332 by 223 Rosa on 2023 Jun 4 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 34 0 0 - 3 0 7 8 37 17.6 0 74 60 - 3 24 59 - 2 35 20 - 3 36 46 - 2 23 38 .... 35 0 0 - 2 43 22 8 37 17.6 1 74 61 - 3 8 12 - 2 18 38 - 3 19 58 - 2 6 58 0.19 36 0 0 - 2 27 5 8 37 17.8 2 74 62 - 2 51 52 - 2 2 24 - 3 3 37 - 1 50 45 0.30 37 0 0 - 2 11 16 8 37 18.0 3 74 62 - 2 35 59 - 1 46 37 - 2 47 43 - 1 34 59 0.34 38 0 0 - 1 55 54 8 37 18.3 4 74 63 - 2 20 35 - 1 31 18 - 2 32 17 - 1 19 42 0.37 39 0 0 - 1 41 1 8 37 18.7 5 74 64 - 2 5 39 - 1 16 27 - 2 17 20 - 1 4 52 0.38 40 0 0 - 1 26 35 8 37 19.1 7 74 64 - 1 51 11 - 1 2 4 - 2 2 51 - 0 50 30 0.39 41 0 0 - 1 12 38 8 37 19.7 8 74 65 - 1 37 11 - 0 48 10 - 1 48 50 - 0 36 37 0.40 42 0 0 - 0 59 10 8 37 20.3 9 74 65 - 1 23 40 - 0 34 43 - 1 35 18 - 0 23 12 0.40 43 0 0 - 0 46 10 8 37 21.0 10 74 66 - 1 10 38 - 0 21 46 - 1 22 14 - 0 10 15 0.41 44 0 0 - 0 33 39 8 37 21.7 11 74 66 - 0 58 5 - 0 9 17 - 1 9 40 0 2 13 0.41 45 0 0 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-33 58 34 0.44 175 0 0 -35 3 19 8 43 54.1 18 305 -42 -35 30 8 -34 36 36 -35 42 51 -34 23 59 0.44 176 0 0 -35 28 22 8 43 55.3 17 305 -43 -35 55 8 -35 1 41 -36 7 51 -34 49 6 0.44 177 0 0 -35 53 5 8 43 56.4 16 304 -43 -36 19 49 -35 26 28 -36 32 30 -35 13 54 0.44 178 0 0 -36 17 29 8 43 57.5 15 303 -44 -36 44 10 -35 50 54 -36 56 50 -35 38 21 0.44 179 0 0 -36 41 33 8 43 58.5 14 303 -45 -37 8 11 -36 15 1 -37 20 49 -36 2 29 0.44 180 0 0 -37 5 16 8 43 59.4 14 302 -46 -37 31 51 -36 38 47 -37 44 28 -36 26 17 0.44 -179 0 0 -37 28 39 8 44 0.3 13 301 -47 -37 55 11 -37 2 12 -38 7 46 -36 49 44 0.44 -178 0 0 -37 51 40 8 44 1.0 12 301 -47 -38 18 9 -37 25 17 -38 30 43 -37 12 50 0.44 -177 0 0 -38 14 20 8 44 1.8 11 300 -48 -38 40 46 -37 48 0 -38 53 19 -37 35 34 0.44 -176 0 0 -38 36 39 8 44 2.4 10 300 -49 -39 3 2 -38 10 22 -39 15 33 -37 57 58 0.44 -175 0 0 -38 58 36 8 44 3.1 9 299 -49 -39 24 56 -38 32 22 -39 37 25 -38 20 0 0.44 -174 0 0 -39 20 11 8 44 3.6 8 298 -50 -39 46 28 -38 54 1 -39 58 55 -38 41 40 0.44 -173 0 0 -39 41 25 8 44 4.1 7 298 -51 -40 7 37 -39 15 17 -40 20 4 -39 2 58 0.44 -172 0 0 -40 2 16 8 44 4.5 7 297 -51 -40 28 25 -39 36 12 -40 40 50 -39 23 54 0.44 -171 0 0 -40 22 45 8 44 4.9 6 296 -52 -40 48 51 -39 56 44 -41 1 14 -39 44 28 0.44 -170 0 0 -40 42 51 8 44 5.3 5 296 -53 -41 8 54 -40 16 54 -41 21 15 -40 4 40 0.44 -169 0 0 -41 2 36 8 44 5.5 4 295 -53 -41 28 35 -40 36 42 -41 40 54 -40 24 29 0.45 -168 0 0 -41 21 57 8 44 5.8 3 294 -54 -41 47 53 -40 56 7 -42 0 11 -40 43 56 0.45 -167 0 0 -41 40 56 8 44 5.9 3 294 -55 -42 6 49 -41 15 10 -42 19 5 -41 3 0 0.45 -166 0 0 -41 59 33 8 44 6.1 2 293 -55 -42 25 22 -41 33 50 -42 37 36 -41 21 42 0.46 -165 0 0 -42 17 47 8 44 6.1 1 292 -56 -42 43 32 -41 52 7 -42 55 45 -41 40 1 0.48 -164 0 0 -42 35 38 8 44 6.2 0 292 -56 .. .. .. -42 10 2 .. .. .. -41 57 57 0.84 Uncertainty in time = +/- 1 secs Prediction of 2023 Apr 29.2 Data for the target star ------------------------ * name: UCAC4 530-050332 * constellation : Leo * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 09 37 29.7779 DE: +15 54 23.660 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 09 37 29.7778 DE: +15 54 23.660 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 12.1 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (223) Rosa asteroid class: approx. diameter [km]: 81 approx. diameter ["]: 0.037 distance from Earth [AU]: 3.03360 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#69 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): 0.017", 0.009", 109.114° remarks: * orbital elements for (223)Rosa : Mean anomaly = 38.3625216011 deg Arg. of pericenter = 65.4324401093 deg Long. of node = 47.5383346205 deg Inclination = 1.9237610388 deg Eccentricity = 0.1201637065 Semimajor axis = 3.0916695128 AU Perihelion dist = 2.7201630449 AU Mag: H = 9.90, G = 0.15 Epoch of elements : MJD 60099.36159722 TDT (2023 Jun 04.3616) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#692023Apr24,2.83,2023,6,4,8.678345,-0.142576,-0.378207,15.067993,-5.680121,0.004894,-0.001615,0.000000,0.000000 121.9814,15.8032,49.40,22.42,False UCAC4 530-050332,9.62493833,15.9065720,0.00,12.11,0.00,0.0,0,,9.64609998,15.8032094,3.47,0.00,0,0,0 223,Rosa,15.54,80.7,3.0336,0,0,3.027,-16.47,,4.6,0 0,38.2970,2023,6,4,65.4324,47.5383,1.9238,0.12016,3.09167,2.72016,9.89,5.0,0.15 1.237,0.0167,0.0087,109,0.0087,Known errors,-1.00,-1,-1,-1 20230604_050332,60063.19 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Apr 29, 04:34 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org