IOTA/IOTA-ES occultation update for (40) Harmonia / UCAC4 527-051448 event on 2023 Mar 07, 03:41 UT Visible from Europe Summary ------- On 2023 Mar 07 UT, the 113.6 km diameter asteroid (40) Harmonia will occult a 11.7 mag star in the constellation Leo for observers along a path across Europe. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.25 mag to 10.25 mag (the magnitude of the asteroid) for at most 10.560 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 07, 03:36 - 2023 Mar 07, 03:46 * geocentric midpoint of event [JD]: 2460010.65376350 * magnitude of target star: 11.73 * magnitude drop [mag]: 0.25 * estimated maximum duration [s]: 10.560 * Moon: 100 % sunlit, 5° distance * Sun: 169° distance * rough path description: Europe Additional comments ------------------- low mag drop, moon The occultation path -------------------- * approximate projected width [km]: 226 * 1 sigma uncertainty interval [path widths]: +/- 0.02 * 1 sigma uncertainty interval [seconds]: +/- 1.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.014, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.015", 0.002", 112°) * approx speed of asteroid's shadow [km/s]: 10.7604 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 527-051448 by 40 Harmonia on 2023 Mar 7 Centre Star Star Sun Path Limit1 Path Limit2 Error Limit1 Error Limit2 Alt E. Longitude Latitude U.T. Alt Az Alt Crn o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " o ' " o ' " o ' " o ' " Longitude Latitude Longitude Latitude Longitude Latitude Longitude Latitude .. .. .. .. .. .. .. .. .... .. .. .. ... .. .. .. .. .. 40 55 32 35 4 57 ... .. .. .. .. .. 40 21 29 35 12 44 .... .. .. .. .. .. .. .. .. .... .. .. .. ... .. .. .. .. .. 37 44 19 36 7 30 ... .. .. .. .. .. 37 27 59 36 10 23 .... .. .. .. .. .. .. .. .. .... .. .. .. ... .. .. .. .. .. 35 48 20 36 49 13 ... .. .. .. .. .. 35 35 49 36 51 1 .... 39 57 5 36 27 46 3 36 30.2 3 286 -2 ... .. .. .. .. .. 34 16 37 37 24 11 ... .. .. .. .. .. 34 5 59 37 25 28 .... 37 25 56 37 19 26 3 36 33.5 5 285 -4 ... .. .. .. .. .. 32 58 15 37 55 26 ... .. .. .. .. .. 32 48 48 37 56 22 -1.40 35 40 25 37 58 26 3 36 36.9 7 284 -6 ... .. .. .. .. .. 31 48 40 38 24 14 ... .. .. .. .. .. 31 40 1 38 24 56 -1.55 34 14 17 38 32 2 3 36 40.3 8 283 -7 39 41 45 37 39 45 30 45 24 38 51 16 40 5 18 37 34 54 30 37 21 38 51 48 -1.60 32 59 36 39 2 27 3 36 43.6 9 282 -8 37 26 5 38 27 20 29 46 56 39 16 58 37 41 34 38 24 45 29 39 22 39 17 21 -1.63 31 52 40 39 30 41 3 36 47.0 10 281 -9 35 46 24 39 4 55 28 52 19 39 41 35 35 58 56 39 3 9 28 45 7 39 41 51 -1.65 30 51 29 39 57 20 3 36 50.3 11 281 -9 34 23 40 39 37 46 28 0 50 40 5 19 34 34 34 39 36 29 27 53 57 40 5 30 -1.66 29 54 44 40 22 44 3 36 53.7 12 280 -10 33 11 20 40 7 44 27 11 59 40 28 19 33 21 9 40 6 45 27 5 21 40 28 25 -1.67 29 1 33 40 47 8 3 36 57.1 12 279 -11 32 6 12 40 35 40 26 25 22 40 50 42 32 15 16 40 34 54 26 18 58 40 50 43 -1.67 28 11 19 41 10 43 3 37 0.4 13 279 -11 31 6 29 41 2 7 25 40 42 41 12 31 31 14 58 41 1 31 25 34 30 41 12 29 -1.68 27 23 33 41 33 36 3 37 3.8 14 278 -12 30 10 58 41 27 22 24 57 45 41 33 52 30 18 59 41 26 55 24 51 43 41 33 47 -1.68 26 37 56 41 55 53 3 37 7.1 14 278 -12 29 18 51 41 51 41 24 16 17 41 54 48 29 26 30 41 51 20 24 10 25 41 54 40 -1.68 25 54 10 42 17 39 3 37 10.5 15 277 -13 28 29 33 42 15 12 23 36 11 42 15 22 28 36 54 42 14 57 23 30 26 42 15 10 -1.69 25 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-144 9 46 86 19 36 161 59 25 85 7 19 -143 1 11 86 18 35 -1.79 -178 48 28 85 42 23 3 45 47.7 13 60 -3 159 54 58 84 25 54 -152 41 59 86 2 27 159 9 15 84 21 15 -151 34 34 86 2 7 -1.79 176 0 30 85 5 58 3 45 51.1 12 55 -2 157 19 58 83 36 37 -160 18 48 85 40 30 156 39 19 83 31 22 -159 14 40 85 40 49 -1.80 171 37 19 84 25 57 3 45 54.4 12 50 -1 154 58 38 82 42 44 -167 0 27 85 14 9 154 21 47 82 36 46 -166 0 42 85 15 5 -1.81 167 49 7 83 42 11 3 45 57.8 11 47 -1 152 44 24 81 42 49 -172 52 12 84 43 44 152 10 14 81 35 53 -171 57 8 84 45 16 -1.82 164 25 59 82 54 10 3 46 1.2 10 43 0 150 30 42 80 34 18 -178 1 25 84 9 25 149 58 6 80 25 57 -177 10 52 84 11 32 -1.83 161 19 52 82 1 2 3 46 4.5 9 40 1 148 8 30 79 11 51 177 24 12 83 31 11 147 35 44 79 0 59 178 10 40 83 33 53 -1.85 158 23 34 81 1 15 3 46 7.9 8 37 2 145 16 4 77 19 37 173 17 22 82 48 46 144 37 29 77 1 53 174 0 16 82 52 5 -1.87 155 29 15 79 51 57 3 46 11.2 7 34 3 ... .. .. .. .. .. 169 31 22 82 1 37 ... .. .. .. .. .. 170 11 17 82 5 38 -1.92 152 24 58 78 26 49 3 46 14.6 5 31 5 ... .. .. .. .. .. 165 59 49 81 8 45 ... .. .. .. .. .. 166 37 26 81 13 36 -2.02 148 37 11 76 24 17 3 46 18.0 3 28 7 ... .. .. .. .. .. 162 35 59 80 8 20 ... .. .. .. .. .. 163 12 4 80 14 17 -2.43 .. .. .. .. .. .. .. .. .... .. .. .. ... .. .. .. .. .. 159 11 6 78 56 52 ... .. .. .. .. .. 159 46 49 79 4 28 .... .. .. .. .. .. .. .. .. .... .. .. .. ... .. .. .. .. .. 155 28 46 77 25 45 ... .. .. .. .. .. 156 6 50 77 36 32 .... .. .. .. .. .. .. .. .. .... .. .. .. ... .. .. .. .. .. 150 19 22 74 53 50 ... .. .. .. .. .. 151 18 38 75 19 16 .... Uncertainty in time = +/- 1 secs Prediction of 2023 Feb 15.9 Data for the target star ------------------------ * name: UCAC4 527-051448 * constellation : Leo * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 10 43 58.2082 DE: +15 14 45.340 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 10 43 58.2082 DE: +15 14 45.340 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 11.7 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (40) Harmonia asteroid class: ShapeModel approx. diameter [km]: 114 approx. diameter ["]: 0.113 distance from Earth [AU]: 1.38300 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#134 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): 0.015", 0.002", 111.754° remarks: * orbital elements for (40)Harmonia : Mean anomaly = 155.4330769590 deg Arg. of pericenter = 268.9590325681 deg Long. of node = 94.1633288919 deg Inclination = 4.2555171399 deg Eccentricity = 0.0462738402 Semimajor axis = 2.2674246887 AU Perihelion dist = 2.1625022410 AU Mag: H = 7.28, G = 0.15 Epoch of elements : MJD 60010.15361111 TDT (2023 Mar 07.1536) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1342023Feb07,10.56,2023,3,7,3.690324,0.341305,0.794030,-5.579998,2.398069,0.000597,-0.000946,0.000001,0.000000 -58.6581,15.1234,127.43,-5.40,False UCAC4 527-051448,10.73283562,15.2459277,0.00,11.73,0.00,0.0,0,,10.75362766,15.1234332,0.25,0.00,0,0,0 40,Harmonia,10.25,113.6,1.3830,0,0,-2.450,15.24,,5.8,0 0,155.3887,2023,3,7,268.9590,94.1633,4.2555,0.04627,2.26742,2.16250,7.27,5.0,0.15 1.022,0.0153,0.0025,112,0.0025,Known errors,-1.00,-1,-1,-1 20230307_051448,59990.86 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Feb 15, 20:45 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org