IOTA/IOTA-ES occultation update for (26) Proserpina / UCAC4 357-073392 event on 2022 Feb 11, 16:39 UT Visible from New Zealand, Australia Summary ------- On 2022 Feb 11 UT, the 90.9 km diameter asteroid (26) Proserpina will occult a 11.5 mag star in the constellation Libra 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 1.26 mag to 12.36 mag (the magnitude of the asteroid) for at most 4.300 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: 2022 Feb 11, 16:35 - 2022 Feb 11, 16:43 * geocentric midpoint of event [JD]: 2459622.19429583 * magnitude of target star: 11.51 * magnitude drop [mag]: 1.26 * estimated maximum duration [s]: 4.300 * Moon: 78 % sunlit, 150° distance * Sun: 85° distance * rough path description: New Zealand, Australia The occultation path -------------------- * approximate projected width [km]: 112 * 1 sigma uncertainty interval [path widths]: +/- 0.02 * 1 sigma uncertainty interval [seconds]: +/- 2.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.028, +/- 0.009) * 1 sigma uncertainty ellipse (major, minor, PA): (0.029", 0.001", 107°) * approx speed of asteroid's shadow [km/s]: 21.1486 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 357-073392 by 26 Proserpina on 2022 Feb 11 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 108 0 0 -19 31 57 16 35 43.7 0 110 -56 -20 4 40 .. .. .. -20 6 11 .. .. .. .... 109 0 0 -19 52 56 16 35 43.8 1 110 -56 -20 25 44 -19 20 22 -20 27 16 -19 18 52 0.53 110 0 0 -20 14 20 16 35 44.0 2 109 -56 -20 47 13 -19 41 41 -20 48 45 -19 40 10 0.63 111 0 0 -20 36 7 16 35 44.3 3 109 -55 -21 9 6 -20 3 23 -21 10 39 -20 1 52 0.67 112 0 0 -20 58 18 16 35 44.7 4 109 -55 -21 31 23 -20 25 29 -21 32 55 -20 23 58 0.68 113 0 0 -21 20 53 16 35 45.2 5 108 -55 -21 54 2 -20 47 58 -21 55 35 -20 46 26 0.69 114 0 0 -21 43 49 16 35 45.9 6 108 -54 -22 17 5 -21 10 49 -22 18 38 -21 9 17 0.70 115 0 0 -22 7 8 16 35 46.6 7 107 -54 -22 40 29 -21 34 2 -22 42 2 -21 32 30 0.71 116 0 0 -22 30 48 16 35 47.5 8 107 -54 -23 4 14 -21 57 37 -23 5 48 -21 56 5 0.71 117 0 0 -22 54 49 16 35 48.5 9 107 -53 -23 28 20 -22 21 32 -23 29 54 -22 20 0 0.71 118 0 0 -23 19 10 16 35 49.6 10 106 -53 -23 52 47 -22 45 48 -23 54 21 -22 44 15 0.72 119 0 0 -23 43 51 16 35 50.8 11 106 -52 -24 17 33 -23 10 23 -24 19 8 -23 8 51 0.72 120 0 0 -24 8 50 16 35 52.2 12 105 -52 -24 42 39 -23 35 18 -24 44 13 -23 33 45 0.72 121 0 0 -24 34 9 16 35 53.6 13 105 -51 -25 8 3 -24 0 31 -25 9 37 -23 58 58 0.72 122 0 0 -24 59 45 16 35 55.1 14 104 -51 -25 33 44 -24 26 2 -25 35 19 -24 24 28 0.72 123 0 0 -25 25 38 16 35 56.8 15 104 -50 -25 59 43 -24 51 50 -26 1 18 -24 50 16 0.72 124 0 0 -25 51 48 16 35 58.6 16 104 -49 -26 25 58 -25 17 54 -26 27 33 -25 16 20 0.73 125 0 0 -26 18 13 16 36 0.4 17 103 -49 -26 52 28 -25 44 14 -26 54 4 -25 42 40 0.73 126 0 0 -26 44 53 16 36 2.4 18 103 -48 -27 19 13 -26 10 49 -27 20 49 -26 9 15 0.73 127 0 0 -27 11 47 16 36 4.5 19 102 -47 -27 46 13 -26 37 38 -27 47 49 -26 36 4 0.73 128 0 0 -27 38 55 16 36 6.7 20 101 -47 -28 13 25 -27 4 41 -28 15 2 -27 3 6 0.73 129 0 0 -28 6 15 16 36 9.0 21 101 -46 -28 40 50 -27 31 56 -28 42 27 -27 30 21 0.73 130 0 0 -28 33 47 16 36 11.4 22 100 -45 -29 8 27 -27 59 23 -29 10 4 -27 57 48 0.73 131 0 0 -29 1 29 16 36 13.8 23 100 -44 -29 36 14 -28 27 1 -29 37 51 -28 25 26 0.73 132 0 0 -29 29 22 16 36 16.4 24 99 -44 -30 4 12 -28 54 50 -30 5 49 -28 53 14 0.73 133 0 0 -29 57 24 16 36 19.1 25 98 -43 -30 32 18 -29 22 47 -30 33 55 -29 21 11 0.73 134 0 0 -30 25 34 16 36 21.8 26 98 -42 -31 0 32 -29 50 53 -31 2 10 -29 49 17 0.73 135 0 0 -30 53 52 16 36 24.7 27 97 -41 -31 28 54 -30 19 7 -31 30 32 -30 17 30 0.73 136 0 0 -31 22 16 16 36 27.6 27 96 -40 -31 57 22 -30 47 27 -31 59 0 -30 45 50 0.73 137 0 0 -31 50 45 16 36 30.6 28 96 -40 -32 25 56 -31 15 53 -32 27 34 -31 14 16 0.73 138 0 0 -32 19 19 16 36 33.7 29 95 -39 -32 54 33 -31 44 23 -32 56 12 -31 42 46 0.73 139 0 0 -32 47 58 16 36 36.9 30 94 -38 -33 23 15 -32 12 58 -33 24 54 -32 11 21 0.73 140 0 0 -33 16 38 16 36 40.1 31 93 -37 -33 51 59 -32 41 36 -33 53 38 -32 39 58 0.73 141 0 0 -33 45 21 16 36 43.4 32 92 -36 -34 20 45 -33 10 15 -34 22 24 -33 8 38 0.73 142 0 0 -34 14 5 16 36 46.8 33 92 -35 -34 49 32 -33 38 56 -34 51 11 -33 37 19 0.73 143 0 0 -34 42 49 16 36 50.3 34 91 -34 -35 18 18 -34 7 38 -35 19 58 -34 6 0 0.73 144 0 0 -35 11 32 16 36 53.8 34 90 -34 -35 47 4 -34 36 18 -35 48 43 -34 34 40 0.73 145 0 0 -35 40 13 16 36 57.3 35 89 -33 -36 15 47 -35 4 57 -36 17 27 -35 3 19 0.73 146 0 0 -36 8 51 16 37 1.0 36 88 -32 -36 44 28 -35 33 33 -36 46 7 -35 31 56 0.73 147 0 0 -36 37 26 16 37 4.6 37 87 -31 -37 13 4 -36 2 7 -37 14 44 -36 0 29 0.73 148 0 0 -37 5 56 16 37 8.4 38 86 -30 -37 41 36 -36 30 35 -37 43 16 -36 28 57 0.73 149 0 0 -37 34 21 16 37 12.1 38 85 -29 -38 10 2 -36 58 59 -38 11 42 -36 57 21 0.73 150 0 0 -38 2 40 16 37 15.9 39 84 -28 -38 38 22 -37 27 17 -38 40 2 -37 25 38 0.73 151 0 0 -38 30 52 16 37 19.8 40 83 -27 -39 6 34 -37 55 27 -39 8 14 -37 53 49 0.73 152 0 0 -38 58 55 16 37 23.7 41 82 -27 -39 34 38 -38 23 30 -39 36 18 -38 21 52 0.73 153 0 0 -39 26 50 16 37 27.6 41 81 -26 -40 2 34 -38 51 25 -40 4 14 -38 49 46 0.73 154 0 0 -39 54 35 16 37 31.5 42 79 -25 -40 30 19 -39 19 10 -40 31 59 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33 19 0.77 - 60 0 0 -52 51 26 16 43 44.5 11 253 51 -53 25 14 -52 17 53 -53 26 49 -52 16 20 0.77 - 59 0 0 -52 34 12 16 43 45.3 10 252 51 -53 8 5 -52 0 34 -53 9 40 -51 59 1 0.78 - 58 0 0 -52 16 37 16 43 46.0 9 251 51 -52 50 36 -51 42 54 -52 52 11 -51 41 20 0.78 - 57 0 0 -51 58 41 16 43 46.7 9 250 51 -52 32 45 -51 24 53 -52 34 20 -51 23 19 0.78 - 56 0 0 -51 40 24 16 43 47.4 8 250 51 -52 14 33 -51 6 31 -52 16 9 -51 4 57 0.79 - 55 0 0 -51 21 46 16 43 48.0 7 249 51 -51 56 0 -50 47 48 -51 57 36 -50 46 14 0.79 - 54 0 0 -51 2 47 16 43 48.6 7 248 51 -51 37 7 -50 28 44 -51 38 43 -50 27 10 0.80 - 53 0 0 -50 43 28 16 43 49.1 6 247 51 -51 17 52 -50 9 20 -51 19 28 -50 7 45 0.81 - 52 0 0 -50 23 48 16 43 49.5 5 247 51 -50 58 17 -49 49 35 -50 59 53 -49 48 0 0.82 - 51 0 0 -50 3 47 16 43 49.9 4 246 51 -50 38 21 -49 29 30 -50 39 58 -49 27 55 0.84 - 50 0 0 -49 43 26 16 43 50.3 4 245 51 -50 18 4 -49 9 5 -50 19 41 -49 7 29 0.86 - 49 0 0 -49 22 45 16 43 50.5 3 244 51 -49 57 27 -48 48 19 -49 59 5 -48 46 43 0.89 - 48 0 0 -49 1 43 16 43 50.8 2 243 51 -49 36 30 -48 27 13 -49 38 8 -48 25 37 0.95 - 47 0 0 -48 40 22 16 43 50.9 1 243 51 -49 15 13 -48 5 48 -49 16 51 -48 4 12 1.06 - 46 0 0 -48 18 40 16 43 51.0 1 242 51 -48 53 36 -47 44 2 -48 55 14 -47 42 26 1.43 Uncertainty in time = +/- 2 secs Prediction of 2021 Dec 15.0 Data for the target star ------------------------ * name: UCAC4 357-073392 * constellation : Libra * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 15 40 38.9641 DE: -18 45 45.230 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 15 40 38.9642 DE: -18 45 45.230 * position source: Gaia EDR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 11.5 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (26) Proserpina asteroid class: approx. diameter [km]: 91 approx. diameter ["]: 0.054 distance from Earth [AU]: 2.31050 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#132 date of fit: 2021 Aug 25 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): 0.029", 0.001", 107.026° remarks: * orbital elements for (26)Proserpina : Mean anomaly = 338.2350397373 deg Arg. of pericenter = 193.6645864057 deg Long. of node = 45.7619414435 deg Inclination = 3.5626513565 deg Eccentricity = 0.0893596550 Semimajor axis = 2.6549946250 AU Perihelion dist = 2.4177452212 AU Mag: H = 7.49, G = 0.15 Epoch of elements : MJD 59621.69437500 TDT (2022 Feb 11.6944) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1322021Aug25,4.30,2022,2,11,16.6631,-0.158706,-0.565558,11.505172,-3.181209,-0.005592,0.001299,0.000000,0.000000 -156.1928,-18.8329,-66.39,-13.87,False UCAC4 357-073392,15.67749002,-18.7625638,0.00,11.51,0.00,0.0,0,,15.69837409,-18.8329181,1.26,0.00,0,0,0 26,Proserpina,12.36,90.9,2.3105,0,0,3.085,-12.11,,4.6 0,338.0768,2022,2,11,193.6646,45.7619,3.5627,0.08936,2.65499,2.41775,7.49,5.0,0.15 1.023,0.0290,0.0010,107,0.0013,Known errors,-1.00,-1,-1,-1 20220211_073392,59563.00 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2021 Dec 15, 04:13 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org