IOTA/IOTA-ES occultation update for (1070) Tunica / TYC 0368-00728-1 event on 2023 May 02, 15:36 UT Visible from New Zealand, Australia Summary ------- On 2023 May 02 UT, the 38.9 km diameter asteroid (1070) Tunica will occult a 11.1 mag star in the constellation Serpens 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 4.91 mag to 15.96 mag (the magnitude of the asteroid) for at most 3.090 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: 93 * date and approx. time of event: 2023 May 02, 15:29 - 2023 May 02, 15:44 * geocentric midpoint of event [JD]: 2460067.15051141 * magnitude of target star: 11.06 * magnitude drop [mag]: 4.91 * estimated maximum duration [s]: 3.090 * Moon: 90 % sunlit, 59° distance * Sun: 150° distance * rough path description: New Zealand, Australia Additional comments ------------------- RUWE high The occultation path -------------------- * approximate projected width [km]: 45 * 1 sigma uncertainty interval [path widths]: +/- 0.48 * 1 sigma uncertainty interval [seconds]: +/- 2.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.019, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.019", 0.006", 96°) * approx speed of asteroid's shadow [km/s]: 12.5873 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0368-00728-1 by 1070 Tunica on 2023 May 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 59 0 0 3 33 41 15 43 58.6 0 89 -24 3 45 58 3 21 22 3 57 39 3 9 36 .... 60 0 0 3 34 22 15 43 58.5 1 89 -25 3 46 39 3 22 3 3 58 20 3 10 18 0.38 61 0 0 3 34 21 15 43 58.1 2 89 -26 3 46 38 3 22 3 3 58 19 3 10 18 0.47 62 0 0 3 33 39 15 43 57.6 3 89 -26 3 45 56 3 21 21 3 57 37 3 9 36 0.51 63 0 0 3 32 16 15 43 56.9 4 89 -27 3 44 33 3 19 58 3 56 14 3 8 13 0.53 64 0 0 3 30 12 15 43 56.0 5 89 -28 3 42 29 3 17 53 3 54 9 3 6 8 0.54 65 0 0 3 27 26 15 43 55.0 6 89 -29 3 39 43 3 15 7 3 51 24 3 3 21 0.55 66 0 0 3 23 59 15 43 53.8 7 89 -30 3 36 16 3 11 39 3 47 58 2 59 54 0.56 67 0 0 3 19 51 15 43 52.4 8 89 -31 3 32 9 3 7 31 3 43 50 2 55 45 0.56 68 0 0 3 15 1 15 43 50.8 9 89 -32 3 27 20 3 2 41 3 39 2 2 50 55 0.57 69 0 0 3 9 31 15 43 49.0 10 89 -33 3 21 51 2 57 10 3 33 33 2 45 23 0.57 70 0 0 3 3 20 15 43 47.1 11 89 -34 3 15 40 2 50 59 3 27 24 2 39 11 0.57 71 0 0 2 56 28 15 43 45.0 12 89 -35 3 8 49 2 44 6 3 20 33 2 32 17 0.57 72 0 0 2 48 56 15 43 42.7 13 89 -36 3 1 17 2 36 32 3 13 2 2 24 43 0.58 73 0 0 2 40 42 15 43 40.3 14 89 -37 2 53 5 2 28 18 3 4 51 2 16 28 0.58 74 0 0 2 31 48 15 43 37.7 15 89 -38 2 44 12 2 19 23 2 55 59 2 7 31 0.58 75 0 0 2 22 13 15 43 34.9 16 89 -39 2 34 38 2 9 46 2 46 26 1 57 54 0.58 76 0 0 2 11 57 15 43 31.9 17 89 -40 2 24 23 1 59 29 2 36 13 1 47 36 0.58 77 0 0 2 1 1 15 43 28.7 18 89 -41 2 13 28 1 48 32 2 25 19 1 36 37 0.58 78 0 0 1 49 24 15 43 25.4 19 89 -42 2 1 53 1 36 53 2 13 45 1 24 57 0.58 79 0 0 1 37 6 15 43 21.9 20 89 -43 1 49 37 1 24 34 2 1 30 1 12 36 0.58 80 0 0 1 24 8 15 43 18.3 21 89 -44 1 36 40 1 11 34 1 48 35 0 59 35 0.58 81 0 0 1 10 30 15 43 14.4 22 89 -45 1 23 3 0 57 54 1 35 0 0 45 53 0.58 82 0 0 0 56 11 15 43 10.4 23 89 -46 1 8 46 0 43 33 1 20 44 0 31 30 0.58 83 0 0 0 41 11 15 43 6.2 24 89 -47 0 53 49 0 28 32 1 5 48 0 16 27 0.58 84 0 0 0 25 31 15 43 1.9 25 89 -48 0 38 10 0 12 50 0 50 12 0 0 43 0.58 85 0 0 0 9 11 15 42 57.3 26 89 -49 0 21 52 - 0 3 33 0 33 56 - 0 15 41 0.58 86 0 0 - 0 7 50 15 42 52.6 27 89 -50 0 4 54 - 0 20 35 0 16 59 - 0 32 46 0.58 87 0 0 - 0 25 31 15 42 47.8 28 88 -51 - 0 12 45 - 0 38 19 - 0 0 37 - 0 50 31 0.58 88 0 0 - 0 43 52 15 42 42.7 29 88 -52 - 0 31 4 - 0 56 42 - 0 18 54 - 1 8 57 0.58 89 0 0 - 1 2 53 15 42 37.5 30 88 -53 - 0 50 3 - 1 15 46 - 0 37 50 - 1 28 3 0.58 90 0 0 - 1 22 35 15 42 32.1 31 88 -54 - 1 9 42 - 1 35 30 - 0 57 27 - 1 47 49 0.58 91 0 0 - 1 42 56 15 42 26.6 32 87 -55 - 1 30 0 - 1 55 54 - 1 17 43 - 2 8 16 0.58 92 0 0 - 2 3 57 15 42 20.9 33 87 -56 - 1 50 59 - 2 16 57 - 1 38 39 - 2 29 22 0.58 93 0 0 - 2 25 38 15 42 15.0 34 87 -57 - 2 12 37 - 2 38 41 - 2 0 15 - 2 51 8 0.58 94 0 0 - 2 47 59 15 42 9.0 35 87 -58 - 2 34 55 - 3 1 4 - 2 22 30 - 3 13 34 0.58 95 0 0 - 3 10 59 15 42 2.8 36 86 -59 - 2 57 52 - 3 24 7 - 2 45 24 - 3 36 40 0.58 96 0 0 - 3 34 38 15 41 56.4 37 86 -60 - 3 21 28 - 3 47 50 - 3 8 58 - 4 0 25 0.58 97 0 0 - 3 58 57 15 41 49.8 38 85 -61 - 3 45 44 - 4 12 11 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30.3 55 9 -64 -33 40 4 -34 12 13 -33 24 51 -34 27 37 0.61 147 0 0 -34 37 54 15 34 21.5 54 7 -63 -34 21 50 -34 54 2 -34 6 35 -35 9 27 0.61 148 0 0 -35 19 28 15 34 12.8 53 5 -62 -35 3 23 -35 35 38 -34 48 6 -35 51 4 0.61 149 0 0 -36 0 50 15 34 4.2 53 4 -61 -35 44 43 -36 17 0 -35 29 25 -36 32 28 0.61 150 0 0 -36 41 56 15 33 55.7 52 2 -60 -36 25 48 -36 58 7 -36 10 29 -37 13 36 0.61 151 0 0 -37 22 45 15 33 47.4 51 0 -59 -37 6 37 -37 38 58 -36 51 17 -37 54 28 0.61 152 0 0 -38 3 17 15 33 39.2 51 359 -58 -37 47 7 -38 19 30 -37 31 47 -38 35 1 0.61 153 0 0 -38 43 29 15 33 31.1 50 357 -57 -38 27 19 -38 59 43 -38 11 58 -39 15 13 0.61 154 0 0 -39 23 20 15 33 23.3 49 356 -56 -39 7 10 -39 39 34 -38 51 49 -39 55 5 0.61 155 0 0 -40 2 49 15 33 15.5 49 354 -55 -39 46 39 -40 19 3 -39 31 18 -40 34 34 0.61 156 0 0 -40 41 55 15 33 7.9 48 353 -54 -40 25 45 -40 58 9 -40 10 24 -41 13 40 0.61 157 0 0 -41 20 36 15 33 0.5 47 352 -53 -41 4 26 -41 36 49 -40 49 6 -41 52 20 0.61 158 0 0 -41 58 51 15 32 53.3 46 350 -52 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9 6 15 29 32.3 4 282 -9 -64 56 42 -65 21 31 -64 44 56 -65 33 23 0.62 -129 0 0 -65 13 4 15 29 32.1 4 281 -8 -65 0 42 -65 25 28 -64 48 56 -65 37 18 0.63 -128 0 0 -65 16 44 15 29 31.8 3 280 -8 -65 4 23 -65 29 7 -64 52 39 -65 40 56 0.63 -127 0 0 -65 20 6 15 29 31.6 3 279 -7 -65 7 46 -65 32 28 -64 56 3 -65 44 15 0.64 -126 0 0 -65 23 10 15 29 31.4 2 278 -7 -65 10 52 -65 35 31 -64 59 9 -65 47 17 0.64 -125 0 0 -65 25 57 15 29 31.2 2 277 -7 -65 13 39 -65 38 16 -65 1 58 -65 50 2 0.65 -124 0 0 -65 28 26 15 29 31.1 1 276 -6 -65 16 9 -65 40 44 -65 4 29 -65 52 29 0.67 -123 0 0 -65 30 37 15 29 31.0 1 275 -6 -65 18 21 -65 42 55 -65 6 42 -65 54 39 0.70 -122 0 0 -65 32 31 15 29 30.9 1 274 -6 -65 20 16 -65 44 48 -65 8 37 -65 56 32 0.76 -121 0 0 -65 34 8 15 29 30.9 0 274 -5 -65 21 53 -65 46 24 -65 10 15 -65 58 7 1.04 Uncertainty in time = +/- 3 secs Prediction of 2023 Apr 29.2 Data for the target star ------------------------ * name: TYC 0368-00728-1 * constellation : Serpens * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 16 18 42.1814 DE: +01 17 53.283 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 16 18 42.1817 DE: +01 17 53.286 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.500,0.300) * V mag [mag]: 11.1 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1070) Tunica asteroid class: approx. diameter [km]: 39 approx. diameter ["]: 0.022 distance from Earth [AU]: 2.43400 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#56 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): 0.019", 0.006", 95.922° remarks: * orbital elements for (1070)Tunica : Mean anomaly = 248.7203499672 deg Arg. of pericenter = 191.0816081309 deg Long. of node = 165.2765111080 deg Inclination = 16.9627231124 deg Eccentricity = 0.0801621268 Semimajor axis = 3.2325887599 AU Perihelion dist = 2.9734575697 AU Mag: H = 10.79, G = 0.15 Epoch of elements : MJD 60066.65048611 TDT (2023 May 02.6505) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#562023Apr24,3.09,2023,5,2,15.612274,-0.291026,-0.423430,-5.858512,4.019109,-0.002360,-0.001644,0.000001,0.000000 150.4972,1.2397,-54.93,15.43,False TYC 0368-00728-1,16.31171706,1.2981341,0.00,11.06,0.00,0.0,0,,16.33163007,1.2396842,4.91,0.00,0,0,0 1070,Tunica,15.96,38.9,2.4340,0,0,-1.412,14.52,,2.0,0 0,248.6100,2023,5,2,191.0816,165.2765,16.9627,0.08016,3.23259,2.97346,10.81,5.0,0.15 1.476,0.0193,0.0057,96,0.0105,Known errors,-1.00,-1,-1,-1 20230502_0728-1,60063.18 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Apr 29, 04:17 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org