IOTA/IOTA-ES occultation update for (289) Nenetta / TYC 0745-00310-1 event on 2021 Feb 15, 02:02 UT Visible from South America, USA, SW Canada Summary ------- On 2021 Feb 15 UT, the 34.9 km diameter asteroid (289) Nenetta will occult a 11.5 mag star in the constellation Gemini for observers along a path across South America, USA, SW Canada. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.83 mag to 14.24 mag (the magnitude of the asteroid) for at most 7.4 seconds. This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Hugh Harris, astrometry for the asteroid kindly provided by Bill Owen, 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: 68 * date and approx. time of event: 2021 Feb 15, 01:40 - 2021 Feb 15, 02:25 * geocentric midpoint of event [JD]: 2459260.58529167 * magnitude of target star: 11.49 * magnitude drop [mag]: 2.83 * estimated maximum duration [s]: 7.4 * Moon: 11 % sunlit, 94° distance * Sun: 132° distance * rough path description: South America, USA, SW Canada The occultation path -------------------- * approximate projected width [km]: 35 * 1 sigma uncertainty interval [path widths]: +/- 0.87 * 1 sigma uncertainty interval [seconds]: +/- 6.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.025, +/- 0.011) * 1 sigma uncertainty ellipse (major, minor, PA): (0.025", 0.011", 93°) * approx speed of asteroid's shadow [km/s]: 4.7469 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0745-00310-1 by 289 Nenetta on 2021 Feb 15 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 ' " Longitude Longitude Longitude Longitude 4 8 23 -45 0 0 1 40 30.5 0 291 -28 ... .. .. 3 31 49 ... .. .. 2 29 48 .... 0 44 9 -44 0 0 1 40 32.0 3 293 -30 1 17 7 0 11 43 2 15 48 - 0 43 39 -0.06 Latitude Latitude Latitude Latitude - 1 0 0 -43 26 7 1 40 33.9 4 295 -31 -43 15 44 -43 36 30 -42 57 39 -43 54 34 -0.05 - 2 0 0 -43 5 34 1 40 35.3 5 295 -32 -42 55 7 -43 16 0 -42 36 56 -43 34 11 -0.05 - 3 0 0 -42 44 14 1 40 37.1 6 296 -32 -42 33 44 -42 54 44 -42 15 26 -43 13 1 -0.05 - 4 0 0 -42 22 7 1 40 39.1 7 297 -33 -42 11 33 -42 32 41 -41 53 9 -42 51 5 -0.04 - 5 0 0 -41 59 12 1 40 41.5 7 297 -33 -41 48 34 -42 9 50 -41 30 3 -42 28 21 -0.04 - 6 0 0 -41 35 28 1 40 44.1 8 298 -34 -41 24 46 -41 46 10 -41 6 9 -42 4 48 -0.04 - 7 0 0 -41 10 55 1 40 47.1 9 299 -35 -41 0 9 -41 21 41 -40 41 24 -41 40 25 -0.04 - 8 0 0 -40 45 31 1 40 50.4 10 299 -35 -40 34 41 -40 56 21 -40 15 49 -41 15 13 -0.04 - 9 0 0 -40 19 16 1 40 54.0 11 300 -36 -40 8 22 -40 30 10 -39 49 22 -40 49 10 -0.03 - 10 0 0 -39 52 9 1 40 58.0 12 301 -36 -39 41 10 -40 3 8 -39 22 3 -40 22 14 -0.03 - 11 0 0 -39 24 9 1 41 2.4 13 301 -37 -39 13 6 -39 35 12 -38 53 51 -39 54 27 -0.03 - 12 0 0 -38 55 15 1 41 7.1 13 302 -38 -38 44 7 -39 6 23 -38 24 45 -39 25 45 -0.03 - 13 0 0 -38 25 27 1 41 12.2 14 302 -38 -38 14 15 -38 36 39 -37 54 44 -38 56 10 -0.03 - 14 0 0 -37 54 43 1 41 17.8 15 303 -39 -37 43 26 -38 6 0 -37 23 47 -38 25 39 -0.03 - 15 0 0 -37 23 4 1 41 23.7 16 304 -40 -37 11 42 -37 34 26 -36 51 55 -37 54 12 -0.03 - 16 0 0 -36 50 27 1 41 30.1 17 304 -40 -36 39 1 -37 1 54 -36 19 5 -37 21 49 -0.03 - 17 0 0 -36 16 53 1 41 36.9 18 305 -41 -36 5 22 -36 28 25 -35 45 18 -36 48 29 -0.03 - 18 0 0 -35 42 21 1 41 44.2 19 305 -42 -35 30 45 -35 53 57 -35 10 32 -36 14 10 -0.02 - 19 0 0 -35 6 50 1 41 51.9 20 306 -42 -34 55 9 -35 18 31 -34 34 47 -35 38 52 -0.02 - 20 0 0 -34 30 19 1 42 0.1 21 306 -43 -34 18 33 -34 42 5 -33 58 3 -35 2 35 -0.02 - 21 0 0 -33 52 48 1 42 8.8 22 307 -44 -33 40 57 -34 4 39 -33 20 18 -34 25 18 -0.02 - 22 0 0 -33 14 16 1 42 18.1 23 307 -44 -33 2 20 -33 26 13 -32 41 32 -33 47 0 -0.02 - 23 0 0 -32 34 43 1 42 27.9 24 308 -45 -32 22 42 -32 46 45 -32 1 45 -33 7 41 -0.02 - 24 0 0 -31 54 8 1 42 38.2 25 308 -46 -31 42 2 -32 6 15 -31 20 57 -32 27 20 -0.02 - 25 0 0 -31 12 32 1 42 49.0 26 309 -46 -31 0 20 -31 24 43 -30 39 6 -31 45 57 -0.02 - 26 0 0 -30 29 53 1 43 0.5 27 309 -47 -30 17 36 -30 42 10 -29 56 13 -31 3 32 -0.02 - 27 0 0 -29 46 11 1 43 12.5 28 310 -47 -29 33 49 -29 58 33 -29 12 18 -30 20 5 -0.02 - 28 0 0 -29 1 27 1 43 25.1 30 310 -48 -28 49 0 -29 13 54 -28 27 20 -29 35 35 -0.02 - 29 0 0 -28 15 41 1 43 38.4 31 311 -49 -28 3 9 -28 28 13 -27 41 19 -28 50 2 -0.02 - 30 0 0 -27 28 51 1 43 52.2 32 311 -49 -27 16 14 -27 41 28 -26 54 17 -28 3 26 -0.02 - 31 0 0 -26 41 0 1 44 6.7 33 311 -50 -26 28 18 -26 53 42 -26 6 12 -27 15 48 -0.02 - 32 0 0 -25 52 6 1 44 21.9 34 312 -51 -25 39 20 -26 4 53 -25 17 5 -26 27 8 -0.02 - 33 0 0 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39 49 -0.03 - 57 0 0 - 0 54 37 1 54 12.1 67 313 -55 - 0 40 30 - 1 8 43 - 0 15 56 - 1 33 17 -0.03 - 58 0 0 0 12 7 1 54 42.7 68 313 -55 0 26 15 - 0 2 0 0 50 51 - 0 26 35 -0.03 - 59 0 0 1 18 57 1 55 13.6 70 312 -55 1 33 5 1 4 49 1 57 42 0 40 13 -0.04 - 60 0 0 2 25 49 1 55 44.7 71 312 -54 2 39 58 2 11 41 3 4 36 1 47 4 -0.04 - 61 0 0 3 32 41 1 56 16.2 73 311 -54 3 46 50 3 18 32 4 11 29 2 53 55 -0.04 - 62 0 0 4 39 29 1 56 47.8 74 310 -53 4 53 38 4 25 20 5 18 17 4 0 43 -0.04 - 63 0 0 5 46 9 1 57 19.5 75 309 -53 6 0 18 5 32 1 6 24 57 5 7 24 -0.04 - 64 0 0 6 52 40 1 57 51.4 77 307 -52 7 6 49 6 38 32 7 31 27 6 13 55 -0.04 - 65 0 0 7 58 57 1 58 23.4 78 305 -51 8 13 5 7 44 49 8 37 42 7 20 14 -0.05 - 66 0 0 9 4 58 1 58 55.4 79 303 -51 9 19 5 8 50 51 9 43 41 8 26 17 -0.05 - 67 0 0 10 10 39 1 59 27.4 81 300 -50 10 24 45 9 56 33 10 49 20 9 32 1 -0.05 - 68 0 0 11 15 58 1 59 59.3 82 296 -49 11 30 3 11 1 53 11 54 36 10 37 22 -0.05 - 69 0 0 12 20 51 2 0 31.2 83 291 -49 12 34 55 12 6 47 12 59 25 11 42 19 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42 26 4 17 24 50 12 -0.07 - 83 0 0 26 22 7 2 7 32.8 77 154 -37 26 35 35 26 8 41 26 59 2 25 45 17 -0.07 - 84 0 0 27 16 7 2 8 0.1 76 153 -36 27 29 31 27 2 44 27 52 51 26 39 26 -0.08 - 85 0 0 28 9 10 2 8 26.9 75 151 -35 28 22 30 27 55 51 28 45 44 27 32 40 -0.08 - 86 0 0 29 1 16 2 8 53.3 74 150 -35 29 14 32 28 48 1 29 37 39 28 24 57 -0.08 - 87 0 0 29 52 24 2 9 19.2 73 149 -34 30 5 36 29 39 13 30 28 35 29 16 16 -0.08 - 88 0 0 30 42 33 2 9 44.6 71 147 -33 30 55 41 30 29 26 31 18 33 30 6 37 -0.08 - 89 0 0 31 31 44 2 10 9.5 70 146 -32 31 44 47 31 18 41 32 7 32 30 55 59 -0.08 - 90 0 0 32 19 55 2 10 33.9 69 145 -31 32 32 54 32 6 56 32 55 31 31 44 22 -0.08 - 91 0 0 33 7 6 2 10 57.7 68 144 -30 33 20 0 32 54 12 33 42 30 32 31 46 -0.08 - 92 0 0 33 53 17 2 11 21.1 67 144 -30 34 6 7 33 40 28 34 28 29 33 18 10 -0.08 - 93 0 0 34 38 29 2 11 44.0 66 143 -29 34 51 14 34 25 44 35 13 28 34 3 33 -0.08 - 94 0 0 35 22 40 2 12 6.3 65 142 -28 35 35 21 35 10 0 35 57 26 34 47 58 -0.08 - 95 0 0 36 5 52 2 12 28.2 64 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15.9 34 112 -3 52 55 32 52 35 31 53 12 59 52 18 5 -0.08 -134 0 0 52 58 9 2 21 24.0 33 112 -3 53 8 7 52 48 11 53 25 29 52 30 49 -0.08 -135 0 0 53 10 13 2 21 32.0 33 111 -2 53 20 9 53 0 17 53 37 27 52 43 1 -0.07 -136 0 0 53 21 45 2 21 39.7 32 110 -2 53 31 38 53 11 52 53 48 52 52 54 39 -0.07 -137 0 0 53 32 45 2 21 47.2 32 109 -1 53 42 36 53 22 54 53 59 45 53 5 45 -0.07 -138 0 0 53 43 13 2 21 54.6 31 109 -1 53 53 2 53 33 24 54 10 7 53 16 19 -0.07 -139 0 0 53 53 9 2 22 1.8 30 108 0 54 2 56 53 43 23 54 19 58 53 26 21 -0.07 -140 0 0 54 2 35 2 22 8.8 30 107 0 54 12 20 53 52 50 54 29 19 53 35 53 -0.07 -141 0 0 54 11 31 2 22 15.6 29 106 1 54 21 14 54 1 48 54 38 9 53 44 53 -0.07 -142 0 0 54 19 56 2 22 22.3 29 105 1 54 29 37 54 10 15 54 46 29 53 53 24 -0.07 -143 0 0 54 27 52 2 22 28.8 28 105 1 54 37 31 54 18 12 54 54 20 54 1 24 -0.07 -144 0 0 54 35 18 2 22 35.1 27 104 2 54 44 56 54 25 40 55 1 42 54 8 55 -0.07 -145 0 0 54 42 15 2 22 41.3 27 103 2 54 51 51 54 32 39 55 8 35 54 15 56 -0.07 -146 0 0 54 48 43 2 22 47.4 26 102 3 54 58 18 54 39 9 55 15 0 54 22 28 -0.07 -147 0 0 54 54 43 2 22 53.3 26 101 3 55 4 17 54 45 10 55 20 56 54 28 31 -0.07 -148 0 0 55 0 15 2 22 59.1 25 101 4 55 9 47 54 50 42 55 26 24 54 34 6 -0.07 -149 0 0 55 5 18 2 23 4.7 25 100 4 55 14 49 54 55 47 55 31 24 54 39 13 -0.07 -150 0 0 55 9 53 2 23 10.2 24 99 5 55 19 24 55 0 23 55 35 57 54 43 51 -0.07 -151 0 0 55 14 1 2 23 15.5 23 98 5 55 23 30 55 4 32 55 40 2 54 48 1 -0.07 -152 0 0 55 17 41 2 23 20.7 23 97 6 55 27 10 55 8 13 55 43 40 54 51 43 -0.07 -153 0 0 55 20 54 2 23 25.8 22 96 6 55 30 22 55 11 26 55 46 50 54 54 58 -0.07 -154 0 0 55 23 39 2 23 30.8 22 96 6 55 33 6 55 14 12 55 49 34 54 57 45 -0.06 -155 0 0 55 25 57 2 23 35.6 21 95 7 55 35 24 55 16 31 55 51 51 55 0 5 -0.06 -156 0 0 55 27 48 2 23 40.3 21 94 7 55 37 14 55 18 22 55 53 40 55 1 57 -0.06 -157 0 0 55 29 12 2 23 44.9 20 93 8 55 38 38 55 19 46 55 55 3 55 3 22 -0.06 -158 0 0 55 30 9 2 23 49.4 20 92 8 55 39 34 55 20 43 55 55 59 55 4 19 -0.06 -159 0 0 55 30 38 2 23 53.7 19 92 9 55 40 4 55 21 13 55 56 29 55 4 49 -0.06 -160 0 0 55 30 41 2 23 57.9 18 91 9 55 40 6 55 21 16 55 56 31 55 4 51 -0.06 -161 0 0 55 30 16 2 24 2.0 18 90 10 55 39 42 55 20 51 55 56 7 55 4 27 -0.06 -162 0 0 55 29 24 2 24 6.0 17 89 10 55 38 50 55 19 59 55 55 15 55 3 34 -0.06 -163 0 0 55 28 5 2 24 9.9 17 88 10 55 37 31 55 18 39 55 53 57 55 2 14 -0.06 -164 0 0 55 26 19 2 24 13.6 16 88 11 55 35 45 55 16 53 55 52 11 55 0 27 -0.06 -165 0 0 55 24 5 2 24 17.3 16 87 11 55 33 31 55 14 38 55 49 58 54 58 12 -0.06 -166 0 0 55 21 23 2 24 20.8 15 86 12 55 30 50 55 11 56 55 47 18 54 55 28 -0.06 -167 0 0 55 18 13 2 24 24.2 15 85 12 55 27 41 55 8 45 55 44 11 54 52 17 -0.06 -168 0 0 55 14 36 2 24 27.5 14 84 13 55 24 4 55 5 7 55 40 35 54 48 37 -0.06 -169 0 0 55 10 30 2 24 30.7 13 84 13 55 19 59 55 1 0 55 36 31 54 44 28 -0.06 -170 0 0 55 5 55 2 24 33.7 13 83 13 55 15 26 54 56 25 55 32 0 54 39 51 -0.06 -171 0 0 55 0 52 2 24 36.7 12 82 14 55 10 24 54 51 20 55 26 59 54 34 45 -0.06 -172 0 0 54 55 19 2 24 39.5 12 81 14 55 4 52 54 45 46 55 21 30 54 29 9 -0.06 -173 0 0 54 49 18 2 24 42.2 11 80 15 54 58 52 54 39 43 55 15 32 54 23 4 -0.06 -174 0 0 54 42 46 2 24 44.8 11 80 15 54 52 22 54 33 10 55 9 4 54 16 28 -0.06 -175 0 0 54 35 44 2 24 47.3 10 79 16 54 45 21 54 26 7 55 2 7 54 9 22 -0.06 -176 0 0 54 28 12 2 24 49.6 9 78 16 54 37 51 54 18 33 54 54 39 54 1 45 -0.06 -177 0 0 54 20 8 2 24 51.8 9 77 17 54 29 49 54 10 28 54 46 41 53 53 37 -0.06 -178 0 0 54 11 33 2 24 53.9 8 76 17 54 21 16 54 1 51 54 38 11 53 44 57 -0.06 -179 0 0 54 2 26 2 24 55.8 8 75 18 54 12 11 53 52 42 54 29 9 53 35 44 -0.06 -180 0 0 53 52 47 2 24 57.7 7 75 18 54 2 34 53 43 0 54 19 36 53 25 59 -0.06 179 0 0 53 42 34 2 24 59.3 6 74 18 53 52 24 53 32 45 54 9 29 53 15 40 -0.06 178 0 0 53 31 48 2 25 0.9 6 73 19 53 41 40 53 21 57 53 58 50 53 4 47 -0.06 177 0 0 53 20 28 2 25 2.3 5 72 19 53 30 22 53 10 34 53 47 36 52 53 20 -0.06 176 0 0 53 8 32 2 25 3.5 4 72 20 53 18 29 52 58 36 53 35 48 52 41 17 -0.06 175 0 0 52 56 1 2 25 4.6 4 71 20 53 6 0 52 46 2 53 23 24 52 28 38 -0.07 174 0 0 52 42 53 2 25 5.6 3 70 21 52 52 56 52 32 51 53 10 24 52 15 23 -0.07 173 0 0 52 29 8 2 25 6.4 3 69 21 52 39 14 52 19 3 52 56 48 52 1 30 -0.08 172 0 0 52 14 45 2 25 7.0 2 68 22 52 24 54 52 4 37 52 42 33 51 46 58 -0.09 171 0 0 51 59 44 2 25 7.4 1 68 22 52 9 55 51 49 32 52 27 41 51 31 47 -0.13 170 0 0 51 44 2 2 25 7.7 1 67 23 51 54 17 51 33 47 52 12 8 51 15 56 -0.23 Uncertainty in time = +/- 8 secs Prediction of 2020 Dec 31.0 Data for the target star ------------------------ * name: TYC 0745-00310-1 * constellation : Gemini * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 06 38 13.8487 DE: +14 41 34.238 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 06 38 13.8486 DE: +14 41 34.238 * 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: (289) Nenetta asteroid class: approx. diameter [km]: 35 approx. diameter ["]: 0.023 distance from Earth [AU]: 2.11360 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: Preston date of fit: 2020 Dec 12 source of used astrometry: MPC, FASTT, TMO number of used observations: 3250 number of rejected observations: 9 time covered by the observations: 1960 Jun 16 - 2020 Oct 20 1 sigma uncertainty ellipse (major, minor, PA): 0.025", 0.011", 93.1° remarks: * orbital elements for (289)Nenetta : Mean anomaly = 78.24902134 deg Arg. of pericenter = 190.49261193 deg Long. of node = 181.93629741 deg Inclination = 6.67888220 deg Eccentricity = 0.20146891 Semimajor axis = 2.87650304 AU Perihelion dist = 2.29697712 AU Mag: H = 9.50, G = 0.15 Epoch of elements : MJD 59260.08500000 TDT (2021 Feb 15.0850) ------ occelmnt file for Occult BEGIN ----------------------------------- Preston2020Dec12,7.4,2021,2,15,2.0470,0.04634,0.03857,-1.71113,2.06168,0.00439,0.00029,0.00000,0.00000 -76.1488,14.6731,152.83,-12.64,False TYC 0745-00310-1,6.63718018,14.6928440,0.00,11.49,0.00,0.0,0,,6.65723280,14.6731191 289,Nenetta,14.24,34.9,2.1136,0,0,-0.490,8.58,,2.6 0,78.0298,2021,2,14,190.4926,181.9363,6.6789,0.20147,2.87650,2.29698,9.50,5.0,0.15 1.871,0.0250,0.0110,93,0.0198,Known errors 20210215_0310-1,59214.00 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2020 Dec 31, 01:13 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org