IOTA/IOTA-ES occultation update for (1630) Milet / TYC 291-00360-1 event on 2021 Feb 26, 14:14 UT Visible from New Zealand, N Australia Summary ------- On 2021 Feb 26 UT, the 19.5 km diameter asteroid (1630) Milet will occult a 8.7 mag star in the constellation Virgo for observers along a path across New Zealand, N Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 6.84 mag to 15.54 mag (the magnitude of the asteroid) for at most 3.5 seconds. This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Hugh Harris, 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: 49 * date and approx. time of event: 2021 Feb 26, 13:58 - 2021 Feb 26, 14:29 * geocentric midpoint of event [JD]: 2459272.09305417 * magnitude of target star: 8.70 * magnitude drop [mag]: 6.84 * estimated maximum duration [s]: 3.5 * Moon: 99 % sunlit, 43° distance * Sun: 145° distance * rough path description: New Zealand, N Australia Additional comments ------------------- RUWE high The occultation path -------------------- * approximate projected width [km]: 24 * 1 sigma uncertainty interval [path widths]: +/- 1.32 * 1 sigma uncertainty interval [seconds]: +/- 10.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.043, +/- 0.029) * 1 sigma uncertainty ellipse (major, minor, PA): (0.048", 0.021", 118°) * approx speed of asteroid's shadow [km/s]: 5.5847 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 291-00360-1 by 1630 Milet on 2021 Feb 26 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 90 0 0 -10 16 26 14 29 19.2 0 90 -31 -10 9 52 -10 23 1 .. .. .. -10 40 28 .... 91 0 0 -10 16 35 14 29 18.8 1 89 -32 -10 10 1 -10 23 10 .. .. .. -10 40 36 0.47 92 0 0 -10 17 18 14 29 18.0 2 89 -33 -10 10 44 -10 23 52 .. .. .. -10 41 19 0.58 93 0 0 -10 18 34 14 29 16.8 3 89 -34 -10 12 1 -10 25 9 - 9 54 41 -10 42 35 0.63 94 0 0 -10 20 25 14 29 15.2 4 89 -35 -10 13 51 -10 26 59 - 9 56 32 -10 44 25 0.65 95 0 0 -10 22 48 14 29 13.2 5 89 -36 -10 16 14 -10 29 22 - 9 58 55 -10 46 48 0.67 96 0 0 -10 25 44 14 29 10.8 6 89 -37 -10 19 11 -10 32 18 -10 1 51 -10 49 44 0.68 97 0 0 -10 29 14 14 29 8.0 7 88 -38 -10 22 40 -10 35 48 -10 5 21 -10 53 14 0.68 98 0 0 -10 33 16 14 29 4.8 8 88 -39 -10 26 42 -10 39 50 -10 9 23 -10 57 16 0.69 99 0 0 -10 37 50 14 29 1.2 9 88 -40 -10 31 17 -10 44 25 -10 13 57 -11 1 51 0.69 100 0 0 -10 42 57 14 28 57.1 10 88 -40 -10 36 23 -10 49 32 -10 19 3 -11 6 59 0.70 101 0 0 -10 48 37 14 28 52.7 11 88 -41 -10 42 2 -10 55 11 -10 24 42 -11 12 39 0.70 102 0 0 -10 54 48 14 28 47.9 12 87 -42 -10 48 13 -11 1 23 -10 30 52 -11 18 51 0.70 103 0 0 -11 1 31 14 28 42.8 13 87 -43 -10 54 56 -11 8 6 -10 37 34 -11 25 34 0.70 104 0 0 -11 8 45 14 28 37.2 14 87 -44 -11 2 10 -11 15 20 -10 44 47 -11 32 50 0.70 105 0 0 -11 16 31 14 28 31.3 15 87 -45 -11 9 55 -11 23 6 -10 52 32 -11 40 37 0.70 106 0 0 -11 24 48 14 28 24.9 16 86 -45 -11 18 12 -11 31 24 -11 0 48 -11 48 55 0.71 107 0 0 -11 33 35 14 28 18.2 17 86 -46 -11 26 59 -11 40 12 -11 9 34 -11 57 44 0.71 108 0 0 -11 42 54 14 28 11.2 18 86 -47 -11 36 17 -11 49 31 -11 18 51 -12 7 4 0.71 109 0 0 -11 52 43 14 28 3.8 19 86 -48 -11 46 6 -11 59 20 -11 28 38 -12 16 54 0.71 110 0 0 -12 3 2 14 27 56.0 20 85 -49 -11 56 24 -12 9 40 -11 38 56 -12 27 15 0.71 111 0 0 -12 13 51 14 27 47.8 20 85 -49 -12 7 13 -12 20 29 -11 49 43 -12 38 6 0.71 112 0 0 -12 25 10 14 27 39.3 21 85 -50 -12 18 31 -12 31 49 -12 1 0 -12 49 27 0.71 113 0 0 -12 36 58 14 27 30.5 22 84 -51 -12 30 19 -12 43 38 -12 12 46 -13 1 17 0.71 114 0 0 -12 49 16 14 27 21.3 23 84 -51 -12 42 36 -12 55 56 -12 25 2 -13 13 37 0.71 115 0 0 -13 2 3 14 27 11.7 24 84 -52 -12 55 23 -13 8 43 -12 37 46 -13 26 26 0.71 116 0 0 -13 15 18 14 27 1.8 25 83 -53 -13 8 37 -13 21 59 -12 51 0 -13 39 44 0.71 117 0 0 -13 29 2 14 26 51.6 26 83 -53 -13 22 21 -13 35 44 -13 4 41 -13 53 30 0.71 118 0 0 -13 43 14 14 26 41.1 27 83 -54 -13 36 32 -13 49 57 -13 18 51 -14 7 45 0.71 119 0 0 -13 57 55 14 26 30.2 28 82 -55 -13 51 12 -14 4 38 -13 33 29 -14 22 28 0.71 120 0 0 -14 13 2 14 26 19.0 29 82 -55 -14 6 19 -14 19 46 -13 48 34 -14 37 39 0.71 121 0 0 -14 28 38 14 26 7.5 29 81 -56 -14 21 54 -14 35 23 -14 4 6 -14 53 17 0.71 122 0 0 -14 44 40 14 25 55.7 30 81 -56 -14 37 55 -14 51 26 -14 20 6 -15 9 22 0.71 123 0 0 -15 1 10 14 25 43.5 31 80 -57 -14 54 24 -15 7 56 -14 36 32 -15 25 55 0.71 124 0 0 -15 18 5 14 25 31.1 32 80 -57 -15 11 19 -15 24 53 -14 53 25 -15 42 54 0.71 125 0 0 -15 35 27 14 25 18.4 33 79 -58 -15 28 40 -15 42 16 -15 10 44 -16 0 19 0.71 126 0 0 -15 53 15 14 25 5.3 34 79 -58 -15 46 27 -16 0 4 -15 28 29 -16 18 10 0.71 127 0 0 -16 11 29 14 24 52.0 35 78 -58 -16 4 39 -16 18 19 -15 46 39 -16 36 27 0.71 128 0 0 -16 30 7 14 24 38.5 35 78 -59 -16 23 17 -16 36 58 -16 5 14 -16 55 9 0.71 129 0 0 -16 49 11 14 24 24.6 36 77 -59 -16 42 20 -16 56 3 -16 24 15 -17 14 16 0.71 130 0 0 -17 8 39 14 24 10.5 37 76 -59 -17 1 47 -17 15 32 -16 43 39 -17 33 47 0.71 131 0 0 -17 28 31 14 23 56.1 38 76 -60 -17 21 38 -17 35 25 -17 3 28 -17 53 43 0.71 132 0 0 -17 48 47 14 23 41.5 39 75 -60 -17 41 53 -17 55 42 -17 23 40 -18 14 3 0.71 133 0 0 -18 9 27 14 23 26.6 39 74 -60 -18 2 31 -18 16 22 -17 44 16 -18 34 46 0.71 134 0 0 -18 30 29 14 23 11.5 40 73 -60 -18 23 33 -18 37 26 -18 5 14 -18 55 52 0.71 135 0 0 -18 51 54 14 22 56.1 41 72 -60 -18 44 57 -18 58 52 -18 26 36 -19 17 21 0.71 136 0 0 -19 13 41 14 22 40.5 42 72 -60 -19 6 43 -19 20 40 -18 48 19 -19 39 12 0.71 137 0 0 -19 35 50 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11 27 -36 7 12 0.75 174 0 0 -36 8 6 14 11 26.9 52 17 -40 -36 0 28 -36 15 46 -35 40 17 -36 36 8 0.75 175 0 0 -36 36 58 14 11 9.5 52 15 -39 -36 29 18 -36 44 38 -36 9 6 -37 5 1 0.75 176 0 0 -37 5 46 14 10 52.2 52 13 -39 -36 58 5 -37 13 27 -36 37 51 -37 33 52 0.75 177 0 0 -37 34 30 14 10 35.1 52 12 -38 -37 26 49 -37 42 12 -37 6 34 -38 2 39 0.75 178 0 0 -38 3 10 14 10 18.1 51 10 -37 -37 55 29 -38 10 53 -37 35 12 -38 31 21 0.75 179 0 0 -38 31 45 14 10 1.3 51 9 -36 -38 24 3 -38 39 28 -38 3 45 -38 59 58 0.75 -180 0 0 -39 0 15 14 9 44.7 51 7 -35 -38 52 32 -39 7 58 -38 32 12 -39 28 30 0.75 -179 0 0 -39 28 37 14 9 28.2 50 6 -35 -39 20 54 -39 36 21 -39 0 33 -39 56 54 0.75 -178 0 0 -39 56 53 14 9 11.9 50 4 -34 -39 49 9 -40 4 37 -39 28 47 -40 25 11 0.75 -177 0 0 -40 25 0 14 8 55.8 49 3 -33 -40 17 16 -40 32 45 -39 56 53 -40 53 20 0.75 -176 0 0 -40 52 59 14 8 39.9 49 1 -32 -40 45 15 -41 0 44 -40 24 51 -41 21 20 0.76 -175 0 0 -41 20 48 14 8 24.2 48 360 -31 -41 13 4 -41 28 34 -40 52 39 -41 49 10 0.76 -174 0 0 -41 48 28 14 8 8.8 48 358 -31 -41 40 43 -41 56 14 -41 20 18 -42 16 51 0.76 -173 0 0 -42 15 57 14 7 53.5 47 357 -30 -42 8 12 -42 23 43 -41 47 46 -42 44 20 0.76 -172 0 0 -42 43 14 14 7 38.4 47 356 -29 -42 35 29 -42 51 0 -42 15 3 -43 11 38 0.76 -171 0 0 -43 10 20 14 7 23.6 46 354 -28 -43 2 35 -43 18 6 -42 42 9 -43 38 44 0.76 -170 0 0 -43 37 13 14 7 9.0 46 353 -27 -43 29 28 -43 44 59 -43 9 2 -44 5 37 0.76 -169 0 0 -44 3 53 14 6 54.6 45 352 -27 -43 56 8 -44 11 39 -43 35 42 -44 32 17 0.76 -168 0 0 -44 30 20 14 6 40.5 45 350 -26 -44 22 35 -44 38 6 -44 2 8 -44 58 43 0.76 -167 0 0 -44 56 32 14 6 26.6 44 349 -25 -44 48 47 -45 4 18 -44 28 21 -45 24 55 0.76 -166 0 0 -45 22 29 14 6 12.9 44 348 -24 -45 14 45 -45 30 15 -44 54 19 -45 50 52 0.76 -165 0 0 -45 48 11 14 5 59.4 43 347 -23 -45 40 27 -45 55 57 -45 20 2 -46 16 33 0.76 -164 0 0 -46 13 38 14 5 46.3 43 346 -23 -46 5 54 -46 21 23 -45 45 30 -46 41 58 0.76 -163 0 0 -46 38 48 14 5 33.3 42 344 -22 -46 31 4 -46 46 33 -46 10 41 -47 7 7 0.76 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-55 24 39 14 1 27.5 27 319 -5 -55 17 18 -55 32 2 -54 57 53 -55 51 36 0.76 -137 0 0 -55 41 13 14 1 20.5 27 318 -4 -55 33 53 -55 48 34 -55 14 31 -56 8 5 0.76 -136 0 0 -55 57 26 14 1 13.8 26 317 -3 -55 50 7 -56 4 46 -55 30 49 -56 24 13 0.76 -135 0 0 -56 13 18 14 1 7.2 26 316 -3 -56 6 0 -56 20 36 -55 46 45 -56 40 1 0.76 -134 0 0 -56 28 49 14 1 0.9 25 316 -2 -56 21 32 -56 36 6 -56 2 21 -56 55 27 0.76 -133 0 0 -56 43 59 14 0 54.7 24 315 -2 -56 36 44 -56 51 15 -56 17 35 -57 10 32 0.76 -132 0 0 -56 58 48 14 0 48.7 24 314 -1 -56 51 34 -57 6 3 -56 32 29 -57 25 17 0.76 -131 0 0 -57 13 17 14 0 42.9 23 313 0 -57 6 4 -57 20 30 -56 47 3 -57 39 41 0.76 -130 0 0 -57 27 25 14 0 37.3 23 312 0 -57 20 14 -57 34 37 -57 1 16 -57 53 44 0.76 -129 0 0 -57 41 13 14 0 31.9 22 311 1 -57 34 3 -57 48 24 -57 15 8 -58 7 27 0.76 -128 0 0 -57 54 40 14 0 26.6 22 310 1 -57 47 32 -58 1 50 -57 28 40 -58 20 50 0.76 -127 0 0 -58 7 48 14 0 21.5 21 309 2 -58 0 40 -58 14 56 -57 41 52 -58 33 52 0.76 -126 0 0 -58 20 35 14 0 16.5 21 308 2 -58 13 29 -58 27 42 -57 54 44 -58 46 35 0.76 -125 0 0 -58 33 2 14 0 11.7 20 307 3 -58 25 57 -58 40 8 -58 7 16 -58 58 58 0.76 -124 0 0 -58 45 10 14 0 7.1 20 307 4 -58 38 6 -58 52 14 -58 19 28 -59 11 1 0.76 -123 0 0 -58 56 58 14 0 2.6 19 306 4 -58 49 55 -59 4 1 -58 31 20 -59 22 44 0.76 -122 0 0 -59 8 26 13 59 58.3 19 305 5 -59 1 25 -59 15 28 -58 42 53 -59 34 8 0.76 -121 0 0 -59 19 35 13 59 54.1 18 304 5 -59 12 35 -59 26 36 -58 54 7 -59 45 12 0.76 -120 0 0 -59 30 25 13 59 50.1 18 303 6 -59 23 26 -59 37 25 -59 5 1 -59 55 58 0.76 -119 0 0 -59 40 56 13 59 46.2 17 302 6 -59 33 58 -59 47 54 -59 15 36 -60 6 24 0.76 -118 0 0 -59 51 8 13 59 42.5 16 301 7 -59 44 11 -59 58 5 -59 25 52 -60 16 32 0.76 -117 0 0 -60 1 1 13 59 38.9 16 300 7 -59 54 6 -60 7 57 -59 35 50 -60 26 21 0.76 -116 0 0 -60 10 36 13 59 35.4 15 299 8 -60 3 41 -60 17 30 -59 45 28 -60 35 51 0.76 -115 0 0 -60 19 52 13 59 32.0 15 299 8 -60 12 59 -60 26 45 -59 54 49 -60 45 3 0.76 -114 0 0 -60 28 49 13 59 28.8 14 298 9 -60 21 57 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-61 29 3 -62 17 48 0.76 -101 0 0 -61 58 33 13 58 57.8 8 286 15 -61 51 53 -62 5 14 -61 34 18 -62 22 57 0.76 -100 0 0 -62 3 28 13 58 56.2 8 285 15 -61 56 49 -62 10 8 -61 39 15 -62 27 49 0.76 - 99 0 0 -62 8 7 13 58 54.7 7 284 16 -62 1 28 -62 14 46 -61 43 56 -62 32 25 0.76 - 98 0 0 -62 12 29 13 58 53.3 7 284 16 -62 5 51 -62 19 7 -61 48 20 -62 36 44 0.76 - 97 0 0 -62 16 34 13 58 51.9 6 283 17 -62 9 57 -62 23 12 -61 52 28 -62 40 48 0.77 - 96 0 0 -62 20 23 13 58 50.7 6 282 17 -62 13 47 -62 27 1 -61 56 20 -62 44 35 0.77 - 95 0 0 -62 23 57 13 58 49.6 5 281 17 -62 17 21 -62 30 33 -61 59 55 -62 48 6 0.77 - 94 0 0 -62 27 14 13 58 48.6 5 280 18 -62 20 38 -62 33 50 -62 3 14 -62 51 21 0.77 - 93 0 0 -62 30 15 13 58 47.6 4 279 18 -62 23 39 -62 36 50 -62 6 16 -62 54 20 0.78 - 92 0 0 -62 32 59 13 58 46.8 4 278 19 -62 26 25 -62 39 35 -62 9 3 -62 57 3 0.78 - 91 0 0 -62 35 28 13 58 46.1 3 277 19 -62 28 54 -62 42 3 -62 11 33 -62 59 31 0.78 - 90 0 0 -62 37 41 13 58 45.4 3 277 20 -62 31 8 -62 44 16 -62 13 48 -63 1 43 0.79 - 89 0 0 -62 39 39 13 58 44.9 3 276 20 -62 33 5 -62 46 13 -62 15 46 -63 3 38 0.80 - 88 0 0 -62 41 20 13 58 44.4 2 275 20 -62 34 47 -62 47 54 -62 17 29 -63 5 19 0.81 - 87 0 0 -62 42 45 13 58 44.0 2 274 21 -62 36 12 -62 49 19 -62 18 55 -63 6 43 0.83 - 86 0 0 -62 43 55 13 58 43.7 1 273 21 -62 37 22 -62 50 28 -62 20 6 -63 7 52 0.87 - 85 0 0 -62 44 49 13 58 43.5 1 272 22 -62 38 16 -62 51 22 -62 21 0 -63 8 45 0.96 - 84 0 0 -62 45 27 13 58 43.4 0 271 22 -62 38 55 -62 52 0 -62 21 39 -63 9 22 1.34 Uncertainty in time = +/- 11 secs Prediction of 2020 Dec 31.0 Data for the target star ------------------------ * name: TYC 291-00360-1 * constellation : Virgo * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 12 53 06.8812 DE: +00 26 41.202 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 12 53 06.8813 DE: +00 26 41.202 * position source: Gaia EDR3 * standard error: RA,DE [mas]: (0.300,0.300) * V mag [mag]: 8.7 * B mag [mag]: 9.9 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1630) Milet asteroid class: approx. diameter [km]: 20 approx. diameter ["]: 0.016 distance from Earth [AU]: 1.69010 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: Preston date of fit: 2020 Dec 31 source of used astrometry: MPC, FASTT number of used observations: 2694 number of rejected observations: 6 time covered by the observations: 1960 Sep 24 - 2020 Oct 21 1 sigma uncertainty ellipse (major, minor, PA): 0.048", 0.021", 118.1° remarks: * orbital elements for (1630)Milet : Mean anomaly = 21.10648600 deg Arg. of pericenter = 95.28878890 deg Long. of node = 54.45015702 deg Inclination = 4.53656918 deg Eccentricity = 0.16842563 Semimajor axis = 3.02937833 AU Perihelion dist = 2.51915338 AU Mag: H = 11.60, G = 0.15 Epoch of elements : MJD 59271.59300000 TDT (2021 Feb 26.5930) ------ occelmnt file for Occult BEGIN ----------------------------------- Preston2020Dec31,3.5,2021,2,26,14.2333,-0.26131,-0.53194,-2.82963,1.38901,-0.00316,0.00082,0.00000,0.00000 -176.5956,0.3296,-30.29,-8.49,False TYC 291-00360-1,12.88524480,0.4447782,9.90,8.70,8.05,0.0,0,,12.90332313,0.3295598 1630,Milet,15.54,19.5,1.6901,0,0,-0.982,7.23,,1.4 0,20.9956,2021,2,26,95.2888,54.4502,4.5366,0.16843,3.02938,2.51915,11.60,5.0,0.15 2.323,0.0480,0.0210,118,0.0211,Known errors 20210226_0360-1,59214.00 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2020 Dec 31, 01:54 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org