IOTA/IOTA-ES occultation update for (9) Metis / TYC 1311-00099-1 event on 2023 Sep 19, 02:05 UT Visible from Africa Summary ------- On 2023 Sep 19 UT, the 169.6 km diameter asteroid (9) Metis will occult a 9.6 mag star in the constellation Taurus for observers along a path across Africa. In the case of an occultation, the combined light of the asteroid and the star will drop by 1.34 mag to 10.54 mag (the magnitude of the asteroid) for at most 8.740 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 Sep 19, 02:00 - 2023 Sep 19, 02:10 * geocentric midpoint of event [JD]: 2460206.58725279 * magnitude of target star: 9.58 * magnitude drop [mag]: 1.34 * estimated maximum duration [s]: 8.740 * Moon: 15 % sunlit, 134° distance * Sun: 89° distance * rough path description: Africa The occultation path -------------------- * approximate projected width [km]: 199 * 1 sigma uncertainty interval [path widths]: +/- 0.02 * 1 sigma uncertainty interval [seconds]: +/- 0.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.004, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.004", 0.002", 82°) * approx speed of asteroid's shadow [km/s]: 19.3999 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1311-00099-1 by 9 Metis on 2023 Sep 19 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 - 15 0 0 -34 42 21 2 0 58.6 0 63 -54 .. .. .. -33 42 20 .. .. .. -33 40 16 .... - 14 0 0 -34 16 38 2 0 58.6 1 62 -53 -35 17 22 -33 16 36 -35 19 29 -33 14 32 0.11 - 13 0 0 -33 50 47 2 0 58.7 2 62 -53 -34 51 31 -32 50 45 -34 53 38 -32 48 41 0.35 - 12 0 0 -33 24 48 2 0 59.0 3 61 -53 -34 25 32 -32 24 47 -34 27 39 -32 22 43 0.44 - 11 0 0 -32 58 43 2 0 59.3 4 60 -53 -33 59 26 -31 58 42 -34 1 33 -31 56 38 0.48 - 10 0 0 -32 32 31 2 0 59.8 5 60 -53 -33 33 14 -31 32 32 -33 35 21 -31 30 28 0.50 - 9 0 0 -32 6 15 2 1 0.4 6 59 -53 -33 6 56 -31 6 17 -33 9 3 -31 4 13 0.52 - 8 0 0 -31 39 54 2 1 1.1 7 59 -53 -32 40 34 -30 39 57 -32 42 41 -30 37 53 0.53 - 7 0 0 -31 13 29 2 1 1.8 8 58 -52 -32 14 7 -30 13 33 -32 16 14 -30 11 29 0.54 - 6 0 0 -30 47 0 2 1 2.8 9 58 -52 -31 47 37 -29 47 7 -31 49 43 -29 45 3 0.55 - 5 0 0 -30 20 30 2 1 3.8 10 57 -52 -31 21 4 -29 20 39 -31 23 10 -29 18 35 0.55 - 4 0 0 -29 53 57 2 1 4.9 10 57 -51 -30 54 29 -28 54 9 -30 56 35 -28 52 5 0.56 - 3 0 0 -29 27 24 2 1 6.1 11 56 -51 -30 27 52 -28 27 38 -30 29 59 -28 25 34 0.56 - 2 0 0 -29 0 50 2 1 7.5 12 56 -51 -30 1 16 -28 1 7 -30 3 22 -27 59 4 0.56 - 1 0 0 -28 34 17 2 1 9.0 13 55 -50 -29 34 39 -27 34 38 -29 36 46 -27 32 34 0.57 - 0 0 0 -28 7 46 2 1 10.6 14 55 -50 -29 8 4 -27 8 9 -29 10 10 -27 6 6 0.57 1 0 0 -27 41 16 2 1 12.3 15 54 -49 -28 41 30 -26 41 43 -28 43 37 -26 39 40 0.57 2 0 0 -27 14 49 2 1 14.1 16 54 -49 -28 15 0 -26 15 20 -28 17 5 -26 13 17 0.57 3 0 0 -26 48 26 2 1 16.0 17 53 -48 -27 48 32 -25 49 1 -27 50 38 -25 46 59 0.58 4 0 0 -26 22 7 2 1 18.1 18 53 -48 -27 22 9 -25 22 47 -27 24 14 -25 20 44 0.58 5 0 0 -25 55 53 2 1 20.3 19 52 -47 -26 55 50 -24 56 38 -26 57 56 -24 54 35 0.58 6 0 0 -25 29 45 2 1 22.6 20 52 -46 -26 29 37 -24 30 35 -26 31 43 -24 28 32 0.58 7 0 0 -25 3 44 2 1 25.0 21 51 -46 -26 3 31 -24 4 39 -26 5 36 -24 2 36 0.58 8 0 0 -24 37 51 2 1 27.5 22 51 -45 -25 37 32 -23 38 50 -25 39 37 -23 36 48 0.58 9 0 0 -24 12 5 2 1 30.1 23 50 -45 -25 11 41 -23 13 10 -25 13 46 -23 11 8 0.58 10 0 0 -23 46 29 2 1 32.9 24 50 -44 -24 45 59 -22 47 39 -24 48 3 -22 45 37 0.58 11 0 0 -23 21 2 2 1 35.7 25 49 -43 -24 20 26 -22 22 18 -24 22 30 -22 20 16 0.59 12 0 0 -22 55 45 2 1 38.7 26 48 -42 -23 55 4 -21 57 7 -23 57 8 -21 55 6 0.59 13 0 0 -22 30 40 2 1 41.8 27 48 -42 -23 29 52 -21 32 7 -23 31 56 -21 30 6 0.59 14 0 0 -22 5 46 2 1 45.0 28 47 -41 -23 4 52 -21 7 20 -23 6 56 -21 5 19 0.59 15 0 0 -21 41 5 2 1 48.3 29 47 -40 -22 40 5 -20 42 45 -22 42 8 -20 40 45 0.59 16 0 0 -21 16 38 2 1 51.7 30 46 -39 -22 15 31 -20 18 24 -22 17 34 -20 16 23 0.59 17 0 0 -20 52 24 2 1 55.2 31 46 -39 -21 51 10 -19 54 16 -21 53 13 -19 52 16 0.59 18 0 0 -20 28 25 2 1 58.8 32 45 -38 -21 27 5 -19 30 24 -21 29 7 -19 28 24 0.59 19 0 0 -20 4 41 2 2 2.5 33 44 -37 -21 3 14 -19 6 47 -21 5 16 -19 4 47 0.59 20 0 0 -19 41 13 2 2 6.3 34 44 -36 -20 39 39 -18 43 25 -20 41 41 -18 41 26 0.59 21 0 0 -19 18 2 2 2 10.2 35 43 -35 -20 16 21 -18 20 21 -20 18 23 -18 18 21 0.59 22 0 0 -18 55 7 2 2 14.2 36 43 -34 -19 53 20 -17 57 33 -19 55 21 -17 55 34 0.59 23 0 0 -18 32 31 2 2 18.3 37 42 -33 -19 30 36 -17 35 3 -19 32 38 -17 33 4 0.60 24 0 0 -18 10 13 2 2 22.5 38 41 -33 -19 8 11 -17 12 52 -19 10 12 -17 10 53 0.60 25 0 0 -17 48 13 2 2 26.8 38 40 -32 -18 46 5 -16 51 0 -18 48 6 -16 49 1 0.60 26 0 0 -17 26 34 2 2 31.2 39 40 -31 -18 24 18 -16 29 27 -18 26 18 -16 27 28 0.60 27 0 0 -17 5 14 2 2 35.7 40 39 -30 -18 2 51 -16 8 14 -18 4 51 -16 6 16 0.60 28 0 0 -16 44 15 2 2 40.2 41 38 -29 -17 41 45 -15 47 21 -17 43 45 -15 45 24 0.60 29 0 0 -16 23 36 2 2 44.8 42 37 -28 -17 20 59 -15 26 50 -17 22 59 -15 24 53 0.60 30 0 0 -16 3 20 2 2 49.5 43 37 -27 -17 0 36 -15 6 40 -17 2 35 -15 4 43 0.60 31 0 0 -15 43 25 2 2 54.3 44 36 -26 -16 40 34 -14 46 52 -16 42 33 -14 44 55 0.60 32 0 0 -15 23 53 2 2 59.1 45 35 -25 -16 20 55 -14 27 27 -16 22 54 -14 25 30 0.60 33 0 0 -15 4 44 2 3 4.0 45 34 -24 -16 1 39 -14 8 24 -16 3 38 -14 6 28 0.60 34 0 0 -14 45 58 2 3 9.0 46 33 -23 -15 42 46 -13 49 45 -15 44 45 -13 47 49 0.60 35 0 0 -14 27 36 2 3 14.1 47 32 -22 -15 24 17 -13 31 29 -15 26 15 -13 29 33 0.60 36 0 0 -14 9 37 2 3 19.2 48 31 -21 -15 6 12 -13 13 38 -15 8 10 -13 11 42 0.60 37 0 0 -13 52 4 2 3 24.4 48 30 -20 -14 48 32 -12 56 11 -14 50 30 -12 54 15 0.60 38 0 0 -13 34 55 2 3 29.6 49 29 -19 -14 31 17 -12 39 8 -14 33 15 -12 37 13 0.60 39 0 0 -13 18 12 2 3 34.9 50 28 -18 -14 14 27 -12 22 31 -14 16 24 -12 20 36 0.60 40 0 0 -13 1 54 2 3 40.2 51 27 -18 -13 58 3 -12 6 19 -14 0 0 -12 4 24 0.60 41 0 0 -12 46 2 2 3 45.6 51 26 -17 -13 42 4 -11 50 33 -13 44 2 -11 48 39 0.60 42 0 0 -12 30 36 2 3 51.0 52 24 -16 -13 26 32 -11 35 14 -13 28 29 -11 33 19 0.61 43 0 0 -12 15 37 2 3 56.5 53 23 -15 -13 11 27 -11 20 20 -13 13 24 -11 18 26 0.61 44 0 0 -12 1 4 2 4 2.0 53 22 -14 -12 56 49 -11 5 53 -12 58 45 -11 3 59 0.61 45 0 0 -11 46 58 2 4 7.6 54 20 -13 -12 42 37 -10 51 53 -12 44 34 -10 49 59 0.61 46 0 0 -11 33 20 2 4 13.2 54 19 -12 -12 28 54 -10 38 20 -12 30 50 -10 36 26 0.61 47 0 0 -11 20 9 2 4 18.8 55 18 -11 -12 15 37 -10 25 14 -12 17 33 -10 23 21 0.61 48 0 0 -11 7 26 2 4 24.5 55 16 -10 -12 2 49 -10 12 36 -12 4 45 -10 10 43 0.61 49 0 0 -10 55 11 2 4 30.2 56 15 -9 -11 50 29 -10 0 26 -11 52 24 - 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9 19 39 2 8 8.5 46 316 31 -10 14 13 - 8 25 36 -10 16 7 - 8 23 44 0.61 89 0 0 - 9 27 7 2 8 13.4 45 315 32 -10 21 44 - 8 33 1 -10 23 39 - 8 31 9 0.61 90 0 0 - 9 35 4 2 8 18.2 45 315 33 -10 29 45 - 8 40 55 -10 31 39 - 8 39 3 0.61 91 0 0 - 9 43 30 2 8 23.0 44 314 34 -10 38 14 - 8 49 18 -10 40 9 - 8 47 26 0.61 92 0 0 - 9 52 25 2 8 27.7 43 313 35 -10 47 13 - 8 58 9 -10 49 7 - 8 56 17 0.61 93 0 0 -10 1 49 2 8 32.3 42 313 36 -10 56 40 - 9 7 29 -10 58 35 - 9 5 37 0.61 94 0 0 -10 11 41 2 8 36.8 41 312 37 -11 6 36 - 9 17 17 -11 8 31 - 9 15 24 0.61 95 0 0 -10 22 1 2 8 41.3 40 311 38 -11 17 1 - 9 27 33 -11 18 56 - 9 25 41 0.61 96 0 0 -10 32 49 2 8 45.7 39 311 38 -11 27 54 - 9 38 18 -11 29 49 - 9 36 25 0.61 97 0 0 -10 44 6 2 8 50.0 39 310 39 -11 39 15 - 9 49 30 -11 41 10 - 9 47 37 0.61 98 0 0 -10 55 50 2 8 54.2 38 309 40 -11 51 4 -10 1 9 -11 52 59 - 9 59 16 0.61 99 0 0 -11 8 2 2 8 58.4 37 309 41 -12 3 21 -10 13 17 -12 5 16 -10 11 23 0.61 100 0 0 -11 20 42 2 9 2.4 36 308 42 -12 16 5 -10 25 51 -12 18 1 -10 23 58 0.61 101 0 0 -11 33 48 2 9 6.4 35 308 43 -12 29 17 -10 38 53 -12 31 13 -10 36 59 0.61 102 0 0 -11 47 22 2 9 10.3 34 307 44 -12 42 56 -10 52 21 -12 44 52 -10 50 27 0.61 103 0 0 -12 1 22 2 9 14.1 33 307 45 -12 57 1 -11 6 16 -12 58 58 -11 4 22 0.61 104 0 0 -12 15 48 2 9 17.8 32 306 46 -13 11 33 -11 20 37 -13 13 30 -11 18 43 0.61 105 0 0 -12 30 41 2 9 21.4 31 306 47 -13 26 32 -11 35 24 -13 28 29 -11 33 30 0.61 106 0 0 -12 46 0 2 9 24.9 30 305 48 -13 41 56 -11 50 37 -13 43 53 -11 48 42 0.61 107 0 0 -13 1 44 2 9 28.3 29 305 49 -13 57 46 -12 6 15 -13 59 44 -12 4 20 0.61 108 0 0 -13 17 53 2 9 31.6 28 305 49 -14 14 2 -12 22 19 -14 15 59 -12 20 24 0.61 109 0 0 -13 34 28 2 9 34.9 27 304 50 -14 30 43 -12 38 47 -14 32 40 -12 36 52 0.61 110 0 0 -13 51 27 2 9 38.0 26 304 51 -14 47 48 -12 55 40 -14 49 46 -12 53 45 0.61 111 0 0 -14 8 50 2 9 41.0 25 303 52 -15 5 17 -13 12 57 -15 7 16 -13 11 2 0.61 112 0 0 -14 26 37 2 9 43.9 24 303 53 -15 23 11 -13 30 38 -15 25 9 -13 28 42 0.61 113 0 0 -14 44 48 2 9 46.7 23 303 53 -15 41 28 -13 48 42 -15 43 27 -13 46 46 0.61 114 0 0 -15 3 22 2 9 49.4 22 302 54 -16 0 9 -14 7 10 -16 2 7 -14 5 13 0.61 115 0 0 -15 22 18 2 9 51.9 21 302 55 -16 19 12 -14 26 0 -16 21 11 -14 24 3 0.61 116 0 0 -15 41 37 2 9 54.4 20 302 56 -16 38 37 -14 45 12 -16 40 37 -14 43 15 0.61 117 0 0 -16 1 18 2 9 56.8 19 301 56 -16 58 25 -15 4 46 -17 0 24 -15 2 49 0.61 118 0 0 -16 21 20 2 9 59.0 18 301 57 -17 18 34 -15 24 42 -17 20 33 -15 22 45 0.61 119 0 0 -16 41 43 2 10 1.1 17 300 58 -17 39 4 -15 44 58 -17 41 3 -15 43 1 0.61 120 0 0 -17 2 26 2 10 3.1 16 300 58 -17 59 54 -16 5 35 -18 1 54 -16 3 37 0.61 121 0 0 -17 23 30 2 10 5.0 15 300 59 -18 21 4 -16 26 32 -18 23 5 -16 24 34 0.61 122 0 0 -17 44 53 2 10 6.8 14 299 59 -18 42 34 -16 47 48 -18 44 35 -16 45 50 0.61 123 0 0 -18 6 35 2 10 8.5 13 299 60 -19 4 23 -17 9 23 -19 6 24 -17 7 25 0.61 124 0 0 -18 28 35 2 10 10.0 12 299 61 -19 26 30 -17 31 17 -19 28 31 -17 29 18 0.61 125 0 0 -18 50 53 2 10 11.4 11 298 61 -19 48 55 -17 53 29 -19 50 57 -17 51 30 0.62 126 0 0 -19 13 29 2 10 12.7 10 298 61 -20 11 38 -18 15 58 -20 13 39 -18 13 59 0.62 127 0 0 -19 36 21 2 10 13.9 9 298 62 -20 34 37 -18 38 43 -20 36 39 -18 36 44 0.62 128 0 0 -19 59 29 2 10 14.9 8 297 62 -20 57 52 -19 1 45 -20 59 54 -18 59 46 0.62 129 0 0 -20 22 53 2 10 15.9 7 297 62 -21 21 22 -19 25 3 -21 23 25 -19 23 3 0.62 130 0 0 -20 46 32 2 10 16.7 6 297 63 -21 45 8 -19 48 35 -21 47 10 -19 46 36 0.62 131 0 0 -21 10 25 2 10 17.4 5 296 63 -22 9 8 -20 12 22 -22 11 10 -20 10 22 0.63 132 0 0 -21 34 32 2 10 17.9 4 296 63 -22 33 21 -20 36 23 -22 35 24 -20 34 23 0.63 133 0 0 -21 58 52 2 10 18.4 3 296 63 -22 57 47 -21 0 37 -22 59 50 -20 58 36 0.64 134 0 0 -22 23 24 2 10 18.7 2 295 63 -23 22 25 -21 25 3 -23 24 29 -21 23 2 0.66 135 0 0 -22 48 8 2 10 18.9 1 295 63 -23 47 15 -21 49 41 -23 49 19 -21 47 40 0.71 136 0 0 -23 13 3 2 10 19.0 0 294 63 .. .. .. -22 14 30 .. .. .. -22 12 29 1.14 Uncertainty in time = +/- 0 secs Prediction of 2023 Aug 27.0 Data for the target star ------------------------ * name: TYC 1311-00099-1 * constellation : Taurus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 05 45 07.7919 DE: +22 12 23.622 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 05 45 07.7921 DE: +22 12 23.622 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 9.6 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (9) Metis asteroid class: approx. diameter [km]: 170 approx. diameter ["]: 0.125 distance from Earth [AU]: 1.86410 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#134 date of fit: 2023 Aug 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): 0.004", 0.002", 82.35° remarks: * orbital elements for (9)Metis : Mean anomaly = 347.0559334997 deg Arg. of pericenter = 5.7469804221 deg Long. of node = 68.8685343036 deg Inclination = 5.5778778769 deg Eccentricity = 0.1231353862 Semimajor axis = 2.3866245708 AU Perihelion dist = 2.0927466326 AU Mag: H = 6.32, G = 0.17 Epoch of elements : MJD 60206.08729167 TDT (2023 Sep 19.0873) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1342023Aug24,8.74,2023,9,19,2.094067,0.057070,-0.518374,10.884001,1.198786,-0.005337,-0.000126,0.000000,0.000000 57.4974,22.2172,147.10,1.63,False TYC 1311-00099-1,5.75216439,22.2065616,0.00,9.58,0.00,0.0,0,,5.77584683,22.2172062,1.34,0.00,0,0,0 9,Metis,10.54,169.600,1.8641,0,0,3.698,5.65,,10.6,0 0,347.0326,2023,9,19,5.7470,68.8685,5.5779,0.12314,2.38662,2.09275,6.32,5.0,0.15 1.017,0.0040,0.0022,82,0.0046,Known errors,-1.00,0,-1,-1 20230919_0099-1,60182.99 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Aug 26, 23:46 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org