IOTA/IOTA-ES occultation update for (92) Undina / TYC 1369-00709-1 event on 2023 Nov 02, 17:29 UT Visible from Australia Summary ------- On 2023 Nov 02 UT, the 120.8 km diameter asteroid (92) Undina will occult a 10.5 mag star in the constellation Gemini for observers along a path across Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.29 mag to 12.64 mag (the magnitude of the asteroid) for at most 18.590 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 Nov 02, 17:16 - 2023 Nov 02, 17:41 * geocentric midpoint of event [JD]: 2460251.22870600 * magnitude of target star: 10.49 * magnitude drop [mag]: 2.29 * estimated maximum duration [s]: 18.590 * Moon: 74 % sunlit, 14° distance * Sun: 106° distance * rough path description: Australia The occultation path -------------------- * approximate projected width [km]: 165 * 1 sigma uncertainty interval [path widths]: +/- 0.05 * 1 sigma uncertainty interval [seconds]: +/- 3.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.010, +/- 0.001) * 1 sigma uncertainty ellipse (major, minor, PA): (0.010", 0.001", 91°) * approx speed of asteroid's shadow [km/s]: 6.4964 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1369-00709-1 by 92 Undina on 2023 Nov 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 0 0 0 .. .. .... .. .. .. .. .. .. .. .. .. -49 13 49 .. .. .. -49 9 9 .... 112 0 0 -49 40 40 17 17 25.3 1 57 -24 -50 33 29 -48 48 43 -50 38 20 -48 44 3 .... 113 0 0 -49 15 19 17 17 25.6 1 56 -24 -50 8 10 -48 23 20 -50 13 1 -48 18 40 0.49 114 0 0 -48 49 41 17 17 26.2 2 55 -25 -49 42 34 -47 57 42 -49 47 25 -47 53 1 0.64 115 0 0 -48 23 48 17 17 27.0 3 54 -25 -49 16 42 -47 31 48 -49 21 33 -47 27 7 0.71 116 0 0 -47 57 40 17 17 28.0 4 54 -25 -48 50 35 -47 5 39 -48 55 25 -47 0 58 0.75 117 0 0 -47 31 17 17 17 29.4 5 53 -25 -48 24 12 -46 39 15 -48 29 3 -46 34 34 0.77 118 0 0 -47 4 40 17 17 31.0 5 52 -25 -47 57 35 -46 12 38 -48 2 25 -46 7 57 0.79 119 0 0 -46 37 49 17 17 32.9 6 51 -25 -47 30 44 -45 45 47 -47 35 34 -45 41 7 0.81 120 0 0 -46 10 46 17 17 35.1 7 51 -26 -47 3 39 -45 18 44 -47 8 30 -45 14 4 0.82 121 0 0 -45 43 30 17 17 37.6 8 50 -26 -46 36 23 -44 51 30 -46 41 13 -44 46 49 0.82 122 0 0 -45 16 3 17 17 40.5 9 49 -26 -46 8 54 -44 24 4 -46 13 45 -44 19 24 0.83 123 0 0 -44 48 25 17 17 43.6 10 48 -26 -45 41 15 -43 56 28 -45 46 5 -43 51 48 0.84 124 0 0 -44 20 37 17 17 47.0 10 48 -26 -45 13 25 -43 28 42 -45 18 15 -43 24 2 0.84 125 0 0 -43 52 41 17 17 50.8 11 47 -26 -44 45 26 -43 0 48 -44 50 15 -42 56 8 0.85 126 0 0 -43 24 36 17 17 54.9 12 46 -26 -44 17 18 -42 32 45 -44 22 7 -42 28 6 0.85 127 0 0 -42 56 23 17 17 59.4 13 46 -26 -43 49 2 -42 4 36 -43 53 51 -41 59 57 0.85 128 0 0 -42 28 4 17 18 4.2 14 45 -26 -43 20 40 -41 36 20 -43 25 29 -41 31 41 0.86 129 0 0 -41 59 40 17 18 9.3 15 44 -26 -42 52 11 -41 7 59 -42 57 0 -41 3 21 0.86 130 0 0 -41 31 10 17 18 14.7 16 43 -26 -42 23 38 -40 39 34 -42 28 26 -40 34 55 0.86 131 0 0 -41 2 37 17 18 20.6 16 43 -26 -41 55 0 -40 11 5 -41 59 48 -40 6 27 0.86 132 0 0 -40 34 1 17 18 26.7 17 42 -26 -41 26 19 -39 42 33 -41 31 6 -39 37 55 0.87 133 0 0 -40 5 23 17 18 33.3 18 41 -25 -40 57 36 -39 14 0 -41 2 23 -39 9 23 0.87 134 0 0 -39 36 44 17 18 40.2 19 40 -25 -40 28 52 -38 45 26 -40 33 38 -38 40 49 0.87 135 0 0 -39 8 5 17 18 47.4 20 40 -25 -40 0 7 -38 16 52 -40 4 53 -38 12 16 0.87 136 0 0 -38 39 27 17 18 55.0 21 39 -25 -39 31 24 -37 48 20 -39 36 9 -37 43 44 0.87 137 0 0 -38 10 51 17 19 3.0 22 38 -25 -39 2 42 -37 19 50 -39 7 26 -37 15 15 0.87 138 0 0 -37 42 19 17 19 11.3 23 37 -24 -38 34 3 -36 51 23 -38 38 46 -36 46 48 0.88 139 0 0 -37 13 50 17 19 20.0 23 36 -24 -38 5 27 -36 23 1 -38 10 11 -36 18 27 0.88 140 0 0 -36 45 26 17 19 29.0 24 36 -24 -37 36 57 -35 54 44 -37 41 40 -35 50 10 0.88 141 0 0 -36 17 9 17 19 38.4 25 35 -24 -37 8 33 -35 26 33 -37 13 15 -35 22 0 0.88 142 0 0 -35 48 59 17 19 48.1 26 34 -23 -36 40 15 -34 58 30 -36 44 57 -34 53 58 0.88 143 0 0 -35 20 58 17 19 58.2 27 33 -23 -36 12 6 -34 30 36 -36 16 47 -34 26 4 0.88 144 0 0 -34 53 5 17 20 8.6 28 32 -23 -35 44 6 -34 2 50 -35 48 46 -33 58 19 0.89 145 0 0 -34 25 23 17 20 19.4 29 32 -22 -35 16 16 -33 35 16 -35 20 56 -33 30 45 0.89 146 0 0 -33 57 52 17 20 30.5 29 31 -22 -34 48 38 -33 7 53 -34 53 16 -33 3 23 0.89 147 0 0 -33 30 34 17 20 42.0 30 30 -21 -34 21 11 -32 40 42 -34 25 49 -32 36 13 0.89 148 0 0 -33 3 29 17 20 53.8 31 29 -21 -33 53 58 -32 13 45 -33 58 35 -32 9 16 0.89 149 0 0 -32 36 38 17 21 5.9 32 28 -20 -33 26 59 -31 47 2 -33 31 36 -31 42 34 0.89 150 0 0 -32 10 3 17 21 18.3 33 27 -20 -33 0 16 -31 20 35 -33 4 51 -31 16 8 0.89 151 0 0 -31 43 44 17 21 31.0 33 26 -19 -32 33 48 -30 54 24 -32 38 23 -30 49 58 0.90 152 0 0 -31 17 43 17 21 44.0 34 25 -19 -32 7 38 -30 28 31 -32 12 12 -30 24 5 0.90 153 0 0 -30 51 59 17 21 57.4 35 24 -18 -31 41 46 -30 2 55 -31 46 19 -29 58 31 0.90 154 0 0 -30 26 35 17 22 11.0 36 23 -18 -31 16 14 -29 37 40 -31 20 46 -29 33 15 0.90 155 0 0 -30 1 31 17 22 24.9 37 22 -17 -30 51 1 -29 12 44 -30 55 32 -29 8 20 0.90 156 0 0 -29 36 48 17 22 39.0 37 21 -17 -30 26 9 -28 48 9 -30 30 39 -28 43 46 0.90 157 0 0 -29 12 26 17 22 53.4 38 20 -16 -30 1 39 -28 23 56 -30 6 8 -28 19 34 0.90 158 0 0 -28 48 27 17 23 8.1 39 19 -15 -29 37 31 -28 0 5 -29 42 0 -27 55 44 0.91 159 0 0 -28 24 52 17 23 23.0 39 18 -15 -29 13 47 -27 36 38 -29 18 15 -27 32 17 0.91 160 0 0 -28 1 40 17 23 38.1 40 17 -14 -28 50 27 -27 13 35 -28 54 54 -27 9 15 0.91 161 0 0 -27 38 54 17 23 53.5 41 15 -13 -28 27 32 -26 50 57 -28 31 59 -26 46 38 0.91 162 0 0 -27 16 34 17 24 9.1 41 14 -13 -28 5 3 -26 28 44 -28 9 29 -26 24 26 0.91 163 0 0 -26 54 40 17 24 24.8 42 13 -12 -27 43 0 -26 6 58 -27 47 25 -26 2 41 0.91 164 0 0 -26 33 13 17 24 40.8 42 12 -11 -27 21 25 -25 45 40 -27 25 49 -25 41 23 0.91 165 0 0 -26 12 14 17 24 56.9 43 10 -10 -27 0 18 -25 24 48 -27 4 41 -25 20 32 0.92 166 0 0 -25 51 43 17 25 13.2 43 9 -10 -26 39 39 -25 4 26 -26 44 1 -25 0 10 0.92 167 0 0 -25 31 41 17 25 29.7 44 8 -9 -26 19 29 -24 44 32 -26 23 51 -24 40 17 0.92 168 0 0 -25 12 9 17 25 46.3 44 6 -8 -25 59 49 -24 25 7 -26 4 10 -24 20 53 0.92 169 0 0 -24 53 7 17 26 3.0 45 5 -7 -25 40 39 -24 6 13 -25 45 0 -24 2 0 0.92 170 0 0 -24 34 37 17 26 19.9 45 4 -6 -25 22 1 -23 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17 41 15.6 4 295 61 -28 45 55 -27 10 38 -28 50 18 -27 6 23 0.97 -116 0 0 -28 19 48 17 41 16.8 3 295 62 -29 7 54 -27 32 23 -29 12 17 -27 28 7 0.99 -115 0 0 -28 42 1 17 41 17.7 2 295 63 -29 30 13 -27 54 28 -29 34 38 -27 50 11 1.04 -114 0 0 -29 4 33 17 41 18.2 1 294 63 -29 52 54 -28 16 53 -29 57 19 -28 12 36 1.17 0 0 0 .. .. .... .. .. .. .. .. .. .. .. .. -28 39 38 .. .. .. -28 35 20 .... Uncertainty in time = +/- 3 secs Prediction of 2023 Oct 15.9 Data for the target star ------------------------ * name: TYC 1369-00709-1 * constellation : Gemini * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 07 42 57.7489 DE: +20 29 56.202 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 07 42 57.7491 DE: +20 29 56.201 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.5 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (92) Undina asteroid class: approx. diameter [km]: 121 approx. diameter ["]: 0.057 distance from Earth [AU]: 2.90890 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#120 date of fit: 2023 Oct 09 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): 0.010", 0.001", 90.912° remarks: * orbital elements for (92)Undina : Mean anomaly = 107.8378482652 deg Arg. of pericenter = 237.0078004603 deg Long. of node = 101.3953246574 deg Inclination = 9.9230413085 deg Eccentricity = 0.1052709247 Semimajor axis = 3.1847730028 AU Perihelion dist = 2.8495090039 AU Mag: H = 6.81, G = 0.15 Epoch of elements : MJD 60250.72881944 TDT (2023 Nov 02.7288) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1202023Oct09,18.59,2023,11,2,17.488944,0.135838,-0.668011,3.592502,0.734199,-0.005634,0.001021,0.000000,0.000000 172.0262,20.4432,-86.44,-14.82,False TYC 1369-00709-1,7.71604134,20.4989450,0.00,10.49,0.00,0.0,0,,7.73935386,20.4432155,2.29,0.00,0,0,0 92,Undina,12.64,120.800,2.9089,0,0,0.773,2.22,,6.2,0 0,107.7115,2023,11,2,237.0078,101.3953,9.9230,0.10527,3.18477,2.84951,6.82,5.0,0.15 1.045,0.0100,0.0015,91,0.0101,Known errors,-1.00,0,-1,-1 20231102_0709-1,60232.88 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Oct 15, 21:00 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org