IOTA/IOTA-ES occultation update for (10422) 1999 AN22 / TYC 7415-01340-1 event on 2024 Nov 02, 00:39 UT Visible from Summary ------- On 2024 Nov 02 UT, the 21.294 km diameter asteroid (10422) 1999 AN22 will occult a 11.2 mag star in the constellation Sagittarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.24 mag to 17.39 mag (the magnitude of the asteroid) for at most 0.590 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: 85 * date and approx. time of event: 2024 Nov 02, 00:37 - 2024 Nov 02, 00:42 * geocentric midpoint of event [JD]: 2460616.52762383 * magnitude of target star: 11.15 * magnitude drop [mag]: 6.24 * estimated maximum duration [s]: 0.590 * Moon: 0 % sunlit, 53° distance * Sun: 59° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 25 * 1 sigma uncertainty interval [path widths]: +/- 0.60 * 1 sigma uncertainty interval [seconds]: +/- 1.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.019, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.020", 0.003", 104°) * approx speed of asteroid's shadow [km/s]: 35.8465 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 7415-01340-1 by 10422 1999 AN22 on 2024 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 116 0 0 -28 50 2 0 37 16.5 0 131 41 -28 59 15 .. .. .. -29 10 14 .. .. .. .... 117 0 0 -29 36 55 0 37 16.5 1 131 42 -29 46 10 -29 27 42 -29 57 12 -29 16 45 0.54 118 0 0 -30 23 52 0 37 16.7 2 130 43 -30 33 9 -30 14 37 -30 44 14 -30 3 37 0.59 119 0 0 -31 10 52 0 37 16.9 4 130 44 -31 20 10 -31 1 34 -31 31 17 -30 50 32 0.61 120 0 0 -31 57 51 0 37 17.2 5 129 44 -32 7 11 -31 48 31 -32 18 21 -31 37 27 0.62 121 0 0 -32 44 48 0 37 17.6 6 129 45 -32 54 10 -32 35 26 -33 5 22 -32 24 20 0.63 122 0 0 -33 31 40 0 37 18.1 7 128 46 -33 41 4 -33 22 17 -33 52 18 -33 11 8 0.63 123 0 0 -34 18 25 0 37 18.7 8 128 46 -34 27 51 -34 9 0 -34 39 7 -33 57 50 0.63 124 0 0 -35 5 1 0 37 19.3 9 127 47 -35 14 28 -34 55 35 -35 25 46 -34 44 23 0.64 125 0 0 -35 51 26 0 37 20.0 10 127 47 -36 0 55 -35 41 59 -36 12 14 -35 30 45 0.64 126 0 0 -36 37 37 0 37 20.8 12 126 48 -36 47 7 -36 28 9 -36 58 27 -36 16 53 0.64 127 0 0 -37 23 32 0 37 21.7 13 125 48 -37 33 3 -37 14 3 -37 44 25 -37 2 47 0.64 128 0 0 -38 9 10 0 37 22.6 14 125 49 -38 18 42 -37 59 40 -38 30 4 -37 48 22 0.64 129 0 0 -38 54 28 0 37 23.6 15 124 49 -39 4 0 -38 44 57 -39 15 24 -38 33 38 0.64 130 0 0 -39 39 23 0 37 24.7 16 123 50 -39 48 56 -39 29 52 -40 0 21 -39 18 33 0.64 131 0 0 -40 23 55 0 37 25.8 17 123 50 -40 33 29 -40 14 23 -40 44 53 -40 3 4 0.64 132 0 0 -41 8 1 0 37 26.9 18 122 50 -41 17 35 -40 58 29 -41 29 0 -40 47 10 0.64 133 0 0 -41 51 40 0 37 28.2 19 121 50 -42 1 13 -41 42 8 -42 12 38 -41 30 48 0.64 134 0 0 -42 34 49 0 37 29.5 20 120 51 -42 44 23 -42 25 17 -42 55 47 -42 13 58 0.64 135 0 0 -43 17 28 0 37 30.8 21 120 51 -43 27 1 -43 7 56 -43 38 25 -42 56 37 0.64 136 0 0 -43 59 34 0 37 32.2 22 119 51 -44 9 6 -43 50 2 -44 20 30 -43 38 44 0.64 137 0 0 -44 41 6 0 37 33.6 23 118 51 -44 50 38 -44 31 35 -45 2 1 -44 20 17 0.64 138 0 0 -45 22 3 0 37 35.0 24 117 51 -45 31 34 -45 12 33 -45 42 56 -45 1 16 0.64 139 0 0 -46 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19 48 -33 1 1 -33 31 2 -32 49 53 0.69 - 36 0 0 -32 23 22 0 42 10.2 13 236 -39 -32 32 45 -32 14 2 -32 43 56 -32 2 55 0.69 - 35 0 0 -31 36 17 0 42 11.2 12 236 -40 -31 45 38 -31 26 58 -31 56 47 -31 15 54 0.70 - 34 0 0 -30 49 11 0 42 12.0 11 235 -41 -30 58 29 -30 39 54 -31 9 36 -30 28 52 0.70 - 33 0 0 -30 2 5 0 42 12.8 10 235 -42 -30 11 21 -29 52 50 -30 22 25 -29 41 51 0.71 - 32 0 0 -29 15 2 0 42 13.6 9 234 -43 -29 24 16 -29 5 50 -29 35 18 -28 54 53 0.72 - 31 0 0 -28 28 5 0 42 14.2 8 234 -44 -28 37 17 -28 18 55 -28 48 15 -28 8 1 0.73 - 30 0 0 -27 41 16 0 42 14.7 7 233 -45 -27 50 25 -27 32 8 -28 1 20 -27 21 17 0.74 - 29 0 0 -26 54 35 0 42 15.2 5 233 -46 -27 3 42 -26 45 30 -27 14 35 -26 34 42 0.76 - 28 0 0 -26 8 7 0 42 15.6 4 232 -47 -26 17 11 -25 59 5 -26 28 1 -25 48 20 0.80 - 27 0 0 -25 21 53 0 42 15.8 3 232 -48 -25 30 54 -25 12 53 -25 41 40 -25 2 11 0.85 - 26 0 0 -24 35 54 0 42 16.0 2 231 -49 -24 44 53 -24 26 57 -24 55 36 -24 16 18 0.99 - 25 0 0 -23 50 13 0 42 16.1 1 231 -50 -23 59 9 -23 41 19 -24 9 49 -23 30 44 1.63 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 7415-01340-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 38 14.2301 DE: -35 33 34.080 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 38 14.2292 DE: -35 33 34.080 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.2 * B mag [mag]: 11.7 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (10422) 1999 AN22 asteroid class: approx. diameter [km]: 21 approx. diameter ["]: 0.011 distance from Earth [AU]: 2.66500 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#54 date of fit: 2023 Apr 25 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): 0.020", 0.003", 103.549° remarks: * orbital elements for (10422)1999 AN22 : Mean anomaly = 19.4596548260 deg Arg. of pericenter = 203.5827636423 deg Long. of node = 67.9837234216 deg Inclination = 17.8996494825 deg Eccentricity = 0.2072850305 Semimajor axis = 2.8554933284 AU Perihelion dist = 2.2635923068 AU Mag: H = 12.39, G = 0.15 Epoch of elements : MJD 60616.02762383 TDT (2024 Nov 02.0276) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#542023Apr25,0.59,2024,11,2,0.662972,0.035061,-0.536817,20.195403,1.229440,0.004849,-0.000299,-0.000001,0.000000 -131.7613,-35.5398,165.95,-14.84,False TYC 7415-01340-1,18.63728619,-35.5594668,11.74,11.15,10.83,0.0,0,,18.66469725,-35.5398304,6.24,6.11,0,0,0 10422,1999 AN22,17.39,21.294,2.6650,0,0,5.460,4.07,,1.8,0 0,19.2498,2024,11,1,203.5828,67.9837,17.8996,0.20729,2.85549,2.26359,12.39,5.0,0.15 1.596,0.0197,0.0033,104,0.0066,Known errors,0.98,0,-1,-1 20241102_1340-1,60140.67 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 16:11 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org