IOTA/IOTA-ES occultation update for (10422) 1999 AN22 / TYC 5619-01169-1 event on 2024 Jan 29, 02:22 UT Visible from Summary ------- On 2024 Jan 29 UT, the 21.251 km diameter asteroid (10422) 1999 AN22 will occult a 12.0 mag star in the constellation Libra for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.53 mag to 17.49 mag (the magnitude of the asteroid) for at most 0.700 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: 94 * date and approx. time of event: 2024 Jan 29, 02:19 - 2024 Jan 29, 02:26 * geocentric midpoint of event [JD]: 2460338.59929266 * magnitude of target star: 11.97 * magnitude drop [mag]: 5.53 * estimated maximum duration [s]: 0.700 * Moon: 90 % sunlit, 75° distance * Sun: 69° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 22 * 1 sigma uncertainty interval [path widths]: +/- 0.45 * 1 sigma uncertainty interval [seconds]: +/- 1.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.016, +/- 0.010) * 1 sigma uncertainty ellipse (major, minor, PA): (0.019", 0.002", 121°) * approx speed of asteroid's shadow [km/s]: 30.2676 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5619-01169-1 by 10422 1999 AN22 on 2024 Jan 29 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 - 6 0 0 27 39 42 2 19 33.2 0 104 -65 27 33 39 27 45 46 27 28 13 27 51 12 .... - 5 0 0 27 26 46 2 19 33.2 1 104 -64 27 20 42 27 32 49 27 15 15 27 38 16 -0.07 - 4 0 0 27 13 32 2 19 33.3 2 104 -63 27 7 28 27 19 36 27 2 1 27 25 3 -0.13 - 3 0 0 27 0 1 2 19 33.5 3 105 -62 26 53 56 27 6 5 26 48 29 27 11 33 -0.15 - 2 0 0 26 46 13 2 19 33.7 4 105 -61 26 40 8 26 52 18 26 34 40 26 57 46 -0.17 - 1 0 0 26 32 8 2 19 34.0 5 106 -60 26 26 3 26 38 13 26 20 34 26 43 42 -0.18 - 0 0 0 26 17 46 2 19 34.3 6 106 -60 26 11 41 26 23 52 26 6 12 26 29 21 -0.18 1 0 0 26 3 8 2 19 34.7 7 107 -59 25 57 2 26 9 14 25 51 33 26 14 43 -0.18 2 0 0 25 48 13 2 19 35.1 8 107 -58 25 42 7 25 54 20 25 36 38 25 59 50 -0.19 3 0 0 25 33 2 2 19 35.7 9 108 -57 25 26 55 25 39 9 25 21 26 25 44 39 -0.19 4 0 0 25 17 35 2 19 36.2 10 108 -56 25 11 28 25 23 43 25 5 58 25 29 13 -0.19 5 0 0 25 1 52 2 19 36.8 11 108 -55 24 55 44 25 8 0 24 50 14 25 13 31 -0.19 6 0 0 24 45 53 2 19 37.5 12 109 -54 24 39 45 24 52 2 24 34 14 24 57 33 -0.20 7 0 0 24 29 39 2 19 38.3 13 109 -53 24 23 30 24 35 48 24 17 59 24 41 19 -0.20 8 0 0 24 13 9 2 19 39.1 13 110 -53 24 7 0 24 19 18 24 1 29 24 24 50 -0.20 9 0 0 23 56 24 2 19 39.9 14 110 -52 23 50 15 24 2 34 23 44 43 24 8 6 -0.20 10 0 0 23 39 24 2 19 40.9 15 111 -51 23 33 15 23 45 34 23 27 42 23 51 7 -0.20 11 0 0 23 22 10 2 19 41.9 16 111 -50 23 16 0 23 28 20 23 10 27 23 33 53 -0.20 12 0 0 23 4 41 2 19 42.9 17 111 -49 22 58 30 23 10 51 22 52 57 23 16 25 -0.20 13 0 0 22 46 57 2 19 44.0 18 112 -48 22 40 46 22 53 8 22 35 13 22 58 42 -0.20 14 0 0 22 29 0 2 19 45.2 19 112 -47 22 22 49 22 35 12 22 17 15 22 40 46 -0.20 15 0 0 22 10 49 2 19 46.4 20 113 -46 22 4 37 22 17 1 21 59 3 22 22 35 -0.20 16 0 0 21 52 25 2 19 47.7 21 113 -45 21 46 12 21 58 37 21 40 38 22 4 12 -0.20 17 0 0 21 33 47 2 19 49.1 22 113 -44 21 27 35 21 40 0 21 22 0 21 45 35 -0.20 18 0 0 21 14 57 2 19 50.5 23 114 -43 21 8 44 21 21 10 21 3 9 21 26 45 -0.20 19 0 0 20 55 54 2 19 52.0 24 114 -42 20 49 41 21 2 7 20 44 5 21 7 43 -0.20 20 0 0 20 36 39 2 19 53.6 25 115 -41 20 30 25 20 42 53 20 24 50 20 48 28 -0.20 21 0 0 20 17 12 2 19 55.2 26 115 -40 20 10 58 20 23 26 20 5 22 20 29 2 -0.20 22 0 0 19 57 34 2 19 56.9 27 115 -39 19 51 20 20 3 48 19 45 43 20 9 24 -0.21 23 0 0 19 37 44 2 19 58.7 28 116 -38 19 31 30 19 43 59 19 25 53 19 49 36 -0.21 24 0 0 19 17 44 2 20 0.5 29 116 -37 19 11 29 19 23 59 19 5 53 19 29 36 -0.21 25 0 0 18 57 33 2 20 2.3 30 117 -36 18 51 18 19 3 48 18 45 41 19 9 26 -0.21 26 0 0 18 37 13 2 20 4.3 31 117 -35 18 30 57 18 43 28 18 25 20 18 49 6 -0.21 27 0 0 18 16 43 2 20 6.3 32 117 -34 18 10 27 18 22 58 18 4 50 18 28 36 -0.21 28 0 0 17 56 3 2 20 8.4 33 118 -33 17 49 47 18 2 19 17 44 10 18 7 57 -0.21 29 0 0 17 35 15 2 20 10.5 34 118 -32 17 28 59 17 41 31 17 23 21 17 47 9 -0.21 30 0 0 17 14 19 2 20 12.7 35 119 -31 17 8 2 17 20 35 17 2 24 17 26 13 -0.21 31 0 0 16 53 14 2 20 14.9 36 119 -30 16 46 58 16 59 31 16 41 20 17 5 9 -0.21 32 0 0 16 32 2 2 20 17.2 37 119 -29 16 25 46 16 38 19 16 20 8 16 43 58 -0.21 33 0 0 16 10 44 2 20 19.6 38 120 -28 16 4 27 16 17 0 15 58 48 16 22 39 -0.21 34 0 0 15 49 18 2 20 22.0 39 120 -27 15 43 1 15 55 35 15 37 23 16 1 14 -0.21 35 0 0 15 27 47 2 20 24.5 40 121 -26 15 21 30 15 34 4 15 15 51 15 39 43 -0.21 36 0 0 15 6 10 2 20 27.1 41 121 -25 14 59 53 15 12 27 14 54 14 15 18 7 -0.21 37 0 0 14 44 28 2 20 29.7 42 122 -24 14 38 11 14 50 46 14 32 32 14 56 25 -0.21 38 0 0 14 22 42 2 20 32.4 43 122 -23 14 16 24 14 28 59 14 10 45 14 34 39 -0.21 39 0 0 14 0 51 2 20 35.1 44 122 -22 13 54 34 14 7 9 13 48 55 14 12 48 -0.21 40 0 0 13 38 57 2 20 37.9 45 123 -21 13 32 40 13 45 15 13 27 0 13 50 54 -0.21 41 0 0 13 17 0 2 20 40.7 46 123 -20 13 10 42 13 23 17 13 5 3 13 28 57 -0.21 42 0 0 12 55 0 2 20 43.6 47 124 -19 12 48 43 13 1 18 12 43 3 13 6 57 -0.21 43 0 0 12 32 58 2 20 46.5 48 124 -18 12 26 41 12 39 16 12 21 2 12 44 56 -0.21 44 0 0 12 10 55 2 20 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37 - 6 24 51 - 6 2 16 -0.22 110 0 0 - 6 21 10 2 24 48.1 56 258 52 - 6 27 6 - 6 15 13 - 6 32 27 - 6 9 52 -0.22 111 0 0 - 6 28 24 2 24 51.2 55 259 53 - 6 34 20 - 6 22 28 - 6 39 41 - 6 17 7 -0.22 112 0 0 - 6 35 17 2 24 54.3 54 259 54 - 6 41 13 - 6 29 21 - 6 46 33 - 6 24 0 -0.22 113 0 0 - 6 41 48 2 24 57.4 53 259 55 - 6 47 44 - 6 35 52 - 6 53 4 - 6 30 32 -0.22 114 0 0 - 6 47 57 2 25 0.4 52 259 56 - 6 53 53 - 6 42 2 - 6 59 12 - 6 36 42 -0.22 115 0 0 - 6 53 45 2 25 3.4 51 260 57 - 6 59 40 - 6 47 49 - 7 5 0 - 6 42 30 -0.22 116 0 0 - 6 59 10 2 25 6.3 50 260 58 - 7 5 6 - 6 53 15 - 7 10 25 - 6 47 55 -0.22 117 0 0 - 7 4 14 2 25 9.2 49 260 59 - 7 10 9 - 6 58 19 - 7 15 28 - 6 52 59 -0.22 118 0 0 - 7 8 56 2 25 12.1 48 260 60 - 7 14 50 - 7 3 1 - 7 20 9 - 6 57 41 -0.22 119 0 0 - 7 13 15 2 25 14.9 47 260 61 - 7 19 10 - 7 7 20 - 7 24 28 - 7 2 1 -0.22 120 0 0 - 7 17 13 2 25 17.6 46 260 62 - 7 23 7 - 7 11 18 - 7 28 26 - 7 5 59 -0.22 121 0 0 - 7 20 48 2 25 20.3 45 261 63 - 7 26 42 - 7 14 54 - 7 32 1 - 7 9 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1 2 26 11.2 21 260 79 - 6 56 56 - 6 45 5 - 7 2 15 - 6 39 45 -0.22 147 0 0 - 6 45 5 2 26 12.5 20 260 79 - 6 51 1 - 6 39 10 - 6 56 20 - 6 33 50 -0.22 148 0 0 - 6 38 48 2 26 13.7 19 260 78 - 6 44 44 - 6 32 53 - 6 50 4 - 6 27 33 -0.22 149 0 0 - 6 32 10 2 26 14.9 18 260 78 - 6 38 6 - 6 26 14 - 6 43 26 - 6 20 54 -0.22 150 0 0 - 6 25 11 2 26 16.0 17 260 78 - 6 31 8 - 6 19 15 - 6 36 28 - 6 13 55 -0.22 151 0 0 - 6 17 51 2 26 17.0 16 259 77 - 6 23 48 - 6 11 55 - 6 29 8 - 6 6 34 -0.22 152 0 0 - 6 10 10 2 26 18.0 15 259 77 - 6 16 6 - 6 4 13 - 6 21 27 - 5 58 52 -0.22 153 0 0 - 6 2 8 2 26 18.9 14 259 76 - 6 8 5 - 5 56 11 - 6 13 25 - 5 50 49 -0.22 154 0 0 - 5 53 45 2 26 19.8 13 259 76 - 5 59 42 - 5 47 47 - 6 5 3 - 5 42 26 -0.22 155 0 0 - 5 45 1 2 26 20.6 11 259 75 - 5 50 59 - 5 39 4 - 5 56 20 - 5 33 42 -0.22 156 0 0 - 5 35 57 2 26 21.3 10 259 74 - 5 41 55 - 5 29 59 - 5 47 16 - 5 24 37 -0.22 157 0 0 - 5 26 33 2 26 21.9 9 259 74 - 5 32 31 - 5 20 34 - 5 37 52 - 5 15 12 -0.22 158 0 0 - 5 16 48 2 26 22.5 8 259 73 - 5 22 46 - 5 10 49 - 5 28 8 - 5 5 27 -0.22 159 0 0 - 5 6 43 2 26 23.1 7 259 72 - 5 12 41 - 5 0 44 - 5 18 4 - 4 55 21 -0.22 160 0 0 - 4 56 18 2 26 23.5 6 259 71 - 5 2 17 - 4 50 18 - 5 7 39 - 4 44 55 -0.22 161 0 0 - 4 45 33 2 26 23.9 5 259 71 - 4 51 32 - 4 39 33 - 4 56 55 - 4 34 10 -0.22 162 0 0 - 4 34 28 2 26 24.3 4 258 70 - 4 40 28 - 4 28 28 - 4 45 51 - 4 23 5 -0.22 163 0 0 - 4 23 4 2 26 24.5 3 258 69 - 4 29 4 - 4 17 4 - 4 34 27 - 4 11 40 -0.23 164 0 0 - 4 11 20 2 26 24.7 2 258 68 - 4 17 21 - 4 5 20 - 4 22 45 - 3 59 55 -0.23 165 0 0 - 3 59 17 2 26 24.8 1 258 67 - 4 5 18 - 3 53 17 - 4 10 42 - 3 47 52 -0.24 166 0 0 - 3 46 56 2 26 24.9 0 258 66 - 3 52 57 - 3 40 54 - 3 58 21 - 3 35 29 -0.31 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 12.0 Data for the target star ------------------------ * name: TYC 5619-01169-1 * constellation : Libra * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 15 58 45.8817 DE: -11 44 17.261 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 15 58 45.8820 DE: -11 44 17.262 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 12.0 * B mag [mag]: 12.4 * 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]: 2.62480 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): 0.019", 0.002", 120.751° remarks: * orbital elements for (10422)1999 AN22 : Mean anomaly = 322.6819704772 deg Arg. of pericenter = 203.6096955474 deg Long. of node = 67.9840017001 deg Inclination = 17.8993383175 deg Eccentricity = 0.2074269052 Semimajor axis = 2.8559326021 AU Perihelion dist = 2.2635353411 AU Mag: H = 12.39, G = 0.15 Epoch of elements : MJD 60338.09929266 TDT (2024 Jan 29.0993) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#542023Apr25,0.70,2024,1,29,2.383024,0.058111,0.203808,16.421911,-4.709470,-0.005191,0.001393,-0.000001,0.000000 76.4272,-11.8076,147.49,-18.10,False TYC 5619-01169-1,15.97941156,-11.7381280,12.43,11.97,11.72,0.0,0,,16.00133859,-11.8076133,5.53,5.33,0,0,0 10422,1999 AN22,17.49,21.251,2.6248,0,0,3.748,-15.78,,1.8,0 0,322.6617,2024,1,29,203.6097,67.9840,17.8993,0.20743,2.85593,2.26354,12.39,5.0,0.15 1.449,0.0187,0.0017,121,0.0050,Known errors,1.11,0,-1,-1 20240129_1169-1,60137.03 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 12, 00:50 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org