IOTA/IOTA-ES occultation update for (53) Kalypso / UCAC4 515-049953 event on 2023 Jan 12, 11:28 UT Visible from USA, Canada Summary ------- On 2023 Jan 12 UT, the 105.7 km diameter asteroid (53) Kalypso will occult a 12.3 mag star in the constellation Cancer for observers along a path across USA, Canada. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.47 mag to 11.67 mag (the magnitude of the asteroid) for at most 17.320 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 Jan 12, 11:17 - 2023 Jan 12, 11:38 * geocentric midpoint of event [JD]: 2459956.97782979 * magnitude of target star: 12.34 * magnitude drop [mag]: 0.47 * estimated maximum duration [s]: 17.320 * Moon: 75 % sunlit, 34° distance * Sun: 154° distance * rough path description: USA, Canada The occultation path -------------------- * approximate projected width [km]: 180 * 1 sigma uncertainty interval [path widths]: +/- 0.08 * 1 sigma uncertainty interval [seconds]: +/- 3.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.025, +/- 0.007) * 1 sigma uncertainty ellipse (major, minor, PA): (0.026", 0.004", 103°) * approx speed of asteroid's shadow [km/s]: 6.1017 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 515-049953 by 53 Kalypso on 2023 Jan 12 Centre Star Star Sun Path Limit1 Path Limit2 Error Limit1 Error Limit2 Alt E. Longitude Latitude U.T. Alt Az Alt Crn o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " o ' " o ' " o ' " o ' " Longitude Latitude Longitude Latitude Longitude Latitude Longitude Latitude .. .. .. .. .. .. .. .. .... .. .. .. - 50 24 1 21 47 9 ... .. .. .. .. .. - 51 15 16 21 54 42 ... .. .. .. .. .. .... .. .. .. .. .. .. .. .. .... .. .. .. - 52 43 39 22 30 9 ... .. .. .. .. .. - 53 18 27 22 33 55 ... .. .. .. .. .. .... - 50 14 7 22 34 12 11 17 54.8 4 282 15 - 54 24 6 23 4 8 ... .. .. .. .. .. - 54 52 25 23 6 24 ... .. .. .. .. .. .... - 52 32 53 23 17 5 11 18 0.7 6 281 12 - 55 46 49 23 34 3 ... .. .. .. .. .. - 56 11 27 23 35 27 ... .. .. .. .. .. -1.12 - 54 12 46 23 51 1 11 18 6.7 8 281 11 - 56 58 51 24 1 29 - 49 52 47 23 18 56 - 57 21 2 24 2 18 - 48 39 13 23 6 18 -1.22 - 55 35 2 24 20 54 11 18 12.6 9 280 10 - 58 3 30 24 27 13 - 52 14 50 24 2 39 - 58 23 54 24 27 37 - 51 33 53 23 57 32 -1.26 - 56 46 41 24 48 20 11 18 18.5 10 280 8 - 59 2 40 24 51 42 - 53 55 36 24 36 53 - 59 21 43 24 51 46 - 53 23 40 24 33 51 -1.28 - 57 50 59 25 14 4 11 18 24.4 11 279 7 - 59 57 34 25 15 11 - 55 18 14 25 6 56 - 60 15 33 25 14 59 - 54 50 58 25 4 59 -1.29 - 58 49 51 25 38 33 11 18 30.3 12 279 6 - 60 49 1 25 37 51 - 56 30 0 25 34 29 - 61 6 7 25 37 27 - 56 5 43 25 33 14 -1.30 - 59 44 28 26 2 3 11 18 36.3 13 278 5 - 61 37 37 25 59 53 - 57 34 20 26 0 18 - 61 53 57 25 59 17 - 57 12 8 25 59 33 -1.31 - 60 35 38 26 24 45 11 18 42.2 14 278 5 - 62 23 46 26 21 20 - 58 33 9 26 24 52 - 62 39 29 26 20 35 - 58 12 32 26 24 29 -1.31 - 61 23 58 26 46 48 11 18 48.1 14 277 4 - 63 7 51 26 42 19 - 59 27 41 26 48 26 - 63 23 1 26 41 25 - 59 8 18 26 48 21 -1.31 - 62 9 53 27 8 17 11 18 54.0 15 277 3 - 63 50 6 27 2 52 - 60 18 46 27 11 12 - 64 4 48 27 1 51 - 60 0 23 27 11 22 -1.32 - 62 53 43 27 29 18 11 19 0.0 16 277 2 - 64 30 45 27 23 4 - 61 6 59 27 33 19 - 64 45 2 27 21 56 - 60 49 26 27 33 41 -1.32 - 63 35 45 27 49 53 11 19 5.9 16 276 2 - 65 9 58 27 42 55 - 61 52 47 27 54 52 - 65 23 53 27 41 42 - 61 35 55 27 55 25 -1.32 - 64 16 10 28 10 7 11 19 11.8 17 276 1 - 65 47 55 28 2 29 - 62 36 29 28 15 56 - 66 1 29 28 1 10 - 62 20 14 28 16 38 -1.32 - 64 55 11 28 30 1 11 19 17.7 17 275 0 - 66 24 41 28 21 47 - 63 18 22 28 36 35 - 66 37 58 28 20 23 - 63 2 38 28 37 26 -1.32 - 65 32 54 28 49 37 11 19 23.7 18 275 0 - 67 0 25 28 40 51 - 63 58 39 28 56 53 - 67 13 25 28 39 22 - 63 43 23 28 57 50 -1.32 - 66 9 29 29 8 58 11 19 29.6 19 275 -1 - 67 35 10 28 59 41 - 64 37 30 29 16 50 - 67 47 56 28 58 9 - 64 22 39 29 17 55 -1.33 - 66 45 0 29 28 4 11 19 35.5 19 274 -1 - 68 9 3 29 18 20 - 65 15 5 29 36 31 - 68 21 35 29 16 43 - 65 0 35 29 37 41 -1.33 - 67 19 34 29 46 58 11 19 41.4 20 274 -2 - 68 42 7 29 36 47 - 65 51 30 29 55 55 - 68 54 26 29 35 7 - 65 37 20 29 57 11 -1.33 - 67 53 15 30 5 39 11 19 47.4 20 274 -3 - 69 14 25 29 55 4 - 66 26 52 30 15 5 - 69 26 33 29 53 21 - 66 13 0 30 16 26 -1.33 - 68 26 7 30 24 10 11 19 53.3 21 273 -3 - 69 46 1 30 13 12 - 67 1 17 30 34 3 - 69 57 59 30 11 25 - 66 47 40 30 35 28 -1.33 - 68 58 14 30 42 30 11 19 59.2 21 273 -4 - 70 16 58 30 31 11 - 67 34 48 30 52 48 - 70 28 46 30 29 21 - 67 21 26 30 54 18 -1.33 - 69 29 39 31 0 42 11 20 5.1 21 272 -4 - 70 47 19 30 49 2 - 68 7 31 31 11 23 - 70 58 57 30 47 9 - 67 54 23 31 12 56 -1.33 - 70 0 25 31 18 44 11 20 11.1 22 272 -5 - 71 17 5 31 6 45 - 68 39 28 31 29 48 - 71 28 35 31 4 50 - 68 26 32 31 31 25 -1.33 - 70 30 34 31 36 39 11 20 17.0 22 272 -5 - 71 46 19 31 24 22 - 69 10 44 31 48 3 - 71 57 41 31 22 24 - 68 57 59 31 49 43 -1.33 - 71 0 10 31 54 26 11 20 22.9 23 271 -6 - 72 15 2 31 41 52 - 69 41 21 32 6 10 - 72 26 17 31 39 51 - 69 28 46 32 7 54 -1.33 - 71 29 13 32 12 6 11 20 28.8 23 271 -6 - 72 43 17 31 59 15 - 70 11 20 32 24 9 - 72 54 26 31 57 12 - 69 58 56 32 25 56 -1.33 - 71 57 46 32 29 40 11 20 34.8 23 271 -7 - 73 11 5 32 16 33 - 70 40 46 32 42 0 - 73 22 7 32 14 28 - 70 28 31 32 43 50 -1.33 - 72 25 50 32 47 8 11 20 40.7 24 270 -7 - 73 38 28 32 33 45 - 71 9 40 32 59 45 - 73 49 23 32 31 38 - 70 57 33 33 1 38 -1.33 - 72 53 28 33 4 30 11 20 46.6 24 270 -7 - 74 5 26 32 50 53 - 71 38 3 33 17 23 - 74 16 16 32 48 43 - 71 26 4 33 19 19 -1.33 - 73 20 40 33 21 46 11 20 52.5 25 270 -8 - 74 32 1 33 7 55 - 72 5 58 33 34 56 - 74 42 46 33 5 43 - 71 54 5 33 36 53 -1.34 - 73 47 27 33 38 58 11 20 58.5 25 269 -8 - 74 58 14 33 24 53 - 72 33 25 33 52 22 - 75 8 54 33 22 39 - 72 21 40 33 54 23 -1.34 - 74 13 52 33 56 5 11 21 4.4 25 269 -9 - 75 24 6 33 41 47 - 73 0 27 34 9 44 - 75 34 42 33 39 31 - 72 48 48 34 11 46 -1.34 - 74 39 55 34 13 7 11 21 10.3 26 268 -9 - 75 49 39 33 58 37 - 73 27 5 34 27 0 - 76 0 10 33 56 19 - 73 15 32 34 29 5 -1.34 - 75 5 37 34 30 6 11 21 16.2 26 268 -10 - 76 14 53 34 15 23 - 73 53 20 34 44 12 - 76 25 20 34 13 3 - 73 41 53 34 46 19 -1.34 - 75 31 0 34 47 0 11 21 22.2 26 268 -10 - 76 39 48 34 32 5 - 74 19 13 35 1 19 - 76 50 11 34 29 44 - 74 7 51 35 3 29 -1.34 - 75 56 3 35 3 51 11 21 28.1 27 267 -10 - 77 4 26 34 48 44 - 74 44 46 35 18 23 - 77 14 46 34 46 21 - 74 33 28 35 20 34 -1.34 - 76 20 48 35 20 38 11 21 34.0 27 267 -11 - 77 28 48 35 5 20 - 75 9 58 35 35 23 - 77 39 4 35 2 56 - 74 58 45 35 37 36 -1.34 - 76 45 16 35 37 22 11 21 39.9 27 267 -11 - 77 52 54 35 21 53 - 75 34 51 35 52 19 - 78 3 7 35 19 27 - 75 23 42 35 54 34 -1.34 - 77 9 28 35 54 3 11 21 45.9 27 266 -11 - 78 16 44 35 38 23 - 75 59 27 36 9 11 - 78 26 54 35 35 55 - 75 48 22 36 11 29 -1.34 - 77 33 23 36 10 41 11 21 51.8 28 266 -12 - 78 40 20 35 54 51 - 76 23 44 36 26 1 - 78 50 28 35 52 21 - 76 12 43 36 28 20 -1.34 - 77 57 4 36 27 17 11 21 57.7 28 265 -12 - 79 3 43 36 11 16 - 76 47 46 36 42 47 - 79 13 47 36 8 45 - 76 36 48 36 45 8 -1.34 - 78 20 30 36 43 49 11 22 3.6 28 265 -13 - 79 26 51 36 27 38 - 77 11 31 36 59 31 - 79 36 53 36 25 6 - 77 0 37 37 1 54 -1.34 - 78 43 42 37 0 20 11 22 9.6 28 265 -13 - 79 49 47 36 43 59 - 77 35 1 37 16 12 - 79 59 47 36 41 25 - 77 24 10 37 18 36 -1.34 - 79 6 40 37 16 48 11 22 15.5 29 264 -13 - 80 12 30 37 0 17 - 77 58 17 37 32 51 - 80 22 28 36 57 42 - 77 47 28 37 35 17 -1.34 - 79 29 26 37 33 14 11 22 21.4 29 264 -14 - 80 35 2 37 16 34 - 78 21 19 37 49 27 - 80 44 57 37 13 57 - 78 10 33 37 51 55 -1.35 - 79 51 59 37 49 38 11 22 27.3 29 264 -14 - 80 57 22 37 32 48 - 78 44 7 38 6 1 - 81 7 15 37 30 10 - 78 33 23 38 8 31 -1.35 - 80 14 20 38 6 1 11 22 33.3 29 263 -14 - 81 19 30 37 49 1 - 79 6 42 38 22 33 - 81 29 22 37 46 22 - 78 56 0 38 25 4 -1.35 - 80 36 29 38 22 21 11 22 39.2 30 263 -15 - 81 41 29 38 5 13 - 79 29 4 38 39 4 - 81 51 19 38 2 32 - 79 18 25 38 41 36 -1.35 - 80 58 28 38 38 40 11 22 45.1 30 262 -15 - 82 3 17 38 21 23 - 79 51 15 38 55 32 - 82 13 6 38 18 40 - 79 40 38 38 58 6 -1.35 - 81 20 16 38 54 58 11 22 51.0 30 262 -15 - 82 24 55 38 37 31 - 80 13 14 39 11 59 - 82 34 42 38 34 48 - 80 2 38 39 14 35 -1.35 - 81 41 53 39 11 14 11 22 57.0 30 262 -16 - 82 46 23 38 53 39 - 80 35 1 39 28 25 - 82 56 10 38 50 53 - 80 24 28 39 31 2 -1.35 - 82 3 21 39 27 29 11 23 2.9 31 261 -16 - 83 7 43 39 9 45 - 80 56 38 39 44 49 - 83 17 28 39 6 58 - 80 46 6 39 47 27 -1.35 - 82 24 39 39 43 42 11 23 8.8 31 261 -16 - 83 28 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7 -1.43 -139 5 39 84 47 55 11 36 40.5 18 187 -26 -142 41 44 83 33 37 -132 58 19 86 5 54 -143 7 44 83 22 28 -131 36 26 86 18 12 -1.43 -141 39 15 85 22 58 11 36 46.4 17 185 -26 -145 4 44 84 5 48 -135 17 45 86 44 36 -145 28 42 83 54 17 -133 46 2 86 57 33 -1.43 -144 55 49 85 58 39 11 36 52.3 17 181 -25 -147 55 54 84 38 24 -138 39 51 87 24 29 -148 16 13 84 26 28 -136 58 53 87 38 11 -1.43 -149 20 5 86 34 46 11 36 58.2 16 177 -25 -151 25 56 85 11 17 -144 16 0 88 5 20 -151 39 49 84 58 55 -142 38 46 88 19 59 -1.43 -155 38 34 87 10 50 11 37 4.2 16 170 -24 -155 51 12 85 44 9 -156 1 34 88 46 3 -155 53 49 85 31 23 -156 21 34 89 1 43 -1.43 -165 25 1 87 45 34 11 37 10.1 15 161 -24 -161 37 30 86 16 32 168 24 18 89 19 10 -161 20 16 86 3 24 148 38 19 89 30 33 -1.43 178 13 15 88 15 40 11 37 16.0 14 144 -23 -169 25 42 86 47 28 101 40 50 89 10 55 -168 33 20 86 34 10 84 7 43 89 3 59 -1.43 151 22 36 88 33 0 11 37 21.9 13 117 -23 179 42 47 87 15 9 75 36 17 88 27 14 -178 23 39 87 2 9 67 57 41 88 14 5 -1.43 119 22 51 88 26 14 11 37 27.8 13 85 -22 164 36 43 87 36 14 65 59 23 87 33 17 168 6 55 87 24 37 61 31 28 87 17 6 -1.44 95 51 55 87 55 42 11 37 33.8 12 62 -21 145 7 53 87 45 36 60 52 22 86 32 30 150 31 4 87 37 11 57 47 19 86 13 34 -1.45 81 48 24 87 10 20 11 37 39.7 11 48 -21 124 9 7 87 38 28 57 26 0 85 23 57 130 33 39 87 35 5 55 4 50 85 1 40 -1.46 73 1 34 86 14 54 11 37 45.6 10 39 -20 105 59 45 87 14 14 54 42 10 84 4 29 112 0 55 87 16 20 52 46 21 83 37 15 -1.47 66 57 22 85 10 6 11 37 51.5 9 33 -19 92 19 40 86 35 54 52 11 6 82 26 44 97 17 55 86 42 48 50 27 54 81 49 56 -1.49 62 17 26 83 53 46 11 37 57.5 7 28 -18 82 21 9 85 46 8 49 17 17 80 4 36 86 20 4 85 57 13 47 13 33 78 45 54 -1.53 58 16 3 82 19 20 11 38 3.4 6 24 -17 74 50 58 84 45 37 ... .. .. .. .. .. 78 4 32 85 0 48 ... .. .. .. .. .. -1.60 54 5 36 80 3 41 11 38 9.3 3 20 -15 68 52 30 83 32 39 ... .. .. .. .. .. 71 33 37 83 52 33 ... .. .. .. .. .. -1.90 .. .. .. .. .. .. .. .. .... .. .. .. 63 41 1 82 1 0 ... .. .. .. .. .. 66 3 17 82 28 14 ... .. .. .. .. .. .... .. .. .. .. .. .. .. .. .... .. .. .. 58 23 36 79 48 5 ... .. .. .. .. .. 60 47 35 80 33 30 ... .. .. .. .. .. .... Uncertainty in time = +/- 4 secs Prediction of 2022 Dec 1.1 Data for the target star ------------------------ * name: UCAC4 515-049953 * constellation : Cancer * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 09 17 42.5165 DE: +12 52 16.540 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 09 17 42.5166 DE: +12 52 16.539 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 12.3 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (53) Kalypso asteroid class: approx. diameter [km]: 106 approx. diameter ["]: 0.121 distance from Earth [AU]: 1.20480 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#180 date of fit: 2022 Nov 22 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): 0.026", 0.004", 102.558° remarks: * orbital elements for (53)Kalypso : Mean anomaly = 18.6808246963 deg Arg. of pericenter = 314.2043770118 deg Long. of node = 143.4579127577 deg Inclination = 5.1810645574 deg Eccentricity = 0.2024644558 Semimajor axis = 2.6185487160 AU Perihelion dist = 2.0883856753 AU Mag: H = 8.90, G = 0.15 Epoch of elements : MJD 59956.47812500 TDT (2023 Jan 12.4781) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1802022Nov22,17.32,2023,1,12,11.467915,0.429467,0.685898,-2.918427,1.828554,-0.002306,0.000985,0.000001,0.000000 -143.9767,12.7742,10.03,-21.64,False UCAC4 515-049953,9.29514346,12.8712611,0.00,12.34,0.00,0.0,0,,9.31626156,12.7742277,0.47,0.00,0,0,0 53,Kalypso,11.67,105.7,1.2048,0,0,-1.457,13.35,,5.4,0 0,18.5696,2023,1,12,314.2044,143.4579,5.1811,0.20246,2.61855,2.08839,8.90,5.0,0.15 1.077,0.0260,0.0037,103,0.0093,Known errors,-1.00,-1,-1,-1 20230112_049953,59914.09 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Dec 01, 02:11 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org