IOTA/IOTA-ES occultation update for (1197) Rhodesia / UCAC4 510-030006 event on 2023 Jan 15, 17:21 UT Visible from Australia Summary ------- On 2023 Jan 15 UT, the 48.4 km diameter asteroid (1197) Rhodesia will occult a 11.9 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 1.98 mag to 13.66 mag (the magnitude of the asteroid) for at most 4.430 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: 92 * date and approx. time of event: 2023 Jan 15, 17:14 - 2023 Jan 15, 17:28 * geocentric midpoint of event [JD]: 2459960.22330058 * magnitude of target star: 11.87 * magnitude drop [mag]: 1.98 * estimated maximum duration [s]: 4.430 * Moon: 44 % sunlit, 111° distance * Sun: 162° distance * rough path description: Australia The occultation path -------------------- * approximate projected width [km]: 70 * 1 sigma uncertainty interval [path widths]: +/- 0.49 * 1 sigma uncertainty interval [seconds]: +/- 3.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.038, +/- 0.014) * 1 sigma uncertainty ellipse (major, minor, PA): (0.040", 0.004", 110°) * approx speed of asteroid's shadow [km/s]: 10.9357 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 510-030006 by 1197 Rhodesia on 2023 Jan 15 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 13 0 0 -56 18 11 17 28 14.7 0 68 16 -55 57 42 .. .. .. -55 37 44 .. .. .. .... 14 0 0 -56 4 45 17 28 14.6 1 67 15 -55 44 14 -56 25 24 -55 24 14 -56 45 48 0.29 15 0 0 -55 51 6 17 28 14.5 1 67 15 -55 30 34 -56 11 47 -55 10 32 -56 32 13 0.67 16 0 0 -55 37 16 17 28 14.3 2 66 14 -55 16 42 -55 57 58 -54 56 38 -56 18 26 0.80 17 0 0 -55 23 13 17 28 13.9 2 65 13 -55 2 37 -55 43 57 -54 42 32 -56 4 26 0.86 18 0 0 -55 8 58 17 28 13.5 3 64 13 -54 48 21 -55 29 43 -54 28 14 -55 50 15 0.90 19 0 0 -54 54 31 17 28 13.0 4 63 12 -54 33 53 -55 15 18 -54 13 45 -55 35 51 0.93 20 0 0 -54 39 53 17 28 12.3 4 63 12 -54 19 13 -55 0 41 -53 59 3 -55 21 16 0.95 21 0 0 -54 25 3 17 28 11.6 5 62 11 -54 4 21 -54 45 53 -53 44 11 -55 6 29 0.96 22 0 0 -54 10 2 17 28 10.8 6 61 10 -53 49 19 -54 30 53 -53 29 7 -54 51 30 0.97 23 0 0 -53 54 49 17 28 9.8 6 60 10 -53 34 5 -54 15 42 -53 13 52 -54 36 20 0.98 24 0 0 -53 39 26 17 28 8.7 7 59 9 -53 18 41 -54 0 20 -52 58 27 -54 21 0 0.99 25 0 0 -53 23 52 17 28 7.5 7 59 8 -53 3 6 -53 44 47 -52 42 51 -54 5 28 1.00 26 0 0 -53 8 8 17 28 6.3 8 58 8 -52 47 21 -53 29 4 -52 27 4 -53 49 46 1.00 27 0 0 -52 52 14 17 28 4.8 9 57 7 -52 31 25 -53 13 11 -52 11 8 -53 33 54 1.01 28 0 0 -52 36 9 17 28 3.3 9 56 6 -52 15 20 -52 57 7 -51 55 2 -53 17 51 1.01 29 0 0 -52 19 55 17 28 1.7 10 55 6 -51 59 5 -52 40 54 -51 38 46 -53 1 38 1.01 30 0 0 -52 3 31 17 27 59.9 11 54 5 -51 42 41 -52 24 31 -51 22 21 -52 45 16 1.02 31 0 0 -51 46 59 17 27 58.0 11 54 4 -51 26 7 -52 7 59 -51 5 47 -52 28 45 1.02 32 0 0 -51 30 17 17 27 56.0 12 53 4 -51 9 25 -51 51 18 -50 49 4 -52 12 5 1.02 33 0 0 -51 13 27 17 27 53.8 13 52 3 -50 52 34 -51 34 28 -50 32 13 -51 55 16 1.02 34 0 0 -50 56 29 17 27 51.6 13 51 2 -50 35 36 -51 17 30 -50 15 14 -51 38 18 1.03 35 0 0 -50 39 22 17 27 49.2 14 50 2 -50 18 29 -51 0 25 -49 58 7 -51 21 13 1.03 36 0 0 -50 22 9 17 27 46.6 15 50 1 -50 1 15 -50 43 11 -49 40 53 -51 3 59 1.03 37 0 0 -50 4 48 17 27 44.0 15 49 0 -49 43 54 -50 25 50 -49 23 31 -50 46 39 1.03 38 0 0 -49 47 20 17 27 41.2 16 48 0 -49 26 26 -50 8 22 -49 6 3 -50 29 11 1.03 39 0 0 -49 29 45 17 27 38.3 17 47 -1 -49 8 52 -49 50 48 -48 48 29 -50 11 37 1.03 40 0 0 -49 12 5 17 27 35.2 17 46 -2 -48 51 11 -49 33 8 -48 30 49 -49 53 56 1.03 41 0 0 -48 54 19 17 27 32.0 18 46 -2 -48 33 25 -49 15 21 -48 13 3 -49 36 10 1.04 42 0 0 -48 36 27 17 27 28.7 19 45 -3 -48 15 34 -48 57 29 -47 55 12 -49 18 18 1.04 43 0 0 -48 18 31 17 27 25.2 19 44 -4 -47 57 38 -48 39 33 -47 37 16 -49 0 20 1.04 44 0 0 -48 0 30 17 27 21.6 20 43 -5 -47 39 37 -48 21 31 -47 19 15 -48 42 19 1.04 45 0 0 -47 42 25 17 27 17.9 21 42 -5 -47 21 32 -48 3 26 -47 1 11 -48 24 12 1.04 46 0 0 -47 24 16 17 27 14.0 21 41 -6 -47 3 24 -47 45 16 -46 43 3 -48 6 2 1.04 47 0 0 -47 6 3 17 27 10.0 22 41 -7 -46 45 12 -47 27 3 -46 24 52 -47 47 49 1.04 48 0 0 -46 47 48 17 27 5.9 23 40 -7 -46 26 58 -47 8 48 -46 6 39 -47 29 32 1.04 49 0 0 -46 29 31 17 27 1.6 23 39 -8 -46 8 41 -46 50 29 -45 48 23 -47 11 13 1.04 50 0 0 -46 11 11 17 26 57.2 24 38 -9 -45 50 23 -46 32 9 -45 30 5 -46 52 52 1.04 51 0 0 -45 52 50 17 26 52.6 25 37 -9 -45 32 3 -46 13 47 -45 11 46 -46 34 29 1.04 52 0 0 -45 34 28 17 26 47.9 25 36 -10 -45 13 42 -45 55 24 -44 53 26 -46 16 5 1.04 53 0 0 -45 16 6 17 26 43.1 26 35 -11 -44 55 20 -45 37 0 -44 35 5 -45 57 40 1.04 54 0 0 -44 57 43 17 26 38.2 27 34 -12 -44 36 58 -45 18 36 -44 16 45 -45 39 15 1.05 55 0 0 -44 39 20 17 26 33.1 27 34 -12 -44 18 37 -45 0 12 -43 58 24 -45 20 50 1.05 56 0 0 -44 20 58 17 26 27.9 28 33 -13 -44 0 16 -44 41 49 -43 40 5 -45 2 25 1.05 57 0 0 -44 2 37 17 26 22.5 29 32 -14 -43 41 57 -44 23 27 -43 21 47 -44 44 2 1.05 58 0 0 -43 44 18 17 26 17.1 29 31 -14 -43 23 39 -44 5 6 -43 3 30 -44 25 40 1.05 59 0 0 -43 26 1 17 26 11.5 30 30 -15 -43 5 23 -43 46 48 -42 45 16 -44 7 20 1.05 60 0 0 -43 7 47 17 26 5.7 30 29 -16 -42 47 10 -43 28 32 -42 27 5 -43 49 2 1.05 61 0 0 -42 49 35 17 25 59.9 31 28 -16 -42 29 1 -43 10 19 -42 8 56 -43 30 48 1.05 62 0 0 -42 31 27 17 25 53.9 32 27 -17 -42 10 54 -42 52 9 -41 50 51 -43 12 37 1.05 63 0 0 -42 13 23 17 25 47.8 32 26 -18 -41 52 52 -42 34 3 -41 32 50 -42 54 29 1.05 64 0 0 -41 55 23 17 25 41.6 33 25 -18 -41 34 54 -42 16 2 -41 14 54 -42 36 26 1.05 65 0 0 -41 37 29 17 25 35.3 33 24 -19 -41 17 0 -41 58 5 -40 57 2 -42 18 27 1.05 66 0 0 -41 19 39 17 25 28.8 34 23 -20 -40 59 12 -41 40 14 -40 39 16 -42 0 34 1.05 67 0 0 -41 1 55 17 25 22.3 35 22 -20 -40 41 30 -41 22 28 -40 21 36 -41 42 47 1.05 68 0 0 -40 44 17 17 25 15.6 35 21 -21 -40 23 54 -41 4 48 -40 4 2 -41 25 5 1.05 69 0 0 -40 26 46 17 25 8.8 36 20 -22 -40 6 25 -40 47 15 -39 46 34 -41 7 30 1.05 70 0 0 -40 9 22 17 25 1.9 36 19 -22 -39 49 3 -40 29 49 -39 29 14 -40 50 2 1.05 71 0 0 -39 52 5 17 24 55.0 37 18 -23 -39 31 48 -40 12 31 -39 12 1 -40 32 42 1.05 72 0 0 -39 34 56 17 24 47.9 37 17 -24 -39 14 41 -39 55 20 -38 54 56 -40 15 29 1.05 73 0 0 -39 17 56 17 24 40.7 38 16 -24 -38 57 43 -39 38 17 -38 37 59 -39 58 24 1.05 74 0 0 -39 1 4 17 24 33.4 38 15 -25 -38 40 53 -39 21 24 -38 21 11 -39 41 29 1.05 75 0 0 -38 44 22 17 24 26.1 39 13 -25 -38 24 12 -39 4 39 -38 4 32 -39 24 42 1.05 76 0 0 -38 27 48 17 24 18.6 39 12 -26 -38 7 41 -38 48 4 -37 48 3 -39 8 5 1.05 77 0 0 -38 11 25 17 24 11.1 39 11 -27 -37 51 20 -38 31 39 -37 31 44 -38 51 38 1.05 78 0 0 -37 55 12 17 24 3.5 40 10 -27 -37 35 9 -38 15 24 -37 15 35 -38 35 21 1.05 79 0 0 -37 39 10 17 23 55.8 40 9 -28 -37 19 9 -37 59 19 -36 59 37 -38 19 14 1.05 80 0 0 -37 23 19 17 23 48.1 41 7 -28 -37 3 20 -37 43 26 -36 43 50 -38 3 19 1.05 81 0 0 -37 7 40 17 23 40.2 41 6 -29 -36 47 42 -37 27 45 -36 28 14 -37 47 36 1.05 82 0 0 -36 52 12 17 23 32.3 41 5 -29 -36 32 16 -37 12 15 -36 12 50 -37 32 4 1.05 83 0 0 -36 36 56 17 23 24.4 42 4 -30 -36 17 3 -36 56 57 -35 57 38 -37 16 44 1.05 84 0 0 -36 21 53 17 23 16.4 42 3 -30 -36 2 2 -36 41 52 -35 42 39 -37 1 37 1.05 85 0 0 -36 7 3 17 23 8.3 42 1 -31 -35 47 13 -36 27 0 -35 27 53 -36 46 42 1.05 86 0 0 -35 52 26 17 23 0.2 42 360 -31 -35 32 38 -36 12 21 -35 13 19 -36 32 1 1.05 87 0 0 -35 38 2 17 22 52.0 43 359 -32 -35 18 17 -35 57 55 -34 59 0 -36 17 34 1.05 88 0 0 -35 23 52 17 22 43.8 43 357 -32 -35 4 9 -35 43 44 -34 44 54 -36 3 20 1.05 89 0 0 -35 9 57 17 22 35.5 43 356 -33 -34 50 15 -35 29 46 -34 31 2 -35 49 21 1.05 90 0 0 -34 56 16 17 22 27.3 43 355 -33 -34 36 36 -35 16 3 -34 17 25 -35 35 36 1.05 91 0 0 -34 42 50 17 22 18.9 43 353 -33 -34 23 12 -35 2 35 -34 4 2 -35 22 6 1.05 92 0 0 -34 29 39 17 22 10.6 43 352 -34 -34 10 3 -34 49 22 -33 50 55 -35 8 51 1.05 93 0 0 -34 16 43 17 22 2.2 44 351 -34 -33 57 9 -34 36 24 -33 38 2 -34 55 52 1.05 94 0 0 -34 4 3 17 21 53.8 44 350 -34 -33 44 30 -34 23 42 -33 25 26 -34 43 8 1.05 95 0 0 -33 51 38 17 21 45.4 44 348 -35 -33 32 8 -34 11 16 -33 13 5 -34 30 40 1.05 96 0 0 -33 39 30 17 21 37.0 44 347 -35 -33 20 1 -33 59 7 -33 1 0 -34 18 29 1.05 97 0 0 -33 27 39 17 21 28.5 44 346 -35 -33 8 11 -33 47 13 -32 49 12 -34 6 33 1.05 98 0 0 -33 16 4 17 21 20.1 44 344 -36 -32 56 38 -33 35 37 -32 37 40 -33 54 55 1.05 99 0 0 -33 4 46 17 21 11.7 44 343 -36 -32 45 22 -33 24 17 -32 26 25 -33 43 34 1.05 100 0 0 -32 53 45 17 21 3.2 44 342 -36 -32 34 22 -33 13 14 -32 15 28 -33 32 30 1.05 101 0 0 -32 43 1 17 20 54.8 43 340 -36 -32 23 40 -33 2 29 -32 4 47 -33 21 43 1.05 102 0 0 -32 32 36 17 20 46.4 43 339 -37 -32 13 16 -32 52 2 -31 54 24 -33 11 14 1.05 103 0 0 -32 22 28 17 20 38.0 43 338 -37 -32 3 10 -32 41 53 -31 44 19 -33 1 3 1.05 104 0 0 -32 12 38 17 20 29.6 43 336 -37 -31 53 21 -32 32 1 -31 34 32 -32 51 10 1.05 105 0 0 -32 3 6 17 20 21.2 43 335 -37 -31 43 51 -32 22 28 -31 25 3 -32 41 36 1.05 106 0 0 -31 53 53 17 20 12.9 43 334 -37 -31 34 39 -32 13 13 -31 15 52 -32 32 20 1.05 107 0 0 -31 44 58 17 20 4.6 42 333 -37 -31 25 45 -32 4 17 -31 7 0 -32 23 23 1.05 108 0 0 -31 36 22 17 19 56.3 42 331 -37 -31 17 11 -31 55 40 -30 58 27 -32 14 44 1.05 109 0 0 -31 28 5 17 19 48.1 42 330 -37 -31 8 55 -31 47 22 -30 50 12 -32 6 25 1.05 110 0 0 -31 20 8 17 19 39.9 41 329 -37 -31 0 59 -31 39 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26 36 -32 5 23 -31 7 44 -32 24 35 1.09 159 0 0 -31 55 8 17 15 1.8 9 290 -15 -31 35 46 -32 14 36 -31 16 53 -32 33 50 1.09 160 0 0 -32 4 39 17 14 59.8 8 290 -14 -31 45 16 -32 24 9 -31 26 21 -32 43 25 1.10 161 0 0 -32 14 31 17 14 58.1 8 289 -14 -31 55 6 -32 34 2 -31 36 9 -32 53 20 1.10 162 0 0 -32 24 42 17 14 56.5 7 289 -13 -32 5 16 -32 44 16 -31 46 17 -33 3 35 1.11 163 0 0 -32 35 13 17 14 55.1 6 288 -12 -32 15 45 -32 54 48 -31 56 45 -33 14 9 1.12 164 0 0 -32 46 4 17 14 53.9 5 288 -11 -32 26 34 -33 5 41 -32 7 32 -33 25 3 1.13 165 0 0 -32 57 13 17 14 52.9 4 287 -10 -32 37 42 -33 16 52 -32 18 38 -33 36 17 1.14 166 0 0 -33 8 42 17 14 52.1 3 287 -10 -32 49 9 -33 28 23 -32 30 3 -33 47 49 1.16 167 0 0 -33 20 30 17 14 51.4 3 286 -9 -33 0 54 -33 40 12 -32 41 47 -33 59 41 1.19 168 0 0 -33 32 36 17 14 51.0 2 285 -8 -33 12 58 -33 52 20 -32 53 49 -34 11 51 1.26 169 0 0 -33 45 0 17 14 50.7 1 285 -7 -33 25 21 -34 4 47 -33 6 10 -34 24 19 1.47 170 0 0 .. .. .... .. .. .. .. .. .. -33 38 1 .. .. .. -33 18 48 .. .. .. .... Uncertainty in time = +/- 4 secs Prediction of 2022 Dec 1.1 Data for the target star ------------------------ * name: UCAC4 510-030006 * constellation : Gemini * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 06 45 16.9743 DE: +11 55 04.908 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 06 45 16.9743 DE: +11 55 04.908 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 11.9 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1197) Rhodesia asteroid class: approx. diameter [km]: 48 approx. diameter ["]: 0.044 distance from Earth [AU]: 1.52550 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#54 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): 0.040", 0.004", 110.035° remarks: * orbital elements for (1197)Rhodesia : Mean anomaly = 317.2278825268 deg Arg. of pericenter = 277.0664514389 deg Long. of node = 255.6157994258 deg Inclination = 12.9776962115 deg Eccentricity = 0.2342700207 Semimajor axis = 2.8821392342 AU Perihelion dist = 2.2069404160 AU Mag: H = 10.24, G = 0.15 Epoch of elements : MJD 59959.72319445 TDT (2023 Jan 15.7232) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#542022Nov22,4.43,2023,1,15,17.359214,0.146200,-0.707231,-6.044605,-1.249611,0.001434,0.000978,0.000001,0.000000 86.3564,11.8938,-78.04,-21.08,False UCAC4 510-030006,6.75471508,11.9180300,0.00,11.87,0.00,0.0,0,,6.77636237,11.8938472,1.98,0.00,0,0,0 1197,Rhodesia,13.66,48.4,1.5255,0,0,-2.373,-7.20,,2.4,0 0,317.0822,2023,1,15,277.0665,255.6158,12.9777,0.23427,2.88214,2.20694,10.26,5.0,0.15 1.491,0.0403,0.0040,110,0.0215,Known errors,-1.00,-1,-1,-1 20230115_030006,59914.09 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Dec 01, 02:12 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org