IOTA/IOTA-ES occultation update for (4138) Kalchas / TYC 1324-01557-1 event on 2022 Nov 30, 03:07 UT Visible from Africa, South America Summary ------- On 2022 Nov 30 UT, the 48.5 km diameter asteroid (4138) Kalchas will occult a 11.0 mag star in the constellation Orion for observers along a path across Africa, South America. In the case of an occultation, the combined light of the asteroid and the star will drop by 6.14 mag to 17.14 mag (the magnitude of the asteroid) for at most 3.210 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: 90 * date and approx. time of event: 2022 Nov 30, 03:01 - 2022 Nov 30, 03:14 * geocentric midpoint of event [JD]: 2459913.63034700 * magnitude of target star: 11.00 * magnitude drop [mag]: 6.14 * estimated maximum duration [s]: 3.210 * Moon: 44 % sunlit, 117° distance * Sun: 159° distance * rough path description: Africa, South America The occultation path -------------------- * approximate projected width [km]: 54 * 1 sigma uncertainty interval [path widths]: +/- 0.53 * 1 sigma uncertainty interval [seconds]: +/- 4.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.022, +/- 0.008) * 1 sigma uncertainty ellipse (major, minor, PA): (0.022", 0.008", 92°) * approx speed of asteroid's shadow [km/s]: 15.1246 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1324-01557-1 by 4138 Kalchas on 2022 Nov 30 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 -107 0 0 -27 36 32 3 13 58.1 0 66 -17 -27 20 19 -27 52 47 -27 3 12 -28 10 2 .... -106 0 0 -27 12 29 3 13 58.0 1 65 -18 -26 56 17 -27 28 44 -26 39 10 -27 45 59 0.18 -105 0 0 -26 48 25 3 13 57.7 2 65 -19 -26 32 13 -27 4 39 -26 15 7 -27 21 54 0.33 -104 0 0 -26 24 19 3 13 57.4 3 64 -20 -26 8 7 -26 40 33 -25 51 2 -26 57 47 0.39 -103 0 0 -26 0 13 3 13 56.9 4 64 -21 -25 44 2 -26 16 27 -25 26 57 -26 33 40 0.42 -102 0 0 -25 36 7 3 13 56.2 5 63 -22 -25 19 56 -25 52 20 -25 2 52 -26 9 33 0.44 -101 0 0 -25 12 1 3 13 55.4 6 63 -23 -24 55 51 -25 28 14 -24 38 48 -25 45 26 0.45 -100 0 0 -24 47 57 3 13 54.5 7 63 -24 -24 31 48 -25 4 9 -24 14 45 -25 21 20 0.46 - 99 0 0 -24 23 55 3 13 53.4 8 62 -25 -24 7 47 -24 40 6 -23 50 44 -24 57 17 0.47 - 98 0 0 -23 59 55 3 13 52.2 9 62 -26 -23 43 48 -24 16 6 -23 26 46 -24 33 15 0.47 - 97 0 0 -23 35 59 3 13 50.9 10 61 -27 -23 19 52 -23 52 8 -23 2 51 -24 9 17 0.48 - 96 0 0 -23 12 6 3 13 49.4 11 61 -28 -22 56 0 -23 28 15 -22 39 1 -23 45 23 0.48 - 95 0 0 -22 48 18 3 13 47.7 12 61 -29 -22 32 13 -23 4 26 -22 15 14 -23 21 33 0.48 - 94 0 0 -22 24 35 3 13 45.9 13 60 -30 -22 8 31 -22 40 41 -21 51 33 -22 57 47 0.49 - 93 0 0 -22 0 57 3 13 44.0 14 60 -30 -21 44 54 -22 17 3 -21 27 58 -22 34 8 0.49 - 92 0 0 -21 37 26 3 13 42.0 15 59 -31 -21 21 24 -21 53 30 -21 4 28 -22 10 34 0.49 - 91 0 0 -21 14 1 3 13 39.7 16 59 -32 -20 58 0 -21 30 5 -20 41 6 -21 47 7 0.49 - 90 0 0 -20 50 44 3 13 37.4 17 59 -33 -20 34 44 -21 6 46 -20 17 51 -21 23 47 0.49 - 89 0 0 -20 27 35 3 13 34.9 18 58 -34 -20 11 36 -20 43 36 -19 54 44 -21 0 36 0.49 - 88 0 0 -20 4 34 3 13 32.3 19 58 -35 -19 48 37 -20 20 34 -19 31 46 -20 37 32 0.50 - 87 0 0 -19 41 42 3 13 29.5 20 57 -36 -19 25 46 -19 57 41 -19 8 57 -20 14 38 0.50 - 86 0 0 -19 19 0 3 13 26.7 21 57 -37 -19 3 6 -19 34 58 -18 46 18 -19 51 53 0.50 - 85 0 0 -18 56 29 3 13 23.6 22 57 -38 -18 40 35 -19 12 24 -18 23 49 -19 29 19 0.50 - 84 0 0 -18 34 8 3 13 20.5 23 56 -39 -18 18 16 -18 50 2 -18 1 30 -19 6 55 0.50 - 83 0 0 -18 11 58 3 13 17.2 24 56 -40 -17 56 7 -18 27 51 -17 39 23 -18 44 42 0.50 - 82 0 0 -17 49 59 3 13 13.7 25 55 -40 -17 34 10 -18 5 51 -17 17 28 -18 22 41 0.50 - 81 0 0 -17 28 14 3 13 10.2 26 55 -41 -17 12 26 -17 44 4 -16 55 45 -18 0 52 0.50 - 80 0 0 -17 6 40 3 13 6.5 27 55 -42 -16 50 54 -17 22 29 -16 34 15 -17 39 16 0.50 - 79 0 0 -16 45 20 3 13 2.7 28 54 -43 -16 29 36 -17 1 8 -16 12 58 -17 17 53 0.50 - 78 0 0 -16 24 14 3 12 58.8 29 54 -44 -16 8 31 -16 40 0 -15 51 55 -16 56 43 0.50 - 77 0 0 -16 3 22 3 12 54.7 30 53 -45 -15 47 40 -16 19 6 -15 31 6 -16 35 48 0.50 - 76 0 0 -15 42 44 3 12 50.6 31 53 -45 -15 27 4 -15 58 27 -15 10 31 -16 15 7 0.50 - 75 0 0 -15 22 22 3 12 46.3 32 52 -46 -15 6 43 -15 38 3 -14 50 12 -15 54 42 0.50 - 74 0 0 -15 2 15 3 12 41.9 33 52 -47 -14 46 37 -15 17 54 -14 30 8 -15 34 31 0.50 - 73 0 0 -14 42 23 3 12 37.4 34 51 -48 -14 26 47 -14 58 1 -14 10 19 -15 14 37 0.50 - 72 0 0 -14 22 48 3 12 32.7 35 51 -49 -14 7 14 -14 38 25 -13 50 47 -14 54 58 0.50 - 71 0 0 -14 3 29 3 12 28.0 35 50 -49 -13 47 57 -14 19 4 -13 31 32 -14 35 37 0.50 - 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6 53 42 - 7 23 34 - 6 37 56 - 7 39 26 0.51 5 0 0 - 7 18 6 3 4 12.7 48 313 -30 - 7 3 10 - 7 33 4 - 6 47 23 - 7 48 57 0.51 6 0 0 - 7 27 58 3 4 6.7 47 313 -29 - 7 13 1 - 7 42 58 - 6 57 14 - 7 58 52 0.51 7 0 0 - 7 38 14 3 4 0.8 46 312 -28 - 7 23 16 - 7 53 14 - 7 7 27 - 8 9 10 0.51 8 0 0 - 7 48 53 3 3 55.0 45 311 -27 - 7 33 53 - 8 3 54 - 7 18 4 - 8 19 51 0.51 9 0 0 - 7 59 55 3 3 49.3 45 311 -26 - 7 44 54 - 8 14 57 - 7 29 3 - 8 30 55 0.51 10 0 0 - 8 11 19 3 3 43.6 44 310 -25 - 7 56 18 - 8 26 23 - 7 40 25 - 8 42 22 0.51 11 0 0 - 8 23 7 3 3 38.1 43 310 -24 - 8 8 4 - 8 38 12 - 7 52 11 - 8 54 12 0.51 12 0 0 - 8 35 17 3 3 32.6 42 309 -23 - 8 20 13 - 8 50 23 - 8 4 18 - 9 6 25 0.51 13 0 0 - 8 47 50 3 3 27.2 41 308 -22 - 8 32 44 - 9 2 57 - 8 16 48 - 9 19 0 0.51 14 0 0 - 9 0 45 3 3 21.9 40 308 -21 - 8 45 38 - 9 15 53 - 8 29 41 - 9 31 57 0.51 15 0 0 - 9 14 2 3 3 16.6 39 307 -20 - 8 58 54 - 9 29 12 - 8 42 55 - 9 45 17 0.51 16 0 0 - 9 27 41 3 3 11.5 38 307 -19 - 9 12 32 - 9 42 52 - 8 56 32 - 9 58 59 0.51 17 0 0 - 9 41 42 3 3 6.5 37 306 -18 - 9 26 31 - 9 56 55 - 9 10 30 -10 13 3 0.51 18 0 0 - 9 56 4 3 3 1.5 37 306 -17 - 9 40 52 -10 11 19 - 9 24 49 -10 27 28 0.51 19 0 0 -10 10 48 3 2 56.7 36 306 -16 - 9 55 35 -10 26 4 - 9 39 31 -10 42 15 0.51 20 0 0 -10 25 54 3 2 52.0 35 305 -16 -10 10 39 -10 41 11 - 9 54 33 -10 57 24 0.52 21 0 0 -10 41 20 3 2 47.4 34 305 -15 -10 26 4 -10 56 38 -10 9 56 -11 12 53 0.52 22 0 0 -10 57 7 3 2 42.9 33 304 -14 -10 41 49 -11 12 27 -10 25 40 -11 28 43 0.52 23 0 0 -11 13 15 3 2 38.4 32 304 -13 -10 57 55 -11 28 36 -10 41 45 -11 44 54 0.52 24 0 0 -11 29 42 3 2 34.2 31 304 -12 -11 14 22 -11 45 5 -10 58 9 -12 1 24 0.52 25 0 0 -11 46 30 3 2 30.0 30 303 -11 -11 31 8 -12 1 55 -11 14 54 -12 18 15 0.52 26 0 0 -12 3 38 3 2 25.9 29 303 -10 -11 48 14 -12 19 4 -11 31 59 -12 35 26 0.52 27 0 0 -12 21 5 3 2 22.0 28 302 -9 -12 5 40 -12 36 32 -11 49 23 -12 52 56 0.52 28 0 0 -12 38 51 3 2 18.1 27 302 -8 -12 23 24 -12 54 20 -12 7 6 -13 10 46 0.52 29 0 0 -12 56 56 3 2 14.4 26 302 -7 -12 41 28 -13 12 27 -12 25 8 -13 28 54 0.52 30 0 0 -13 15 20 3 2 10.8 25 301 -6 -12 59 50 -13 30 52 -12 43 28 -13 47 21 0.52 31 0 0 -13 34 2 3 2 7.4 24 301 -5 -13 18 30 -13 49 35 -13 2 7 -14 6 6 0.52 32 0 0 -13 53 1 3 2 4.1 23 301 -4 -13 37 28 -14 8 37 -13 21 3 -14 25 9 0.52 33 0 0 -14 12 19 3 2 0.9 22 300 -3 -13 56 44 -14 27 55 -13 40 17 -14 44 30 0.52 34 0 0 -14 31 53 3 1 57.8 21 300 -2 -14 16 17 -14 47 31 -13 59 48 -15 4 7 0.52 35 0 0 -14 51 44 3 1 54.9 20 300 -1 -14 36 6 -15 7 24 -14 19 36 -15 24 2 0.52 36 0 0 -15 11 51 3 1 52.1 19 299 0 -14 56 12 -15 27 33 -14 39 40 -15 44 12 0.52 37 0 0 -15 32 15 3 1 49.4 18 299 1 -15 16 34 -15 47 58 -15 0 1 -16 4 39 0.52 38 0 0 -15 52 54 3 1 46.9 17 299 2 -15 37 11 -16 8 38 -15 20 36 -16 25 21 0.52 39 0 0 -16 13 48 3 1 44.5 16 299 3 -15 58 4 -16 29 34 -15 41 27 -16 46 18 0.52 40 0 0 -16 34 56 3 1 42.2 15 298 4 -16 19 11 -16 50 44 -16 2 33 -17 7 30 0.52 41 0 0 -16 56 19 3 1 40.1 14 298 5 -16 40 32 -17 12 9 -16 23 53 -17 28 56 0.52 42 0 0 -17 17 56 3 1 38.1 13 298 6 -17 2 7 -17 33 47 -16 45 26 -17 50 36 0.53 43 0 0 -17 39 46 3 1 36.3 12 297 8 -17 23 56 -17 55 38 -17 7 13 -18 12 29 0.53 44 0 0 -18 1 48 3 1 34.6 11 297 9 -17 45 57 -18 17 42 -17 29 13 -18 34 34 0.53 45 0 0 -18 24 3 3 1 33.1 10 297 10 -18 8 10 -18 39 58 -17 51 24 -18 56 52 0.53 46 0 0 -18 46 29 3 1 31.7 9 296 11 -18 30 35 -19 2 26 -18 13 48 -19 19 21 0.53 47 0 0 -19 9 7 3 1 30.5 8 296 12 -18 53 12 -19 25 5 -18 36 23 -19 42 2 0.53 48 0 0 -19 31 55 3 1 29.4 7 296 13 -19 15 59 -19 47 55 -18 59 8 -20 4 53 0.53 49 0 0 -19 54 54 3 1 28.4 6 295 14 -19 38 56 -20 10 54 -19 22 4 -20 27 54 0.54 50 0 0 -20 18 2 3 1 27.6 5 295 15 -20 2 2 -20 34 4 -19 45 9 -20 51 4 0.54 51 0 0 -20 41 18 3 1 26.9 4 295 16 -20 25 18 -20 57 22 -20 8 24 -21 14 24 0.54 52 0 0 -21 4 44 3 1 26.4 3 294 17 -20 48 42 -21 20 48 -20 31 47 -21 37 51 0.55 53 0 0 -21 28 17 3 1 26.1 2 294 18 -21 12 14 -21 44 22 -20 55 17 -22 1 27 0.57 54 0 0 -21 51 57 3 1 25.9 1 293 19 -21 35 53 -22 8 3 -21 18 55 -22 25 9 0.62 55 0 0 -22 15 44 3 1 25.8 0 293 20 -21 59 38 .. .. .. -21 42 40 .. .. .. 3.94 Uncertainty in time = +/- 4 secs Prediction of 2022 Oct 2.0 Data for the target star ------------------------ * name: TYC 1324-01557-1 * constellation : Orion * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 05 52 33.4888 DE: +21 17 23.099 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 05 52 33.4888 DE: +21 17 23.099 * position source: Gaia EDR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.0 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (4138) Kalchas asteroid class: approx. diameter [km]: 49 approx. diameter ["]: 0.016 distance from Earth [AU]: 4.14980 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#52 date of fit: 2022 Sep 21 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): 0.022", 0.008", 92.241° remarks: * orbital elements for (4138)Kalchas : Mean anomaly = 65.2475512591 deg Arg. of pericenter = 166.3359131606 deg Long. of node = 208.0064838011 deg Inclination = 2.0978374417 deg Eccentricity = 0.0447296309 Semimajor axis = 5.1719045541 AU Perihelion dist = 4.9405671725 AU Mag: H = 10.15, G = 0.15 Epoch of elements : MJD 59913.13034722 TDT (2022 Nov 30.1303) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#522022Sep21,3.21,2022,11,30,3.128328,0.023228,-0.450202,-8.525426,-0.439339,-0.002143,0.000196,0.000001,0.000000 -27.4159,21.2954,130.21,-21.62,False TYC 1324-01557-1,5.87596912,21.2897496,0.00,11.00,0.00,0.0,0,,5.89900046,21.2954022,6.15,0.00,0,0,0 4138,Kalchas,17.14,48.5,4.1498,0,0,-1.292,-0.93,,4.4,0 0,65.2366,2022,11,30,166.3359,208.0065,2.0978,0.04473,5.17190,4.94057,10.16,5.0,0.15 1.529,0.0217,0.0083,92,0.0085,Known errors,-1.00,-1,-1,-1 20221130_1557-1,59854.01 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Oct 02, 00:11 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org