IOTA/IOTA-ES occultation update for (28005) 1997 XC / TYC 237-00827-1 event on 2024 Oct 19, 20:44 UT Visible from Summary ------- On 2024 Oct 19 UT, the 15.1330906865626 km diameter asteroid (28005) 1997 XC will occult a 10.1 mag star in the constellation Sextans for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 7.90 mag to 18.00 mag (the magnitude of the asteroid) for at most 0.420 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: 2024 Oct 19, 20:41 - 2024 Oct 19, 20:47 * geocentric midpoint of event [JD]: 2460603.36431554 * magnitude of target star: 10.10 * magnitude drop [mag]: 7.90 * estimated maximum duration [s]: 0.420 * Moon: 91 % sunlit, 89° distance * Sun: 58° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 15 * 1 sigma uncertainty interval [path widths]: +/- 0.49 * 1 sigma uncertainty interval [seconds]: +/- 1.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.023, +/- 0.010) * 1 sigma uncertainty ellipse (major, minor, PA): (0.025", 0.003", 113°) * approx speed of asteroid's shadow [km/s]: 36.4554 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 237-00827-1 by 28005 1997 XC on 2024 Oct 19 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 78 0 0 32 59 18 20 41 42.5 0 88 -53 32 55 8 33 3 27 32 51 3 33 7 32 .... 79 0 0 33 0 38 20 41 42.5 1 89 -52 32 56 28 33 4 48 32 52 23 33 8 53 -0.05 80 0 0 33 1 33 20 41 42.6 2 89 -51 32 57 23 33 5 43 32 53 19 33 9 48 -0.06 81 0 0 33 2 3 20 41 42.7 3 90 -51 32 57 53 33 6 12 32 53 48 33 10 17 -0.06 82 0 0 33 2 7 20 41 42.8 4 90 -50 32 57 57 33 6 16 32 53 52 33 10 21 -0.07 83 0 0 33 1 45 20 41 43.0 4 91 -49 32 57 36 33 5 55 32 53 31 33 10 0 -0.07 84 0 0 33 0 59 20 41 43.2 5 92 -48 32 56 49 33 5 8 32 52 44 33 9 13 -0.07 85 0 0 32 59 47 20 41 43.5 6 92 -48 32 55 37 33 3 56 32 51 32 33 8 1 -0.07 86 0 0 32 58 9 20 41 43.8 7 93 -47 32 53 59 33 2 19 32 49 54 33 6 24 -0.07 87 0 0 32 56 6 20 41 44.1 8 93 -46 32 51 56 33 0 16 32 47 51 33 4 21 -0.07 88 0 0 32 53 37 20 41 44.5 9 94 -45 32 49 27 32 57 47 32 45 22 33 1 52 -0.07 89 0 0 32 50 43 20 41 44.9 9 94 -44 32 46 33 32 54 53 32 42 27 32 58 58 -0.07 90 0 0 32 47 23 20 41 45.3 10 95 -44 32 43 13 32 51 33 32 39 7 32 55 38 -0.07 91 0 0 32 43 37 20 41 45.8 11 95 -43 32 39 27 32 47 47 32 35 21 32 51 53 -0.07 92 0 0 32 39 26 20 41 46.3 12 96 -42 32 35 15 32 43 36 32 31 10 32 47 42 -0.07 93 0 0 32 34 49 20 41 46.9 13 96 -41 32 30 38 32 38 59 32 26 32 32 43 5 -0.07 94 0 0 32 29 46 20 41 47.5 14 97 -40 32 25 35 32 33 57 32 21 29 32 38 3 -0.07 95 0 0 32 24 17 20 41 48.1 15 97 -40 32 20 6 32 28 28 32 16 0 32 32 35 -0.07 96 0 0 32 18 22 20 41 48.8 15 98 -39 32 14 11 32 22 34 32 10 5 32 26 41 -0.07 97 0 0 32 12 2 20 41 49.5 16 99 -38 32 7 50 32 16 13 32 3 43 32 20 20 -0.07 98 0 0 32 5 15 20 41 50.3 17 99 -37 32 1 3 32 9 27 31 56 56 32 13 34 -0.07 99 0 0 31 58 2 20 41 51.1 18 100 -36 31 53 50 32 2 15 31 49 43 32 6 22 -0.07 100 0 0 31 50 24 20 41 51.9 19 100 -36 31 46 11 31 54 36 31 42 3 31 58 44 -0.07 101 0 0 31 42 18 20 41 52.8 20 101 -35 31 38 6 31 46 31 31 33 58 31 50 39 -0.07 102 0 0 31 33 47 20 41 53.7 21 101 -34 31 29 34 31 38 0 31 25 25 31 42 9 -0.07 103 0 0 31 24 49 20 41 54.6 21 102 -33 31 20 36 31 29 3 31 16 27 31 33 12 -0.07 104 0 0 31 15 25 20 41 55.6 22 102 -32 31 11 11 31 19 39 31 7 2 31 23 48 -0.07 105 0 0 31 5 34 20 41 56.7 23 103 -32 31 1 20 31 9 49 30 57 11 31 13 58 -0.07 106 0 0 30 55 17 20 41 57.8 24 103 -31 30 51 2 30 59 32 30 46 52 31 3 42 -0.07 107 0 0 30 44 33 20 41 58.9 25 104 -30 30 40 18 30 48 48 30 36 8 30 52 59 -0.07 108 0 0 30 33 22 20 42 0.0 26 104 -29 30 29 7 30 37 38 30 24 56 30 41 49 -0.07 109 0 0 30 21 45 20 42 1.2 27 105 -28 30 17 29 30 26 1 30 13 18 30 30 12 -0.07 110 0 0 30 9 41 20 42 2.5 28 105 -27 30 5 24 30 13 57 30 1 12 30 18 9 -0.07 111 0 0 29 57 9 20 42 3.8 29 106 -26 29 52 52 30 1 26 29 48 40 30 5 38 -0.07 112 0 0 29 44 11 20 42 5.1 29 106 -26 29 39 54 29 48 28 29 35 41 29 52 41 -0.07 113 0 0 29 30 46 20 42 6.5 30 107 -25 29 26 28 29 35 4 29 22 15 29 39 17 -0.07 114 0 0 29 16 53 20 42 7.9 31 108 -24 29 12 35 29 21 12 29 8 21 29 25 26 -0.07 115 0 0 29 2 34 20 42 9.4 32 108 -23 28 58 15 29 6 53 28 54 1 29 11 7 -0.07 116 0 0 28 47 47 20 42 10.9 33 109 -22 28 43 28 28 52 7 28 39 13 28 56 21 -0.07 117 0 0 28 32 33 20 42 12.4 34 109 -21 28 28 13 28 36 53 28 23 58 28 41 9 -0.07 118 0 0 28 16 52 20 42 14.0 35 110 -20 28 12 32 28 21 13 28 8 16 28 25 29 -0.07 119 0 0 28 0 44 20 42 15.7 36 110 -19 27 56 22 28 5 5 27 52 6 28 9 21 -0.07 120 0 0 27 44 8 20 42 17.4 37 111 -19 27 39 46 27 48 30 27 35 29 27 52 47 -0.07 121 0 0 27 27 5 20 42 19.1 38 111 -18 27 22 42 27 31 27 27 18 25 27 35 45 -0.07 122 0 0 27 9 34 20 42 20.9 39 112 -17 27 5 11 27 13 57 27 0 53 27 18 15 -0.07 123 0 0 26 51 37 20 42 22.7 40 112 -16 26 47 13 26 56 0 26 42 54 27 0 19 -0.07 124 0 0 26 33 11 20 42 24.6 41 113 -15 26 28 47 26 37 36 26 24 28 26 41 55 -0.07 125 0 0 26 14 19 20 42 26.5 41 113 -14 26 9 54 26 18 44 26 5 34 26 23 4 -0.07 126 0 0 25 55 0 20 42 28.5 42 114 -13 25 50 34 25 59 25 25 46 14 26 3 46 -0.07 127 0 0 25 35 13 20 42 30.5 43 114 -12 25 30 47 25 39 39 25 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39 16 -22 51 53 -22 35 7 -0.08 -120 0 0 -22 53 7 20 47 25.0 15 278 71 -22 57 21 -22 48 54 -23 1 29 -22 44 45 -0.08 -119 0 0 -23 2 16 20 47 25.7 14 278 70 -23 6 29 -22 58 3 -23 10 37 -22 53 55 -0.08 -118 0 0 -23 10 57 20 47 26.4 13 278 69 -23 15 9 -23 6 44 -23 19 17 -23 2 36 -0.08 -117 0 0 -23 19 9 20 47 27.0 12 277 68 -23 23 22 -23 14 57 -23 27 29 -23 10 49 -0.08 -116 0 0 -23 26 54 20 47 27.6 12 277 67 -23 31 6 -23 22 41 -23 35 13 -23 18 34 -0.08 -115 0 0 -23 34 10 20 47 28.2 11 276 66 -23 38 22 -23 29 58 -23 42 29 -23 25 51 -0.08 -114 0 0 -23 40 58 20 47 28.7 10 276 65 -23 45 9 -23 36 46 -23 49 16 -23 32 39 -0.08 -113 0 0 -23 47 18 20 47 29.1 9 276 65 -23 51 29 -23 43 7 -23 55 36 -23 39 0 -0.08 -112 0 0 -23 53 10 20 47 29.5 8 275 64 -23 57 21 -23 48 59 -24 1 28 -23 44 53 -0.08 -111 0 0 -23 58 35 20 47 29.9 7 275 63 -24 2 46 -23 54 24 -24 6 52 -23 50 18 -0.09 -110 0 0 -24 3 31 20 47 30.2 6 274 62 -24 7 42 -23 59 20 -24 11 48 -23 55 14 -0.09 -109 0 0 -24 8 0 20 47 30.5 5 274 61 -24 12 10 -24 3 49 -24 16 16 -23 59 43 -0.09 -108 0 0 -24 12 1 20 47 30.7 4 274 60 -24 16 11 -24 7 50 -24 20 17 -24 3 45 -0.09 -107 0 0 -24 15 34 20 47 30.9 3 273 59 -24 19 44 -24 11 23 -24 23 49 -24 7 18 -0.09 -106 0 0 -24 18 39 20 47 31.0 2 273 59 -24 22 49 -24 14 29 -24 26 55 -24 10 23 -0.10 -105 0 0 -24 21 17 20 47 31.1 1 272 58 -24 25 27 -24 17 7 -24 29 32 -24 13 1 -0.11 -104 0 0 -24 23 27 20 47 31.2 1 272 57 -24 27 37 -24 19 17 -24 31 42 -24 15 11 -0.16 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: TYC 237-00827-1 * constellation : Sextans * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 09 50 41.9438 DE: +01 41 55.262 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 09 50 41.9439 DE: +01 41 55.262 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 10.1 * B mag [mag]: 10.6 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (28005) 1997 XC asteroid class: approx. diameter [km]: 15 approx. diameter ["]: 0.008 distance from Earth [AU]: 2.68740 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#38 date of fit: 2023 Feb 10 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): 0.025", 0.003", 112.81° remarks: * orbital elements for (28005)1997 XC : Mean anomaly = 0.0944020100 deg Arg. of pericenter = 245.6929666469 deg Long. of node = 242.3037083537 deg Inclination = 13.6227660756 deg Eccentricity = 0.2434093984 Semimajor axis = 3.0645449021 AU Perihelion dist = 2.3186058711 AU Mag: H = 12.98, G = 0.15 Epoch of elements : MJD 60602.86431542 TDT (2024 Oct 19.8643) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#382023Feb10,0.42,2024,10,19,20.743573,0.035968,0.065191,18.075079,-9.832653,-0.004582,0.001076,-0.000001,0.000000 168.0250,1.5853,-134.95,-10.39,False TYC 237-00827-1,9.84498435,1.6986842,10.58,10.10,9.84,0.1,0,,9.86609421,1.5853420,7.90,7.71,0,0,0 28005,1997 XC,18.00,15.328,2.6874,0,0,3.945,-32.18,,5.0,0 0,359.9356,2024,10,19,245.6930,242.3037,13.6228,0.24341,3.06454,2.31861,12.98,5.0,0.15 1.491,0.0253,0.0029,113,0.0038,Known errors,1.01,0,-1,-1 20241019_0827-1,60140.65 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:31 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org