IOTA/IOTA-ES occultation update for (433) Eros / UCAC4 300-202533 event on 2023 Feb 06, 11:34 UT Visible from Summary ------- On 2023 Feb 06 UT, the 17.1 km diameter asteroid (433) Eros will occult a 11.9 mag star in the constellation Sagittarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 2.49 mag to 14.24 mag (the magnitude of the asteroid) for at most 0.430 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: 99 * date and approx. time of event: 2023 Feb 06, 11:32 - 2023 Feb 06, 11:36 * geocentric midpoint of event [JD]: 2459981.98230987 * magnitude of target star: 11.87 * magnitude drop [mag]: 2.49 * estimated maximum duration [s]: 0.430 * Moon: 99 % sunlit, 129° distance * Sun: 44° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 19 * 1 sigma uncertainty interval [path widths]: +/- 0.27 * 1 sigma uncertainty interval [seconds]: +/- 0.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.003, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.004", 0.003", 118°) * approx speed of asteroid's shadow [km/s]: 39.6415 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 300-202533 by 433 Eros on 2023 Feb 6 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 -112 0 0 20 18 9 11 32 7.9 1 123 -35 20 12 2 20 24 16 20 8 48 20 27 31 .... -111 0 0 19 42 24 11 32 8.0 2 123 -34 19 36 18 19 48 30 19 33 4 19 51 45 -0.24 -110 0 0 19 6 49 11 32 8.1 3 123 -33 19 0 44 19 12 55 18 57 31 19 16 9 -0.34 -109 0 0 18 31 26 11 32 8.3 4 124 -32 18 25 21 18 37 30 18 22 9 18 40 44 -0.38 -108 0 0 17 56 14 11 32 8.6 5 124 -31 17 50 11 18 2 18 17 46 59 18 5 31 -0.41 -107 0 0 17 21 16 11 32 8.9 6 124 -30 17 15 14 17 27 19 17 12 2 17 30 32 -0.42 -106 0 0 16 46 33 11 32 9.4 7 125 -29 16 40 32 16 52 35 16 37 20 16 55 47 -0.43 -105 0 0 16 12 6 11 32 9.8 9 125 -28 16 6 5 16 18 6 16 2 54 16 21 18 -0.44 -104 0 0 15 37 55 11 32 10.4 10 125 -27 15 31 55 15 43 54 15 28 45 15 47 5 -0.45 -103 0 0 15 4 1 11 32 11.0 11 125 -26 14 58 3 15 10 0 14 54 53 15 13 10 -0.45 -102 0 0 14 30 27 11 32 11.7 12 126 -25 14 24 30 14 36 25 14 21 21 14 39 34 -0.46 -101 0 0 13 57 12 11 32 12.5 13 126 -24 13 51 16 14 3 9 13 48 8 14 6 18 -0.46 -100 0 0 13 24 19 11 32 13.3 14 126 -23 13 18 24 13 30 14 13 15 16 13 33 23 -0.46 - 99 0 0 12 51 46 11 32 14.2 15 127 -22 12 45 53 12 57 41 12 42 45 13 0 49 -0.47 - 98 0 0 12 19 37 11 32 15.1 16 127 -21 12 13 44 12 25 30 12 10 37 12 28 37 -0.47 - 97 0 0 11 47 50 11 32 16.1 17 127 -20 11 41 59 11 53 42 11 38 52 11 56 49 -0.47 - 96 0 0 11 16 28 11 32 17.2 19 127 -19 11 10 38 11 22 19 11 7 32 11 25 25 -0.47 - 95 0 0 10 45 31 11 32 18.3 20 128 -18 10 39 42 10 51 21 10 36 37 10 54 27 -0.47 - 94 0 0 10 15 0 11 32 19.5 21 128 -16 10 9 12 10 20 49 10 6 7 10 23 54 -0.48 - 93 0 0 9 44 55 11 32 20.8 22 128 -15 9 39 8 9 50 43 9 36 4 9 53 47 -0.48 - 92 0 0 9 15 18 11 32 22.1 23 128 -14 9 9 32 9 21 4 9 6 28 9 24 8 -0.48 - 91 0 0 8 46 8 11 32 23.5 24 129 -13 8 40 23 8 51 53 8 37 21 8 54 56 -0.48 - 90 0 0 8 17 27 11 32 24.9 25 129 -12 8 11 43 8 23 11 8 8 41 8 26 13 -0.48 - 89 0 0 7 49 15 11 32 26.4 26 129 -11 7 43 32 7 54 57 7 40 31 7 57 59 -0.48 - 88 0 0 7 21 32 11 32 28.0 27 129 -10 7 15 51 7 27 14 7 12 50 7 30 15 -0.48 - 87 0 0 6 54 20 11 32 29.6 28 130 -9 6 48 40 7 0 0 6 45 39 7 3 1 -0.48 - 86 0 0 6 27 38 11 32 31.2 29 130 -8 6 21 59 6 33 18 6 18 59 6 36 18 -0.48 - 85 0 0 6 1 28 11 32 32.9 30 130 -7 5 55 50 6 7 6 5 52 51 6 10 6 -0.49 - 84 0 0 5 35 49 11 32 34.7 31 131 -6 5 30 12 5 41 26 5 27 13 5 44 25 -0.49 - 83 0 0 5 10 42 11 32 36.5 32 131 -5 5 5 6 5 16 18 5 2 8 5 19 17 -0.49 - 82 0 0 4 46 8 11 32 38.3 33 131 -4 4 40 33 4 51 43 4 37 36 4 54 41 -0.49 - 81 0 0 4 22 6 11 32 40.2 34 131 -2 4 16 32 4 27 40 4 13 36 4 30 37 -0.49 - 80 0 0 3 58 38 11 32 42.2 35 132 -1 3 53 5 4 4 11 3 50 9 4 7 7 -0.49 - 79 0 0 3 35 43 11 32 44.1 36 132 0 3 30 11 3 41 15 3 27 15 3 44 11 -0.49 - 78 0 0 3 13 22 11 32 46.2 37 133 1 3 7 51 3 18 52 3 4 56 3 21 48 -0.49 - 77 0 0 2 51 34 11 32 48.2 38 133 2 2 46 5 2 57 4 2 43 10 2 59 59 -0.49 - 76 0 0 2 30 21 11 32 50.3 39 133 3 2 24 53 2 35 50 2 21 59 2 38 45 -0.49 - 75 0 0 2 9 43 11 32 52.5 40 134 4 2 4 15 2 15 11 2 1 22 2 18 5 -0.49 - 74 0 0 1 49 39 11 32 54.7 41 134 5 1 44 12 1 55 6 1 41 19 1 58 0 -0.49 - 73 0 0 1 30 10 11 32 56.9 42 135 6 1 24 45 1 35 36 1 21 52 1 38 30 -0.49 - 72 0 0 1 11 17 11 32 59.1 43 135 7 1 5 52 1 16 42 1 3 0 1 19 34 -0.49 - 71 0 0 0 52 58 11 33 1.4 44 136 8 0 47 34 0 58 23 0 44 42 1 1 15 -0.49 - 70 0 0 0 35 15 11 33 3.7 45 136 9 0 29 52 0 40 39 0 27 1 0 43 30 -0.49 - 69 0 0 0 18 8 11 33 6.1 46 137 10 0 12 45 0 23 30 0 9 54 0 26 21 -0.49 - 68 0 0 0 1 36 11 33 8.5 47 137 11 - 0 3 46 0 6 58 - 0 6 36 0 9 48 -0.49 - 67 0 0 - 0 14 20 11 33 10.9 48 138 12 - 0 19 41 - 0 8 59 - 0 22 31 - 0 6 9 -0.50 - 66 0 0 - 0 29 41 11 33 13.3 49 138 13 - 0 35 1 - 0 24 20 - 0 37 51 - 0 21 30 -0.50 - 65 0 0 - 0 44 25 11 33 15.8 49 139 14 - 0 49 45 - 0 39 6 - 0 52 34 - 0 36 16 -0.50 - 64 0 0 - 0 58 34 11 33 18.3 50 140 15 - 1 3 52 - 0 53 15 - 1 6 41 - 0 50 25 -0.50 - 63 0 0 - 1 12 6 11 33 20.8 51 141 17 - 1 17 24 - 1 6 48 - 1 20 12 - 1 3 59 -0.50 - 62 0 0 - 1 25 2 11 33 23.3 52 141 18 - 1 30 19 - 1 19 44 - 1 33 8 - 1 16 56 -0.50 - 61 0 0 - 1 37 22 11 33 25.9 53 142 19 - 1 42 39 - 1 32 5 - 1 45 27 - 1 29 17 -0.50 - 60 0 0 - 1 49 6 11 33 28.5 53 143 20 - 1 54 22 - 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2 12 49 - 2 2 18 - 2 15 36 - 1 59 30 -0.50 - 23 0 0 - 1 56 51 11 35 11.3 59 202 55 - 2 2 6 - 1 51 34 - 2 4 54 - 1 48 47 -0.50 - 22 0 0 - 1 45 31 11 35 14.0 59 204 56 - 1 50 48 - 1 40 15 - 1 53 35 - 1 37 27 -0.50 - 21 0 0 - 1 33 36 11 35 16.8 58 205 57 - 1 38 53 - 1 28 19 - 1 41 41 - 1 25 30 -0.50 - 20 0 0 - 1 21 4 11 35 19.5 57 206 57 - 1 26 22 - 1 15 46 - 1 29 10 - 1 12 57 -0.50 - 19 0 0 - 1 7 56 11 35 22.2 57 208 58 - 1 13 14 - 1 2 37 - 1 16 3 - 0 59 48 -0.50 - 18 0 0 - 0 54 12 11 35 25.0 56 209 59 - 0 59 31 - 0 48 52 - 1 2 20 - 0 46 3 -0.50 - 17 0 0 - 0 39 51 11 35 27.7 55 210 60 - 0 45 11 - 0 34 31 - 0 48 0 - 0 31 41 -0.50 - 16 0 0 - 0 24 55 11 35 30.3 55 211 60 - 0 30 15 - 0 19 34 - 0 33 5 - 0 16 44 -0.50 - 15 0 0 - 0 9 22 11 35 33.0 54 212 61 - 0 14 43 - 0 4 1 - 0 17 33 - 0 1 10 -0.50 - 14 0 0 0 6 46 11 35 35.6 53 213 62 0 1 24 0 12 9 - 0 1 26 0 15 0 -0.50 - 13 0 0 0 23 31 11 35 38.3 52 214 63 0 18 8 0 28 54 0 15 17 0 31 45 -0.50 - 12 0 0 0 40 51 11 35 40.9 52 215 63 0 35 27 0 46 15 0 32 36 0 49 6 -0.50 - 11 0 0 0 58 46 11 35 43.4 51 216 64 0 53 22 1 4 11 0 50 30 1 7 3 -0.50 - 10 0 0 1 17 17 11 35 46.0 50 216 64 1 11 52 1 22 43 1 9 0 1 25 36 -0.50 - 9 0 0 1 36 24 11 35 48.5 49 217 65 1 30 57 1 41 50 1 28 5 1 44 43 -0.50 - 8 0 0 1 56 5 11 35 51.0 48 218 65 1 50 38 2 1 33 1 47 45 2 4 26 -0.50 - 7 0 0 2 16 22 11 35 53.5 47 218 66 2 10 54 2 21 50 2 8 0 2 24 44 -0.50 - 6 0 0 2 37 13 11 35 55.9 46 219 66 2 31 44 2 42 43 2 28 50 2 45 37 -0.50 - 5 0 0 2 58 39 11 35 58.4 45 220 67 2 53 9 3 4 9 2 50 14 3 7 5 -0.50 - 4 0 0 3 20 39 11 36 0.7 45 220 67 3 15 8 3 26 11 3 12 13 3 29 6 -0.50 - 3 0 0 3 43 14 11 36 3.1 44 221 67 3 37 41 3 48 46 3 34 46 3 51 42 -0.50 - 2 0 0 4 6 22 11 36 5.4 43 221 67 4 0 49 4 11 55 3 57 52 4 14 52 -0.50 - 1 0 0 4 30 3 11 36 7.7 42 222 67 4 24 29 4 35 38 4 21 32 4 38 35 -0.50 0 0 0 4 54 18 11 36 9.9 41 222 67 4 48 43 4 59 54 4 45 45 5 2 52 -0.50 1 0 0 5 19 6 11 36 12.1 40 223 67 5 13 29 5 24 42 5 10 31 5 27 41 -0.50 2 0 0 5 44 26 11 36 14.3 39 223 67 5 38 48 5 50 3 5 35 49 5 53 3 -0.50 3 0 0 6 10 18 11 36 16.4 38 224 67 6 4 39 6 15 57 6 1 40 6 18 56 -0.50 4 0 0 6 36 41 11 36 18.5 37 224 67 6 31 2 6 42 21 6 28 2 6 45 22 -0.50 5 0 0 7 3 36 11 36 20.5 36 225 67 6 57 55 7 9 17 6 54 55 7 12 18 -0.50 6 0 0 7 31 2 11 36 22.5 35 225 67 7 25 20 7 36 44 7 22 19 7 39 46 -0.50 7 0 0 7 58 57 11 36 24.4 34 225 66 7 53 14 8 4 41 7 50 13 8 7 43 -0.50 8 0 0 8 27 23 11 36 26.3 33 226 66 8 21 39 8 33 7 8 18 36 8 36 10 -0.50 9 0 0 8 56 17 11 36 28.2 32 226 65 8 50 32 9 2 3 8 47 29 9 5 6 -0.50 10 0 0 9 25 40 11 36 30.0 30 227 65 9 19 53 9 31 27 9 16 50 9 34 31 -0.50 11 0 0 9 55 30 11 36 31.7 29 227 64 9 49 43 10 1 18 9 46 38 10 4 23 -0.50 12 0 0 10 25 48 11 36 33.4 28 227 64 10 19 59 10 31 37 10 16 54 10 34 42 -0.50 13 0 0 10 56 32 11 36 35.0 27 228 63 10 50 42 11 2 22 10 47 36 11 5 28 -0.50 14 0 0 11 27 42 11 36 36.6 26 228 63 11 21 50 11 33 33 11 18 44 11 36 39 -0.50 15 0 0 11 59 16 11 36 38.1 25 228 62 11 53 24 12 5 9 11 50 17 12 8 16 -0.50 16 0 0 12 31 15 11 36 39.6 24 229 61 12 25 21 12 37 8 12 22 14 12 40 16 -0.50 17 0 0 13 3 36 11 36 41.0 23 229 60 12 57 42 13 9 31 12 54 34 13 12 40 -0.50 18 0 0 13 36 21 11 36 42.3 22 229 60 13 30 25 13 42 17 13 27 16 13 45 25 -0.50 19 0 0 14 9 26 11 36 43.6 21 230 59 14 3 29 14 15 23 14 0 20 14 18 33 -0.50 20 0 0 14 42 52 11 36 44.8 20 230 58 14 36 54 14 48 50 14 33 45 14 52 0 -0.50 21 0 0 15 16 38 11 36 45.9 19 230 57 15 10 39 15 22 37 15 7 29 15 25 48 -0.50 22 0 0 15 50 42 11 36 47.0 17 231 56 15 44 42 15 56 42 15 41 31 15 59 53 -0.50 23 0 0 16 25 3 11 36 48.0 16 231 55 16 19 2 16 31 5 16 15 51 16 34 16 -0.50 24 0 0 16 59 41 11 36 49.0 15 231 54 16 53 39 17 5 44 16 50 28 17 8 56 -0.50 25 0 0 17 34 35 11 36 49.9 14 232 53 17 28 32 17 40 38 17 25 19 17 43 51 -0.50 26 0 0 18 9 42 11 36 50.7 13 232 53 18 3 38 18 15 46 18 0 26 18 19 0 -0.50 27 0 0 18 45 3 11 36 51.5 12 232 52 18 38 58 18 51 8 18 35 45 18 54 22 -0.50 28 0 0 19 20 35 11 36 52.1 11 233 51 19 14 30 19 26 41 19 11 16 19 29 56 -0.50 29 0 0 19 56 19 11 36 52.8 10 233 50 19 50 12 20 2 25 19 46 58 20 5 40 -0.50 30 0 0 20 32 11 11 36 53.3 9 233 49 20 26 4 20 38 19 20 22 49 20 41 34 -0.51 31 0 0 21 8 13 11 36 53.8 7 234 48 21 2 4 21 14 21 20 58 49 21 17 37 -0.51 32 0 0 21 44 21 11 36 54.2 6 234 47 21 38 12 21 50 30 21 34 56 21 53 46 -0.51 33 0 0 22 20 35 11 36 54.6 5 234 46 22 14 25 22 26 45 22 11 9 22 30 1 -0.51 34 0 0 22 56 54 11 36 54.8 4 235 45 22 50 43 23 3 4 22 47 27 23 6 21 -0.51 35 0 0 23 33 16 11 36 55.0 3 235 44 23 27 5 23 39 27 23 23 48 23 42 44 -0.52 36 0 0 24 9 40 11 36 55.2 2 236 43 24 3 28 24 15 52 24 0 11 24 19 9 -0.53 37 0 0 24 46 5 11 36 55.3 1 236 41 24 39 53 24 52 17 24 36 36 24 55 35 -0.58 Uncertainty in time = +/- 0 secs Prediction of 2022 Aug 13.9 Data for the target star ------------------------ * name: UCAC4 300-202533 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 15 02.7417 DE: -30 08 33.215 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 15 02.7417 DE: -30 08 33.215 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.9 * B mag [mag]: 12.6 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (433) Eros asteroid class: approx. diameter [km]: 17 approx. diameter ["]: 0.011 distance from Earth [AU]: 2.13030 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#659 date of fit: 2021 May 24 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): 0.004", 0.003", 118.167° remarks: * orbital elements for (433)Eros : Mean anomaly = 100.4103794006 deg Arg. of pericenter = 178.9285070696 deg Long. of node = 304.2874821586 deg Inclination = 10.8277612259 deg Eccentricity = 0.2227751868 Semimajor axis = 1.4581415939 AU Perihelion dist = 1.1333038278 AU Mag: H = 10.31, G = 0.46 Epoch of elements : MJD 59981.48230954 TDT (2023 Feb 06.4823) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#6592021May24,0.43,2023,2,6,11.575437,-0.021152,0.448095,22.350122,1.049783,-0.003213,-0.000490,-0.000001,0.000000 -35.8551,-30.1355,9.87,-15.62,False UCAC4 300-202533,18.25076150,-30.1425599,12.64,11.87,11.45,0.0,0,,18.27495032,-30.1354530,2.49,2.46,0,0,0 433,Eros,14.24,17.1,2.1303,0,0,7.113,4.34,,0.2 0,100.1404,2023,2,6,178.9285,304.2875,10.8278,0.22278,1.45814,1.13330,10.43,5.0,0.15 1.265,0.0037,0.0026,118,0.0029,Known errors,-1.00,-1,-1,-1 20230206_202533,59804.87 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Aug 13, 20:51 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org