IOTA/IOTA-ES occultation update for (2207) Antenor / UCAC4 372-175323 event on 2022 Nov 21, 11:40 UT Visible from Summary ------- On 2022 Nov 21 UT, the 90.5 km diameter asteroid (2207) Antenor will occult a 12.0 mag star in the constellation Capricornus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.97 mag to 16.95 mag (the magnitude of the asteroid) for at most 3.960 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: 2022 Nov 21, 11:36 - 2022 Nov 21, 11:43 * geocentric midpoint of event [JD]: 2459904.98598088 * magnitude of target star: 11.99 * magnitude drop [mag]: 4.97 * estimated maximum duration [s]: 3.960 * Moon: 8 % sunlit, 104° distance * Sun: 71° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 137 * 1 sigma uncertainty interval [path widths]: +/- 0.23 * 1 sigma uncertainty interval [seconds]: +/- 2.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.016, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.016", 0.005", 79°) * approx speed of asteroid's shadow [km/s]: 22.8253 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 372-175323 by 2207 Antenor on 2022 Nov 21 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 - 35 0 0 -55 23 35 11 36 44.4 1 117 45 -56 6 7 -54 41 43 -56 26 14 -54 22 22 .... - 34 0 0 -55 41 38 11 36 44.5 1 116 45 -56 24 8 -54 59 48 -56 44 14 -54 40 29 1.01 - 33 0 0 -55 59 29 11 36 44.6 2 116 45 -56 41 57 -55 17 42 -57 2 1 -54 58 23 1.06 - 32 0 0 -56 17 8 11 36 44.8 2 115 46 -56 59 32 -55 35 23 -57 19 36 -55 16 5 1.08 - 31 0 0 -56 34 33 11 36 45.0 3 114 46 -57 16 55 -55 52 51 -57 36 57 -55 33 34 1.10 - 30 0 0 -56 51 45 11 36 45.3 4 113 46 -57 34 4 -56 10 6 -57 54 5 -55 50 51 1.11 - 29 0 0 -57 8 44 11 36 45.6 4 112 46 -57 51 0 -56 27 8 -58 10 59 -56 7 55 1.11 - 28 0 0 -57 25 30 11 36 46.0 5 111 46 -58 7 42 -56 43 57 -58 27 39 -56 24 45 1.12 - 27 0 0 -57 42 1 11 36 46.4 6 110 47 -58 24 10 -57 0 32 -58 44 5 -56 41 22 1.12 - 26 0 0 -57 58 19 11 36 46.9 6 110 47 -58 40 24 -57 16 53 -59 0 17 -56 57 44 1.12 - 25 0 0 -58 14 23 11 36 47.4 7 109 47 -58 56 23 -57 33 1 -59 16 15 -57 13 54 1.13 - 24 0 0 -58 30 12 11 36 47.9 7 108 47 -59 12 8 -57 48 54 -59 31 58 -57 29 48 1.13 - 23 0 0 -58 45 47 11 36 48.5 8 107 47 -59 27 39 -58 4 33 -59 47 26 -57 45 29 1.13 - 22 0 0 -59 1 7 11 36 49.1 8 106 47 -59 42 54 -58 19 57 -60 2 40 -58 0 56 1.13 - 21 0 0 -59 16 12 11 36 49.8 9 105 47 -59 57 55 -58 35 7 -60 17 38 -58 16 8 1.13 - 20 0 0 -59 31 3 11 36 50.5 10 104 47 -60 12 41 -58 50 2 -60 32 22 -58 31 5 1.13 - 19 0 0 -59 45 39 11 36 51.2 10 104 47 -60 27 12 -59 4 43 -60 46 51 -58 45 48 1.13 - 18 0 0 -60 0 0 11 36 51.9 11 103 47 -60 41 28 -59 19 9 -61 1 4 -59 0 15 1.14 - 17 0 0 -60 14 6 11 36 52.7 11 102 47 -60 55 29 -59 33 19 -61 15 3 -59 14 28 1.14 - 16 0 0 -60 27 57 11 36 53.5 12 101 47 -61 9 15 -59 47 15 -61 28 46 -59 28 27 1.14 - 15 0 0 -60 41 33 11 36 54.4 12 100 47 -61 22 45 -60 0 56 -61 42 14 -59 42 10 1.14 - 14 0 0 -60 54 53 11 36 55.2 13 99 47 -61 36 1 -60 14 22 -61 55 27 -59 55 38 1.14 - 13 0 0 -61 7 59 11 36 56.1 13 98 47 -61 49 1 -60 27 33 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36 48 -66 12 4 -64 19 6 1.14 13 0 0 -65 21 51 11 37 26.5 25 73 44 -66 0 31 -64 43 41 -66 18 45 -64 26 1 1.14 14 0 0 -65 28 25 11 37 27.8 25 72 44 -66 7 1 -64 50 20 -66 25 13 -64 32 42 1.14 15 0 0 -65 34 47 11 37 29.2 25 71 44 -66 13 18 -64 56 46 -66 31 28 -64 39 10 1.14 16 0 0 -65 40 55 11 37 30.6 26 70 43 -66 19 21 -65 2 59 -66 37 29 -64 45 25 1.14 17 0 0 -65 46 50 11 37 31.9 26 69 43 -66 25 12 -65 8 58 -66 43 18 -64 51 26 1.14 18 0 0 -65 52 32 11 37 33.3 26 68 43 -66 30 49 -65 14 44 -66 48 54 -64 57 13 1.14 19 0 0 -65 58 1 11 37 34.7 27 67 43 -66 36 14 -65 20 16 -66 54 16 -65 2 48 1.14 20 0 0 -66 3 17 11 37 36.2 27 66 42 -66 41 26 -65 25 36 -66 59 26 -65 8 10 1.14 21 0 0 -66 8 20 11 37 37.6 28 65 42 -66 46 25 -65 30 43 -67 4 24 -65 13 18 1.14 22 0 0 -66 13 10 11 37 39.0 28 64 42 -66 51 12 -65 35 37 -67 9 8 -65 18 13 1.14 23 0 0 -66 17 47 11 37 40.5 28 63 42 -66 55 46 -65 40 18 -67 13 41 -65 22 56 1.14 24 0 0 -66 22 12 11 37 41.9 28 62 41 -67 0 7 -65 44 46 -67 18 1 -65 27 26 1.14 25 0 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1.19 161 0 0 -43 17 46 11 42 38.9 14 262 -24 -43 59 22 -42 36 48 -44 19 1 -42 17 52 1.19 162 0 0 -42 57 9 11 42 40.4 13 261 -25 -43 38 39 -42 16 15 -43 58 16 -41 57 21 1.19 163 0 0 -42 36 38 11 42 41.8 13 260 -25 -43 18 3 -41 55 50 -43 37 38 -41 36 58 1.20 164 0 0 -42 16 15 11 42 43.1 12 260 -26 -42 57 36 -41 35 32 -43 17 8 -41 16 42 1.20 165 0 0 -41 56 1 11 42 44.3 11 259 -27 -42 37 16 -41 15 23 -42 56 45 -40 56 35 1.21 166 0 0 -41 35 56 11 42 45.4 10 258 -27 -42 17 6 -40 55 23 -42 36 32 -40 36 38 1.21 167 0 0 -41 16 1 11 42 46.5 10 258 -28 -41 57 5 -40 35 33 -42 16 29 -40 16 50 1.22 168 0 0 -40 56 16 11 42 47.4 9 257 -28 -41 37 14 -40 15 53 -41 56 36 -39 57 12 1.22 169 0 0 -40 36 41 11 42 48.3 8 256 -29 -41 17 34 -39 56 24 -41 36 53 -39 37 46 1.23 170 0 0 -40 17 19 11 42 49.1 7 256 -29 -40 58 6 -39 37 6 -41 17 22 -39 18 31 1.24 171 0 0 -39 58 8 11 42 49.9 6 255 -30 -40 38 50 -39 18 1 -40 58 3 -38 59 28 1.25 172 0 0 -39 39 9 11 42 50.5 5 254 -30 -40 19 46 -38 59 8 -40 38 56 -38 40 37 1.27 173 0 0 -39 20 24 11 42 51.0 5 254 -30 -40 0 55 -38 40 28 -40 20 3 -38 22 0 1.29 174 0 0 -39 1 52 11 42 51.5 4 253 -31 -39 42 17 -38 22 2 -40 1 23 -38 3 36 1.32 175 0 0 -38 43 35 11 42 51.9 3 252 -31 -39 23 54 -38 3 50 -39 42 57 -37 45 27 1.38 176 0 0 -38 25 32 11 42 52.1 2 252 -32 -39 5 46 -37 45 52 -39 24 45 -37 27 31 1.47 177 0 0 -38 7 44 11 42 52.3 1 251 -32 -38 47 52 -37 28 10 -39 6 49 -37 9 51 1.69 178 0 0 -37 50 12 11 42 52.4 0 250 -32 -38 30 14 -37 10 43 -38 49 8 -36 52 27 2.87 Uncertainty in time = +/- 3 secs Prediction of 2022 Oct 2.0 Data for the target star ------------------------ * name: UCAC4 372-175323 * constellation : Capricornus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 20 47 38.8375 DE: -15 42 43.421 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 20 47 38.8373 DE: -15 42 43.422 * position source: Gaia EDR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 12.0 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2207) Antenor asteroid class: approx. diameter [km]: 91 approx. diameter ["]: 0.023 distance from Earth [AU]: 5.45240 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#53 date of fit: 2022 Sep 23 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): 0.016", 0.005", 79.15° remarks: * orbital elements for (2207)Antenor : Mean anomaly = 217.8851916542 deg Arg. of pericenter = 304.2129138020 deg Long. of node = 159.0281387299 deg Inclination = 6.8024970176 deg Eccentricity = 0.0124524686 Semimajor axis = 5.1686822850 AU Perihelion dist = 5.1043194312 AU Mag: H = 9.01, G = 0.15 Epoch of elements : MJD 59904.48611111 TDT (2022 Nov 21.4861) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#532022Sep23,3.96,2022,11,21,11.663541,0.125265,-0.739622,12.708171,2.116723,0.005607,0.001630,0.000000,0.000000 76.8178,-15.6293,1.51,-19.96,False UCAC4 372-175323,20.79412150,-15.7120616,0.00,11.99,0.00,0.0,0,,20.81509246,-15.6293208,4.97,0.00,0,0,0 2207,Antenor,16.95,90.5,5.4524,0,0,1.419,3.42,,5.8,0 0,217.8444,2022,11,21,304.2129,159.0281,6.8025,0.01245,5.16868,5.10432,9.02,5.0,0.15 1.234,0.0160,0.0053,79,0.0053,Known errors,-1.00,-1,-1,-1 20221121_175323,59854.01 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Oct 02, 00:08 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org