IOTA/IOTA-ES occultation update for (920) Rogeria / UCAC4 384-080836 event on 2024 Oct 20, 23:23 UT Visible from Summary ------- On 2024 Oct 20 UT, the 26.2816199554859 km diameter asteroid (920) Rogeria will occult a 11.8 mag star in the constellation Serpens for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.30 mag to 17.08 mag (the magnitude of the asteroid) for at most 0.770 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: 2024 Oct 20, 23:19 - 2024 Oct 20, 23:26 * geocentric midpoint of event [JD]: 2460604.47430600 * magnitude of target star: 11.79 * magnitude drop [mag]: 5.30 * estimated maximum duration [s]: 0.770 * Moon: 83 % sunlit, 164° distance * Sun: 54° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 27 * 1 sigma uncertainty interval [path widths]: +/- 0.24 * 1 sigma uncertainty interval [seconds]: +/- 0.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.007, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.007", 0.002", 90°) * approx speed of asteroid's shadow [km/s]: 34.3334 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 384-080836 by 920 Rogeria on 2024 Oct 20 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 154 0 0 10 57 48 23 19 54.6 0 104 51 10 50 23 11 5 12 10 46 48 11 8 47 .... 155 0 0 10 43 26 23 19 54.6 1 104 52 10 36 2 10 50 51 10 32 27 10 54 26 0.06 156 0 0 10 28 55 23 19 54.7 2 104 53 10 21 30 10 36 20 10 17 55 10 39 56 0.01 157 0 0 10 14 15 23 19 54.9 3 104 54 10 6 49 10 21 40 10 3 14 10 25 15 -0.01 158 0 0 9 59 25 23 19 55.1 4 104 55 9 51 59 10 6 50 9 48 24 10 10 26 -0.02 159 0 0 9 44 25 23 19 55.4 5 104 56 9 37 0 9 51 51 9 33 24 9 55 27 -0.02 160 0 0 9 29 17 23 19 55.7 6 105 57 9 21 51 9 36 43 9 18 16 9 40 19 -0.03 161 0 0 9 14 1 23 19 56.1 7 105 58 9 6 34 9 21 27 9 2 59 9 25 3 -0.03 162 0 0 8 58 36 23 19 56.5 8 105 59 8 51 9 9 6 2 8 47 33 9 9 38 -0.03 163 0 0 8 43 3 23 19 57.0 9 105 60 8 35 36 8 50 29 8 32 0 8 54 6 -0.03 164 0 0 8 27 22 23 19 57.6 10 105 61 8 19 55 8 34 49 8 16 19 8 38 25 -0.03 165 0 0 8 11 34 23 19 58.2 11 105 62 8 4 7 8 19 1 8 0 31 8 22 37 -0.03 166 0 0 7 55 39 23 19 58.9 12 106 63 7 48 11 8 3 6 7 44 35 8 6 43 -0.03 167 0 0 7 39 37 23 19 59.6 13 106 63 7 32 9 7 47 4 7 28 33 7 50 41 -0.04 168 0 0 7 23 28 23 20 0.4 14 106 64 7 16 1 7 30 56 7 12 24 7 34 33 -0.04 169 0 0 7 7 13 23 20 1.3 15 106 65 6 59 46 7 14 41 6 56 9 7 18 18 -0.04 170 0 0 6 50 53 23 20 2.2 16 106 66 6 43 25 6 58 21 6 39 48 7 1 58 -0.04 171 0 0 6 34 27 23 20 3.2 17 106 67 6 26 59 6 41 55 6 23 22 6 45 32 -0.04 172 0 0 6 17 56 23 20 4.2 19 106 68 6 10 27 6 25 24 6 6 50 6 29 1 -0.04 173 0 0 6 1 19 23 20 5.3 20 106 69 5 53 51 6 8 48 5 50 14 6 12 25 -0.04 174 0 0 5 44 39 23 20 6.5 21 106 70 5 37 10 5 52 7 5 33 33 5 55 44 -0.04 175 0 0 5 27 54 23 20 7.7 22 107 70 5 20 25 5 35 23 5 16 48 5 39 0 -0.04 176 0 0 5 11 5 23 20 9.0 23 107 71 5 3 36 5 18 34 4 59 59 5 22 11 -0.04 177 0 0 4 54 13 23 20 10.3 24 107 72 4 46 44 5 1 42 4 43 7 5 5 19 -0.04 178 0 0 4 37 18 23 20 11.7 25 107 73 4 29 49 4 44 47 4 26 12 4 48 24 -0.04 179 0 0 4 20 20 23 20 13.1 26 107 73 4 12 51 4 27 49 4 9 14 4 31 26 -0.04 -180 0 0 4 3 20 23 20 14.6 27 107 74 3 55 50 4 10 49 3 52 13 4 14 26 -0.04 -179 0 0 3 46 17 23 20 16.2 28 107 75 3 38 48 3 53 46 3 35 11 3 57 24 -0.04 -178 0 0 3 29 13 23 20 17.8 29 107 75 3 21 44 3 36 42 3 18 7 3 40 20 -0.04 -177 0 0 3 12 8 23 20 19.4 30 107 76 3 4 38 3 19 37 3 1 1 3 23 14 -0.04 -176 0 0 2 55 1 23 20 21.2 31 107 76 2 47 32 3 2 31 2 43 55 3 6 8 -0.04 -175 0 0 2 37 55 23 20 22.9 32 107 77 2 30 25 2 45 24 2 26 48 2 49 1 -0.04 -174 0 0 2 20 47 23 20 24.8 33 108 77 2 13 18 2 28 17 2 9 41 2 31 54 -0.04 -173 0 0 2 3 41 23 20 26.6 34 108 77 1 56 11 2 11 10 1 52 34 2 14 47 -0.04 -172 0 0 1 46 34 23 20 28.6 35 108 77 1 39 5 1 54 3 1 35 28 1 57 41 -0.04 -171 0 0 1 29 29 23 20 30.6 36 108 77 1 22 0 1 36 58 1 18 22 1 40 35 -0.04 -170 0 0 1 12 25 23 20 32.6 37 108 77 1 4 56 1 19 54 1 1 18 1 23 31 -0.04 -169 0 0 0 55 22 23 20 34.7 38 108 77 0 47 53 1 2 51 0 44 16 1 6 29 -0.04 -168 0 0 0 38 22 23 20 36.8 39 108 77 0 30 53 0 45 51 0 27 16 0 49 28 -0.04 -167 0 0 0 21 24 23 20 39.0 40 108 77 0 13 55 0 28 53 0 10 18 0 32 30 -0.04 -166 0 0 0 4 29 23 20 41.2 41 108 77 - 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7 45 12 - 8 3 28 - 7 41 39 -0.04 - 38 0 0 - 7 40 5 23 26 3.3 9 258 -44 - 7 47 27 - 7 32 43 - 7 51 0 - 7 29 10 -0.04 - 37 0 0 - 7 27 24 23 26 3.8 8 258 -45 - 7 34 46 - 7 20 2 - 7 38 20 - 7 16 28 -0.04 - 36 0 0 - 7 14 32 23 26 4.2 7 257 -46 - 7 21 54 - 7 7 9 - 7 25 28 - 7 3 35 -0.04 - 35 0 0 - 7 1 27 23 26 4.6 6 257 -47 - 7 8 50 - 6 54 5 - 7 12 24 - 6 50 31 -0.04 - 34 0 0 - 6 48 12 23 26 4.9 5 257 -48 - 6 55 34 - 6 40 49 - 6 59 9 - 6 37 15 -0.03 - 33 0 0 - 6 34 45 23 26 5.2 4 257 -49 - 6 42 8 - 6 27 22 - 6 45 42 - 6 23 47 -0.03 - 32 0 0 - 6 21 7 23 26 5.4 3 257 -50 - 6 28 30 - 6 13 44 - 6 32 5 - 6 10 9 -0.03 - 31 0 0 - 6 7 19 23 26 5.6 2 257 -51 - 6 14 42 - 5 59 55 - 6 18 17 - 5 56 20 -0.02 - 30 0 0 - 5 53 20 23 26 5.7 1 257 -52 - 6 0 44 - 5 45 56 - 6 4 18 - 5 42 21 0.01 - 29 0 0 - 5 39 11 23 26 5.7 0 257 -53 - 5 46 35 - 5 31 47 - 5 50 10 - 5 28 12 0.78 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 384-080836 * constellation : Serpens * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 23 21.0689 DE: -13 14 44.236 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 23 21.0689 DE: -13 14 44.236 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.8 * B mag [mag]: 12.6 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (920) Rogeria asteroid class: approx. diameter [km]: 26 approx. diameter ["]: 0.011 distance from Earth [AU]: 3.36950 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#52 date of fit: 2023 Apr 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): 0.007", 0.002", 90.111° remarks: * orbital elements for (920)Rogeria : Mean anomaly = 173.0435224050 deg Arg. of pericenter = 270.4379152589 deg Long. of node = 192.6088073779 deg Inclination = 11.5936800284 deg Eccentricity = 0.1051154762 Semimajor axis = 2.6222974470 AU Perihelion dist = 2.3466534021 AU Mag: H = 11.26, G = 0.15 Epoch of elements : MJD 60603.97430596 TDT (2024 Oct 20.9743) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#522023Apr24,0.77,2024,10,20,23.383344,0.006463,0.047230,19.166660,-2.859049,0.004697,0.000301,-0.000001,0.000000 -119.4738,-13.2687,-174.59,-10.78,False UCAC4 384-080836,17.38918585,-13.2456210,12.59,11.79,11.36,0.1,0,,17.41221943,-13.2686959,5.30,5.28,0,0,0 920,Rogeria,17.08,26.526,3.3695,0,0,3.427,-7.46,,1.4,0 0,172.8174,2024,10,20,270.4379,192.6088,11.5937,0.10512,2.62230,2.34665,11.26,5.0,0.15 1.242,0.0073,0.0024,90,0.0026,Known errors,1.38,0,-1,-1 20241020_080836,60140.65 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:35 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org