IOTA/IOTA-ES occultation update for (1190) Pelagia / UCAC4 316-122357 event on 2024 Sep 22, 18:33 UT Visible from Summary ------- On 2024 Sep 22 UT, the 16.8360829108734 km diameter asteroid (1190) Pelagia will occult a 10.7 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 7.17 mag to 17.91 mag (the magnitude of the asteroid) for at most 1.020 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 Sep 22, 18:27 - 2024 Sep 22, 18:39 * geocentric midpoint of event [JD]: 2460576.27327854 * magnitude of target star: 10.74 * magnitude drop [mag]: 7.17 * estimated maximum duration [s]: 1.020 * Moon: 71 % sunlit, 156° distance * Sun: 89° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 17 * 1 sigma uncertainty interval [path widths]: +/- 0.14 * 1 sigma uncertainty interval [seconds]: +/- 1.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.010, +/- 0.001) * 1 sigma uncertainty ellipse (major, minor, PA): (0.010", 0.001", 92°) * approx speed of asteroid's shadow [km/s]: 16.6329 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 316-122357 by 1190 Pelagia on 2024 Sep 22 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 - 97 0 0 4 43 53 18 27 13.0 1 117 85 4 38 39 4 49 8 4 37 12 4 50 35 .... - 96 0 0 4 13 25 18 27 13.2 2 117 85 4 8 11 4 18 39 4 6 44 4 20 6 -0.01 - 95 0 0 3 43 4 18 27 13.5 3 117 85 3 37 50 3 48 18 3 36 23 3 49 45 -0.07 - 94 0 0 3 12 50 18 27 13.9 4 117 84 3 7 37 3 18 4 3 6 10 3 19 31 -0.09 - 93 0 0 2 42 45 18 27 14.5 5 117 84 2 37 32 2 47 58 2 36 5 2 49 25 -0.11 - 92 0 0 2 12 49 18 27 15.2 6 117 83 2 7 36 2 18 2 2 6 10 2 19 28 -0.12 - 91 0 0 1 43 3 18 27 16.1 7 117 82 1 37 50 1 48 15 1 36 24 1 49 42 -0.12 - 90 0 0 1 13 27 18 27 17.2 8 117 81 1 8 16 1 18 39 1 6 49 1 20 6 -0.13 - 89 0 0 0 44 4 18 27 18.3 10 117 80 0 38 52 0 49 15 0 37 26 0 50 42 -0.13 - 88 0 0 0 14 53 18 27 19.7 11 117 79 0 9 41 0 20 4 0 8 15 0 21 30 -0.13 - 87 0 0 - 0 14 6 18 27 21.1 12 117 78 - 0 19 16 - 0 8 55 - 0 20 42 - 0 7 29 -0.14 - 86 0 0 - 0 42 50 18 27 22.8 13 117 77 - 0 48 0 - 0 37 40 - 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5 11 10 - 5 0 59 - 5 12 35 - 4 59 35 -0.16 37 0 0 - 4 39 59 18 38 28.4 38 239 -48 - 4 45 5 - 4 34 53 - 4 46 29 - 4 33 28 -0.16 38 0 0 - 4 13 32 18 38 33.0 36 239 -49 - 4 18 38 - 4 8 25 - 4 20 3 - 4 7 0 -0.16 39 0 0 - 3 46 45 18 38 37.4 35 239 -50 - 3 51 52 - 3 41 38 - 3 53 17 - 3 40 13 -0.16 40 0 0 - 3 19 39 18 38 41.7 34 239 -51 - 3 24 47 - 3 14 31 - 3 26 12 - 3 13 6 -0.16 41 0 0 - 2 52 14 18 38 45.9 33 240 -52 - 2 57 22 - 2 47 6 - 2 58 48 - 2 45 40 -0.16 42 0 0 - 2 24 31 18 38 49.9 32 240 -54 - 2 29 39 - 2 19 22 - 2 31 5 - 2 17 56 -0.16 43 0 0 - 1 56 30 18 38 53.9 31 240 -55 - 2 1 39 - 1 51 21 - 2 3 5 - 1 49 55 -0.16 44 0 0 - 1 28 12 18 38 57.7 30 240 -56 - 1 33 22 - 1 23 2 - 1 34 48 - 1 21 36 -0.16 45 0 0 - 0 59 38 18 39 1.5 29 240 -57 - 1 4 49 - 0 54 28 - 1 6 15 - 0 53 2 -0.15 46 0 0 - 0 30 49 18 39 5.1 28 240 -58 - 0 36 0 - 0 25 38 - 0 37 26 - 0 24 12 -0.15 47 0 0 - 0 1 45 18 39 8.5 26 240 -59 - 0 6 57 0 3 26 - 0 8 23 0 4 52 -0.15 48 0 0 0 27 33 18 39 11.9 25 240 -60 0 22 21 0 32 44 0 20 54 0 34 11 -0.15 49 0 0 0 57 4 18 39 15.1 24 240 -61 0 51 51 1 2 16 0 50 25 1 3 42 -0.15 50 0 0 1 26 47 18 39 18.1 23 240 -62 1 21 34 1 31 59 1 20 8 1 33 26 -0.15 51 0 0 1 56 42 18 39 21.1 22 240 -63 1 51 29 2 1 55 1 50 2 2 3 22 -0.15 52 0 0 2 26 47 18 39 23.9 21 240 -64 2 21 34 2 32 1 2 20 7 2 33 28 -0.15 53 0 0 2 57 3 18 39 26.5 20 240 -65 2 51 49 3 2 16 2 50 22 3 3 43 -0.15 54 0 0 3 27 27 18 39 29.0 19 240 -66 3 22 13 3 32 41 3 20 46 3 34 8 -0.15 55 0 0 3 58 0 18 39 31.4 18 240 -66 3 52 45 4 3 14 3 51 18 4 4 41 -0.15 56 0 0 4 28 40 18 39 33.6 16 240 -67 4 23 25 4 33 54 4 21 58 4 35 22 -0.15 57 0 0 4 59 26 18 39 35.7 15 240 -68 4 54 11 5 4 41 4 52 44 5 6 8 -0.15 58 0 0 5 30 18 18 39 37.6 14 241 -69 5 25 3 5 35 33 5 23 35 5 37 1 -0.15 59 0 0 6 1 14 18 39 39.4 13 241 -70 5 55 59 6 6 30 5 54 32 6 7 57 -0.15 60 0 0 6 32 15 18 39 41.1 12 241 -71 6 26 59 6 37 30 6 25 32 6 38 58 -0.15 61 0 0 7 3 18 18 39 42.6 11 241 -72 6 58 2 7 8 34 6 56 35 7 10 1 -0.15 62 0 0 7 34 23 18 39 43.9 10 241 -72 7 29 7 7 39 39 7 27 40 7 41 7 -0.15 63 0 0 8 5 29 18 39 45.1 9 241 -73 8 0 13 8 10 45 7 58 46 8 12 13 -0.15 64 0 0 8 36 36 18 39 46.1 7 241 -74 8 31 20 8 41 52 8 29 52 8 43 19 -0.14 65 0 0 9 7 41 18 39 47.0 6 242 -74 9 2 25 9 12 57 9 0 58 9 14 25 -0.14 66 0 0 9 38 45 18 39 47.8 5 242 -75 9 33 29 9 44 2 9 32 2 9 45 29 -0.14 67 0 0 10 9 47 18 39 48.4 4 242 -75 10 4 31 10 15 3 10 3 3 10 16 31 -0.14 68 0 0 10 40 45 18 39 48.8 3 242 -75 10 35 29 10 46 1 10 34 2 10 47 29 -0.13 69 0 0 11 11 39 18 39 49.2 2 242 -76 11 6 23 11 16 55 11 4 56 11 18 23 -0.11 70 0 0 11 42 28 18 39 49.3 1 242 -76 11 37 13 11 47 44 11 35 45 11 49 12 -0.05 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 316-122357 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 53 56.6545 DE: -26 48 43.237 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 53 56.6544 DE: -26 48 43.237 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.7 * B mag [mag]: 11.4 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1190) Pelagia asteroid class: approx. diameter [km]: 17 approx. diameter ["]: 0.009 distance from Earth [AU]: 2.46690 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#51 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): 0.010", 0.001", 92.298° remarks: * orbital elements for (1190)Pelagia : Mean anomaly = 233.9493137954 deg Arg. of pericenter = 41.6676687393 deg Long. of node = 26.3522721357 deg Inclination = 3.1684375336 deg Eccentricity = 0.1305557397 Semimajor axis = 2.4319043005 AU Perihelion dist = 2.1144052358 AU Mag: H = 12.77, G = 0.15 Epoch of elements : MJD 60575.77327825 TDT (2024 Sep 22.7733) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#512023Apr24,1.02,2024,9,22,18.558685,-0.011197,0.164613,9.365947,0.643860,0.005639,-0.000053,0.000000,0.000000 -11.6196,-26.8182,-100.27,-0.10,False UCAC4 316-122357,17.89907072,-26.8120103,11.38,10.74,10.39,0.1,0,,17.92476276,-26.8181580,7.17,7.07,0,0,0 1190,Pelagia,17.91,17.015,2.4669,0,0,2.495,2.30,,0.8,0 0,233.7483,2024,9,22,41.6677,26.3523,3.1684,0.13056,2.43190,2.11441,12.77,5.0,0.15 1.139,0.0097,0.0008,92,0.0013,Known errors,0.84,0,-1,-1 20240922_122357,60140.58 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 13:54 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org