IOTA/IOTA-ES occultation update for (329) Svea / UCAC4 436-047508 event on 2024 Jan 11, 02:09 UT Visible from Summary ------- On 2024 Jan 11 UT, the 76.148 km diameter asteroid (329) Svea will occult a 11.3 mag star in the constellation Hydra for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 2.24 mag to 13.36 mag (the magnitude of the asteroid) for at most 7.670 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: 100 * date and approx. time of event: 2024 Jan 11, 01:59 - 2024 Jan 11, 02:20 * geocentric midpoint of event [JD]: 2460320.59003859 * magnitude of target star: 11.27 * magnitude drop [mag]: 2.24 * estimated maximum duration [s]: 7.670 * Moon: 0 % sunlit, 144° distance * Sun: 150° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 79 * 1 sigma uncertainty interval [path widths]: +/- 0.08 * 1 sigma uncertainty interval [seconds]: +/- 1.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.014, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.014", 0.005", 94°) * approx speed of asteroid's shadow [km/s]: 9.9264 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 436-047508 by 329 Svea on 2024 Jan 11 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 -106 0 0 - 0 1 54 2 20 1.8 1 93 -16 0 19 26 - 0 23 15 0 23 1 - 0 26 52 .... -105 0 0 - 0 5 16 2 20 1.6 2 93 -17 0 16 4 - 0 26 37 0 19 40 - 0 30 14 0.19 -104 0 0 - 0 8 53 2 20 1.1 3 93 -18 0 12 27 - 0 30 15 0 16 3 - 0 33 52 0.21 -103 0 0 - 0 12 47 2 20 0.5 4 93 -19 0 8 34 - 0 34 9 0 12 10 - 0 37 45 0.22 -102 0 0 - 0 16 56 2 19 59.7 5 93 -19 0 4 25 - 0 38 18 0 8 1 - 0 41 55 0.23 -101 0 0 - 0 21 21 2 19 58.6 6 93 -20 0 0 0 - 0 42 43 0 3 36 - 0 46 20 0.23 -100 0 0 - 0 26 1 2 19 57.4 7 93 -21 - 0 4 40 - 0 47 24 - 0 1 3 - 0 51 1 0.24 - 99 0 0 - 0 30 57 2 19 56.0 8 93 -22 - 0 9 35 - 0 52 20 - 0 5 59 - 0 55 57 0.24 - 98 0 0 - 0 36 8 2 19 54.3 9 93 -23 - 0 14 46 - 0 57 32 - 0 11 9 - 1 1 9 0.24 - 97 0 0 - 0 41 34 2 19 52.5 10 93 -24 - 0 20 11 - 1 2 58 - 0 16 35 - 1 6 35 0.24 - 96 0 0 - 0 47 15 2 19 50.5 11 93 -25 - 0 25 52 - 1 8 40 - 0 22 16 - 1 12 17 0.24 - 95 0 0 - 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34.7 13 274 13 -28 44 42 -29 27 17 -28 41 7 -29 30 53 0.26 66 0 0 -29 6 24 1 59 32.5 12 274 14 -28 45 8 -29 27 43 -28 41 33 -29 31 19 0.26 67 0 0 -29 6 36 1 59 30.4 11 273 15 -28 45 19 -29 27 54 -28 41 44 -29 31 30 0.27 68 0 0 -29 6 33 1 59 28.5 11 273 15 -28 45 17 -29 27 51 -28 41 41 -29 31 27 0.27 69 0 0 -29 6 16 1 59 26.7 10 272 16 -28 45 0 -29 27 34 -28 41 25 -29 31 10 0.27 70 0 0 -29 5 45 1 59 25.1 9 272 17 -28 44 29 -29 27 3 -28 40 53 -29 30 39 0.27 71 0 0 -29 5 0 1 59 23.7 8 271 18 -28 43 43 -29 26 18 -28 40 8 -29 29 54 0.27 72 0 0 -29 4 0 1 59 22.3 7 271 19 -28 42 44 -29 25 19 -28 39 9 -29 28 55 0.27 73 0 0 -29 2 47 1 59 21.2 6 270 20 -28 41 30 -29 24 5 -28 37 55 -29 27 41 0.27 74 0 0 -29 1 19 1 59 20.1 5 270 20 -28 40 2 -29 22 37 -28 36 27 -29 26 13 0.28 75 0 0 -28 59 36 1 59 19.3 4 269 21 -28 38 20 -29 20 55 -28 34 44 -29 24 31 0.28 76 0 0 -28 57 40 1 59 18.6 4 269 22 -28 36 23 -29 18 59 -28 32 47 -29 22 35 0.29 77 0 0 -28 55 29 1 59 18.0 3 268 23 -28 34 12 -29 16 48 -28 30 36 -29 20 24 0.30 78 0 0 -28 53 4 1 59 17.6 2 268 24 -28 31 46 -29 14 23 -28 28 11 -29 17 59 0.32 79 0 0 -28 50 24 1 59 17.3 1 267 25 -28 29 7 -29 11 44 -28 25 31 -29 15 20 0.39 80 0 0 -28 47 30 1 59 17.2 0 267 25 -28 26 13 -29 8 50 -28 22 37 -29 12 26 1.55 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 12.0 Data for the target star ------------------------ * name: UCAC4 436-047508 * constellation : Hydra * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 08 32 34.1051 DE: -02 48 36.915 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 08 32 34.1051 DE: -02 48 36.916 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.3 * B mag [mag]: 11.8 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (329) Svea asteroid class: approx. diameter [km]: 76 approx. diameter ["]: 0.066 distance from Earth [AU]: 1.59840 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#81 date of fit: 2023 Apr 27 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): 0.014", 0.005", 93.76° remarks: * orbital elements for (329)Svea : Mean anomaly = 248.0967030323 deg Arg. of pericenter = 58.0392106654 deg Long. of node = 178.4423954511 deg Inclination = 15.8823301122 deg Eccentricity = 0.0259219811 Semimajor axis = 2.4760444410 AU Perihelion dist = 2.4118604638 AU Mag: H = 9.66, G = 0.15 Epoch of elements : MJD 60320.09003854 TDT (2024 Jan 11.0900) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#812023Apr27,7.67,2024,1,11,2.160926,-0.061235,-0.239779,-5.428452,1.386480,-0.001550,0.002461,0.000002,0.000000 -14.0617,-2.8918,149.48,-21.90,False UCAC4 436-047508,8.54280697,-2.8102542,11.80,11.27,10.98,0.0,0,,8.56325481,-2.8917592,2.24,2.10,0,0,0 329,Svea,13.36,76.148,1.5984,0,0,-1.993,7.63,,3.6,0 0,248.0739,2024,1,11,58.0392,178.4424,15.8823,0.02592,2.47604,2.41186,9.66,5.0,0.15 1.084,0.0140,0.0050,94,0.0055,Known errors,1.01,0,-1,-1 20240111_047508,60137.01 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 12, 00:14 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org