IOTA/IOTA-ES occultation update for (329) Svea / TYC 4671-00784-1 event on 2022 Dec 18, 01:09 UT Visible from South America Summary ------- On 2022 Dec 18 UT, the 76.1 km diameter asteroid (329) Svea will occult a 11.3 mag star in the constellation Cetus for observers along a path across South America. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.30 mag to 14.51 mag (the magnitude of the asteroid) for at most 6.170 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: 2022 Dec 18, 01:01 - 2022 Dec 18, 01:18 * geocentric midpoint of event [JD]: 2459931.54836734 * magnitude of target star: 11.26 * magnitude drop [mag]: 3.30 * estimated maximum duration [s]: 6.170 * Moon: 33 % sunlit, 166° distance * Sun: 98° distance * rough path description: South America Additional comments ------------------- RUWE high The occultation path -------------------- * approximate projected width [km]: 80 * 1 sigma uncertainty interval [path widths]: +/- 0.07 * 1 sigma uncertainty interval [seconds]: +/- 1.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.010, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.010", 0.003", 70°) * approx speed of asteroid's shadow [km/s]: 12.3391 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 4671-00784-1 by 329 Svea on 2022 Dec 18 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 171 0 0 -36 15 44 1 1 25.1 0 98 76 -36 37 32 -35 53 59 -36 40 33 -35 50 58 .... 172 0 0 -36 22 18 1 1 25.2 1 97 75 -36 44 4 -36 0 33 -36 47 5 -35 57 33 0.24 173 0 0 -36 28 33 1 1 25.4 2 97 75 -36 50 19 -36 6 50 -36 53 20 -36 3 50 0.27 174 0 0 -36 34 31 1 1 25.7 3 96 74 -36 56 15 -36 12 49 -36 59 16 -36 9 49 0.28 175 0 0 -36 40 10 1 1 26.1 4 95 73 -37 1 54 -36 18 29 -37 4 55 -36 15 29 0.29 176 0 0 -36 45 32 1 1 26.7 4 95 73 -37 7 14 -36 23 52 -37 10 15 -36 20 52 0.29 177 0 0 -36 50 35 1 1 27.3 5 94 72 -37 12 17 -36 28 56 -37 15 17 -36 25 56 0.29 178 0 0 -36 55 20 1 1 28.0 6 94 72 -37 17 1 -36 33 42 -37 20 2 -36 30 43 0.30 179 0 0 -36 59 48 1 1 28.9 7 93 71 -37 21 27 -36 38 10 -37 24 28 -36 35 11 0.30 -180 0 0 -37 3 56 1 1 29.9 8 92 70 -37 25 36 -36 42 20 -37 28 36 -36 39 20 0.30 -179 0 0 -37 7 47 1 1 30.9 8 92 70 -37 29 25 -36 46 11 -37 32 25 -36 43 12 0.30 -178 0 0 -37 11 19 1 1 32.1 9 91 69 -37 32 57 -36 49 44 -37 35 57 -36 46 45 0.30 -177 0 0 -37 14 34 1 1 33.4 10 91 68 -37 36 11 -36 52 59 -37 39 11 -36 50 0 0.30 -176 0 0 -37 17 30 1 1 34.7 11 90 68 -37 39 6 -36 55 56 -37 42 6 -36 52 56 0.30 -175 0 0 -37 20 7 1 1 36.2 12 89 67 -37 41 43 -36 58 34 -37 44 43 -36 55 35 0.30 -174 0 0 -37 22 26 1 1 37.8 12 89 66 -37 44 2 -37 0 53 -37 47 2 -36 57 55 0.30 -173 0 0 -37 24 27 1 1 39.5 13 88 66 -37 46 3 -37 2 55 -37 49 2 -36 59 56 0.30 -172 0 0 -37 26 10 1 1 41.2 14 87 65 -37 47 45 -37 4 38 -37 50 44 -37 1 39 0.30 -171 0 0 -37 27 34 1 1 43.1 15 87 64 -37 49 9 -37 6 2 -37 52 8 -37 3 4 0.30 -170 0 0 -37 28 40 1 1 45.1 16 86 63 -37 50 14 -37 7 8 -37 53 14 -37 4 10 0.30 -169 0 0 -37 29 27 1 1 47.2 16 86 63 -37 51 1 -37 7 56 -37 54 1 -37 4 57 0.30 -168 0 0 -37 29 56 1 1 49.4 17 85 62 -37 51 30 -37 8 25 -37 54 30 -37 5 26 0.30 -167 0 0 -37 30 7 1 1 51.7 18 84 61 -37 51 41 -37 8 36 -37 54 40 -37 5 37 0.30 -166 0 0 -37 29 59 1 1 54.1 19 84 60 -37 51 32 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28 0.32 - 42 0 0 - 4 48 54 1 16 20.3 34 265 -55 - 5 11 33 - 4 26 19 - 5 14 42 - 4 23 11 0.32 - 41 0 0 - 4 30 52 1 16 25.8 33 265 -55 - 4 53 29 - 4 8 18 - 4 56 37 - 4 5 11 0.32 - 40 0 0 - 4 13 7 1 16 31.1 32 265 -56 - 4 35 42 - 3 50 35 - 4 38 50 - 3 47 28 0.32 - 39 0 0 - 3 55 40 1 16 36.3 31 265 -57 - 4 18 14 - 3 33 10 - 4 21 21 - 3 30 3 0.32 - 38 0 0 - 3 38 32 1 16 41.3 30 265 -58 - 4 1 3 - 3 16 3 - 4 4 10 - 3 12 57 0.32 - 37 0 0 - 3 21 41 1 16 46.2 29 264 -59 - 3 44 11 - 2 59 15 - 3 47 18 - 2 56 8 0.32 - 36 0 0 - 3 5 9 1 16 50.9 28 264 -59 - 3 27 37 - 2 42 45 - 3 30 44 - 2 39 39 0.32 - 35 0 0 - 2 48 57 1 16 55.4 27 264 -60 - 3 11 22 - 2 26 34 - 3 14 29 - 2 23 28 0.32 - 34 0 0 - 2 33 3 1 16 59.7 26 264 -61 - 2 55 27 - 2 10 42 - 2 58 33 - 2 7 36 0.33 - 33 0 0 - 2 17 29 1 17 3.9 24 264 -61 - 2 39 51 - 1 55 9 - 2 42 57 - 1 52 4 0.33 - 32 0 0 - 2 2 14 1 17 7.9 23 264 -62 - 2 24 35 - 1 39 57 - 2 27 41 - 1 36 52 0.33 - 31 0 0 - 1 47 20 1 17 11.8 22 264 -63 - 2 9 38 - 1 25 4 - 2 12 44 - 1 21 59 0.33 - 30 0 0 - 1 32 45 1 17 15.5 21 264 -63 - 1 55 2 - 1 10 31 - 1 58 7 - 1 7 27 0.33 - 29 0 0 - 1 18 31 1 17 19.0 20 264 -64 - 1 40 46 - 0 56 19 - 1 43 51 - 0 53 14 0.33 - 28 0 0 - 1 4 37 1 17 22.3 19 264 -64 - 1 26 51 - 0 42 27 - 1 29 56 - 0 39 23 0.33 - 27 0 0 - 0 51 5 1 17 25.4 18 263 -65 - 1 13 16 - 0 28 56 - 1 16 21 - 0 25 52 0.33 - 26 0 0 - 0 37 52 1 17 28.4 17 263 -65 - 1 0 2 - 0 15 45 - 1 3 7 - 0 12 42 0.33 - 25 0 0 - 0 25 1 1 17 31.2 16 263 -66 - 0 47 10 - 0 2 56 - 0 50 14 0 0 8 0.33 - 24 0 0 - 0 12 32 1 17 33.9 15 263 -66 - 0 34 38 0 9 32 - 0 37 42 0 12 36 0.33 - 23 0 0 - 0 0 23 1 17 36.3 14 263 -66 - 0 22 28 0 21 39 - 0 25 32 0 24 42 0.33 - 22 0 0 0 11 24 1 17 38.6 13 263 -67 - 0 10 40 0 33 25 - 0 13 43 0 36 28 0.33 - 21 0 0 0 22 50 1 17 40.7 12 263 -67 0 0 48 0 44 49 - 0 2 16 0 47 51 0.33 - 20 0 0 0 33 53 1 17 42.7 11 263 -67 0 11 53 0 55 51 0 8 50 0 58 53 0.33 - 19 0 0 0 44 35 1 17 44.5 10 263 -67 0 22 36 1 6 32 0 19 33 1 9 34 0.34 - 18 0 0 0 54 55 1 17 46.1 9 263 -67 0 32 58 1 16 50 0 29 55 1 19 52 0.34 - 17 0 0 1 4 54 1 17 47.5 8 263 -67 0 42 57 1 26 47 0 39 55 1 29 49 0.34 - 16 0 0 1 14 30 1 17 48.7 7 263 -67 0 52 35 1 36 22 0 49 32 1 39 24 0.34 - 15 0 0 1 23 44 1 17 49.8 6 263 -67 1 1 50 1 45 35 0 58 48 1 48 36 0.35 - 14 0 0 1 32 35 1 17 50.8 5 263 -67 1 10 43 1 54 25 1 7 41 1 57 26 0.35 - 13 0 0 1 41 5 1 17 51.5 4 263 -67 1 19 14 2 2 54 1 16 12 2 5 55 0.37 - 12 0 0 1 49 12 1 17 52.1 3 263 -67 1 27 22 2 11 0 1 24 20 2 14 0 0.38 - 11 0 0 1 56 57 1 17 52.5 2 263 -67 1 35 8 2 18 43 1 32 7 2 21 44 0.42 - 10 0 0 2 4 19 1 17 52.7 1 264 -66 1 42 31 2 26 5 1 39 30 2 29 5 0.52 Uncertainty in time = +/- 1 secs Prediction of 2022 Dec 1.1 Data for the target star ------------------------ * name: TYC 4671-00784-1 * constellation : Cetus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 00 28 03.9442 DE: -06 34 38.594 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 00 28 03.9440 DE: -06 34 38.595 * position source: Gaia EDR3 * standard error: RA,DE [mas]: (1.100,0.800) * V mag [mag]: 11.3 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (329) Svea asteroid class: approx. diameter [km]: 76 approx. diameter ["]: 0.048 distance from Earth [AU]: 2.20060 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#79 date of fit: 2022 Nov 22 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", 0.003", 69.775° remarks: * orbital elements for (329)Svea : Mean anomaly = 149.7948720250 deg Arg. of pericenter = 57.9514210360 deg Long. of node = 178.4528934861 deg Inclination = 15.8839631171 deg Eccentricity = 0.0250689551 Semimajor axis = 2.4779248533 AU Perihelion dist = 2.4158058663 AU Mag: H = 9.67, G = 0.15 Epoch of elements : MJD 59931.04847222 TDT (2022 Dec 18.0485) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#792022Nov22,6.17,2022,12,18,1.160816,0.097049,-0.276670,6.575918,2.293966,0.005271,0.002436,0.000000,0.000000 -96.7421,-6.4521,161.67,-23.38,False TYC 4671-00784-1,0.46776230,-6.5773871,0.00,11.26,0.00,0.0,0,,0.48714423,-6.4520885,3.31,0.00,0,0,0 329,Svea,14.51,76.1,2.2006,0,0,1.764,9.17,,3.6,0 0,149.5299,2022,12,17,57.9514,178.4529,15.8840,0.02507,2.47792,2.41581,9.70,5.0,0.15 1.069,0.0104,0.0033,70,0.0033,Known errors,-1.00,-1,-1,-1 20221218_0784-1,59914.08 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Dec 01, 02:02 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org