IOTA/IOTA-ES occultation update for (569) Misa / TYC 5241-01246-1 event on 2022 Dec 12, 23:55 UT Visible from South America Summary ------- On 2022 Dec 12 UT, the 66.6 km diameter asteroid (569) Misa will occult a 9.8 mag star in the constellation Aquarius 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 5.37 mag to 15.14 mag (the magnitude of the asteroid) for at most 3.230 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 Dec 12, 23:50 - 2022 Dec 13, 00:00 * geocentric midpoint of event [JD]: 2459926.49692346 * magnitude of target star: 9.78 * magnitude drop [mag]: 5.37 * estimated maximum duration [s]: 3.230 * Moon: 80 % sunlit, 150° distance * Sun: 82° distance * rough path description: South America The occultation path -------------------- * approximate projected width [km]: 67 * 1 sigma uncertainty interval [path widths]: +/- 0.29 * 1 sigma uncertainty interval [seconds]: +/- 1.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.016, +/- 0.012) * 1 sigma uncertainty ellipse (major, minor, PA): (0.016", 0.011", 66°) * approx speed of asteroid's shadow [km/s]: 20.6484 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5241-01246-1 by 569 Misa on 2022 Dec 12 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 174 0 0 -17 52 17 23 50 26.2 1 95 82 -18 10 27 -17 34 7 -18 20 57 -17 23 36 .... 175 0 0 -17 57 33 23 50 26.4 2 95 82 -18 15 42 -17 39 23 -18 26 12 -17 28 53 -0.03 176 0 0 -18 2 25 23 50 26.6 3 95 83 -18 20 34 -17 44 16 -18 31 3 -17 33 46 -0.05 177 0 0 -18 6 55 23 50 26.9 4 95 84 -18 25 3 -17 48 47 -18 35 32 -17 38 17 -0.05 178 0 0 -18 11 2 23 50 27.2 5 94 84 -18 29 10 -17 52 54 -18 39 39 -17 42 25 -0.06 179 0 0 -18 14 47 23 50 27.7 6 94 85 -18 32 54 -17 56 39 -18 43 23 -17 46 10 -0.06 -180 0 0 -18 18 9 23 50 28.3 7 94 85 -18 36 15 -18 0 1 -18 46 44 -17 49 33 -0.06 -179 0 0 -18 21 7 23 50 28.9 8 93 85 -18 39 14 -18 3 0 -18 49 42 -17 52 32 -0.06 -178 0 0 -18 23 43 23 50 29.6 8 93 85 -18 41 50 -18 5 37 -18 52 17 -17 55 8 -0.06 -177 0 0 -18 25 56 23 50 30.4 9 93 85 -18 44 2 -18 7 50 -18 54 30 -17 57 22 -0.06 -176 0 0 -18 27 46 23 50 31.3 10 92 84 -18 45 52 -18 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22 44 46 23 21 48 22 34 5 23 32 30 -0.06 - 27 0 0 23 15 14 0 0 31.2 + 15 257 -67 22 56 45 23 33 43 22 46 4 23 44 24 -0.06 - 26 0 0 23 26 49 0 0 32.5 + 14 257 -68 23 8 22 23 45 17 22 57 42 23 55 58 -0.06 - 25 0 0 23 38 3 0 0 33.7 + 14 258 -69 23 19 37 23 56 30 23 8 58 24 7 9 -0.06 - 24 0 0 23 48 56 0 0 34.8 + 13 258 -69 23 30 31 24 7 21 23 19 52 24 18 0 -0.06 - 23 0 0 23 59 27 0 0 35.9 + 12 259 -70 23 41 3 24 17 51 23 30 25 24 28 29 -0.06 - 22 0 0 24 9 36 0 0 36.9 + 11 259 -71 23 51 14 24 27 59 23 40 37 24 38 36 -0.06 - 21 0 0 24 19 24 0 0 37.8 + 10 259 -72 24 1 3 24 37 46 23 50 27 24 48 22 -0.06 - 20 0 0 24 28 50 0 0 38.6 + 9 260 -73 24 10 30 24 47 11 23 59 55 24 57 47 -0.06 - 19 0 0 24 37 55 0 0 39.3 + 8 260 -74 24 19 36 24 56 14 24 9 1 25 6 50 -0.06 - 18 0 0 24 46 38 0 0 39.9 + 7 261 -75 24 28 21 25 4 56 24 17 46 25 15 31 -0.06 - 17 0 0 24 55 0 0 0 40.5 + 6 261 -76 24 36 43 25 13 17 24 26 9 25 23 51 -0.06 - 16 0 0 25 3 0 0 0 41.0 + 5 262 -77 24 44 44 25 21 16 24 34 11 25 31 49 -0.06 - 15 0 0 25 10 38 0 0 41.4 + 4 262 -78 24 52 23 25 28 53 24 41 51 25 39 26 -0.06 - 14 0 0 25 17 54 0 0 41.7 + 3 262 -78 24 59 41 25 36 8 24 49 9 25 46 41 -0.06 - 13 0 0 25 24 49 0 0 42.0 + 2 263 -79 25 6 36 25 43 2 24 56 5 25 53 34 -0.06 - 12 0 0 25 31 23 0 0 42.1 + 2 263 -80 25 13 11 25 49 35 25 2 40 26 0 6 -0.06 - 11 0 0 25 37 34 0 0 42.2 + 1 264 -81 25 19 23 25 55 46 25 8 53 26 6 17 -0.05 Uncertainty in time = +/- 1 secs Prediction of 2022 Dec 1.1 Data for the target star ------------------------ * name: TYC 5241-01246-1 * constellation : Aquarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 22 55 17.4156 DE: -05 35 32.610 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 22 55 17.4156 DE: -05 35 32.611 * position source: Gaia EDR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 9.8 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (569) Misa asteroid class: approx. diameter [km]: 67 approx. diameter ["]: 0.038 distance from Earth [AU]: 2.41100 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#54 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): 0.016", 0.011", 66.394° remarks: * orbital elements for (569)Misa : Mean anomaly = 301.7217177350 deg Arg. of pericenter = 142.2862159758 deg Long. of node = 301.5970076968 deg Inclination = 1.2877558618 deg Eccentricity = 0.1797807392 Semimajor axis = 2.6602083438 AU Perihelion dist = 2.1819541213 AU Mag: H = 10.10, G = 0.15 Epoch of elements : MJD 59925.99701389 TDT (2022 Dec 12.9970) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#542022Nov22,3.23,2022,12,12,23.926163,-0.025770,0.063910,10.827696,4.311517,0.005316,0.002216,0.000000,0.000000 -96.4341,-5.4715,179.59,-23.13,False TYC 5241-01246-1,22.92150436,-5.5923916,0.00,9.78,0.00,0.0,0,,22.94109468,-5.4715043,5.37,0.00,0,0,0 569,Misa,15.14,66.6,2.4110,0,0,2.646,15.73,,4.2,0 0,301.4952,2022,12,12,142.2862,301.5970,1.2878,0.17978,2.66021,2.18195,10.16,5.0,0.15 1.289,0.0163,0.0110,66,0.0110,Known errors,-1.00,-1,-1,-1 20221212_1246-1,59914.08 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Dec 01, 01:59 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org