IOTA/IOTA-ES occultation update for (506) Marion / TYC 5765-00475-1 event on 2022 Nov 17, 00:14 UT Visible from South America Summary ------- On 2022 Nov 17 UT, the 103.3 km diameter asteroid (506) Marion will occult a 10.9 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 4.21 mag to 15.05 mag (the magnitude of the asteroid) for at most 5.120 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 Nov 17, 00:08 - 2022 Nov 17, 00:19 * geocentric midpoint of event [JD]: 2459900.50979692 * magnitude of target star: 10.86 * magnitude drop [mag]: 4.21 * estimated maximum duration [s]: 5.120 * Moon: 45 % sunlit, 160° distance * Sun: 79° distance * rough path description: South America The occultation path -------------------- * approximate projected width [km]: 103 * 1 sigma uncertainty interval [path widths]: +/- 0.12 * 1 sigma uncertainty interval [seconds]: +/- 1.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.010, +/- 0.008) * 1 sigma uncertainty ellipse (major, minor, PA): (0.012", 0.005", 56°) * approx speed of asteroid's shadow [km/s]: 20.1951 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5765-00475-1 by 506 Marion on 2022 Nov 17 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 162 0 0 -19 10 6 0 8 51.2 0 103 79 -19 38 48 -18 41 22 -19 45 41 -18 34 29 .... 163 0 0 -19 22 37 0 8 51.3 1 102 79 -19 51 17 -18 53 56 -19 58 10 -18 47 3 0.03 164 0 0 -19 34 44 0 8 51.4 2 102 80 -20 3 22 -19 6 6 -20 10 14 -18 59 13 0.00 165 0 0 -19 46 27 0 8 51.7 3 102 81 -20 15 2 -19 17 51 -20 21 53 -19 10 59 -0.02 166 0 0 -19 57 45 0 8 52.0 4 101 82 -20 26 18 -19 29 11 -20 33 9 -19 22 20 -0.02 167 0 0 -20 8 38 0 8 52.5 5 101 83 -20 37 9 -19 40 7 -20 43 59 -19 33 16 -0.03 168 0 0 -20 19 8 0 8 53.0 6 101 84 -20 47 36 -19 50 38 -20 54 26 -19 43 48 -0.03 169 0 0 -20 29 12 0 8 53.6 7 100 85 -20 57 38 -20 0 45 -21 4 27 -19 53 55 -0.04 170 0 0 -20 38 51 0 8 54.3 8 100 86 -21 7 16 -20 10 27 -21 14 5 -20 3 37 -0.04 171 0 0 -20 48 6 0 8 55.1 9 100 86 -21 16 29 -20 19 43 -21 23 17 -20 12 55 -0.04 172 0 0 -20 56 56 0 8 55.9 10 99 87 -21 25 17 -20 28 35 -21 32 5 -20 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19 0 18 44.1 28 246 -49 15 28 3 16 28 36 15 20 47 16 35 52 -0.04 - 50 0 0 16 21 49 0 18 46.8 27 247 -50 15 51 36 16 52 2 15 44 21 16 59 18 -0.04 - 49 0 0 16 44 59 0 18 49.3 26 247 -51 16 14 49 17 15 9 16 7 35 17 22 24 -0.04 - 48 0 0 17 7 48 0 18 51.8 25 247 -52 16 37 42 17 37 55 16 30 28 17 45 9 -0.04 - 47 0 0 17 30 17 0 18 54.2 24 248 -53 17 0 14 18 0 21 16 53 1 18 7 34 -0.04 - 46 0 0 17 52 26 0 18 56.5 23 248 -54 17 22 26 18 22 27 17 15 14 18 29 39 -0.04 - 45 0 0 18 14 13 0 18 58.6 22 248 -55 17 44 16 18 44 11 17 37 5 18 51 22 -0.04 - 44 0 0 18 35 39 0 19 0.7 21 249 -56 18 5 46 19 5 33 17 58 35 19 12 44 -0.04 - 43 0 0 18 56 44 0 19 2.7 20 249 -57 18 26 53 19 26 35 18 19 44 19 33 44 -0.04 - 42 0 0 19 17 26 0 19 4.5 19 249 -58 18 47 39 19 47 14 18 40 30 19 54 23 -0.04 - 41 0 0 19 37 47 0 19 6.3 18 250 -59 19 8 3 20 7 31 19 0 55 20 14 39 -0.04 - 40 0 0 19 57 45 0 19 8.0 17 250 -60 19 28 4 20 27 26 19 20 57 20 34 33 -0.04 - 39 0 0 20 17 20 0 19 9.5 16 250 -61 19 47 43 20 46 58 19 40 37 20 54 5 -0.04 - 38 0 0 20 36 33 0 19 11.0 15 251 -62 20 7 0 21 6 8 19 59 54 21 13 14 -0.04 - 37 0 0 20 55 24 0 19 12.4 14 251 -63 20 25 53 21 24 55 20 18 48 21 32 0 -0.04 - 36 0 0 21 13 51 0 19 13.6 13 251 -64 20 44 24 21 43 19 20 37 20 21 50 23 -0.04 - 35 0 0 21 31 55 0 19 14.8 12 252 -65 21 2 31 22 1 19 20 55 28 22 8 23 -0.04 - 34 0 0 21 49 36 0 19 15.9 11 252 -66 21 20 15 22 18 57 21 13 12 22 26 0 -0.04 - 33 0 0 22 6 53 0 19 16.9 10 253 -67 21 37 36 22 36 11 21 30 34 22 43 13 -0.04 - 32 0 0 22 23 47 0 19 17.7 9 253 -68 21 54 33 22 53 2 21 47 32 23 0 3 -0.04 - 31 0 0 22 40 17 0 19 18.5 8 253 -69 22 11 6 23 9 29 22 4 6 23 16 30 -0.04 - 30 0 0 22 56 24 0 19 19.3 7 254 -70 22 27 16 23 25 33 22 20 17 23 32 33 -0.03 - 29 0 0 23 12 7 0 19 19.9 6 254 -70 22 43 2 23 41 13 22 36 4 23 48 12 -0.03 - 28 0 0 23 27 27 0 19 20.4 5 254 -71 22 58 25 23 56 29 22 51 27 24 3 28 -0.03 - 27 0 0 23 42 22 0 19 20.8 4 255 -72 23 13 23 24 11 22 23 6 26 24 18 19 -0.03 - 26 0 0 23 56 54 0 19 21.2 3 255 -73 23 27 57 24 25 51 23 21 1 24 32 47 -0.03 - 25 0 0 24 11 1 0 19 21.4 2 256 -74 23 42 8 24 39 55 23 35 12 24 46 52 -0.02 - 24 0 0 24 24 45 0 19 21.6 1 256 -75 23 55 55 24 53 36 23 48 59 25 0 32 0.00 - 23 0 0 24 38 5 0 19 21.7 1 257 -75 24 9 17 25 6 53 24 2 23 25 13 48 0.06 Uncertainty in time = +/- 1 secs Prediction of 2022 Oct 2.0 Data for the target star ------------------------ * name: TYC 5765-00475-1 * constellation : Aquarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 20 55 05.3591 DE: -12 06 16.138 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 20 55 05.3588 DE: -12 06 16.139 * position source: Gaia EDR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 10.9 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (506) Marion asteroid class: approx. diameter [km]: 103 approx. diameter ["]: 0.043 distance from Earth [AU]: 3.31740 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#103 date of fit: 2022 Sep 21 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): 0.012", 0.005", 56.314° remarks: * orbital elements for (506)Marion : Mean anomaly = 246.6687954145 deg Arg. of pericenter = 145.4357859889 deg Long. of node = 312.9365441058 deg Inclination = 16.9966777955 deg Eccentricity = 0.1463692394 Semimajor axis = 3.0414940820 AU Perihelion dist = 2.5963129067 AU Mag: H = 8.96, G = 0.15 Epoch of elements : MJD 59900.00986111 TDT (2022 Nov 17.0099) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1032022Sep21,5.12,2022,11,17,0.235126,-0.019293,0.046698,10.545417,4.327082,0.005619,0.001730,0.000000,0.000000 -105.4900,-12.0183,172.69,-18.92,False TYC 5765-00475-1,20.91815526,-12.1044831,0.00,10.86,0.00,0.0,0,,20.93870148,-12.0182839,4.21,0.00,0,0,0 506,Marion,15.05,103.3,3.3174,0,0,1.905,11.47,,5.0,0 0,246.4812,2022,11,16,145.4358,312.9365,16.9967,0.14637,3.04149,2.59631,8.96,5.0,0.15 1.120,0.0120,0.0047,56,0.0052,Known errors,-1.00,-1,-1,-1 20221117_0475-1,59854.00 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Oct 02, 00:06 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org