IOTA/IOTA-ES occultation update for (308) Polyxo / TYC 6289-01799-1 event on 2024 Nov 04, 22:06 UT Visible from Summary ------- On 2024 Nov 04 UT, the 136.600677000209 km diameter asteroid (308) Polyxo will occult a 9.1 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 4.58 mag to 13.62 mag (the magnitude of the asteroid) for at most 4.100 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 Nov 04, 22:03 - 2024 Nov 04, 22:10 * geocentric midpoint of event [JD]: 2460619.42148630 * magnitude of target star: 9.06 * magnitude drop [mag]: 4.58 * estimated maximum duration [s]: 4.100 * Moon: 10 % sunlit, 24° distance * Sun: 59° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 139 * 1 sigma uncertainty interval [path widths]: +/- 0.03 * 1 sigma uncertainty interval [seconds]: +/- 0.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.007, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.007", 0.002", 88°) * approx speed of asteroid's shadow [km/s]: 33.4582 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6289-01799-1 by 308 Polyxo on 2024 Nov 4 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 -11 58 4 22 3 49.0 1 110 60 -12 38 21 -11 17 53 -12 40 24 -11 15 50 .... 175 0 0 -12 19 30 22 3 49.1 2 110 61 -12 59 47 -11 39 19 -13 1 50 -11 37 16 0.20 176 0 0 -12 40 53 22 3 49.2 3 109 62 -13 21 10 -12 0 43 -13 23 13 -11 58 40 0.20 177 0 0 -13 2 13 22 3 49.4 4 109 63 -13 42 29 -12 22 3 -13 44 32 -12 20 0 0.19 178 0 0 -13 23 29 22 3 49.7 5 109 64 -14 3 44 -12 43 19 -14 5 47 -12 41 16 0.19 179 0 0 -13 44 40 22 3 50.0 6 109 65 -14 24 55 -13 4 31 -14 26 58 -13 2 28 0.19 -180 0 0 -14 5 46 22 3 50.4 7 108 66 -14 46 0 -13 25 38 -14 48 4 -13 23 36 0.19 -179 0 0 -14 26 47 22 3 50.9 8 108 67 -15 7 0 -13 46 40 -15 9 4 -13 44 37 0.19 -178 0 0 -14 47 43 22 3 51.4 9 108 68 -15 27 55 -14 7 36 -15 29 58 -14 5 33 0.19 -177 0 0 -15 8 31 22 3 52.0 10 108 69 -15 48 42 -14 28 26 -15 50 45 -14 26 23 0.19 -176 0 0 -15 29 13 22 3 52.6 11 107 70 -16 9 23 -14 49 9 -16 11 26 -14 47 7 0.19 -175 0 0 -15 49 48 22 3 53.3 12 107 71 -16 29 57 -15 9 45 -16 32 0 -15 7 43 0.19 -174 0 0 -16 10 15 22 3 54.1 13 107 72 -16 50 23 -15 30 14 -16 52 26 -15 28 11 0.19 -173 0 0 -16 30 35 22 3 54.9 14 107 73 -17 10 40 -15 50 34 -17 12 43 -15 48 32 0.19 -172 0 0 -16 50 45 22 3 55.8 15 106 74 -17 30 50 -16 10 46 -17 32 52 -16 8 44 0.19 -171 0 0 -17 10 47 22 3 56.7 16 106 75 -17 50 50 -16 30 50 -17 52 52 -16 28 47 0.19 -170 0 0 -17 30 39 22 3 57.7 17 106 76 -18 10 40 -16 50 44 -18 12 43 -16 48 42 0.19 -169 0 0 -17 50 22 22 3 58.8 18 105 76 -18 30 21 -17 10 28 -18 32 24 -17 8 26 0.19 -168 0 0 -18 9 55 22 3 59.9 19 105 77 -18 49 52 -17 30 2 -18 51 54 -17 28 1 0.19 -167 0 0 -18 29 17 22 4 1.0 20 105 78 -19 9 12 -17 49 26 -19 11 14 -17 47 25 0.19 -166 0 0 -18 48 28 22 4 2.2 21 104 79 -19 28 21 -18 8 39 -19 30 24 -18 6 38 0.19 -165 0 0 -19 7 28 22 4 3.5 22 104 80 -19 47 19 -18 27 41 -19 49 21 -18 25 40 0.19 -164 0 0 -19 26 16 22 4 4.8 23 104 81 -20 6 5 -18 46 32 -20 8 8 -18 44 30 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29 257 -29 -18 18 13 -16 58 17 -18 20 16 -16 56 15 0.19 - 28 0 0 -17 18 21 22 9 41.8 28 257 -29 -17 58 23 -16 38 24 -18 0 26 -16 36 21 0.19 - 27 0 0 -16 58 20 22 9 43.3 27 256 -30 -17 38 24 -16 18 21 -17 40 27 -16 16 18 0.19 - 26 0 0 -16 38 9 22 9 44.9 26 256 -31 -17 18 15 -15 58 9 -17 20 18 -15 56 6 0.19 - 25 0 0 -16 17 50 22 9 46.3 25 256 -32 -16 57 57 -15 37 48 -17 0 0 -15 35 46 0.19 - 24 0 0 -15 57 22 22 9 47.7 24 255 -33 -16 37 31 -15 17 19 -16 39 34 -15 15 17 0.20 - 23 0 0 -15 36 47 22 9 49.1 23 255 -34 -16 16 57 -14 56 43 -16 19 0 -14 54 40 0.20 - 22 0 0 -15 16 4 22 9 50.4 22 255 -36 -15 56 15 -14 35 59 -15 58 19 -14 33 56 0.20 - 21 0 0 -14 55 14 22 9 51.7 21 254 -37 -15 35 27 -14 15 8 -15 37 30 -14 13 5 0.20 - 20 0 0 -14 34 18 22 9 52.9 20 254 -38 -15 14 31 -13 54 10 -15 16 35 -13 52 8 0.20 - 19 0 0 -14 13 16 22 9 54.0 18 254 -39 -14 53 30 -13 33 7 -14 55 33 -13 31 4 0.20 - 18 0 0 -13 52 8 22 9 55.1 17 254 -40 -14 32 23 -13 11 58 -14 34 26 -13 9 55 0.20 - 17 0 0 -13 30 55 22 9 56.1 16 253 -41 -14 11 10 -12 50 44 -14 13 14 -12 48 42 0.20 - 16 0 0 -13 9 37 22 9 57.1 15 253 -42 -13 49 53 -12 29 26 -13 51 57 -12 27 23 0.20 - 15 0 0 -12 48 15 22 9 58.0 14 253 -43 -13 28 32 -12 8 3 -13 30 35 -12 6 1 0.20 - 14 0 0 -12 26 49 22 9 58.8 13 253 -44 -13 7 6 -11 46 37 -13 9 10 -11 44 35 0.20 - 13 0 0 -12 5 20 22 9 59.6 12 252 -45 -12 45 38 -11 25 8 -12 47 41 -11 23 5 0.20 - 12 0 0 -11 43 49 22 10 0.3 11 252 -46 -12 24 7 -11 3 37 -12 26 10 -11 1 34 0.21 - 11 0 0 -11 22 15 22 10 1.0 10 252 -47 -12 2 33 -10 42 3 -12 4 36 -10 40 0 0.21 - 10 0 0 -11 0 40 22 10 1.6 9 252 -48 -11 40 58 -10 20 27 -11 43 1 -10 18 24 0.21 - 9 0 0 -10 39 3 22 10 2.1 8 252 -49 -11 19 21 - 9 58 51 -11 21 24 - 9 56 48 0.21 - 8 0 0 -10 17 26 22 10 2.6 7 251 -50 -10 57 43 - 9 37 13 -10 59 47 - 9 35 11 0.22 - 7 0 0 - 9 55 48 22 10 3.0 6 251 -50 -10 36 5 - 9 15 36 -10 38 9 - 9 13 33 0.22 - 6 0 0 - 9 34 11 22 10 3.3 5 251 -51 -10 14 28 - 8 53 59 -10 16 31 - 8 51 57 0.23 - 5 0 0 - 9 12 34 22 10 3.6 4 251 -52 - 9 52 51 - 8 32 23 - 9 54 54 - 8 30 21 0.25 - 4 0 0 - 8 50 59 22 10 3.8 3 251 -53 - 9 31 15 - 8 10 49 - 9 33 19 - 8 8 46 0.27 - 3 0 0 - 8 29 26 22 10 3.9 2 251 -54 - 9 9 41 - 7 49 16 - 9 11 45 - 7 47 14 0.31 - 2 0 0 - 8 7 55 22 10 4.0 1 250 -55 - 8 48 10 - 7 27 46 - 8 50 13 - 7 25 43 0.50 Uncertainty in time = +/- 0 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 6289-01799-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 50 40.5307 DE: -19 34 00.120 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 50 40.5306 DE: -19 34 00.120 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 9.1 * B mag [mag]: 10.0 * Diameter [mas]: 0.20 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (308) Polyxo asteroid class: approx. diameter [km]: 137 approx. diameter ["]: 0.063 distance from Earth [AU]: 3.00800 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#111 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): 0.007", 0.002", 87.553° remarks: * orbital elements for (308)Polyxo : Mean anomaly = 6.3914975131 deg Arg. of pericenter = 112.2430882194 deg Long. of node = 181.5830187789 deg Inclination = 4.3625860939 deg Eccentricity = 0.0386403099 Semimajor axis = 2.7495976562 AU Perihelion dist = 2.6433523506 AU Mag: H = 8.16, G = 0.21 Epoch of elements : MJD 60618.92148617 TDT (2024 Nov 04.9215) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1112023Apr24,4.10,2024,11,4,22.115671,0.005868,-0.179263,18.873102,0.662972,0.004967,0.000626,-0.000001,0.000000 -93.3434,-19.5384,-155.84,-15.74,False TYC 6289-01799-1,18.84459190,-19.5666998,10.04,9.06,8.53,0.2,0,,18.86874870,-19.5384311,4.58,4.66,0,0,0 308,Polyxo,13.62,137.037,3.0080,0,0,3.904,1.94,,7.6,0 0,6.1923,2024,11,4,112.2431,181.5830,4.3626,0.03864,2.74960,2.64335,8.16,5.0,0.15 1.026,0.0073,0.0016,88,0.0016,Known errors,0.93,0,-1,-1 20241104_1799-1,60140.68 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 16:20 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org