IOTA/IOTA-ES occultation update for (4708) Polydoros / TYC 6330-00253-1 event on 2023 Jun 11, 01:27 UT Visible from Africa, South America Summary ------- On 2023 Jun 11 UT, the 55 km diameter asteroid (4708) Polydoros will occult a 11.0 mag star in the constellation Capricornus for observers along a path across Africa, South America. In the case of an occultation, the combined light of the asteroid and the star will drop by 6.57 mag to 17.52 mag (the magnitude of the asteroid) for at most 7.480 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: 72 * date and approx. time of event: 2023 Jun 11, 01:13 - 2023 Jun 11, 01:43 * geocentric midpoint of event [JD]: 2460106.56154063 * magnitude of target star: 10.95 * magnitude drop [mag]: 6.57 * estimated maximum duration [s]: 7.480 * Moon: 46 % sunlit, 48° distance * Sun: 133° distance * rough path description: Africa, South America Additional comments ------------------- RUWE high The occultation path -------------------- * approximate projected width [km]: 55 * 1 sigma uncertainty interval [path widths]: +/- 0.80 * 1 sigma uncertainty interval [seconds]: +/- 12.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.029, +/- 0.012) * 1 sigma uncertainty ellipse (major, minor, PA): (0.031", 0.004", 69°) * approx speed of asteroid's shadow [km/s]: 7.3525 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6330-00253-1 by 4708 Polydoros on 2023 Jun 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 - 66 0 0 - 0 55 17 1 43 0.5 1 106 -45 - 0 39 42 - 1 10 52 - 0 14 46 - 1 35 49 .... - 65 0 0 - 1 13 0 1 43 0.2 2 106 -46 - 0 57 25 - 1 28 36 - 0 32 29 - 1 53 34 0.11 - 64 0 0 - 1 30 47 1 42 59.6 3 106 -47 - 1 15 12 - 1 46 23 - 0 50 16 - 2 11 21 0.09 - 63 0 0 - 1 48 38 1 42 58.7 4 106 -48 - 1 33 2 - 2 4 14 - 1 8 5 - 2 29 12 0.09 - 62 0 0 - 2 6 30 1 42 57.5 5 106 -49 - 1 50 54 - 2 22 7 - 1 25 58 - 2 47 5 0.08 - 61 0 0 - 2 24 25 1 42 56.0 6 106 -50 - 2 8 49 - 2 40 2 - 1 43 52 - 3 5 1 0.08 - 60 0 0 - 2 42 22 1 42 54.2 7 106 -51 - 2 26 46 - 2 57 59 - 2 1 49 - 3 22 58 0.08 - 59 0 0 - 3 0 21 1 42 52.2 8 106 -52 - 2 44 45 - 3 15 58 - 2 19 47 - 3 40 57 0.08 - 58 0 0 - 3 18 21 1 42 49.9 9 106 -53 - 3 2 44 - 3 33 58 - 2 37 47 - 3 58 57 0.08 - 57 0 0 - 3 36 21 1 42 47.3 10 106 -54 - 3 20 45 - 3 51 58 - 2 55 47 - 4 16 58 0.08 - 56 0 0 - 3 54 22 1 42 44.4 11 106 -55 - 3 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38 56 -14 59 6 0.08 105 0 0 -14 4 16 1 14 57.7 19 257 24 -13 48 50 -14 19 42 -13 24 10 -14 44 23 0.08 106 0 0 -13 49 20 1 14 53.0 18 257 25 -13 33 54 -14 4 46 -13 9 13 -14 29 29 0.08 107 0 0 -13 34 13 1 14 48.6 17 257 26 -13 18 46 -13 49 40 -12 54 4 -14 14 24 0.08 108 0 0 -13 18 55 1 14 44.5 16 256 27 -13 3 27 -13 34 22 -12 38 44 -13 59 7 0.08 109 0 0 -13 3 26 1 14 40.6 15 256 27 -12 47 58 -13 18 54 -12 23 13 -13 43 40 0.08 110 0 0 -12 47 46 1 14 36.9 14 256 28 -12 32 17 -13 3 15 -12 7 32 -13 28 2 0.08 111 0 0 -12 31 56 1 14 33.4 13 256 29 -12 16 27 -12 47 26 -11 51 41 -13 12 13 0.08 112 0 0 -12 15 56 1 14 30.3 12 256 30 -12 0 26 -12 31 26 -11 35 39 -12 56 15 0.08 113 0 0 -11 59 46 1 14 27.3 11 255 31 -11 44 15 -12 15 17 -11 19 27 -12 40 6 0.08 114 0 0 -11 43 26 1 14 24.6 10 255 32 -11 27 55 -11 58 58 -11 3 6 -12 23 48 0.09 115 0 0 -11 26 57 1 14 22.2 9 255 33 -11 11 25 -11 42 29 -10 46 36 -12 7 21 0.09 116 0 0 -11 10 19 1 14 20.1 8 255 34 -10 54 47 -11 25 51 -10 29 56 -11 50 44 0.09 117 0 0 -10 53 32 1 14 18.2 7 255 35 -10 37 59 -11 9 5 -10 13 8 -11 33 58 0.09 118 0 0 -10 36 36 1 14 16.5 6 254 36 -10 21 3 -10 52 10 - 9 56 11 -11 17 4 0.10 119 0 0 -10 19 32 1 14 15.2 5 254 37 -10 3 59 -10 35 7 - 9 39 6 -11 0 1 0.10 120 0 0 -10 2 21 1 14 14.1 3 254 38 - 9 46 46 -10 17 55 - 9 21 52 -10 42 51 0.11 121 0 0 - 9 45 1 1 14 13.3 2 254 39 - 9 29 26 -10 0 36 - 9 4 32 -10 25 33 0.13 122 0 0 - 9 27 34 1 14 12.8 1 254 40 - 9 11 59 - 9 43 10 - 8 47 4 -10 8 7 0.17 123 0 0 - 9 10 1 1 14 12.5 0 254 41 - 8 54 25 - 9 25 36 - 8 29 29 - 9 50 34 0.42 Uncertainty in time = +/- 13 secs Prediction of 2023 Apr 29.2 Data for the target star ------------------------ * name: TYC 6330-00253-1 * constellation : Capricornus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 20 32 22.6845 DE: -16 22 01.637 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 20 32 22.6846 DE: -16 22 01.637 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.500,0.400) * V mag [mag]: 11.0 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (4708) Polydoros asteroid class: approx. diameter [km]: 55 approx. diameter ["]: 0.017 distance from Earth [AU]: 4.45660 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#46 date of fit: 2023 Apr 25 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): 0.031", 0.004", 69.209° remarks: * orbital elements for (4708)Polydoros : Mean anomaly = 280.4241656594 deg Arg. of pericenter = 103.6708614227 deg Long. of node = 281.1636070344 deg Inclination = 6.9911898002 deg Eccentricity = 0.0611979751 Semimajor axis = 5.2434198333 AU Perihelion dist = 4.9225331567 AU Mag: H = 10.14, G = 0.15 Epoch of elements : MJD 60106.06090278 TDT (2023 Jun 11.0609) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#462023Apr25,7.48,2023,6,11,1.476975,-0.007084,-0.087783,-4.138230,0.312055,-0.004079,-0.001210,0.000001,0.000000 27.1331,-16.2878,157.73,23.05,False TYC 6330-00253-1,20.53963458,-16.3671214,0.00,10.95,0.00,0.0,0,,20.56177170,-16.2877712,6.57,0.00,0,0,0 4708,Polydoros,17.52,55.0,4.4566,0,0,-0.567,0.62,,5.4,0 0,280.3371,2023,6,10,103.6709,281.1636,6.9912,0.06120,5.24342,4.92253,10.12,5.0,0.15 1.800,0.0307,0.0044,69,0.0136,Known errors,-1.00,-1,-1,-1 20230611_0253-1,60063.19 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Apr 29, 04:38 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org