IOTA/IOTA-ES occultation update for (142) Polana / TYC 5804-01179-1 event on 2023 Nov 25, 17:15 UT Visible from Africa Summary ------- On 2023 Nov 25 UT, the 54.4 km diameter asteroid (142) Polana will occult a 11.2 mag star in the constellation Aquarius for observers along a path across Africa. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.23 mag to 15.40 mag (the magnitude of the asteroid) for at most 3.320 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: 2023 Nov 25, 17:08 - 2023 Nov 25, 17:21 * geocentric midpoint of event [JD]: 2460274.21887796 * magnitude of target star: 11.19 * magnitude drop [mag]: 4.23 * estimated maximum duration [s]: 3.320 * Moon: 97 % sunlit, 68° distance * Sun: 92° distance * rough path description: Africa The occultation path -------------------- * approximate projected width [km]: 54 * 1 sigma uncertainty interval [path widths]: +/- 0.02 * 1 sigma uncertainty interval [seconds]: +/- 0.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.006, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.006", 0.000", 67°) * approx speed of asteroid's shadow [km/s]: 16.3748 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5804-01179-1 by 142 Polana on 2023 Nov 25 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 - 78 0 0 -18 4 44 17 8 41.1 0 98 86 -18 19 38 -17 49 51 -18 20 9 -17 49 19 .... - 77 0 0 -18 12 38 17 8 41.2 1 98 86 -18 27 30 -17 57 45 -18 28 2 -17 57 13 0.04 - 76 0 0 -18 20 11 17 8 41.4 2 97 85 -18 35 3 -18 5 19 -18 35 34 -18 4 47 0.01 - 75 0 0 -18 27 24 17 8 41.7 3 97 84 -18 42 15 -18 12 32 -18 42 47 -18 12 1 0.00 - 74 0 0 -18 34 17 17 8 42.1 4 97 83 -18 49 7 -18 19 26 -18 49 39 -18 18 54 0.00 - 73 0 0 -18 40 49 17 8 42.6 5 96 83 -18 55 39 -18 25 59 -18 56 10 -18 25 27 0.00 - 72 0 0 -18 47 1 17 8 43.2 6 96 82 -19 1 50 -18 32 11 -19 2 22 -18 31 40 -0.01 - 71 0 0 -18 52 52 17 8 43.9 7 96 81 -19 7 41 -18 38 3 -19 8 12 -18 37 32 -0.01 - 70 0 0 -18 58 23 17 8 44.7 8 95 80 -19 13 11 -18 43 34 -19 13 43 -18 43 3 -0.01 - 69 0 0 -19 3 33 17 8 45.7 9 95 79 -19 18 21 -18 48 45 -19 18 52 -18 48 14 -0.01 - 68 0 0 -19 8 22 17 8 46.7 10 95 78 -19 23 10 -18 53 35 -19 23 41 -18 53 3 -0.01 - 67 0 0 -19 12 51 17 8 47.8 11 94 77 -19 27 38 -18 58 4 -19 28 9 -18 57 32 -0.01 - 66 0 0 -19 16 59 17 8 49.1 12 94 76 -19 31 45 -19 2 12 -19 32 17 -19 1 41 -0.01 - 65 0 0 -19 20 45 17 8 50.4 13 94 75 -19 35 32 -19 5 59 -19 36 3 -19 5 28 -0.01 - 64 0 0 -19 24 11 17 8 51.9 14 93 74 -19 38 57 -19 9 25 -19 39 29 -19 8 54 -0.01 - 63 0 0 -19 27 16 17 8 53.5 14 93 73 -19 42 2 -19 12 31 -19 42 33 -19 11 59 -0.01 - 62 0 0 -19 30 0 17 8 55.1 15 93 73 -19 44 46 -19 15 15 -19 45 17 -19 14 44 -0.01 - 61 0 0 -19 32 23 17 8 56.9 16 92 72 -19 47 9 -19 17 38 -19 47 40 -19 17 7 -0.01 - 60 0 0 -19 34 25 17 8 58.8 17 92 71 -19 49 10 -19 19 40 -19 49 41 -19 19 9 -0.02 - 59 0 0 -19 36 6 17 9 0.8 18 92 70 -19 50 51 -19 21 21 -19 51 22 -19 20 50 -0.02 - 58 0 0 -19 37 25 17 9 2.8 19 91 69 -19 52 10 -19 22 40 -19 52 41 -19 22 9 -0.02 - 57 0 0 -19 38 24 17 9 5.0 20 91 68 -19 53 8 -19 23 39 -19 53 39 -19 23 8 -0.02 - 56 0 0 -19 39 1 17 9 7.3 21 91 67 -19 53 45 -19 24 16 -19 54 16 -19 23 45 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25 -0.01 57 0 0 9 55 47 17 20 2.4 41 251 -50 9 40 11 10 11 23 9 39 38 10 11 56 -0.01 58 0 0 10 16 6 17 20 7.1 40 251 -51 10 0 31 10 31 41 9 59 58 10 32 14 -0.01 59 0 0 10 36 12 17 20 11.7 39 251 -52 10 20 38 10 51 47 10 20 5 10 52 19 -0.01 60 0 0 10 56 5 17 20 16.2 38 251 -53 10 40 32 11 11 38 10 39 59 11 12 11 -0.01 61 0 0 11 15 43 17 20 20.6 37 251 -54 11 0 11 11 31 15 10 59 38 11 31 48 -0.01 62 0 0 11 35 7 17 20 24.8 36 252 -56 11 19 36 11 50 38 11 19 3 11 51 11 -0.01 63 0 0 11 54 16 17 20 29.0 35 252 -57 11 38 46 12 9 46 11 38 13 12 10 19 -0.01 64 0 0 12 13 10 17 20 33.0 34 252 -58 11 57 41 12 28 39 11 57 8 12 29 12 -0.01 65 0 0 12 31 49 17 20 36.9 33 252 -59 12 16 21 12 47 17 12 15 48 12 47 49 -0.01 66 0 0 12 50 12 17 20 40.7 32 252 -60 12 34 45 13 5 38 12 34 12 13 6 11 -0.01 67 0 0 13 8 19 17 20 44.3 31 253 -61 12 52 53 13 23 44 12 52 20 13 24 17 -0.01 68 0 0 13 26 9 17 20 47.9 30 253 -62 13 10 45 13 41 34 13 10 12 13 42 6 -0.01 69 0 0 13 43 43 17 20 51.3 29 253 -63 13 28 20 13 59 7 13 27 48 13 59 39 -0.01 70 0 0 14 1 1 17 20 54.6 28 253 -64 13 45 39 14 16 23 13 45 6 14 16 56 -0.01 71 0 0 14 18 1 17 20 57.8 27 254 -65 14 2 40 14 33 22 14 2 8 14 33 55 -0.01 72 0 0 14 34 44 17 21 0.9 26 254 -66 14 19 24 14 50 4 14 18 52 14 50 37 -0.01 73 0 0 14 51 10 17 21 3.8 25 254 -67 14 35 51 15 6 29 14 35 18 15 7 1 -0.01 74 0 0 15 7 17 17 21 6.7 24 254 -68 14 52 0 15 22 35 14 51 27 15 23 8 -0.01 75 0 0 15 23 7 17 21 9.4 23 255 -69 15 7 51 15 38 24 15 7 19 15 38 56 -0.01 76 0 0 15 38 39 17 21 12.0 22 255 -70 15 23 24 15 53 55 15 22 51 15 54 27 -0.01 77 0 0 15 53 53 17 21 14.5 21 255 -71 15 38 38 16 9 7 15 38 6 16 9 39 -0.01 78 0 0 16 8 48 17 21 16.8 20 255 -72 15 53 35 16 24 1 15 53 2 16 24 33 -0.01 79 0 0 16 23 24 17 21 19.1 19 256 -73 16 8 12 16 38 36 16 7 40 16 39 8 -0.01 80 0 0 16 37 42 17 21 21.2 18 256 -74 16 22 31 16 52 53 16 21 59 16 53 25 -0.01 81 0 0 16 51 41 17 21 23.2 17 256 -75 16 36 31 17 6 51 16 35 59 17 7 23 -0.01 82 0 0 17 5 20 17 21 25.1 16 257 -76 16 50 12 17 20 29 16 49 40 17 21 1 -0.01 83 0 0 17 18 41 17 21 26.8 15 257 -77 17 3 33 17 33 49 17 3 1 17 34 21 -0.01 84 0 0 17 31 42 17 21 28.5 14 257 -78 17 16 36 17 46 49 17 16 4 17 47 21 -0.01 85 0 0 17 44 24 17 21 30.0 13 258 -79 17 29 18 17 59 30 17 28 47 18 0 2 -0.01 86 0 0 17 56 46 17 21 31.5 12 258 -80 17 41 42 18 11 51 17 41 10 18 12 23 -0.01 87 0 0 18 8 49 17 21 32.8 11 258 -81 17 53 46 18 23 53 17 53 14 18 24 25 -0.01 88 0 0 18 20 32 17 21 34.0 10 258 -82 18 5 30 18 35 35 18 4 58 18 36 7 -0.01 89 0 0 18 31 56 17 21 35.0 9 259 -83 18 16 54 18 46 57 18 16 22 18 47 29 0.00 90 0 0 18 42 59 17 21 36.0 8 259 -83 18 27 58 18 58 0 18 27 27 18 58 32 0.00 91 0 0 18 53 43 17 21 36.8 7 259 -84 18 38 43 19 8 42 18 38 11 19 9 14 0.00 92 0 0 19 4 6 17 21 37.6 6 260 -85 18 49 8 19 19 5 18 48 36 19 19 37 0.00 93 0 0 19 14 10 17 21 38.2 5 260 -86 18 59 12 19 29 8 18 58 40 19 29 40 0.00 94 0 0 19 23 53 17 21 38.7 4 260 -87 19 8 56 19 38 51 19 8 25 19 39 22 0.00 95 0 0 19 33 17 17 21 39.2 3 261 -88 19 18 21 19 48 13 19 17 49 19 48 45 0.00 96 0 0 19 42 20 17 21 39.5 2 261 -88 19 27 25 19 57 15 19 26 53 19 57 47 0.01 97 0 0 19 51 3 17 21 39.6 1 261 -88 19 36 8 20 5 58 19 35 37 20 6 29 0.02 98 0 0 19 59 26 17 21 39.7 0 262 -88 19 44 32 20 14 20 19 44 0 20 14 51 0.14 Uncertainty in time = +/- 1 secs Prediction of 2023 Oct 15.9 Data for the target star ------------------------ * name: TYC 5804-01179-1 * constellation : Aquarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 22 22 22.5026 DE: -07 45 57.674 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 22 22 22.5021 DE: -07 45 57.677 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.2 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (142) Polana asteroid class: approx. diameter [km]: 54 approx. diameter ["]: 0.031 distance from Earth [AU]: 2.39540 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#67 date of fit: 2023 Oct 09 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): 0.006", 0.000", 66.891° remarks: * orbital elements for (142)Polana : Mean anomaly = 121.8469254233 deg Arg. of pericenter = 291.7727454749 deg Long. of node = 291.1995277230 deg Inclination = 2.2388118551 deg Eccentricity = 0.1341302528 Semimajor axis = 2.4186183546 AU Perihelion dist = 2.0942084633 AU Mag: H = 10.60, G = 0.15 Epoch of elements : MJD 60273.71895833 TDT (2023 Nov 25.7190) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#672023Oct09,3.32,2023,11,25,17.253071,-0.004222,0.016833,8.733346,3.024897,0.005422,0.002107,0.000000,0.000000 12.7193,-7.6462,-82.05,-20.79,False TYC 5804-01179-1,22.37291740,-7.7660205,0.00,11.19,0.00,0.0,0,,22.39370648,-7.6461817,4.24,0.00,0,0,0 142,Polana,15.40,54.400,2.3954,0,0,2.157,11.11,,3.4,0 0,121.6585,2023,11,25,291.7727,291.1995,2.2388,0.13413,2.41862,2.09421,10.35,5.0,0.15 1.018,0.0063,0.0003,67,0.0063,Known errors,-1.00,0,-1,-1 20231125_1179-1,60232.88 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Oct 15, 21:09 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org