IOTA/IOTA-ES occultation update for (476) Hedwig / UCAC4-583-036943 event on 2023 Sep 27, 23:29 UT Visible from India Summary ------- On 2023 Sep 27 UT, the 121.7 km diameter asteroid (476) Hedwig will occult a 12.3 mag star in the constellation Gemini for observers along a path across India. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.03 mag to 14.19 mag (the magnitude of the asteroid) for at most 5.860 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 Sep 27, 23:24 - 2023 Sep 27, 23:34 * geocentric midpoint of event [JD]: 2460215.47887833 * magnitude of target star: 12.34 * magnitude drop [mag]: 2.03 * estimated maximum duration [s]: 5.860 * Moon: 97 % sunlit, 122° distance * Sun: 79° distance * rough path description: India Additional comments ------------------- RUWE The occultation path -------------------- * approximate projected width [km]: 127 * 1 sigma uncertainty interval [path widths]: +/- 0.02 * 1 sigma uncertainty interval [seconds]: +/- 0.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.006, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.006", 0.000", 109°) * approx speed of asteroid's shadow [km/s]: 20.7760 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4-583-036943 by 476 Hedwig on 2023 Sep 27 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 22 0 0 .. .. .... .. .. .. .. .. .. .. .. .. - 4 2 35 .. .. .. - 4 1 16 .... 23 0 0 - 4 10 48 23 24 39.8 1 63 -73 - 4 49 5 - 3 32 40 - 4 50 25 - 3 31 20 .... 24 0 0 - 3 41 5 23 24 39.9 2 63 -72 - 4 19 17 - 3 3 1 - 4 20 37 - 3 1 42 0.12 25 0 0 - 3 11 40 23 24 40.2 3 63 -71 - 3 49 47 - 2 33 41 - 3 51 7 - 2 32 22 0.18 26 0 0 - 2 42 34 23 24 40.6 4 63 -70 - 3 20 36 - 2 4 39 - 3 21 56 - 2 3 20 0.20 27 0 0 - 2 13 47 23 24 41.1 5 63 -69 - 2 51 44 - 1 35 57 - 2 53 3 - 1 34 38 0.22 28 0 0 - 1 45 19 23 24 41.8 6 63 -68 - 2 23 12 - 1 7 35 - 2 24 31 - 1 6 16 0.23 29 0 0 - 1 17 13 23 24 42.5 8 63 -67 - 1 55 0 - 0 39 33 - 1 56 19 - 0 38 14 0.23 30 0 0 - 0 49 28 23 24 43.4 9 63 -66 - 1 27 10 - 0 11 53 - 1 28 29 - 0 10 35 0.24 31 0 0 - 0 22 4 23 24 44.4 10 63 -65 - 0 59 41 0 15 25 - 1 1 0 0 16 43 0.24 32 0 0 0 4 56 23 24 45.5 11 63 -64 - 0 32 35 0 42 21 - 0 33 54 0 43 39 0.25 33 0 0 0 31 34 23 24 46.7 12 63 -64 - 0 5 52 1 8 53 - 0 7 11 1 10 11 0.25 34 0 0 0 57 48 23 24 48.0 13 63 -63 0 20 27 1 35 2 0 19 9 1 36 20 0.25 35 0 0 1 23 38 23 24 49.4 14 63 -62 0 46 22 2 0 46 0 45 4 2 2 4 0.26 36 0 0 1 49 3 23 24 51.0 15 63 -61 1 11 53 2 26 6 1 10 35 2 27 24 0.26 37 0 0 2 14 3 23 24 52.6 16 63 -60 1 36 59 2 51 1 1 35 41 2 52 18 0.26 38 0 0 2 38 38 23 24 54.4 17 63 -59 2 1 38 3 15 30 2 0 21 3 16 47 0.26 39 0 0 3 2 46 23 24 56.2 19 63 -58 2 25 52 3 39 33 2 24 35 3 40 50 0.26 40 0 0 3 26 28 23 24 58.2 20 63 -56 2 49 40 4 3 10 2 48 23 4 4 27 0.26 41 0 0 3 49 44 23 25 0.3 21 63 -55 3 13 0 4 26 20 3 11 43 4 27 36 0.26 42 0 0 4 12 32 23 25 2.4 22 63 -54 3 35 54 4 49 3 3 34 37 4 50 19 0.26 43 0 0 4 34 52 23 25 4.7 23 63 -53 3 58 19 5 11 18 3 57 3 5 12 34 0.27 44 0 0 4 56 45 23 25 7.1 24 63 -52 4 20 17 5 33 5 4 19 1 5 34 21 0.27 45 0 0 5 18 9 23 25 9.5 25 63 -51 4 41 47 5 54 25 4 40 31 5 55 40 0.27 46 0 0 5 39 5 23 25 12.1 26 63 -50 5 2 48 6 15 16 5 1 32 6 16 31 0.27 47 0 0 5 59 33 23 25 14.7 27 63 -49 5 23 21 6 35 38 5 22 5 6 36 53 0.27 48 0 0 6 19 31 23 25 17.4 28 63 -48 5 43 24 6 55 31 5 42 8 6 56 46 0.27 49 0 0 6 39 0 23 25 20.2 29 63 -47 6 2 58 7 14 55 6 1 42 7 16 10 0.27 50 0 0 6 57 59 23 25 23.1 30 63 -46 6 22 2 7 33 50 6 20 47 7 35 5 0.27 51 0 0 7 16 29 23 25 26.1 31 63 -45 6 40 37 7 52 15 6 39 22 7 53 30 0.27 52 0 0 7 34 29 23 25 29.2 32 63 -44 6 58 42 8 10 10 6 57 27 8 11 25 0.27 53 0 0 7 52 0 23 25 32.3 33 63 -43 7 16 17 8 27 36 7 15 2 8 28 50 0.27 54 0 0 8 8 59 23 25 35.6 34 63 -42 7 33 21 8 44 31 7 32 7 8 45 45 0.27 55 0 0 8 25 29 23 25 38.9 35 63 -41 7 49 55 9 0 56 7 48 41 9 2 10 0.27 56 0 0 8 41 28 23 25 42.2 36 63 -40 8 5 59 9 16 51 8 4 45 9 18 5 0.27 57 0 0 8 56 57 23 25 45.7 37 63 -39 8 21 32 9 32 15 8 20 18 9 33 29 0.27 58 0 0 9 11 55 23 25 49.2 38 63 -38 8 36 34 9 47 9 8 35 20 9 48 23 0.27 59 0 0 9 26 22 23 25 52.8 39 63 -37 8 51 5 10 1 32 8 49 51 10 2 46 0.28 60 0 0 9 40 18 23 25 56.5 40 63 -36 9 5 5 10 15 24 9 3 51 10 16 38 0.28 61 0 0 9 53 43 23 26 0.2 41 63 -35 9 18 34 10 28 46 9 17 20 10 29 59 0.28 62 0 0 10 6 37 23 26 4.0 42 63 -34 9 31 31 10 41 36 9 30 18 10 42 49 0.28 63 0 0 10 18 59 23 26 7.9 43 63 -33 9 43 58 10 53 55 9 42 44 10 55 8 0.28 64 0 0 10 30 51 23 26 11.8 44 63 -32 9 55 53 11 5 43 9 54 39 11 6 56 0.28 65 0 0 10 42 11 23 26 15.8 45 63 -31 10 7 16 11 17 0 10 6 3 11 18 13 0.28 66 0 0 10 53 0 23 26 19.8 46 63 -30 10 18 8 11 27 46 10 16 55 11 28 59 0.28 67 0 0 11 3 18 23 26 24.0 47 63 -29 10 28 29 11 38 1 10 27 16 11 39 13 0.28 68 0 0 11 13 4 23 26 28.1 48 63 -28 10 38 18 11 47 44 10 37 5 11 48 57 0.28 69 0 0 11 22 19 23 26 32.3 49 62 -27 10 47 35 11 56 56 10 46 23 11 58 8 0.28 70 0 0 11 31 2 23 26 36.6 50 62 -26 10 56 21 12 5 37 10 55 9 12 6 49 0.28 71 0 0 11 39 14 23 26 40.9 51 62 -25 11 4 35 12 13 46 11 3 23 12 14 58 0.28 72 0 0 11 46 54 23 26 45.3 52 62 -24 11 12 18 12 21 24 11 11 5 12 22 36 0.28 73 0 0 11 54 2 23 26 49.7 53 61 -23 11 19 29 12 28 30 11 18 16 12 29 42 0.28 74 0 0 12 0 39 23 26 54.2 54 61 -22 11 26 8 12 35 5 11 24 55 12 36 17 0.28 75 0 0 12 6 45 23 26 58.8 55 61 -21 11 32 15 12 41 9 11 31 2 12 42 21 0.28 76 0 0 12 12 19 23 27 3.3 56 60 -20 11 37 50 12 46 41 11 36 38 12 47 53 0.28 77 0 0 12 17 21 23 27 8.0 57 60 -19 11 42 54 12 51 42 11 41 42 12 52 53 0.28 78 0 0 12 21 51 23 27 12.6 57 60 -18 11 47 25 12 56 11 11 46 13 12 57 22 0.28 79 0 0 12 25 50 23 27 17.3 58 59 -17 11 51 25 13 0 8 11 50 13 13 1 20 0.28 80 0 0 12 29 17 23 27 22.1 59 59 -16 11 54 53 13 3 34 11 53 41 13 4 46 0.28 81 0 0 12 32 12 23 27 26.9 60 58 -15 11 57 50 13 6 29 11 56 38 13 7 40 0.28 82 0 0 12 34 36 23 27 31.7 61 57 -14 12 0 14 13 8 51 11 59 2 13 10 3 0.28 83 0 0 12 36 27 23 27 36.6 62 57 -13 12 2 6 13 10 43 12 0 54 13 11 54 0.28 84 0 0 12 37 47 23 27 41.5 63 56 -12 12 3 27 13 12 2 12 2 15 13 13 14 0.28 85 0 0 12 38 36 23 27 46.4 63 55 -11 12 4 15 13 12 51 12 3 3 13 14 2 0.28 86 0 0 12 38 52 23 27 51.4 64 54 -10 12 4 32 13 13 7 12 3 20 13 14 19 0.28 87 0 0 12 38 37 23 27 56.4 65 53 -9 12 4 16 13 12 52 12 3 4 13 14 3 0.28 88 0 0 12 37 50 23 28 1.5 66 52 -8 12 3 29 13 12 5 12 2 17 13 13 17 0.28 89 0 0 12 36 31 23 28 6.6 67 50 -7 12 2 10 13 10 47 12 0 58 13 11 58 0.28 90 0 0 12 34 40 23 28 11.7 67 49 -6 12 0 18 13 8 57 11 59 6 13 10 8 0.28 91 0 0 12 32 18 23 28 16.8 68 48 -5 11 57 55 13 6 35 11 56 43 13 7 46 0.28 92 0 0 12 29 23 23 28 22.0 69 46 -4 11 55 0 13 3 41 11 53 47 13 4 53 0.28 93 0 0 12 25 57 23 28 27.2 69 44 -3 11 51 32 13 0 16 11 50 20 13 1 28 0.28 94 0 0 12 21 59 23 28 32.4 70 42 -2 11 47 33 12 56 19 11 46 20 12 57 31 0.28 95 0 0 12 17 29 23 28 37.7 71 40 -1 11 43 1 12 51 50 11 41 49 12 53 2 0.28 96 0 0 12 12 27 23 28 42.9 71 38 0 11 37 57 12 46 50 11 36 45 12 48 2 0.28 97 0 0 12 6 53 23 28 48.2 72 36 1 11 32 22 12 41 18 11 31 9 12 42 29 0.28 98 0 0 12 0 47 23 28 53.6 72 33 2 11 26 14 12 35 14 11 25 2 12 36 25 0.28 99 0 0 11 54 9 23 28 58.9 73 31 3 11 19 34 12 28 38 11 18 22 12 29 50 0.28 100 0 0 11 46 59 23 29 4.3 73 28 4 11 12 22 12 21 30 11 11 9 12 22 42 0.28 101 0 0 11 39 17 23 29 9.7 73 25 5 11 4 38 12 13 51 11 3 25 12 15 3 0.28 102 0 0 11 31 4 23 29 15.1 74 22 6 10 56 21 12 5 40 10 55 9 12 6 52 0.28 103 0 0 11 22 18 23 29 20.5 74 19 7 10 47 33 11 56 57 10 46 20 11 58 9 0.28 104 0 0 11 13 0 23 29 25.9 74 15 8 10 38 13 11 47 42 10 37 0 11 48 54 0.28 105 0 0 11 3 11 23 29 31.4 74 12 9 10 28 20 11 37 55 10 27 7 11 39 8 0.28 106 0 0 10 52 49 23 29 36.8 74 9 10 10 17 55 11 27 37 10 16 42 11 28 49 0.28 107 0 0 10 41 56 23 29 42.3 74 5 11 10 6 59 11 16 47 10 5 45 11 17 59 0.28 108 0 0 10 30 30 23 29 47.8 74 2 12 9 55 30 11 5 25 9 54 16 11 6 37 0.28 109 0 0 10 18 33 23 29 53.2 74 359 13 9 43 29 10 53 31 9 42 16 10 54 44 0.28 110 0 0 10 6 4 23 29 58.7 73 355 14 9 30 56 10 41 6 9 29 43 10 42 19 0.28 111 0 0 9 53 3 23 30 4.2 73 352 15 9 17 51 10 28 9 9 16 38 10 29 22 0.28 112 0 0 9 39 31 23 30 9.7 73 349 16 9 4 15 10 14 40 9 3 1 10 15 53 0.28 113 0 0 9 25 26 23 30 15.2 72 347 17 8 50 6 10 0 40 8 48 52 10 1 53 0.28 114 0 0 9 10 50 23 30 20.7 72 344 18 8 35 26 9 46 8 8 34 12 9 47 22 0.28 115 0 0 8 55 43 23 30 26.2 71 341 19 8 20 14 9 31 5 8 19 0 9 32 18 0.28 116 0 0 8 40 4 23 30 31.7 71 339 20 8 4 31 9 15 30 8 3 16 9 16 44 0.28 117 0 0 8 23 53 23 30 37.2 70 337 21 7 48 16 8 59 24 7 47 1 9 0 38 0.28 118 0 0 8 7 12 23 30 42.7 69 335 22 7 31 30 8 42 47 7 30 15 8 44 2 0.28 119 0 0 7 49 59 23 30 48.2 69 333 23 7 14 12 8 25 39 7 12 57 8 26 54 0.28 120 0 0 7 32 15 23 30 53.7 68 331 24 6 56 23 8 8 0 6 55 8 8 9 15 0.28 121 0 0 7 14 0 23 30 59.1 67 329 26 6 38 3 7 49 50 6 36 48 7 51 5 0.28 122 0 0 6 55 15 23 31 4.6 66 328 27 6 19 13 7 31 10 6 17 57 7 32 25 0.28 123 0 0 6 35 59 23 31 10.0 66 326 28 5 59 52 7 11 59 5 58 36 7 13 14 0.28 124 0 0 6 16 12 23 31 15.4 65 325 29 5 40 0 6 52 18 5 38 44 6 53 33 0.28 125 0 0 5 55 56 23 31 20.8 64 324 30 5 19 38 6 32 6 5 18 22 6 33 22 0.28 126 0 0 5 35 9 23 31 26.1 63 323 31 4 58 46 6 11 25 4 57 30 6 12 41 0.28 127 0 0 5 13 53 23 31 31.4 62 322 32 4 37 24 5 50 14 4 36 8 5 51 30 0.28 128 0 0 4 52 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49 55 -19 31 10 -20 51 17 -19 29 48 0.27 179 0 0 -20 42 40 23 34 28.4 6 301 71 -21 22 5 -20 3 23 -21 23 28 -20 2 1 0.27 180 0 0 -21 14 40 23 34 29.0 5 301 70 -21 54 4 -20 35 25 -21 55 26 -20 34 3 0.27 -179 0 0 -21 46 29 23 34 29.4 4 301 70 -22 25 50 -21 7 15 -22 27 13 -21 5 53 0.27 -178 0 0 -22 18 4 23 34 29.8 3 300 69 -22 57 24 -21 38 52 -22 58 46 -21 37 30 0.27 -177 0 0 -22 49 25 23 34 30.0 2 300 69 -23 28 43 -22 10 16 -23 30 5 -22 8 54 0.26 -176 0 0 -23 20 32 23 34 30.2 1 299 69 -23 59 47 -22 41 25 -24 1 9 -22 40 3 0.24 -175 0 0 .. .. .... .. .. .. .. .. .. .. .. .. -23 12 19 .. .. .. -23 10 57 .... Uncertainty in time = +/- 1 secs Prediction of 2023 Aug 27.0 Data for the target star ------------------------ * name: UCAC4-583-036943 * constellation : Gemini * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 07 08 40.8763 DE: +26 30 10.089 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 07 08 40.8764 DE: +26 30 10.089 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.300) * V mag [mag]: 12.3 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (476) Hedwig asteroid class: ShapeModel approx. diameter [km]: 122 approx. diameter ["]: 0.059 distance from Earth [AU]: 2.84540 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#126 date of fit: 2023 Aug 23 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", 108.956° remarks: * orbital elements for (476)Hedwig : Mean anomaly = 154.0271314704 deg Arg. of pericenter = 0.9466895375 deg Long. of node = 286.1842662041 deg Inclination = 10.9240870404 deg Eccentricity = 0.0746661904 Semimajor axis = 2.6492940339 AU Perihelion dist = 2.4514813411 AU Mag: H = 8.75, G = 0.15 Epoch of elements : MJD 60214.97875000 TDT (2023 Sep 27.9787) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1262023Aug23,5.86,2023,9,27,23.493080,-0.050701,-0.268327,11.521065,-2.185644,-0.005542,0.000748,0.000000,0.000000 108.6446,26.4657,-174.67,-1.83,False UCAC4-583-036943,7.14468783,26.5028027,0.00,12.34,0.00,0.0,0,,7.16894655,26.4657238,2.03,0.00,0,0,0 476,Hedwig,14.19,121.700,2.8454,0,0,2.652,-6.76,,6.8,0 0,153.8034,2023,9,27,0.9467,286.1843,10.9241,0.07467,2.64929,2.45148,8.65,5.0,0.15 1.017,0.0063,0.0005,109,0.0064,Known errors,-1.00,0,-1,-1 20230927_036943,60182.99 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Aug 26, 23:51 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org