IOTA/IOTA-ES occultation update for (11785) Migaic / UCAC4 413-059775 event on 2024 Dec 27, 08:28 UT Visible from Summary ------- On 2024 Dec 27 UT, the 16.569 km diameter asteroid (11785) Migaic will occult a 10.9 mag star in the constellation Virgo for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 7.55 mag to 18.42 mag (the magnitude of the asteroid) for at most 0.530 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: 98 * date and approx. time of event: 2024 Dec 27, 08:24 - 2024 Dec 27, 08:31 * geocentric midpoint of event [JD]: 2460671.85295458 * magnitude of target star: 10.87 * magnitude drop [mag]: 7.55 * estimated maximum duration [s]: 0.530 * Moon: 13 % sunlit, 23° distance * Sun: 63° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 17 * 1 sigma uncertainty interval [path widths]: +/- 0.34 * 1 sigma uncertainty interval [seconds]: +/- 1.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.013, +/- 0.007) * 1 sigma uncertainty ellipse (major, minor, PA): (0.014", 0.002", 117°) * approx speed of asteroid's shadow [km/s]: 31.3011 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 413-059775 by 11785 Migaic on 2024 Dec 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 - 97 0 0 12 1 42 8 24 53.0 1 98 -60 11 57 7 12 6 16 11 54 1 12 9 22 .... - 96 0 0 11 53 13 8 24 53.0 2 98 -59 11 48 39 11 57 47 11 45 32 12 0 54 0.11 - 95 0 0 11 44 24 8 24 53.2 3 98 -58 11 39 49 11 48 58 11 36 42 11 52 5 0.12 - 94 0 0 11 35 14 8 24 53.4 4 99 -57 11 30 39 11 39 48 11 27 31 11 42 56 0.12 - 93 0 0 11 25 43 8 24 53.6 5 99 -56 11 21 8 11 30 18 11 18 0 11 33 25 0.12 - 92 0 0 11 15 52 8 24 53.9 6 99 -56 11 11 17 11 20 27 11 8 9 11 23 35 0.12 - 91 0 0 11 5 41 8 24 54.3 7 99 -55 11 1 5 11 10 16 10 57 57 11 13 24 0.12 - 90 0 0 10 55 9 8 24 54.7 8 99 -54 10 50 33 10 59 45 10 47 25 11 2 53 0.12 - 89 0 0 10 44 17 8 24 55.3 9 99 -53 10 39 41 10 48 54 10 36 33 10 52 2 0.12 - 88 0 0 10 33 6 8 24 55.8 10 100 -52 10 28 29 10 37 42 10 25 21 10 40 50 0.12 - 87 0 0 10 21 34 8 24 56.4 11 100 -51 10 16 57 10 26 11 10 13 49 10 29 19 0.12 - 86 0 0 10 9 42 8 24 57.1 12 100 -50 10 5 5 10 14 19 10 1 56 10 17 28 0.12 - 85 0 0 9 57 31 8 24 57.9 13 100 -49 9 52 54 10 2 8 9 49 45 10 5 17 0.12 - 84 0 0 9 45 0 8 24 58.7 14 100 -48 9 40 22 9 49 38 9 37 13 9 52 47 0.12 - 83 0 0 9 32 10 8 24 59.6 15 101 -47 9 27 32 9 36 48 9 24 22 9 39 57 0.12 - 82 0 0 9 19 0 8 25 0.6 16 101 -46 9 14 22 9 23 38 9 11 12 9 26 48 0.12 - 81 0 0 9 5 31 8 25 1.6 17 101 -45 9 0 53 9 10 10 8 57 43 9 13 20 0.12 - 80 0 0 8 51 44 8 25 2.6 18 101 -44 8 47 5 8 56 23 8 43 55 8 59 32 0.12 - 79 0 0 8 37 37 8 25 3.8 19 101 -43 8 32 58 8 42 16 8 29 48 8 45 26 0.12 - 78 0 0 8 23 12 8 25 5.0 20 101 -42 8 18 32 8 27 51 8 15 22 8 31 2 0.12 - 77 0 0 8 8 28 8 25 6.3 21 101 -41 8 3 48 8 13 8 8 0 38 8 16 19 0.12 - 76 0 0 7 53 26 8 25 7.6 22 101 -40 7 48 46 7 58 6 7 45 35 8 1 17 0.12 - 75 0 0 7 38 6 8 25 9.0 23 102 -39 7 33 26 7 42 47 7 30 15 7 45 58 0.12 - 74 0 0 7 22 29 8 25 10.4 24 102 -38 7 17 48 7 27 9 7 14 36 7 30 21 0.12 - 73 0 0 7 6 33 8 25 12.0 25 102 -37 7 1 52 7 11 14 6 58 40 7 14 26 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44 53 0.12 67 0 0 -26 49 38 8 31 31.4 14 268 76 -26 54 9 -26 45 6 -26 57 14 -26 42 1 0.12 68 0 0 -26 46 26 8 31 32.1 13 268 75 -26 50 58 -26 41 55 -26 54 3 -26 38 50 0.12 69 0 0 -26 42 55 8 31 32.8 12 268 74 -26 47 27 -26 38 24 -26 50 32 -26 35 19 0.12 70 0 0 -26 39 5 8 31 33.5 11 267 74 -26 43 37 -26 34 33 -26 46 42 -26 31 28 0.12 71 0 0 -26 34 55 8 31 34.1 11 267 73 -26 39 27 -26 30 23 -26 42 32 -26 27 18 0.13 72 0 0 -26 30 25 8 31 34.7 10 266 72 -26 34 57 -26 25 53 -26 38 3 -26 22 48 0.13 73 0 0 -26 25 36 8 31 35.2 9 266 71 -26 30 8 -26 21 4 -26 33 14 -26 17 58 0.13 74 0 0 -26 20 28 8 31 35.7 8 265 70 -26 25 0 -26 15 55 -26 28 6 -26 12 50 0.13 75 0 0 -26 14 59 8 31 36.1 7 265 69 -26 19 32 -26 10 27 -26 22 38 -26 7 21 0.13 76 0 0 -26 9 12 8 31 36.4 6 264 68 -26 13 45 -26 4 39 -26 16 51 -26 1 33 0.13 77 0 0 -26 3 5 8 31 36.8 5 264 67 -26 7 38 -25 58 32 -26 10 44 -25 55 26 0.14 78 0 0 -25 56 39 8 31 37.0 4 264 67 -26 1 12 -25 52 6 -26 4 18 -25 49 0 0.14 79 0 0 -25 49 53 8 31 37.2 3 263 66 -25 54 27 -25 45 20 -25 57 33 -25 42 14 0.15 80 0 0 -25 42 48 8 31 37.4 2 263 65 -25 47 22 -25 38 15 -25 50 28 -25 35 8 0.16 81 0 0 -25 35 24 8 31 37.5 1 262 64 -25 39 58 -25 30 51 -25 43 5 -25 27 44 0.19 82 0 0 -25 27 41 8 31 37.6 1 262 63 -25 32 15 -25 23 7 -25 35 22 -25 20 0 0.30 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.8 Data for the target star ------------------------ * name: UCAC4 413-059775 * constellation : Virgo * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 14 11 40.3448 DE: -07 30 12.594 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 14 11 40.3449 DE: -07 30 12.595 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.400,0.300) * V mag [mag]: 10.9 * B mag [mag]: 11.1 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (11785) Migaic asteroid class: approx. diameter [km]: 17 approx. diameter ["]: 0.008 distance from Earth [AU]: 2.94410 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#48 date of fit: 2023 Apr 27 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): 0.014", 0.002", 116.628° remarks: * orbital elements for (11785)Migaic : Mean anomaly = 36.5410646600 deg Arg. of pericenter = 87.0723105424 deg Long. of node = 65.2684551655 deg Inclination = 7.7228860023 deg Eccentricity = 0.0651233138 Semimajor axis = 2.7808467500 AU Perihelion dist = 2.5997487945 AU Mag: H = 12.99, G = 0.15 Epoch of elements : MJD 60671.35295487 TDT (2024 Dec 27.3530) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#482023Apr27,0.53,2024,12,27,8.470910,-0.037526,-0.109706,16.723911,-5.695643,-0.004859,0.002002,-0.000001,0.000000 -10.1375,-7.6209,53.24,-23.30,False UCAC4 413-059775,14.19454018,-7.5034982,11.14,10.87,10.72,0.0,0,,14.21634970,-7.6208663,7.55,7.25,0,0,0 11785,Migaic,18.42,16.569,2.9441,0,0,3.361,-17.01,,1.0,0 0,36.4660,2024,12,27,87.0723,65.2685,7.7229,0.06512,2.78085,2.59975,12.99,5.0,0.15 1.341,0.0143,0.0018,117,0.0027,Known errors,2.39,0,-1,-1 20241227_059775,60140.76 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 18:09 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org