IOTA/IOTA-ES occultation update for (14) Irene / UCAC4 582-036213 event on 2024 Dec 24, 00:52 UT Visible from Summary ------- On 2024 Dec 24 UT, the 146.536 km diameter asteroid (14) Irene will occult a 12.0 mag star in the constellation Gemini for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 0.14 mag to 9.85 mag (the magnitude of the asteroid) for at most 13.360 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 Dec 24, 00:43 - 2024 Dec 24, 01:01 * geocentric midpoint of event [JD]: 2460668.53632054 * magnitude of target star: 11.99 * magnitude drop [mag]: 0.14 * estimated maximum duration [s]: 13.360 * Moon: 39 % sunlit, 90° distance * Sun: 167° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 157 * 1 sigma uncertainty interval [path widths]: +/- 0.08 * 1 sigma uncertainty interval [seconds]: +/- 2.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.024, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.024", 0.003", 89°) * approx speed of asteroid's shadow [km/s]: 10.9719 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 582-036213 by 14 Irene on 2024 Dec 24 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 - 92 0 0 2 55 31 1 1 19.0 0 64 -13 3 43 17 .. .. .. 3 51 3 .. .. .. .... - 91 0 0 3 24 44 1 1 18.8 1 64 -15 4 12 16 2 36 54 4 20 1 2 29 3 0.14 - 90 0 0 3 53 16 1 1 18.4 2 64 -16 4 40 36 3 5 38 4 48 18 2 57 50 0.26 - 89 0 0 4 21 7 1 1 17.7 4 64 -17 5 8 14 3 33 42 5 15 54 3 25 55 0.31 - 88 0 0 4 48 16 1 1 16.9 5 64 -18 5 35 12 4 1 4 5 42 50 3 53 19 0.33 - 87 0 0 5 14 45 1 1 15.8 6 64 -19 6 1 28 4 27 45 6 9 5 4 20 2 0.35 - 86 0 0 5 40 33 1 1 14.5 7 64 -20 6 27 4 4 53 44 6 34 39 4 46 3 0.36 - 85 0 0 6 5 39 1 1 13.0 8 64 -21 6 51 59 5 19 2 6 59 32 5 11 24 0.37 - 84 0 0 6 30 5 1 1 11.3 9 64 -22 7 16 14 5 43 39 7 23 45 5 36 2 0.37 - 83 0 0 6 53 49 1 1 9.4 10 65 -23 7 39 48 6 7 35 7 47 17 6 0 0 0.38 - 82 0 0 7 16 53 1 1 7.3 11 65 -24 8 2 41 6 30 50 8 10 8 6 23 17 0.38 - 81 0 0 7 39 16 1 1 5.0 12 65 -25 8 24 54 6 53 23 8 32 19 6 45 52 0.38 - 80 0 0 8 0 59 1 1 2.5 13 65 -26 8 46 26 7 15 16 8 53 50 7 7 46 0.38 - 79 0 0 8 22 1 1 0 59.8 14 65 -27 9 7 18 7 36 28 9 14 41 7 29 0 0.39 - 78 0 0 8 42 23 1 0 56.9 15 65 -28 9 27 30 7 57 0 9 34 51 7 49 33 0.39 - 77 0 0 9 2 4 1 0 53.9 16 65 -29 9 47 2 8 16 51 9 54 22 8 9 26 0.39 - 76 0 0 9 21 6 1 0 50.6 17 65 -31 10 5 55 8 36 1 10 13 13 8 28 38 0.39 - 75 0 0 9 39 27 1 0 47.2 18 65 -32 10 24 8 8 54 31 10 31 24 8 47 10 0.39 - 74 0 0 9 57 9 1 0 43.7 19 66 -33 10 41 41 9 12 22 10 48 56 9 5 1 0.39 - 73 0 0 10 14 11 1 0 39.9 20 66 -34 10 58 35 9 29 33 11 5 49 9 22 13 0.39 - 72 0 0 10 30 34 1 0 36.0 21 66 -35 11 14 50 9 46 3 11 22 3 9 38 46 0.39 - 71 0 0 10 46 18 1 0 32.0 22 66 -36 11 30 27 10 1 55 11 37 38 9 54 38 0.39 - 70 0 0 11 1 23 1 0 27.8 23 66 -37 11 45 24 10 17 7 11 52 34 10 9 52 0.39 - 69 0 0 11 15 49 1 0 23.4 24 66 -38 11 59 43 10 31 40 12 6 52 10 24 26 0.39 - 68 0 0 11 29 36 1 0 18.9 25 66 -38 12 13 24 10 45 34 12 20 32 10 38 21 0.39 - 67 0 0 11 42 45 1 0 14.2 26 66 -39 12 26 26 10 58 49 12 33 33 10 51 37 0.39 - 66 0 0 11 55 15 1 0 9.4 27 66 -40 12 38 50 11 11 26 12 45 57 11 4 15 0.39 - 65 0 0 12 7 7 1 0 4.5 28 67 -41 12 50 37 11 23 24 12 57 42 11 16 14 0.39 - 64 0 0 12 18 22 0 59 59.4 29 67 -42 13 1 46 11 34 44 13 8 50 11 27 35 0.39 - 63 0 0 12 28 58 0 59 54.2 30 67 -43 13 12 17 11 45 26 13 19 21 11 38 18 0.39 - 62 0 0 12 38 57 0 59 48.8 31 67 -44 13 22 11 11 55 30 13 29 14 11 48 23 0.39 - 61 0 0 12 48 19 0 59 43.3 32 67 -45 13 31 28 12 4 56 13 38 30 11 57 50 0.39 - 60 0 0 12 57 3 0 59 37.7 33 67 -46 13 40 8 12 13 45 13 47 9 12 6 39 0.39 - 59 0 0 13 5 10 0 59 32.0 34 67 -47 13 48 11 12 21 56 13 55 11 12 14 51 0.39 - 58 0 0 13 12 40 0 59 26.1 35 67 -48 13 55 37 12 29 30 14 2 37 12 22 25 0.39 - 57 0 0 13 19 33 0 59 20.1 36 67 -49 14 2 27 12 36 26 14 9 26 12 29 22 0.39 - 56 0 0 13 25 49 0 59 14.0 36 67 -50 14 8 40 12 42 46 14 15 38 12 35 42 0.39 - 55 0 0 13 31 29 0 59 7.7 37 67 -51 14 14 16 12 48 28 14 21 15 12 41 25 0.39 - 54 0 0 13 36 32 0 59 1.4 38 67 -52 14 19 17 12 53 34 14 26 15 12 46 31 0.39 - 53 0 0 13 40 58 0 58 54.9 39 67 -53 14 23 41 12 58 3 14 30 39 12 51 1 0.39 - 52 0 0 13 44 49 0 58 48.3 40 67 -54 14 27 29 13 1 55 14 34 26 12 54 53 0.39 - 51 0 0 13 48 3 0 58 41.6 41 67 -54 14 30 42 13 5 11 14 37 38 12 58 9 0.39 - 50 0 0 13 50 40 0 58 34.8 42 67 -55 14 33 18 13 7 50 14 40 15 13 0 49 0.39 - 49 0 0 13 52 42 0 58 27.9 43 67 -56 14 35 19 13 9 53 14 42 15 13 2 52 0.39 - 48 0 0 13 54 8 0 58 20.8 44 67 -57 14 36 43 13 11 20 14 43 40 13 4 19 0.39 - 47 0 0 13 54 58 0 58 13.7 44 67 -58 14 37 33 13 12 10 14 44 29 13 5 10 0.39 - 46 0 0 13 55 12 0 58 6.4 45 67 -59 14 37 46 13 12 25 14 44 42 13 5 24 0.39 - 45 0 0 13 54 50 0 57 59.1 46 66 -60 14 37 24 13 12 3 14 44 21 13 5 2 0.39 - 44 0 0 13 53 52 0 57 51.6 47 66 -61 14 36 27 13 11 5 14 43 23 13 4 5 0.39 - 43 0 0 13 52 19 0 57 44.1 48 66 -61 14 34 54 13 9 31 14 41 50 13 2 31 0.39 - 42 0 0 13 50 10 0 57 36.4 49 66 -62 14 32 46 13 7 22 14 39 42 13 0 21 0.39 - 41 0 0 13 47 25 0 57 28.6 50 65 -63 14 30 2 13 4 36 14 36 59 12 57 35 0.39 - 40 0 0 13 44 5 0 57 20.8 50 65 -64 14 26 43 13 1 14 14 33 40 12 54 13 0.39 - 39 0 0 13 40 9 0 57 12.8 51 65 -65 14 22 48 12 57 16 14 29 45 12 50 15 0.39 - 38 0 0 13 35 37 0 57 4.7 52 64 -66 14 18 18 12 52 43 14 25 16 12 45 41 0.39 - 37 0 0 13 30 29 0 56 56.6 53 64 -66 14 13 13 12 47 33 14 20 11 12 40 31 0.39 - 36 0 0 13 24 46 0 56 48.3 54 64 -67 14 7 32 12 41 48 14 14 30 12 34 45 0.39 - 35 0 0 13 18 28 0 56 40.0 54 63 -68 14 1 16 12 35 26 14 8 15 12 28 23 0.39 - 34 0 0 13 11 33 0 56 31.6 55 63 -69 13 54 25 12 28 29 14 1 24 12 21 25 0.39 - 33 0 0 13 4 3 0 56 23.0 56 62 -69 13 46 58 12 20 55 13 53 57 12 13 51 0.39 - 32 0 0 12 55 57 0 56 14.4 57 61 -70 13 38 55 12 12 46 13 45 55 12 5 41 0.39 - 31 0 0 12 47 15 0 56 5.7 58 61 -71 13 30 17 12 4 0 13 37 18 11 56 55 0.39 - 30 0 0 12 37 58 0 55 56.9 58 60 -71 13 21 3 11 54 39 13 28 5 11 47 33 0.39 - 29 0 0 12 28 4 0 55 48.0 59 59 -72 13 11 14 11 44 41 13 18 16 11 37 34 0.39 - 28 0 0 12 17 35 0 55 39.0 60 58 -73 13 0 49 11 34 7 13 7 52 11 27 0 0.39 - 27 0 0 12 6 29 0 55 30.0 60 57 -73 12 49 49 11 22 57 12 56 52 11 15 49 0.39 - 26 0 0 11 54 48 0 55 20.8 61 56 -74 12 38 12 11 11 11 12 45 17 11 4 2 0.39 - 25 0 0 11 42 31 0 55 11.6 62 55 -74 12 26 0 10 58 48 12 33 5 10 51 38 0.39 - 24 0 0 11 29 37 0 55 2.3 62 54 -75 12 13 12 10 45 49 12 20 18 10 38 38 0.39 - 23 0 0 11 16 7 0 54 52.9 63 53 -75 11 59 48 10 32 13 12 6 55 10 25 1 0.39 - 22 0 0 11 2 1 0 54 43.5 64 52 -75 11 45 48 10 18 1 11 52 56 10 10 48 0.39 - 21 0 0 10 47 19 0 54 33.9 64 50 -76 11 31 12 10 3 13 11 38 21 9 55 59 0.39 - 20 0 0 10 32 1 0 54 24.3 65 49 -76 11 16 0 9 47 47 11 23 10 9 40 32 0.39 - 19 0 0 10 16 6 0 54 14.6 65 47 -76 11 0 12 9 31 46 11 7 23 9 24 30 0.39 - 18 0 0 9 59 34 0 54 4.9 66 45 -76 10 43 47 9 15 7 10 51 0 9 7 50 0.39 - 17 0 0 9 42 26 0 53 55.0 66 43 -76 10 26 47 8 57 52 10 34 0 8 50 33 0.39 - 16 0 0 9 24 42 0 53 45.1 67 42 -76 10 9 10 8 40 0 10 16 24 8 32 40 0.39 - 15 0 0 9 6 21 0 53 35.2 67 40 -76 9 50 57 8 21 31 9 58 12 8 14 10 0.39 - 14 0 0 8 47 23 0 53 25.1 67 37 -75 9 32 7 8 2 25 9 39 24 7 55 3 0.39 - 13 0 0 8 27 49 0 53 15.0 68 35 -75 9 12 41 7 42 43 9 19 59 7 35 19 0.39 - 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Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.8 Data for the target star ------------------------ * name: UCAC4 582-036213 * constellation : Gemini * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 07 08 24.7826 DE: +26 14 28.877 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 07 08 24.7826 DE: +26 14 28.877 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 12.0 * B mag [mag]: 12.6 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (14) Irene asteroid class: approx. diameter [km]: 147 approx. diameter ["]: 0.134 distance from Earth [AU]: 1.50930 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#101 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): 0.024", 0.003", 88.981° remarks: * orbital elements for (14)Irene : Mean anomaly = 294.4858049844 deg Arg. of pericenter = 98.1189127035 deg Long. of node = 86.0103212529 deg Inclination = 9.1294730769 deg Eccentricity = 0.1628915409 Semimajor axis = 2.5890593153 AU Perihelion dist = 2.1673234540 AU Mag: H = 6.55, G = 0.15 Epoch of elements : MJD 60668.03632021 TDT (2024 Dec 24.0363) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1012023Apr24,13.36,2024,12,24,0.871693,-0.152427,-0.333118,-5.631258,2.576816,-0.001376,-0.000204,0.000001,0.000000 1.3697,26.2016,166.82,-23.41,False UCAC4 582-036213,7.14021738,26.2413547,12.57,11.99,11.68,0.0,0,,7.16634043,26.2015584,0.14,0.13,0,0,0 14,Irene,9.85,146.536,1.5093,0,0,-2.438,15.01,,9.8,0 0,294.2406,2024,12,23,98.1189,86.0103,9.1295,0.16289,2.58906,2.16732,6.55,5.0,0.15 1.082,0.0243,0.0033,89,0.0109,Known errors,1.02,0,-1,-1 20241224_036213,60140.75 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 18:03 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org