IOTA/IOTA-ES occultation update for (1261) Legia / UCAC4 388-146548 event on 2024 Dec 27, 17:07 UT Visible from Summary ------- On 2024 Dec 27 UT, the 32.1586580494621 km diameter asteroid (1261) Legia will occult a 10.2 mag star in the constellation Aquarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 7.75 mag to 17.96 mag (the magnitude of the asteroid) for at most 1.060 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: 99 * date and approx. time of event: 2024 Dec 27, 17:04 - 2024 Dec 27, 17:10 * geocentric midpoint of event [JD]: 2460672.21356900 * magnitude of target star: 10.21 * magnitude drop [mag]: 7.75 * estimated maximum duration [s]: 1.060 * Moon: 11 % sunlit, 95° distance * Sun: 57° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 33 * 1 sigma uncertainty interval [path widths]: +/- 0.31 * 1 sigma uncertainty interval [seconds]: +/- 1.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.010, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.011", 0.003", 66°) * approx speed of asteroid's shadow [km/s]: 30.4943 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 388-146548 by 1261 Legia 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 -109 0 0 -11 2 15 17 4 6.9 0 103 56 -11 11 27 -10 53 2 -11 17 9 -10 47 19 .... -108 0 0 -11 15 8 17 4 6.9 1 102 57 -11 24 19 -11 5 57 -11 30 2 -11 0 14 -0.07 -107 0 0 -11 27 35 17 4 7.1 2 102 58 -11 36 46 -11 18 24 -11 42 27 -11 12 42 -0.13 -106 0 0 -11 39 35 17 4 7.2 3 102 59 -11 48 45 -11 30 26 -11 54 26 -11 24 44 -0.15 -105 0 0 -11 51 9 17 4 7.5 4 102 60 -12 0 18 -11 42 0 -12 5 59 -11 36 19 -0.17 -104 0 0 -12 2 16 17 4 7.8 5 102 61 -12 11 24 -11 53 7 -12 17 4 -11 47 26 -0.18 -103 0 0 -12 12 55 17 4 8.2 6 101 62 -12 22 3 -12 3 48 -12 27 43 -11 58 7 -0.18 -102 0 0 -12 23 8 17 4 8.6 7 101 63 -12 32 15 -12 14 1 -12 37 54 -12 8 21 -0.19 -101 0 0 -12 32 54 17 4 9.1 8 101 64 -12 42 0 -12 23 47 -12 47 39 -12 18 8 -0.19 -100 0 0 -12 42 12 17 4 9.7 9 101 65 -12 51 18 -12 33 7 -12 56 56 -12 27 27 -0.19 - 99 0 0 -12 51 4 17 4 10.3 10 100 65 -13 0 8 -12 41 58 -13 5 47 -12 36 20 -0.19 - 98 0 0 -12 59 28 17 4 11.0 11 100 66 -13 8 32 -12 50 23 -13 14 10 -12 44 45 -0.19 - 97 0 0 -13 7 24 17 4 11.8 12 100 67 -13 16 28 -12 58 20 -13 22 6 -12 52 42 -0.20 - 96 0 0 -13 14 54 17 4 12.6 13 100 68 -13 23 57 -13 5 50 -13 29 34 -13 0 13 -0.20 - 95 0 0 -13 21 56 17 4 13.4 14 100 69 -13 30 59 -13 12 53 -13 36 36 -13 7 16 -0.20 - 94 0 0 -13 28 31 17 4 14.4 15 99 70 -13 37 33 -13 19 28 -13 43 10 -13 13 51 -0.20 - 93 0 0 -13 34 38 17 4 15.4 16 99 71 -13 43 40 -13 25 36 -13 49 16 -13 19 59 -0.20 - 92 0 0 -13 40 18 17 4 16.4 17 99 72 -13 49 19 -13 31 16 -13 54 55 -13 25 39 -0.20 - 91 0 0 -13 45 30 17 4 17.5 18 99 73 -13 54 31 -13 36 28 -14 0 7 -13 30 52 -0.20 - 90 0 0 -13 50 14 17 4 18.7 19 99 73 -13 59 15 -13 41 13 -14 4 51 -13 35 37 -0.20 - 89 0 0 -13 54 32 17 4 19.9 20 98 74 -14 3 32 -13 45 31 -14 9 7 -13 39 55 -0.20 - 88 0 0 -13 58 21 17 4 21.2 21 98 75 -14 7 21 -13 49 20 -14 12 56 -13 43 45 -0.20 - 87 0 0 -14 1 43 17 4 22.5 22 98 76 -14 10 43 -13 52 43 -14 16 18 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13.7 46 95 73 -13 4 13 -12 46 3 -13 9 51 -12 40 24 -0.21 - 61 0 0 -12 46 25 17 5 16.4 47 95 72 -12 55 31 -12 37 19 -13 1 10 -12 31 40 -0.21 - 60 0 0 -12 37 14 17 5 19.1 48 95 71 -12 46 21 -12 28 8 -12 52 0 -12 22 28 -0.21 - 59 0 0 -12 27 36 17 5 21.9 49 95 70 -12 36 43 -12 18 28 -12 42 22 -12 12 48 -0.21 - 58 0 0 -12 17 29 17 5 24.8 50 95 70 -12 26 37 -12 8 21 -12 32 17 -12 2 40 -0.21 - 57 0 0 -12 6 54 17 5 27.7 51 95 69 -12 16 3 -11 57 46 -12 21 43 -11 52 5 -0.21 - 56 0 0 -11 55 52 17 5 30.6 52 95 68 -12 5 1 -11 46 42 -12 10 42 -11 41 1 -0.21 - 55 0 0 -11 44 22 17 5 33.6 53 95 67 -11 53 32 -11 35 11 -11 59 13 -11 29 30 -0.21 - 54 0 0 -11 32 24 17 5 36.7 54 95 66 -11 41 35 -11 23 13 -11 47 17 -11 17 30 -0.21 - 53 0 0 -11 19 58 17 5 39.7 55 96 65 -11 29 10 -11 10 46 -11 34 53 -11 5 3 -0.21 - 52 0 0 -11 7 5 17 5 42.9 56 96 64 -11 16 18 -10 57 52 -11 22 1 -10 52 9 -0.21 - 51 0 0 -10 53 44 17 5 46.0 57 96 63 -11 2 58 -10 44 30 -11 8 41 -10 38 46 -0.21 - 50 0 0 -10 39 56 17 5 49.2 58 96 62 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9 31 24 17 9 3.3 61 221 7 9 21 20 9 41 28 9 15 6 9 47 43 -0.21 2 0 0 10 1 19 17 9 6.9 60 222 6 9 51 16 10 11 24 9 45 1 10 17 39 -0.21 3 0 0 10 31 17 17 9 10.5 59 223 5 10 21 13 10 41 21 10 14 58 10 47 37 -0.21 4 0 0 11 1 15 17 9 14.0 58 224 4 10 51 10 11 11 19 10 44 55 11 17 35 -0.21 5 0 0 11 31 12 17 9 17.5 57 225 3 11 21 8 11 41 17 11 14 53 11 47 33 -0.21 6 0 0 12 1 9 17 9 21.0 56 225 2 11 51 4 12 11 14 11 44 49 12 17 30 -0.21 7 0 0 12 31 3 17 9 24.4 55 226 0 12 20 59 12 41 8 12 14 44 12 47 24 -0.21 8 0 0 13 0 55 17 9 27.7 54 227 -1 12 50 51 13 11 0 12 44 36 13 17 16 -0.21 9 0 0 13 30 44 17 9 31.0 53 227 -2 13 20 39 13 40 49 13 14 24 13 47 4 -0.21 10 0 0 14 0 27 17 9 34.2 52 228 -3 13 50 23 14 10 32 13 44 8 14 16 48 -0.21 11 0 0 14 30 6 17 9 37.4 50 229 -4 14 20 2 14 40 11 14 13 47 14 46 26 -0.20 12 0 0 14 59 38 17 9 40.5 49 229 -5 14 49 34 15 9 43 14 43 20 15 15 58 -0.20 13 0 0 15 29 4 17 9 43.6 48 230 -6 15 19 0 15 39 8 15 12 45 15 45 24 -0.20 14 0 0 15 58 22 17 9 46.6 47 230 -7 15 48 18 16 8 26 15 42 4 16 14 41 -0.20 15 0 0 16 27 31 17 9 49.6 46 231 -8 16 17 28 16 37 35 16 11 14 16 43 50 -0.20 16 0 0 16 56 31 17 9 52.5 45 231 -9 16 46 28 17 6 34 16 40 14 17 12 49 -0.20 17 0 0 17 25 21 17 9 55.3 44 232 -10 17 15 19 17 35 24 17 9 5 17 41 38 -0.20 18 0 0 17 54 1 17 9 58.1 43 233 -11 17 43 59 18 4 3 17 37 45 18 10 17 -0.20 19 0 0 18 22 29 17 10 0.8 42 233 -13 18 12 27 18 32 30 18 6 14 18 38 44 -0.20 20 0 0 18 50 45 17 10 3.4 41 234 -14 18 40 44 19 0 46 18 34 31 19 6 59 -0.20 21 0 0 19 18 48 17 10 6.0 40 234 -15 19 8 47 19 28 48 19 2 35 19 35 1 -0.20 22 0 0 19 46 37 17 10 8.5 39 234 -16 19 36 38 19 56 37 19 30 26 20 2 50 -0.20 23 0 0 20 14 13 17 10 10.9 38 235 -17 20 4 14 20 24 12 19 58 2 20 30 24 -0.20 24 0 0 20 41 34 17 10 13.3 37 235 -18 20 31 36 20 51 32 20 25 24 20 57 44 -0.20 25 0 0 21 8 39 17 10 15.6 36 236 -19 20 58 42 21 18 37 20 52 31 21 24 48 -0.20 26 0 0 21 35 29 17 10 17.8 35 236 -20 21 25 32 21 45 26 21 19 22 21 51 37 -0.20 27 0 0 22 2 2 17 10 20.0 34 237 -21 21 52 7 22 11 58 21 45 57 22 18 9 -0.20 28 0 0 22 28 19 17 10 22.1 33 237 -22 22 18 24 22 38 14 22 12 15 22 44 24 -0.20 29 0 0 22 54 18 17 10 24.1 32 238 -23 22 44 24 23 4 12 22 38 15 23 10 21 -0.20 30 0 0 23 19 59 17 10 26.1 31 238 -24 23 10 6 23 29 52 23 3 58 23 36 1 -0.20 31 0 0 23 45 22 17 10 28.0 30 239 -25 23 35 30 23 55 14 23 29 22 24 1 22 -0.20 32 0 0 24 10 26 17 10 29.8 29 239 -26 24 0 35 24 20 17 23 54 28 24 26 25 -0.20 33 0 0 24 35 11 17 10 31.6 28 240 -27 24 25 21 24 45 1 24 19 14 24 51 8 -0.20 34 0 0 24 59 36 17 10 33.3 27 240 -28 24 49 47 25 9 26 24 43 41 25 15 32 -0.20 35 0 0 25 23 41 17 10 34.9 26 241 -29 25 13 53 25 33 30 25 7 48 25 39 35 -0.20 36 0 0 25 47 26 17 10 36.5 25 241 -30 25 37 40 25 57 14 25 31 35 26 3 19 -0.20 37 0 0 26 10 51 17 10 38.0 24 242 -31 26 1 5 26 20 37 25 55 1 26 26 41 -0.20 38 0 0 26 33 54 17 10 39.5 23 242 -32 26 24 10 26 43 40 26 18 7 26 49 43 -0.20 39 0 0 26 56 37 17 10 40.8 22 243 -33 26 46 53 27 6 21 26 40 51 27 12 24 -0.20 40 0 0 27 18 58 17 10 42.1 21 243 -34 27 9 15 27 28 41 27 3 13 27 34 43 -0.20 41 0 0 27 40 57 17 10 43.4 20 244 -35 27 31 15 27 50 39 27 25 14 27 56 40 -0.20 42 0 0 28 2 34 17 10 44.6 19 244 -36 27 52 54 28 12 15 27 46 54 28 18 15 -0.20 43 0 0 28 23 49 17 10 45.7 18 245 -37 28 14 10 28 33 29 28 8 10 28 39 29 -0.20 44 0 0 28 44 42 17 10 46.7 17 245 -37 28 35 4 28 54 20 28 29 5 29 0 20 -0.20 45 0 0 29 5 12 17 10 47.7 16 246 -38 28 55 35 29 14 49 28 49 37 29 20 48 -0.20 46 0 0 29 25 20 17 10 48.7 15 246 -39 29 15 44 29 34 56 29 9 47 29 40 54 -0.20 47 0 0 29 45 4 17 10 49.6 14 247 -40 29 35 30 29 54 39 29 29 33 30 0 36 -0.20 48 0 0 30 4 26 17 10 50.4 13 247 -41 29 54 53 30 14 0 29 48 57 30 19 56 -0.20 49 0 0 30 23 25 17 10 51.1 12 248 -42 30 13 53 30 32 57 30 7 58 30 38 53 -0.20 50 0 0 30 42 0 17 10 51.8 11 248 -43 30 32 29 30 51 32 30 26 35 30 57 27 -0.20 51 0 0 31 0 13 17 10 52.5 11 249 -44 30 50 43 31 9 43 30 44 49 31 15 37 -0.20 52 0 0 31 18 2 17 10 53.1 10 249 -45 31 8 33 31 27 31 31 2 40 31 33 24 -0.20 53 0 0 31 35 27 17 10 53.6 9 250 -45 31 26 0 31 44 55 31 20 7 31 50 48 -0.20 54 0 0 31 52 30 17 10 54.1 8 250 -46 31 43 3 32 1 56 31 37 11 32 7 49 -0.20 55 0 0 32 9 8 17 10 54.5 7 251 -47 31 59 43 32 18 34 31 53 52 32 24 25 -0.20 56 0 0 32 25 24 17 10 54.9 6 251 -48 32 15 59 32 34 48 32 10 9 32 40 39 -0.20 57 0 0 32 41 15 17 10 55.2 5 252 -49 32 31 52 32 50 39 32 26 3 32 56 29 -0.20 58 0 0 32 56 43 17 10 55.5 4 252 -50 32 47 21 33 6 6 32 41 33 33 11 55 -0.20 59 0 0 33 11 48 17 10 55.7 3 253 -51 33 2 27 33 21 9 32 56 39 33 26 58 -0.20 60 0 0 33 26 29 17 10 55.8 2 253 -51 33 17 9 33 35 50 33 11 22 33 41 38 -0.20 61 0 0 33 40 47 17 10 56.0 2 254 -52 33 31 28 33 50 6 33 25 41 33 55 53 -0.20 62 0 0 33 54 41 17 10 56.0 1 255 -53 33 45 23 34 3 59 33 39 37 34 9 46 -0.20 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.8 Data for the target star ------------------------ * name: UCAC4 388-146548 * constellation : Aquarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 22 21 50.8617 DE: -12 30 12.068 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 22 21 50.8611 DE: -12 30 12.072 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 10.2 * B mag [mag]: 10.6 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1261) Legia asteroid class: approx. diameter [km]: 32 approx. diameter ["]: 0.011 distance from Earth [AU]: 4.14110 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#64 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): 0.011", 0.003", 66.39° remarks: * orbital elements for (1261)Legia : Mean anomaly = 172.1420889657 deg Arg. of pericenter = 103.8660340085 deg Long. of node = 67.2727238316 deg Inclination = 2.4267874893 deg Eccentricity = 0.1786258855 Semimajor axis = 3.1363897138 AU Perihelion dist = 2.5761493239 AU Mag: H = 11.29, G = 0.15 Epoch of elements : MJD 60671.71356875 TDT (2024 Dec 27.7136) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#642023Apr24,1.06,2024,12,27,17.125656,-0.076642,0.190424,15.843522,6.725324,0.004829,0.001749,-0.000001,0.000000 -17.7672,-12.3790,-76.54,-23.28,False UCAC4 388-146548,22.36412829,-12.5033522,10.59,10.21,10.00,0.1,4,,22.38614146,-12.3789813,7.75,7.51,0,0,0 1261,Legia,17.96,32.459,4.1411,0,0,2.297,14.29,,1.8,0 0,172.0155,2024,12,27,103.8660,67.2727,2.4268,0.17863,3.13639,2.57615,11.28,5.0,0.15 1.310,0.0107,0.0033,66,0.0033,Known errors,1.03,0,-1,-1 20241227_146548,60140.76 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 18:10 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org