IOTA/IOTA-ES occultation update for (9513) 1971 UN / UCAC4 360-073683 event on 2024 Mar 05, 07:07 UT Visible from Summary ------- On 2024 Mar 05 UT, the 10.361 km diameter asteroid (9513) 1971 UN will occult a 11.5 mag star in the constellation Libra for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.78 mag to 18.32 mag (the magnitude of the asteroid) for at most 1.400 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: 94 * date and approx. time of event: 2024 Mar 05, 06:54 - 2024 Mar 05, 07:20 * geocentric midpoint of event [JD]: 2460374.79675388 * magnitude of target star: 11.54 * magnitude drop [mag]: 6.78 * estimated maximum duration [s]: 1.400 * Moon: 33 % sunlit, 42° distance * Sun: 111° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 12 * 1 sigma uncertainty interval [path widths]: +/- 0.45 * 1 sigma uncertainty interval [seconds]: +/- 2.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.012, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.013", 0.002", 111°) * approx speed of asteroid's shadow [km/s]: 7.3857 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 360-073683 by 9513 1971 UN on 2024 Mar 5 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 -125 0 0 0 9 36 6 54 53.0 0 108 -65 0 6 9 0 13 4 0 3 4 0 16 8 .... -124 0 0 - 0 10 45 6 54 53.2 1 108 -66 - 0 14 13 - 0 7 16 - 0 17 19 - 0 4 11 0.44 -123 0 0 - 0 31 51 6 54 53.7 2 108 -67 - 0 35 20 - 0 28 22 - 0 38 26 - 0 25 16 0.52 -122 0 0 - 0 53 42 6 54 54.7 3 108 -68 - 0 57 12 - 0 50 12 - 1 0 19 - 0 47 5 0.55 -121 0 0 - 1 16 19 6 54 55.9 4 108 -69 - 1 19 50 - 1 12 48 - 1 22 58 - 1 9 40 0.56 -120 0 0 - 1 39 42 6 54 57.5 5 108 -69 - 1 43 14 - 1 36 10 - 1 46 23 - 1 33 1 0.57 -119 0 0 - 2 3 50 6 54 59.5 7 108 -70 - 2 7 23 - 2 0 17 - 2 10 33 - 1 57 8 0.58 -118 0 0 - 2 28 44 6 55 1.9 8 108 -71 - 2 32 19 - 2 25 10 - 2 35 29 - 2 22 0 0.58 -117 0 0 - 2 54 25 6 55 4.6 9 108 -72 - 2 58 0 - 2 50 50 - 3 1 12 - 2 47 39 0.59 -116 0 0 - 3 20 52 6 55 7.7 10 108 -72 - 3 24 28 - 3 17 16 - 3 27 41 - 3 14 4 0.59 -115 0 0 - 3 48 5 6 55 11.2 11 108 -73 - 3 51 43 - 3 44 28 - 3 54 56 - 3 41 15 0.59 -114 0 0 - 4 16 5 6 55 15.0 12 108 -74 - 4 19 44 - 4 12 27 - 4 22 58 - 4 9 12 0.60 -113 0 0 - 4 44 51 6 55 19.3 13 108 -74 - 4 48 31 - 4 41 12 - 4 51 47 - 4 37 56 0.60 -112 0 0 - 5 14 24 6 55 23.9 14 107 -74 - 5 18 5 - 5 10 43 - 5 21 22 - 5 7 27 0.60 -111 0 0 - 5 44 43 6 55 29.0 15 107 -75 - 5 48 25 - 5 41 1 - 5 51 43 - 5 37 44 0.60 -110 0 0 - 6 15 49 6 55 34.5 17 107 -75 - 6 19 32 - 6 12 5 - 6 22 51 - 6 8 47 0.60 -109 0 0 - 6 47 40 6 55 40.3 18 107 -75 - 6 51 25 - 6 43 56 - 6 54 45 - 6 40 36 0.60 -108 0 0 - 7 20 18 6 55 46.6 19 107 -75 - 7 24 4 - 7 16 32 - 7 27 26 - 7 13 12 0.60 -107 0 0 - 7 53 42 6 55 53.3 20 107 -75 - 7 57 29 - 7 49 55 - 8 0 52 - 7 46 33 0.60 -106 0 0 - 8 27 51 6 56 0.4 21 106 -75 - 8 31 40 - 8 24 3 - 8 35 4 - 8 20 40 0.61 -105 0 0 - 9 2 46 6 56 8.0 22 106 -75 - 9 6 36 - 8 58 56 - 9 10 1 - 8 55 31 0.61 -104 0 0 - 9 38 25 6 56 15.9 23 106 -74 - 9 42 17 - 9 34 34 - 9 45 43 - 9 31 8 0.61 -103 0 0 -10 14 49 6 56 24.3 24 105 -74 -10 18 42 -10 10 56 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39.6 28 289 20 -65 24 8 -65 17 40 -65 27 1 -65 14 48 0.59 20 59 59 -65 21 3 7 17 43.1 28 288 20 -65 24 17 -65 17 49 -65 27 10 -65 14 57 0.59 21 59 59 -65 20 54 7 17 46.6 28 287 21 -65 24 8 -65 17 41 -65 27 1 -65 14 48 0.59 22 59 59 -65 20 28 7 17 50.0 27 286 21 -65 23 42 -65 17 14 -65 26 34 -65 14 21 0.59 23 59 59 -65 19 43 7 17 53.4 27 285 21 -65 22 57 -65 16 29 -65 25 50 -65 13 36 0.59 24 59 59 -65 18 40 7 17 56.7 26 284 22 -65 21 55 -65 15 26 -65 24 47 -65 12 33 0.59 25 59 59 -65 17 20 7 18 0.0 26 283 22 -65 20 34 -65 14 5 -65 23 27 -65 11 12 0.59 26 59 59 -65 15 41 7 18 3.3 26 282 22 -65 18 55 -65 12 26 -65 21 49 -65 9 33 0.59 27 59 59 -65 13 44 7 18 6.5 25 281 23 -65 16 59 -65 10 29 -65 19 52 -65 7 36 0.59 28 59 59 -65 11 29 7 18 9.6 25 280 23 -65 14 44 -65 8 14 -65 17 38 -65 5 21 0.59 29 59 59 -65 8 56 7 18 12.8 24 279 23 -65 12 11 -65 5 40 -65 15 5 -65 2 47 0.59 30 59 59 -65 6 4 7 18 15.8 24 278 24 -65 9 20 -65 2 49 -65 12 14 -64 59 55 0.59 31 59 59 -65 2 54 7 18 18.9 24 277 24 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-63 56 37 -64 6 20 -63 53 38 0.60 44 59 59 -63 52 34 7 18 54.8 18 265 29 -63 55 56 -63 49 11 -63 58 57 -63 46 11 0.60 45 59 59 -63 44 47 7 18 57.3 17 264 29 -63 48 11 -63 41 24 -63 51 12 -63 38 24 0.60 46 59 59 -63 36 40 7 18 59.7 17 263 29 -63 40 4 -63 33 16 -63 43 5 -63 30 15 0.60 47 59 59 -63 28 10 7 19 2.1 17 262 30 -63 31 35 -63 24 45 -63 34 37 -63 21 44 0.61 48 59 59 -63 19 18 7 19 4.4 16 261 30 -63 22 44 -63 15 53 -63 25 47 -63 12 50 0.61 49 59 59 -63 10 4 7 19 6.7 16 260 30 -63 13 30 -63 6 38 -63 16 34 -63 3 35 0.61 50 59 59 -63 0 27 7 19 9.0 15 260 31 -63 3 54 -62 57 0 -63 6 59 -62 53 56 0.61 51 59 59 -62 50 27 7 19 11.2 15 259 31 -62 53 55 -62 46 59 -62 57 0 -62 43 54 0.61 52 59 59 -62 40 3 7 19 13.3 14 258 31 -62 43 32 -62 36 35 -62 46 38 -62 33 29 0.61 53 59 59 -62 29 16 7 19 15.5 14 257 32 -62 32 46 -62 25 46 -62 35 52 -62 22 40 0.61 54 59 59 -62 18 4 7 19 17.5 13 256 32 -62 21 35 -62 14 33 -62 24 42 -62 11 26 0.61 55 59 59 -62 6 28 7 19 19.5 13 255 32 -62 9 59 -62 2 56 -62 13 8 -61 59 48 0.62 56 59 59 -61 54 26 7 19 21.4 12 254 33 -61 57 59 -61 50 54 -62 1 8 -61 47 45 0.62 57 59 59 -61 41 59 7 19 23.3 12 253 33 -61 45 33 -61 38 26 -61 48 43 -61 35 16 0.62 58 59 59 -61 29 6 7 19 25.1 11 252 33 -61 32 41 -61 25 32 -61 35 52 -61 22 21 0.62 60 0 0 -61 15 47 7 19 26.9 11 251 34 -61 19 23 -61 12 12 -61 22 35 -61 9 0 0.62 61 0 0 -61 2 1 7 19 28.6 10 250 34 -61 5 38 -60 58 25 -61 8 51 -60 55 12 0.63 62 0 0 -60 47 48 7 19 30.2 9 250 34 -60 51 26 -60 44 10 -60 54 40 -60 40 57 0.63 63 0 0 -60 33 7 7 19 31.8 9 249 35 -60 36 46 -60 29 29 -60 40 1 -60 26 14 0.63 64 0 0 -60 17 58 7 19 33.2 8 248 35 -60 21 38 -60 14 18 -60 24 54 -60 11 3 0.64 65 0 0 -60 2 21 7 19 34.6 8 247 36 -60 6 2 -59 58 40 -60 9 19 -59 55 23 0.64 66 0 0 -59 46 14 7 19 36.0 7 246 36 -59 49 57 -59 42 32 -59 53 14 -59 39 15 0.64 67 0 0 -59 29 38 7 19 37.2 7 245 36 -59 33 22 -59 25 55 -59 36 41 -59 22 36 0.65 68 0 0 -59 12 32 7 19 38.3 6 244 37 -59 16 17 -59 8 48 -59 19 37 -59 5 28 0.66 69 0 0 -58 54 55 7 19 39.4 5 243 37 -58 58 41 -58 51 10 -59 2 2 -58 47 49 0.66 70 0 0 -58 36 48 7 19 40.4 5 243 37 -58 40 35 -58 33 1 -58 43 57 -58 29 39 0.67 71 0 0 -58 18 9 7 19 41.2 4 242 38 -58 21 57 -58 14 21 -58 25 20 -58 10 58 0.68 72 0 0 -57 58 58 7 19 42.0 4 241 38 -58 2 48 -57 55 9 -58 6 12 -57 51 45 0.70 73 0 0 -57 39 15 7 19 42.6 3 240 38 -57 43 6 -57 35 24 -57 46 31 -57 32 0 0.72 74 0 0 -57 18 59 7 19 43.2 2 239 39 -57 22 51 -57 15 7 -57 26 17 -57 11 41 0.76 75 0 0 -56 58 10 7 19 43.6 2 238 39 -57 2 3 -56 54 17 -57 5 31 -56 50 50 0.82 76 0 0 -56 36 47 7 19 43.9 1 238 39 -56 40 42 -56 32 53 -56 44 10 -56 29 25 0.95 77 0 0 -56 14 50 7 19 44.1 0 237 40 -56 18 46 -56 10 55 -56 22 16 -56 7 26 1.56 Uncertainty in time = +/- 3 secs Prediction of 2023 Jul 14.2 Data for the target star ------------------------ * name: UCAC4 360-073683 * constellation : Libra * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 15 26 46.4259 DE: -18 07 42.948 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 15 26 46.4259 DE: -18 07 42.949 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.5 * B mag [mag]: 12.1 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (9513) 1971 UN asteroid class: approx. diameter [km]: 10 approx. diameter ["]: 0.007 distance from Earth [AU]: 2.10280 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#47 date of fit: 2023 Apr 25 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): 0.013", 0.002", 110.6° remarks: * orbital elements for (9513)1971 UN : Mean anomaly = 265.6634792478 deg Arg. of pericenter = 296.0533920677 deg Long. of node = 37.0327102673 deg Inclination = 7.7150853988 deg Eccentricity = 0.2361714403 Semimajor axis = 2.4544155008 AU Perihelion dist = 1.8747526570 AU Mag: H = 13.59, G = 0.15 Epoch of elements : MJD 60374.29675391 TDT (2024 Mar 05.2968) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#472023Apr25,1.40,2024,3,5,7.122093,-0.253878,-0.433387,3.596715,-2.107516,-0.005273,0.001311,0.000000,0.000000 -38.3187,-18.2139,76.02,-5.83,False UCAC4 360-073683,15.44622939,-18.1285967,12.12,11.54,11.23,0.0,0,,15.46921274,-18.2139361,6.78,6.65,0,0,0 9513,1971 UN,18.32,10.361,2.1028,0,0,1.056,-8.82,,1.8,0 0,265.5874,2024,3,5,296.0534,37.0327,7.7151,0.23617,2.45442,1.87475,13.59,5.0,0.15 1.445,0.0130,0.0021,111,0.0030,Known errors,1.14,0,-1,-1 20240305_073683,60139.21 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 14, 05:08 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org