IOTA/IOTA-ES occultation update for (1692) Subbotina / UCAC4 348-167314 event on 2024 Oct 29, 03:29 UT Visible from Summary ------- On 2024 Oct 29 UT, the 38.2563497748076 km diameter asteroid (1692) Subbotina will occult a 10.1 mag star in the constellation Sagittarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.31 mag to 16.43 mag (the magnitude of the asteroid) for at most 1.260 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 Oct 29, 03:26 - 2024 Oct 29, 03:32 * geocentric midpoint of event [JD]: 2460612.64547571 * magnitude of target star: 10.12 * magnitude drop [mag]: 6.31 * estimated maximum duration [s]: 1.260 * Moon: 9 % sunlit, 104° distance * Sun: 68° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 40 * 1 sigma uncertainty interval [path widths]: +/- 0.05 * 1 sigma uncertainty interval [seconds]: +/- 0.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.011, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.011", 0.001", 84°) * approx speed of asteroid's shadow [km/s]: 30.5894 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 348-167314 by 1692 Subbotina on 2024 Oct 29 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 8 54 7 3 26 6.5 0 111 63 8 42 39 9 5 35 8 41 25 9 6 50 .... 110 0 0 8 31 29 3 26 6.5 1 111 64 8 20 1 8 42 56 8 18 47 8 44 11 -0.03 111 0 0 8 8 56 3 26 6.7 2 111 65 7 57 30 8 20 23 7 56 15 8 21 38 -0.12 112 0 0 7 46 30 3 26 6.9 3 111 65 7 35 4 7 57 57 7 33 50 7 59 12 -0.16 113 0 0 7 24 12 3 26 7.1 4 111 66 7 12 46 7 35 38 7 11 31 7 36 52 -0.18 114 0 0 7 2 0 3 26 7.5 5 112 67 6 50 35 7 13 26 6 49 21 7 14 40 -0.19 115 0 0 6 39 57 3 26 7.9 7 112 68 6 28 33 6 51 22 6 27 18 6 52 37 -0.20 116 0 0 6 18 3 3 26 8.4 8 112 68 6 6 39 6 29 27 6 5 24 6 30 41 -0.20 117 0 0 5 56 17 3 26 8.9 9 112 69 5 44 54 6 7 41 5 43 39 6 8 55 -0.21 118 0 0 5 34 41 3 26 9.5 10 112 70 5 23 19 5 46 4 5 22 4 5 47 19 -0.21 119 0 0 5 13 15 3 26 10.3 11 112 70 5 1 53 5 24 38 5 0 39 5 25 52 -0.21 120 0 0 4 52 0 3 26 11.0 12 112 71 4 40 39 5 3 22 4 39 25 5 4 36 -0.22 121 0 0 4 30 56 3 26 11.9 13 112 72 4 19 36 4 42 18 4 18 22 4 43 32 -0.22 122 0 0 4 10 4 3 26 12.8 14 112 72 3 58 44 4 21 24 3 57 30 4 22 38 -0.22 123 0 0 3 49 24 3 26 13.8 15 112 73 3 38 4 4 0 43 3 36 51 4 1 57 -0.22 124 0 0 3 28 56 3 26 14.8 16 113 73 3 17 37 3 40 15 3 16 23 3 41 29 -0.22 125 0 0 3 8 41 3 26 16.0 17 113 73 2 57 23 3 19 59 2 56 9 3 21 13 -0.22 126 0 0 2 48 39 3 26 17.2 18 113 74 2 37 22 2 59 57 2 36 9 3 1 10 -0.22 127 0 0 2 28 51 3 26 18.4 19 113 74 2 17 35 2 40 8 2 16 22 2 41 22 -0.22 128 0 0 2 9 18 3 26 19.8 20 113 74 1 58 2 2 20 34 1 56 49 2 21 47 -0.23 129 0 0 1 49 59 3 26 21.2 21 113 74 1 38 44 2 1 14 1 37 31 2 2 27 -0.23 130 0 0 1 30 55 3 26 22.6 22 113 74 1 19 41 1 42 9 1 18 28 1 43 23 -0.23 131 0 0 1 12 6 3 26 24.2 23 113 74 1 0 53 1 23 20 0 59 40 1 24 33 -0.23 132 0 0 0 53 34 3 26 25.8 24 113 74 0 42 22 1 4 46 0 41 9 1 6 0 -0.23 133 0 0 0 35 17 3 26 27.4 25 113 73 0 24 6 0 46 29 0 22 53 0 47 42 -0.23 134 0 0 0 17 17 3 26 29.2 27 113 73 0 6 7 0 28 28 0 4 54 0 29 41 -0.23 135 0 0 - 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2 53 39 -0.24 -139 0 0 - 2 51 46 3 31 6.7 58 234 -7 - 3 2 47 - 2 40 44 - 3 3 58 - 2 39 32 -0.24 -138 0 0 - 2 37 20 3 31 10.0 57 234 -8 - 2 48 21 - 2 26 17 - 2 49 33 - 2 25 5 -0.24 -137 0 0 - 2 22 34 3 31 13.3 57 235 -9 - 2 33 36 - 2 11 31 - 2 34 48 - 2 10 18 -0.24 -136 0 0 - 2 7 28 3 31 16.5 56 235 -10 - 2 18 31 - 1 56 24 - 2 19 43 - 1 55 11 -0.24 -135 0 0 - 1 52 2 3 31 19.7 55 236 -11 - 2 3 6 - 1 40 57 - 2 4 18 - 1 39 45 -0.24 -134 0 0 - 1 36 17 3 31 22.9 54 236 -12 - 1 47 22 - 1 25 11 - 1 48 34 - 1 23 59 -0.24 -133 0 0 - 1 20 12 3 31 26.0 53 237 -13 - 1 31 18 - 1 9 6 - 1 32 31 - 1 7 53 -0.24 -132 0 0 - 1 3 49 3 31 29.1 52 237 -14 - 1 14 56 - 0 52 42 - 1 16 8 - 0 51 29 -0.24 -131 0 0 - 0 47 7 3 31 32.2 51 238 -15 - 0 58 15 - 0 35 59 - 0 59 28 - 0 34 47 -0.24 -130 0 0 - 0 30 7 3 31 35.2 50 238 -16 - 0 41 16 - 0 18 58 - 0 42 28 - 0 17 45 -0.24 -129 0 0 - 0 12 49 3 31 38.2 49 238 -17 - 0 23 59 - 0 1 39 - 0 25 11 - 0 0 26 -0.24 -128 0 0 0 4 47 3 31 41.1 48 239 -18 - 0 6 24 0 15 57 - 0 7 36 0 17 10 -0.24 -127 0 0 0 22 40 3 31 44.0 47 239 -20 0 11 29 0 33 51 0 10 16 0 35 4 -0.24 -126 0 0 0 40 50 3 31 46.8 46 239 -21 0 29 38 0 52 2 0 28 25 0 53 16 -0.24 -125 0 0 0 59 17 3 31 49.6 44 239 -22 0 48 4 1 10 30 0 46 51 1 11 43 -0.24 -124 0 0 1 18 0 3 31 52.4 43 240 -23 1 6 46 1 29 14 1 5 33 1 30 27 -0.24 -123 0 0 1 36 59 3 31 55.1 42 240 -24 1 25 44 1 48 14 1 24 31 1 49 27 -0.24 -122 0 0 1 56 13 3 31 57.7 41 240 -25 1 44 58 2 7 29 1 43 45 2 8 43 -0.24 -121 0 0 2 15 43 3 32 0.3 40 240 -26 2 4 27 2 27 0 2 3 14 2 28 13 -0.24 -120 0 0 2 35 27 3 32 2.9 39 241 -27 2 24 11 2 46 45 2 22 57 2 47 59 -0.24 -119 0 0 2 55 26 3 32 5.4 38 241 -28 2 44 8 3 6 44 2 42 55 3 7 58 -0.24 -118 0 0 3 15 39 3 32 7.8 37 241 -29 3 4 20 3 26 58 3 3 6 3 28 12 -0.24 -117 0 0 3 36 5 3 32 10.2 36 241 -30 3 24 45 3 47 24 3 23 32 3 48 38 -0.24 -116 0 0 3 56 44 3 32 12.5 35 241 -31 3 45 24 4 8 4 3 44 10 4 9 18 -0.24 -115 0 0 4 17 35 3 32 14.8 34 242 -32 4 6 14 4 28 56 4 5 0 4 30 10 -0.24 -114 0 0 4 38 39 3 32 17.0 33 242 -33 4 27 17 4 50 1 4 26 3 4 51 15 -0.24 -113 0 0 4 59 54 3 32 19.1 32 242 -34 4 48 32 5 11 16 4 47 17 5 12 31 -0.24 -112 0 0 5 21 20 3 32 21.2 31 242 -35 5 9 57 5 32 43 5 8 43 5 33 58 -0.24 -111 0 0 5 42 57 3 32 23.2 30 242 -36 5 31 33 5 54 21 5 30 19 5 55 35 -0.24 -110 0 0 6 4 44 3 32 25.2 29 243 -38 5 53 19 6 16 8 5 52 5 6 17 23 -0.24 -109 0 0 6 26 40 3 32 27.1 28 243 -39 6 15 15 6 38 5 6 14 1 6 39 20 -0.24 -108 0 0 6 48 46 3 32 28.9 27 243 -40 6 37 20 7 0 11 6 36 6 7 1 26 -0.24 -107 0 0 7 11 0 3 32 30.7 26 243 -41 6 59 34 7 22 26 6 58 19 7 23 41 -0.24 -106 0 0 7 33 22 3 32 32.3 25 243 -42 7 21 55 7 44 49 7 20 41 7 46 3 -0.24 -105 0 0 7 55 51 3 32 34.0 24 243 -43 7 44 24 8 7 19 7 43 10 8 8 33 -0.24 -104 0 0 8 18 28 3 32 35.5 22 244 -44 8 7 0 8 29 56 8 5 46 8 31 10 -0.24 -103 0 0 8 41 10 3 32 37.0 21 244 -45 8 29 43 8 52 39 8 28 28 8 53 54 -0.24 -102 0 0 9 3 59 3 32 38.4 20 244 -46 8 52 31 9 15 28 8 51 16 9 16 43 -0.24 -101 0 0 9 26 53 3 32 39.8 19 244 -47 9 15 24 9 38 22 9 14 9 9 39 37 -0.24 -100 0 0 9 49 51 3 32 41.1 18 244 -48 9 38 22 10 1 21 9 37 8 10 2 36 -0.24 - 99 0 0 10 12 54 3 32 42.3 17 245 -49 10 1 25 10 24 24 10 0 10 10 25 39 -0.24 - 98 0 0 10 36 0 3 32 43.4 16 245 -50 10 24 31 10 47 31 10 23 16 10 48 46 -0.24 - 97 0 0 10 59 10 3 32 44.5 15 245 -51 10 47 40 11 10 40 10 46 25 11 11 55 -0.24 - 96 0 0 11 22 21 3 32 45.5 14 245 -52 11 10 51 11 33 52 11 9 36 11 35 7 -0.24 - 95 0 0 11 45 35 3 32 46.4 13 245 -53 11 34 4 11 57 6 11 32 49 11 58 21 -0.23 - 94 0 0 12 8 50 3 32 47.2 12 246 -54 11 57 19 12 20 21 11 56 4 12 21 36 -0.23 - 93 0 0 12 32 5 3 32 48.0 11 246 -55 12 20 34 12 43 37 12 19 19 12 44 52 -0.23 - 92 0 0 12 55 21 3 32 48.7 10 246 -56 12 43 50 13 6 52 12 42 35 13 8 7 -0.23 - 91 0 0 13 18 36 3 32 49.3 9 246 -57 13 7 5 13 30 8 13 5 50 13 31 23 -0.23 - 90 0 0 13 41 50 3 32 49.9 8 247 -58 13 30 19 13 53 22 13 29 4 13 54 37 -0.23 - 89 0 0 14 5 3 3 32 50.4 7 247 -59 13 53 32 14 16 35 13 52 17 14 17 50 -0.23 - 88 0 0 14 28 14 3 32 50.8 6 247 -60 14 16 43 14 39 45 14 15 27 14 41 1 -0.23 - 87 0 0 14 51 22 3 32 51.1 5 247 -61 14 39 51 15 2 53 14 38 36 15 4 8 -0.23 - 86 0 0 15 14 26 3 32 51.4 4 248 -62 15 2 55 15 25 58 15 1 40 15 27 13 -0.23 - 85 0 0 15 37 28 3 32 51.6 3 248 -63 15 25 57 15 48 59 15 24 42 15 50 14 -0.23 - 84 0 0 16 0 24 3 32 51.8 1 248 -64 15 48 54 16 11 56 15 47 39 16 13 11 -0.23 - 83 0 0 16 23 16 3 32 51.8 0 248 -65 16 11 46 16 34 48 16 10 31 16 36 3 -0.21 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 348-167314 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 58 21.9205 DE: -20 35 45.602 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 58 21.9204 DE: -20 35 45.602 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 10.1 * B mag [mag]: 11.0 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1692) Subbotina asteroid class: approx. diameter [km]: 38 approx. diameter ["]: 0.020 distance from Earth [AU]: 2.60110 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#54 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", 0.001", 83.863° remarks: * orbital elements for (1692)Subbotina : Mean anomaly = 356.0184576370 deg Arg. of pericenter = 111.8364049130 deg Long. of node = 199.5577239249 deg Inclination = 2.4269108921 deg Eccentricity = 0.1364528498 Semimajor axis = 2.7875116461 AU Perihelion dist = 2.4071477382 AU Mag: H = 11.37, G = 0.15 Epoch of elements : MJD 60612.14547554 TDT (2024 Oct 29.1455) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#542023Apr24,1.26,2024,10,29,3.491417,-0.016908,0.233743,17.222603,1.216417,0.005250,0.000622,-0.000001,0.000000 -165.3754,-20.5634,123.56,-13.59,False UCAC4 348-167314,18.97275573,-20.5960006,11.01,10.12,9.64,0.1,0,,18.99710768,-20.5633771,6.31,6.34,0,0,0 1692,Subbotina,16.43,38.445,2.6011,0,0,4.146,4.12,,1.8,0 0,355.9876,2024,10,29,111.8364,199.5577,2.4269,0.13645,2.78751,2.40715,11.37,5.0,0.15 1.054,0.0113,0.0010,84,0.0011,Known errors,1.53,0,-1,-1 20241029_167314,60140.67 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:58 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org