IOTA/IOTA-ES occultation update for (1014) Semphyra / UCAC4 334-115100 event on 2024 Feb 08, 03:10 UT Visible from Summary ------- On 2024 Feb 08 UT, the 17.5971090317053 km diameter asteroid (1014) Semphyra will occult a 11.5 mag star in the constellation Ophiuchus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.45 mag to 17.97 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: 99 * date and approx. time of event: 2024 Feb 08, 03:07 - 2024 Feb 08, 03:13 * geocentric midpoint of event [JD]: 2460348.63251554 * magnitude of target star: 11.52 * magnitude drop [mag]: 6.45 * estimated maximum duration [s]: 0.530 * Moon: 5 % sunlit, 28° distance * Sun: 52° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 19 * 1 sigma uncertainty interval [path widths]: +/- 0.17 * 1 sigma uncertainty interval [seconds]: +/- 0.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.007, +/- 0.001) * 1 sigma uncertainty ellipse (major, minor, PA): (0.007", 0.001", 89°) * approx speed of asteroid's shadow [km/s]: 33.4084 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 334-115100 by 1014 Semphyra on 2024 Feb 8 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 - 0 0 0 18 33 8 3 7 49.7 0 115 -48 18 27 29 18 38 48 18 25 30 18 40 46 .... 1 0 0 18 6 44 3 7 49.7 1 115 -47 18 1 5 18 12 23 17 59 6 18 14 22 -0.08 2 0 0 17 40 20 3 7 49.8 2 115 -46 17 34 41 17 45 59 17 32 42 17 47 58 -0.20 3 0 0 17 13 57 3 7 50.0 3 116 -45 17 8 19 17 19 37 17 6 20 17 21 35 -0.25 4 0 0 16 47 37 3 7 50.3 4 116 -44 16 41 58 16 53 16 16 40 0 16 55 14 -0.28 5 0 0 16 21 19 3 7 50.6 5 116 -43 16 15 40 16 26 57 16 13 42 16 28 56 -0.29 6 0 0 15 55 4 3 7 51.0 6 117 -42 15 49 26 16 0 42 15 47 28 16 2 41 -0.30 7 0 0 15 28 53 3 7 51.4 8 117 -41 15 23 15 15 34 31 15 21 17 15 36 30 -0.31 8 0 0 15 2 47 3 7 51.9 9 117 -40 14 57 10 15 8 25 14 55 12 15 10 23 -0.32 9 0 0 14 36 47 3 7 52.5 10 117 -39 14 31 9 14 42 24 14 29 11 14 44 22 -0.32 10 0 0 14 10 52 3 7 53.2 11 118 -38 14 5 15 14 16 29 14 3 17 14 18 27 -0.32 11 0 0 13 45 4 3 7 53.9 12 118 -37 13 39 28 13 50 41 13 37 30 13 52 39 -0.33 12 0 0 13 19 24 3 7 54.7 13 118 -36 13 13 48 13 25 0 13 11 50 13 26 58 -0.33 13 0 0 12 53 52 3 7 55.6 14 118 -35 12 48 16 12 59 28 12 46 18 13 1 25 -0.33 14 0 0 12 28 28 3 7 56.5 15 119 -34 12 22 53 12 34 4 12 20 55 12 36 2 -0.33 15 0 0 12 3 14 3 7 57.5 16 119 -33 11 57 39 12 8 50 11 55 42 12 10 47 -0.33 16 0 0 11 38 10 3 7 58.6 17 119 -32 11 32 36 11 43 45 11 30 39 11 45 43 -0.34 17 0 0 11 13 17 3 7 59.8 18 119 -31 11 7 43 11 18 52 11 5 46 11 20 49 -0.34 18 0 0 10 48 36 3 8 1.0 19 120 -30 10 43 2 10 54 10 10 41 5 10 56 7 -0.34 19 0 0 10 24 6 3 8 2.3 20 120 -29 10 18 33 10 29 40 10 16 36 10 31 36 -0.34 20 0 0 9 59 49 3 8 3.6 21 120 -28 9 54 16 10 5 22 9 52 20 10 7 19 -0.34 21 0 0 9 35 45 3 8 5.0 22 120 -27 9 30 13 9 41 18 9 28 16 9 43 14 -0.34 22 0 0 9 11 55 3 8 6.5 23 121 -26 9 6 23 9 17 27 9 4 27 9 19 23 -0.34 23 0 0 8 48 19 3 8 8.0 25 121 -25 8 42 48 8 53 51 8 40 52 8 55 47 -0.34 24 0 0 8 24 58 3 8 9.6 26 121 -24 8 19 28 8 30 29 8 17 32 8 32 25 -0.34 25 0 0 8 1 53 3 8 11.3 27 121 -23 7 56 23 8 7 24 7 54 27 8 9 19 -0.34 26 0 0 7 39 4 3 8 13.0 28 121 -22 7 33 34 7 44 34 7 31 39 7 46 29 -0.34 27 0 0 7 16 31 3 8 14.8 29 122 -21 7 11 2 7 22 1 7 9 7 7 23 56 -0.35 28 0 0 6 54 15 3 8 16.6 30 122 -20 6 48 47 6 59 44 6 46 52 7 1 40 -0.35 29 0 0 6 32 17 3 8 18.5 31 122 -18 6 26 49 6 37 46 6 24 54 6 39 41 -0.35 30 0 0 6 10 37 3 8 20.5 32 122 -17 6 5 10 6 16 5 6 3 15 6 18 0 -0.35 31 0 0 5 49 16 3 8 22.5 33 123 -16 5 43 49 5 54 43 5 41 54 5 56 38 -0.35 32 0 0 5 28 13 3 8 24.6 34 123 -15 5 22 46 5 33 40 5 20 52 5 35 34 -0.35 33 0 0 5 7 30 3 8 26.7 35 123 -14 5 2 4 5 12 56 5 0 10 5 14 50 -0.35 34 0 0 4 47 6 3 8 28.9 36 124 -13 4 41 41 4 52 32 4 39 47 4 54 26 -0.35 35 0 0 4 27 3 3 8 31.1 37 124 -12 4 21 38 4 32 28 4 19 44 4 34 22 -0.35 36 0 0 4 7 20 3 8 33.4 38 124 -11 4 1 56 4 12 45 4 0 3 4 14 38 -0.35 37 0 0 3 47 59 3 8 35.7 39 124 -10 3 42 35 3 53 23 3 40 42 3 55 16 -0.35 38 0 0 3 28 58 3 8 38.1 40 125 -9 3 23 35 3 34 22 3 21 42 3 36 15 -0.35 39 0 0 3 10 20 3 8 40.5 41 125 -8 3 4 57 3 15 43 3 3 4 3 17 36 -0.35 40 0 0 2 52 3 3 8 43.0 42 125 -7 2 46 41 2 57 26 2 44 48 2 59 18 -0.35 41 0 0 2 34 9 3 8 45.5 43 126 -6 2 28 47 2 39 31 2 26 55 2 41 23 -0.35 42 0 0 2 16 37 3 8 48.1 44 126 -5 2 11 16 2 21 59 2 9 24 2 23 51 -0.35 43 0 0 1 59 29 3 8 50.7 45 127 -4 1 54 8 2 4 50 1 52 16 2 6 42 -0.35 44 0 0 1 42 44 3 8 53.3 46 127 -3 1 37 24 1 48 4 1 35 32 1 49 56 -0.35 45 0 0 1 26 22 3 8 56.0 47 127 -2 1 21 2 1 31 41 1 19 11 1 33 33 -0.35 46 0 0 1 10 24 3 8 58.7 48 128 -1 1 5 5 1 15 43 1 3 13 1 17 35 -0.35 47 0 0 0 54 50 3 9 1.5 49 128 0 0 49 31 1 0 8 0 47 40 1 2 0 -0.35 48 0 0 0 39 40 3 9 4.3 50 129 2 0 34 22 0 44 58 0 32 31 0 46 50 -0.35 49 0 0 0 24 55 3 9 7.1 51 130 3 0 19 37 0 30 12 0 17 46 0 32 4 -0.35 50 0 0 0 10 34 3 9 10.0 52 130 4 0 5 17 0 15 51 0 3 26 0 17 42 -0.35 51 0 0 - 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2 15 34 -0.36 101 0 0 - 2 14 8 3 11 55.7 61 222 54 - 2 19 19 - 2 8 56 - 2 21 9 - 2 7 6 -0.36 102 0 0 - 2 5 14 3 11 58.8 60 223 54 - 2 10 26 - 2 0 1 - 2 12 15 - 1 58 12 -0.36 103 0 0 - 1 55 53 3 12 2.0 59 224 55 - 2 1 6 - 1 50 40 - 2 2 55 - 1 48 51 -0.36 104 0 0 - 1 46 6 3 12 5.1 59 225 56 - 1 51 19 - 1 40 53 - 1 53 9 - 1 39 4 -0.36 105 0 0 - 1 35 53 3 12 8.2 58 226 57 - 1 41 6 - 1 30 40 - 1 42 56 - 1 28 50 -0.36 106 0 0 - 1 25 13 3 12 11.2 57 226 58 - 1 30 27 - 1 20 0 - 1 32 17 - 1 18 10 -0.36 107 0 0 - 1 14 8 3 12 14.3 56 227 59 - 1 19 22 - 1 8 54 - 1 21 12 - 1 7 4 -0.36 108 0 0 - 1 2 36 3 12 17.3 55 228 59 - 1 7 51 - 0 57 22 - 1 9 41 - 0 55 32 -0.36 109 0 0 - 0 50 39 3 12 20.2 54 229 60 - 0 55 54 - 0 45 24 - 0 57 44 - 0 43 34 -0.36 110 0 0 - 0 38 16 3 12 23.2 53 229 61 - 0 43 31 - 0 33 0 - 0 45 22 - 0 31 10 -0.36 111 0 0 - 0 25 27 3 12 26.1 52 230 62 - 0 30 43 - 0 20 11 - 0 32 34 - 0 18 21 -0.36 112 0 0 - 0 12 13 3 12 29.0 51 231 62 - 0 17 30 - 0 6 57 - 0 19 20 - 0 5 6 -0.36 113 0 0 0 1 26 3 12 31.9 51 231 63 - 0 3 51 0 6 42 - 0 5 42 0 8 33 -0.36 114 0 0 0 15 30 3 12 34.7 50 232 64 0 10 13 0 20 47 0 8 22 0 22 38 -0.36 115 0 0 0 29 59 3 12 37.5 49 232 64 0 24 41 0 35 16 0 22 50 0 37 8 -0.36 116 0 0 0 44 52 3 12 40.2 48 233 65 0 39 34 0 50 10 0 37 43 0 52 2 -0.36 117 0 0 1 0 10 3 12 42.9 47 233 66 0 54 51 1 5 29 0 53 0 1 7 20 -0.36 118 0 0 1 15 52 3 12 45.6 46 234 66 1 10 33 1 21 11 1 8 41 1 23 3 -0.36 119 0 0 1 31 58 3 12 48.2 45 234 67 1 26 39 1 37 18 1 24 47 1 39 10 -0.36 120 0 0 1 48 28 3 12 50.8 44 234 67 1 43 8 1 53 48 1 41 16 1 55 40 -0.36 121 0 0 2 5 21 3 12 53.4 43 235 68 2 0 0 2 10 42 1 58 8 2 12 34 -0.36 122 0 0 2 22 37 3 12 55.9 42 235 68 2 17 16 2 27 58 2 15 23 2 29 51 -0.36 123 0 0 2 40 16 3 12 58.3 41 236 68 2 34 54 2 45 38 2 33 2 2 47 31 -0.36 124 0 0 2 58 18 3 13 0.7 40 236 69 2 52 55 3 3 40 2 51 3 3 5 33 -0.36 125 0 0 3 16 41 3 13 3.1 39 236 69 3 11 18 3 22 4 3 9 26 3 23 57 -0.36 126 0 0 3 35 27 3 13 5.4 38 236 69 3 30 4 3 40 51 3 28 11 3 42 44 -0.36 127 0 0 3 54 34 3 13 7.7 37 237 69 3 49 10 3 59 58 3 47 17 4 1 52 -0.36 128 0 0 4 14 3 3 13 9.9 36 237 69 4 8 38 4 19 28 4 6 45 4 21 21 -0.36 129 0 0 4 33 52 3 13 12.1 35 237 69 4 28 27 4 39 17 4 26 33 4 41 11 -0.36 130 0 0 4 54 2 3 13 14.2 34 238 69 4 48 36 4 59 28 4 46 42 5 1 22 -0.36 131 0 0 5 14 32 3 13 16.2 33 238 69 5 9 5 5 19 58 5 7 11 5 21 52 -0.36 132 0 0 5 35 21 3 13 18.2 32 238 69 5 29 54 5 40 48 5 28 0 5 42 42 -0.36 133 0 0 5 56 30 3 13 20.2 31 238 69 5 51 2 6 1 57 5 49 8 6 3 52 -0.36 134 0 0 6 17 57 3 13 22.1 30 239 69 6 12 29 6 23 25 6 10 35 6 25 20 -0.36 135 0 0 6 39 43 3 13 23.9 29 239 68 6 34 14 6 45 11 6 32 20 6 47 6 -0.36 136 0 0 7 1 46 3 13 25.7 28 239 68 6 56 17 7 7 15 6 54 22 7 9 11 -0.36 137 0 0 7 24 7 3 13 27.4 26 239 67 7 18 38 7 29 37 7 16 43 7 31 32 -0.36 138 0 0 7 46 45 3 13 29.0 25 239 67 7 41 15 7 52 15 7 39 20 7 54 11 -0.36 139 0 0 8 9 39 3 13 30.6 24 240 66 8 4 9 8 15 10 8 2 13 8 17 6 -0.36 140 0 0 8 32 49 3 13 32.2 23 240 66 8 27 18 8 38 20 8 25 22 8 40 16 -0.36 141 0 0 8 56 14 3 13 33.6 22 240 65 8 50 43 9 1 46 8 48 47 9 3 42 -0.36 142 0 0 9 19 54 3 13 35.0 21 240 65 9 14 22 9 25 27 9 12 26 9 27 23 -0.36 143 0 0 9 43 49 3 13 36.4 20 241 64 9 38 16 9 49 21 9 36 20 9 51 18 -0.36 144 0 0 10 7 56 3 13 37.6 19 241 63 10 2 23 10 13 29 10 0 27 10 15 26 -0.36 145 0 0 10 32 17 3 13 38.8 18 241 63 10 26 44 10 37 51 10 24 47 10 39 47 -0.36 146 0 0 10 56 50 3 13 40.0 17 241 62 10 51 16 11 2 24 10 49 19 11 4 21 -0.36 147 0 0 11 21 35 3 13 41.0 16 241 61 11 16 1 11 27 10 11 14 4 11 29 7 -0.36 148 0 0 11 46 31 3 13 42.0 15 242 60 11 40 56 11 52 6 11 38 59 11 54 3 -0.36 149 0 0 12 11 38 3 13 43.0 14 242 59 12 6 2 12 17 13 12 4 5 12 19 10 -0.36 150 0 0 12 36 54 3 13 43.8 13 242 59 12 31 19 12 42 30 12 29 21 12 44 27 -0.36 151 0 0 13 2 20 3 13 44.6 12 242 58 12 56 44 13 7 56 12 54 46 13 9 54 -0.36 152 0 0 13 27 54 3 13 45.4 11 243 57 13 22 18 13 33 31 13 20 20 13 35 28 -0.36 153 0 0 13 53 36 3 13 46.0 10 243 56 13 47 59 13 59 13 13 46 2 14 1 11 -0.36 154 0 0 14 19 25 3 13 46.6 8 243 55 14 13 48 14 25 3 14 11 51 14 27 1 -0.36 155 0 0 14 45 21 3 13 47.1 7 243 54 14 39 44 14 50 59 14 37 46 14 52 57 -0.36 156 0 0 15 11 23 3 13 47.6 6 244 53 15 5 45 15 17 1 15 3 47 15 18 59 -0.36 157 0 0 15 37 30 3 13 47.9 5 244 52 15 31 52 15 43 8 15 29 54 15 45 7 -0.36 158 0 0 16 3 41 3 13 48.2 4 244 51 15 58 3 16 9 20 15 56 5 16 11 18 -0.36 159 0 0 16 29 56 3 13 48.5 3 244 51 16 24 18 16 35 35 16 22 20 16 37 34 -0.36 160 0 0 16 56 15 3 13 48.7 2 245 50 16 50 36 17 1 54 16 48 38 17 3 52 -0.37 161 0 0 17 22 35 3 13 48.8 1 245 49 17 16 56 17 28 14 17 14 58 17 30 13 -0.38 162 0 0 17 48 58 3 13 48.8 0 245 48 17 43 18 17 54 37 17 41 20 .. .. .. -1.12 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 13.2 Data for the target star ------------------------ * name: UCAC4 334-115100 * constellation : Ophiuchus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 43 16.2038 DE: -23 23 21.768 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 43 16.2038 DE: -23 23 21.768 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.5 * B mag [mag]: 12.6 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1014) Semphyra asteroid class: approx. diameter [km]: 18 approx. diameter ["]: 0.007 distance from Earth [AU]: 3.54200 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): 0.007", 0.001", 88.957° remarks: * orbital elements for (1014)Semphyra : Mean anomaly = 104.4164477439 deg Arg. of pericenter = 234.5913811112 deg Long. of node = 251.4625652672 deg Inclination = 2.2651847252 deg Eccentricity = 0.2039399342 Semimajor axis = 2.8000310560 AU Perihelion dist = 2.2289929068 AU Mag: H = 11.98, G = 0.15 Epoch of elements : MJD 60348.13251550 TDT (2024 Feb 08.1325) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#542023Apr24,0.53,2024,2,8,3.180373,0.003198,0.338724,18.856063,-0.143749,-0.004751,0.000130,-0.000001,0.000000 80.7367,-23.4010,135.82,-15.18,False UCAC4 334-115100,17.72116768,-23.3893799,12.63,11.52,10.92,0.1,0,,17.74527378,-23.4010031,6.45,6.60,0,0,1 1014,Semphyra,17.97,17.854,3.5420,0,0,3.402,-0.36,,1.4,0 0,104.3886,2024,2,8,234.5914,251.4626,2.2652,0.20394,2.80003,2.22899,11.98,5.0,0.15 1.175,0.0067,0.0012,89,0.0012,Known errors,0.74,0,-1,-1 20240208_115100,60138.16 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 13, 03:48 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org