IOTA/IOTA-ES occultation update for (2803) Vilho / TYC 1830-01947-1 event on 2024 Sep 17, 23:55 UT Visible from Summary ------- On 2024 Sep 17 UT, the 21.464 km diameter asteroid (2803) Vilho will occult a 11.1 mag star in the constellation Taurus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.83 mag to 16.90 mag (the magnitude of the asteroid) for at most 1.820 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 Sep 17, 23:46 - 2024 Sep 18, 00:04 * geocentric midpoint of event [JD]: 2460571.49675250 * magnitude of target star: 11.08 * magnitude drop [mag]: 5.83 * estimated maximum duration [s]: 1.820 * Moon: 100 % sunlit, 79° distance * Sun: 103° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 22 * 1 sigma uncertainty interval [path widths]: +/- 0.25 * 1 sigma uncertainty interval [seconds]: +/- 3.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.029, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.029", 0.003", 82°) * approx speed of asteroid's shadow [km/s]: 11.8047 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1830-01947-1 by 2803 Vilho on 2024 Sep 17 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 - 12 0 0 0 19 0 23 46 28.8 1 67 -76 0 12 32 0 25 29 0 9 18 0 28 43 .... - 11 0 0 0 45 8 23 46 29.1 2 67 -77 0 38 39 0 51 37 0 35 25 0 54 51 -0.22 - 10 0 0 1 11 31 23 46 29.6 3 67 -78 1 5 2 1 18 1 1 1 47 1 21 16 -0.21 - 9 0 0 1 38 10 23 46 30.3 4 67 -79 1 31 40 1 44 40 1 28 25 1 47 55 -0.21 - 8 0 0 2 5 3 23 46 31.1 5 67 -79 1 58 32 2 11 34 1 55 17 2 14 49 -0.21 - 7 0 0 2 32 10 23 46 32.2 6 67 -80 2 25 38 2 38 41 2 22 23 2 41 57 -0.21 - 6 0 0 2 59 30 23 46 33.5 8 67 -81 2 52 58 3 6 2 2 49 42 3 9 18 -0.21 - 5 0 0 3 27 3 23 46 35.0 9 67 -81 3 20 31 3 33 36 3 17 15 3 36 52 -0.21 - 4 0 0 3 54 48 23 46 36.7 10 67 -82 3 48 15 4 1 21 3 44 59 4 4 38 -0.21 - 3 0 0 4 22 44 23 46 38.6 11 67 -82 4 16 11 4 29 18 4 12 54 4 32 35 -0.21 - 2 0 0 4 50 51 23 46 40.7 12 67 -82 4 44 18 4 57 25 4 41 1 5 0 42 -0.21 - 1 0 0 5 19 8 23 46 43.0 13 67 -82 5 12 34 5 25 43 5 9 17 5 29 0 -0.21 0 0 0 5 47 34 23 46 45.5 14 68 -82 5 41 0 5 54 9 5 37 42 5 57 27 -0.21 1 0 0 6 16 9 23 46 48.2 15 68 -82 6 9 34 6 22 44 6 6 16 6 26 2 -0.21 2 0 0 6 44 51 23 46 51.1 16 68 -82 6 38 16 6 51 27 6 34 58 6 54 45 -0.21 3 0 0 7 13 40 23 46 54.3 18 68 -81 7 7 5 7 20 16 7 3 47 7 23 34 -0.21 4 0 0 7 42 36 23 46 57.6 19 68 -80 7 36 0 7 49 12 7 32 42 7 52 30 -0.21 5 0 0 8 11 36 23 47 1.1 20 68 -80 8 5 0 8 18 13 8 1 42 8 21 31 -0.21 6 0 0 8 40 41 23 47 4.8 21 68 -79 8 34 5 8 47 18 8 30 47 8 50 37 -0.21 7 0 0 9 9 50 23 47 8.7 22 69 -78 9 3 13 9 16 27 8 59 55 9 19 46 -0.21 8 0 0 9 39 2 23 47 12.8 23 69 -77 9 32 25 9 45 39 9 29 6 9 48 58 -0.21 9 0 0 10 8 16 23 47 17.1 24 69 -76 10 1 38 10 14 53 9 58 20 10 18 12 -0.21 10 0 0 10 37 31 23 47 21.6 25 69 -75 10 30 53 10 44 8 10 27 35 10 47 27 -0.21 11 0 0 11 6 46 23 47 26.2 26 70 -74 11 0 9 11 13 24 10 56 50 11 16 43 -0.21 12 0 0 11 36 1 23 47 31.0 27 70 -73 11 29 23 11 42 39 11 26 5 11 45 58 -0.21 13 0 0 12 5 15 23 47 36.1 29 70 -72 11 58 37 12 11 52 11 55 18 12 15 11 -0.21 14 0 0 12 34 26 23 47 41.3 30 70 -71 12 27 48 12 41 4 12 24 30 12 44 23 -0.21 15 0 0 13 3 34 23 47 46.6 31 71 -70 12 56 57 13 10 12 12 53 38 13 13 31 -0.21 16 0 0 13 32 39 23 47 52.1 32 71 -69 13 26 1 13 39 17 13 22 43 13 42 36 -0.21 17 0 0 14 1 39 23 47 57.8 33 71 -68 13 55 1 14 8 17 13 51 43 14 11 36 -0.20 18 0 0 14 30 33 23 48 3.7 34 72 -67 14 23 56 14 37 11 14 20 38 14 40 30 -0.20 19 0 0 14 59 22 23 48 9.7 35 72 -66 14 52 44 15 5 59 14 49 26 15 9 18 -0.20 20 0 0 15 28 3 23 48 15.8 36 72 -65 15 21 26 15 34 40 15 18 7 15 37 59 -0.20 21 0 0 15 56 36 23 48 22.2 37 73 -64 15 49 59 16 3 13 15 46 41 16 6 31 -0.20 22 0 0 16 25 0 23 48 28.6 38 73 -63 16 18 24 16 31 37 16 15 6 16 34 55 -0.20 23 0 0 16 53 15 23 48 35.2 40 74 -62 16 46 39 16 59 52 16 43 21 17 3 10 -0.20 24 0 0 17 21 20 23 48 41.9 41 74 -61 17 14 44 17 27 56 17 11 26 17 31 14 -0.20 25 0 0 17 49 14 23 48 48.8 42 75 -60 17 42 38 17 55 50 17 39 21 17 59 8 -0.20 26 0 0 18 16 56 23 48 55.7 43 75 -59 18 10 21 18 23 31 18 7 3 18 26 49 -0.20 27 0 0 18 44 26 23 49 2.8 44 76 -57 18 37 51 18 51 1 18 34 34 18 54 18 -0.20 28 0 0 19 11 42 23 49 10.0 45 76 -56 19 5 8 19 18 17 19 1 51 19 21 34 -0.20 29 0 0 19 38 45 23 49 17.3 46 77 -55 19 32 11 19 45 19 19 28 54 19 48 36 -0.20 30 0 0 20 5 34 23 49 24.8 47 77 -54 19 59 0 20 12 7 19 55 44 20 15 24 -0.20 31 0 0 20 32 7 23 49 32.3 48 78 -53 20 25 34 20 38 40 20 22 18 20 41 56 -0.20 32 0 0 20 58 25 23 49 39.9 49 78 -52 20 51 52 21 4 57 20 48 36 21 8 13 -0.20 33 0 0 21 24 26 23 49 47.6 50 79 -51 21 17 54 21 30 58 21 14 38 21 34 14 -0.20 34 0 0 21 50 10 23 49 55.4 51 80 -50 21 43 39 21 56 42 21 40 24 21 59 57 -0.20 35 0 0 22 15 37 23 50 3.3 52 80 -49 22 9 7 22 22 8 22 5 52 22 25 24 -0.20 36 0 0 22 40 47 23 50 11.2 53 81 -48 22 34 17 22 47 17 22 31 2 22 50 32 -0.20 37 0 0 23 5 37 23 50 19.3 54 82 -47 22 59 8 23 12 7 22 55 54 23 15 21 -0.20 38 0 0 23 30 9 23 50 27.3 55 83 -46 23 23 41 23 36 38 23 20 26 23 39 52 -0.20 39 0 0 23 54 22 23 50 35.5 56 84 -45 23 47 54 24 0 50 23 44 40 24 4 4 -0.20 40 0 0 24 18 14 23 50 43.7 57 84 -44 24 11 47 24 24 42 24 8 33 24 27 55 -0.20 41 0 0 24 41 47 23 50 52.0 58 85 -43 24 35 20 24 48 13 24 32 7 24 51 26 -0.20 42 0 0 25 4 58 23 51 0.3 59 86 -42 24 58 32 25 11 24 24 55 20 25 14 37 -0.20 43 0 0 25 27 49 23 51 8.6 60 87 -41 25 21 24 25 34 14 25 18 12 25 37 27 -0.20 44 0 0 25 50 18 23 51 17.0 61 88 -40 25 43 54 25 56 43 25 40 42 25 59 55 -0.20 45 0 0 26 12 26 23 51 25.5 62 89 -39 26 6 3 26 18 50 26 2 51 26 22 2 -0.20 46 0 0 26 34 12 23 51 33.9 63 90 -38 26 27 49 26 40 35 26 24 38 26 43 46 -0.20 47 0 0 26 55 35 23 51 42.4 64 92 -37 26 49 13 27 1 58 26 46 3 27 5 9 -0.20 48 0 0 27 16 36 23 51 50.9 65 93 -36 27 10 15 27 22 58 27 7 5 27 26 8 -0.20 49 0 0 27 37 15 23 51 59.5 65 94 -35 27 30 54 27 43 35 27 27 44 27 46 45 -0.20 50 0 0 27 57 30 23 52 8.0 66 96 -34 27 51 10 28 3 49 27 48 0 28 6 59 -0.19 51 0 0 28 17 22 23 52 16.6 67 97 -33 28 11 3 28 23 40 28 7 54 28 26 50 -0.19 52 0 0 28 36 50 23 52 25.2 68 99 -32 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17 57 0 2 3.8 + 39 274 35 33 11 52 33 24 2 33 8 50 33 27 4 -0.20 131 0 0 33 5 55 0 2 9.2 + 39 275 36 32 59 49 33 12 0 32 56 47 33 15 3 -0.20 132 0 0 32 53 29 0 2 14.4 + 38 275 37 32 47 23 32 59 35 32 44 20 33 2 38 -0.20 133 0 0 32 40 39 0 2 19.6 + 37 276 38 32 34 33 32 46 46 32 31 29 32 49 49 -0.20 134 0 0 32 27 26 0 2 24.6 + 36 277 39 32 21 19 32 33 33 32 18 15 32 36 37 -0.20 135 0 0 32 13 49 0 2 29.6 + 35 277 40 32 7 41 32 19 57 32 4 37 32 23 1 -0.20 136 0 0 31 59 49 0 2 34.5 + 34 278 40 31 53 40 32 5 58 31 50 36 32 9 2 -0.20 137 0 0 31 45 25 0 2 39.3 + 33 278 41 31 39 16 31 51 35 31 36 11 31 54 39 -0.20 138 0 0 31 30 38 0 2 44.0 + 32 279 42 31 24 28 31 36 48 31 21 23 31 39 53 -0.20 139 0 0 31 15 27 0 2 48.7 + 31 280 43 31 9 16 31 21 38 31 6 11 31 24 43 -0.20 140 0 0 30 59 53 0 2 53.2 + 31 280 44 30 53 42 31 6 5 30 50 36 31 9 11 -0.20 141 0 0 30 43 56 0 2 57.6 + 30 281 45 30 37 44 30 50 8 30 34 38 30 53 14 -0.20 142 0 0 30 27 36 0 3 1.9 + 29 281 46 30 21 23 30 33 49 30 18 16 30 36 55 -0.20 143 0 0 30 10 52 0 3 6.1 + 28 282 47 30 4 39 30 17 6 30 1 32 30 20 13 -0.21 144 0 0 29 53 46 0 3 10.2 + 27 282 47 29 47 32 30 0 1 29 44 25 30 3 8 -0.21 145 0 0 29 36 17 0 3 14.2 + 26 283 48 29 30 2 29 42 32 29 26 54 29 45 40 -0.21 146 0 0 29 18 25 0 3 18.1 + 25 284 49 29 12 9 29 24 41 29 9 2 29 27 49 -0.21 147 0 0 29 0 11 0 3 21.8 + 24 284 50 28 53 55 29 6 28 28 50 46 29 9 36 -0.21 148 0 0 28 41 35 0 3 25.5 + 23 285 51 28 35 17 28 47 52 28 32 9 28 51 1 -0.21 149 0 0 28 22 36 0 3 29.0 + 22 285 52 28 16 18 28 28 54 28 13 9 28 32 3 -0.21 150 0 0 28 3 15 0 3 32.4 + 21 286 53 27 56 56 28 9 34 27 53 47 28 12 44 -0.21 151 0 0 27 43 33 0 3 35.7 + 20 286 54 27 37 13 27 49 53 27 34 4 27 53 3 -0.21 152 0 0 27 23 29 0 3 38.8 + 19 287 55 27 17 9 27 29 49 27 13 59 27 33 0 -0.21 153 0 0 27 3 4 0 3 41.8 + 18 287 55 26 56 43 27 9 25 26 53 32 27 12 35 -0.21 154 0 0 26 42 17 0 3 44.7 + 17 288 56 26 35 56 26 48 39 26 32 45 26 51 50 -0.21 155 0 0 26 21 10 0 3 47.4 + 17 288 57 26 14 48 26 27 33 26 11 37 26 30 44 -0.22 156 0 0 25 59 43 0 3 50.0 + 16 288 58 25 53 20 26 6 6 25 50 8 26 9 18 -0.22 157 0 0 25 37 55 0 3 52.5 + 15 289 59 25 31 31 25 44 19 25 28 19 25 47 31 -0.22 158 0 0 25 15 47 0 3 54.8 + 14 289 60 25 9 23 25 22 12 25 6 11 25 25 24 -0.22 159 0 0 24 53 20 0 3 56.9 + 13 290 61 24 46 55 24 59 45 24 43 43 25 2 58 -0.22 160 0 0 24 30 34 0 3 59.0 + 12 290 62 24 24 8 24 37 0 24 20 55 24 40 13 -0.22 161 0 0 24 7 29 0 4 0.8 + 11 291 63 24 1 2 24 13 55 23 57 49 24 17 8 -0.23 162 0 0 23 44 5 0 4 2.5 + 10 291 63 23 37 38 23 50 32 23 34 25 23 53 46 -0.23 163 0 0 23 20 23 0 4 4.0 + 9 291 64 23 13 56 23 26 51 23 10 42 23 30 5 -0.23 164 0 0 22 56 24 0 4 5.4 + 8 292 65 22 49 56 23 2 53 22 46 42 23 6 7 -0.24 165 0 0 22 32 8 0 4 6.6 + 7 292 66 22 25 39 22 38 37 22 22 25 22 41 51 -0.24 166 0 0 22 7 35 0 4 7.7 + 6 293 67 22 1 5 22 14 4 21 57 51 22 17 19 -0.25 167 0 0 21 42 46 0 4 8.5 + 5 293 68 21 36 16 21 49 16 21 33 1 21 52 31 -0.26 168 0 0 21 17 41 0 4 9.2 + 4 293 68 21 11 10 21 24 11 21 7 55 21 27 27 -0.27 169 0 0 20 52 21 0 4 9.8 + 3 294 69 20 45 50 20 58 52 20 42 34 21 2 7 -0.30 170 0 0 20 26 46 0 4 10.1 + 1 294 70 20 20 15 20 33 17 20 16 59 20 36 33 -0.37 171 0 0 20 0 57 0 4 10.3 + 0 294 71 19 54 25 20 7 29 19 51 10 20 10 45 -0.76 Uncertainty in time = +/- 4 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: TYC 1830-01947-1 * constellation : Taurus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 04 42 57.6772 DE: +23 02 24.535 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 04 42 57.6774 DE: +23 02 24.535 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.1 * B mag [mag]: 11.5 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2803) Vilho asteroid class: approx. diameter [km]: 21 approx. diameter ["]: 0.014 distance from Earth [AU]: 2.16660 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#43 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): 0.029", 0.003", 82.064° remarks: * orbital elements for (2803)Vilho : Mean anomaly = 350.9082660838 deg Arg. of pericenter = 42.5599064226 deg Long. of node = 20.7868755172 deg Inclination = 1.3289971595 deg Eccentricity = 0.1807505389 Semimajor axis = 3.1409875672 AU Perihelion dist = 2.5732523716 AU Mag: H = 12.10, G = 0.15 Epoch of elements : MJD 60570.99675250 TDT (2024 Sep 17.9968) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#432023Apr24,1.82,2024,9,17,23.922060,-0.035074,0.182565,6.545328,1.246309,-0.005389,-0.000716,0.000000,0.000000 74.8790,23.0877,179.71,1.76,False TYC 1830-01947-1,4.71602143,23.0401486,11.54,11.08,10.83,0.0,0,,4.74085492,23.0876903,5.83,5.63,0,0,0 2803,Vilho,16.90,21.464,2.1666,0,0,1.925,5.06,,1.6,0 0,350.7318,2024,9,17,42.5599,20.7869,1.3290,0.18075,3.14099,2.57325,12.09,5.0,0.15 1.250,0.0290,0.0031,82,0.0034,Known errors,1.16,0,-1,-1 20240917_1947-1,60140.57 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 13:40 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org