IOTA/IOTA-ES occultation update for (6953) Davepierce / UCAC4 340-111835 event on 2024 Oct 02, 00:20 UT Visible from Summary ------- On 2024 Oct 02 UT, the 16.152 km diameter asteroid (6953) Davepierce will occult a 11.5 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 6.56 mag to 18.07 mag (the magnitude of the asteroid) for at most 0.640 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: 89 * date and approx. time of event: 2024 Oct 02, 00:16 - 2024 Oct 02, 00:24 * geocentric midpoint of event [JD]: 2460585.51413550 * magnitude of target star: 11.51 * magnitude drop [mag]: 6.56 * estimated maximum duration [s]: 0.640 * Moon: 1 % sunlit, 86° distance * Sun: 78° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 17 * 1 sigma uncertainty interval [path widths]: +/- 0.54 * 1 sigma uncertainty interval [seconds]: +/- 1.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.022, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.022", 0.005", 92°) * approx speed of asteroid's shadow [km/s]: 25.1503 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 340-111835 by 6953 Davepierce on 2024 Oct 2 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 171 0 0 19 40 51 0 16 20.8 1 114 67 19 35 49 19 45 52 19 30 22 19 51 20 .... 172 0 0 19 15 58 0 16 20.8 2 114 67 19 10 56 19 20 59 19 5 29 19 26 27 -0.12 173 0 0 18 51 2 0 16 21.0 3 114 68 18 46 0 18 56 3 18 40 33 19 1 31 -0.20 174 0 0 18 26 3 0 16 21.3 4 115 68 18 21 1 18 31 4 18 15 34 18 36 32 -0.24 175 0 0 18 1 2 0 16 21.6 5 115 68 17 56 0 18 6 3 17 50 33 18 11 31 -0.26 176 0 0 17 35 59 0 16 22.0 6 115 69 17 30 58 17 41 1 17 25 31 17 46 28 -0.27 177 0 0 17 10 56 0 16 22.6 7 116 69 17 5 54 17 15 57 17 0 28 17 21 24 -0.28 178 0 0 16 45 52 0 16 23.2 8 116 69 16 40 51 16 50 53 16 35 24 16 56 20 -0.28 179 0 0 16 20 49 0 16 23.9 9 116 69 16 15 48 16 25 50 16 10 21 16 31 17 -0.29 -180 0 0 15 55 46 0 16 24.7 10 117 69 15 50 46 16 0 47 15 45 19 16 6 14 -0.29 -179 0 0 15 30 46 0 16 25.6 11 117 69 15 25 45 15 35 47 15 20 19 15 41 14 -0.30 -178 0 0 15 5 48 0 16 26.5 12 117 69 15 0 47 15 10 48 14 55 21 15 16 15 -0.30 -177 0 0 14 40 52 0 16 27.6 13 117 69 14 35 52 14 45 53 14 30 26 14 51 19 -0.30 -176 0 0 14 16 1 0 16 28.8 14 118 69 14 11 1 14 21 1 14 5 35 14 26 27 -0.30 -175 0 0 13 51 13 0 16 30.0 15 118 69 13 46 14 13 56 14 13 40 48 14 1 40 -0.30 -174 0 0 13 26 31 0 16 31.3 16 118 69 13 21 31 13 31 31 13 16 6 13 36 57 -0.31 -173 0 0 13 1 54 0 16 32.7 17 118 68 12 56 55 13 6 54 12 51 30 13 12 19 -0.31 -172 0 0 12 37 24 0 16 34.3 18 119 68 12 32 24 12 42 23 12 27 0 12 47 48 -0.31 -171 0 0 12 13 0 0 16 35.9 19 119 68 12 8 1 12 17 59 12 2 37 12 23 24 -0.31 -170 0 0 11 48 44 0 16 37.5 20 119 67 11 43 45 11 53 42 11 38 21 11 59 7 -0.31 -169 0 0 11 24 35 0 16 39.3 21 119 67 11 19 37 11 29 34 11 14 13 11 34 58 -0.31 -168 0 0 11 0 36 0 16 41.2 23 120 66 10 55 38 11 5 34 10 50 14 11 10 58 -0.31 -167 0 0 10 36 46 0 16 43.1 24 120 66 10 31 48 10 41 43 10 26 25 10 47 7 -0.31 -166 0 0 10 13 5 0 16 45.2 25 120 65 10 8 8 10 18 3 10 2 45 10 23 26 -0.31 -165 0 0 9 49 35 0 16 47.3 26 120 64 9 44 38 9 54 33 9 39 16 9 59 55 -0.31 -164 0 0 9 26 17 0 16 49.5 27 121 64 9 21 20 9 31 13 9 15 58 9 36 36 -0.31 -163 0 0 9 3 10 0 16 51.7 28 121 63 8 58 13 9 8 6 8 52 52 9 13 28 -0.32 -162 0 0 8 40 15 0 16 54.1 29 121 62 8 35 19 8 45 11 8 29 58 8 50 33 -0.32 -161 0 0 8 17 33 0 16 56.5 30 121 62 8 12 37 8 22 28 8 7 16 8 27 50 -0.32 -160 0 0 7 55 4 0 16 59.1 31 122 61 7 50 9 7 59 59 7 44 49 8 5 20 -0.32 -159 0 0 7 32 49 0 17 1.7 32 122 60 7 27 54 7 37 44 7 22 35 7 43 5 -0.32 -158 0 0 7 10 49 0 17 4.3 33 122 59 7 5 54 7 15 43 7 0 35 7 21 3 -0.32 -157 0 0 6 49 3 0 17 7.1 34 123 58 6 44 9 6 53 57 6 38 50 6 59 17 -0.32 -156 0 0 6 27 33 0 17 9.9 35 123 57 6 22 40 6 32 27 6 17 21 6 37 46 -0.32 -155 0 0 6 6 19 0 17 12.8 36 123 57 6 1 26 6 11 12 5 56 8 6 16 31 -0.32 -154 0 0 5 45 21 0 17 15.8 37 123 56 5 40 28 5 50 14 5 35 11 5 55 32 -0.32 -153 0 0 5 24 40 0 17 18.8 38 124 55 5 19 48 5 29 33 5 14 31 5 34 50 -0.32 -152 0 0 5 4 16 0 17 21.9 39 124 54 4 59 25 5 9 8 4 54 8 5 14 26 -0.32 -151 0 0 4 44 10 0 17 25.1 40 124 53 4 39 19 4 49 2 4 34 3 4 54 19 -0.32 -150 0 0 4 24 22 0 17 28.3 41 125 52 4 19 32 4 29 14 4 14 16 4 34 30 -0.32 -149 0 0 4 4 53 0 17 31.6 42 125 51 4 0 3 4 9 44 3 54 47 4 15 0 -0.32 -148 0 0 3 45 43 0 17 35.0 43 125 50 3 40 53 3 50 33 3 35 38 3 55 48 -0.32 -147 0 0 3 26 52 0 17 38.4 44 126 49 3 22 2 3 31 41 3 16 48 3 36 56 -0.32 -146 0 0 3 8 20 0 17 41.9 45 126 48 3 3 31 3 13 10 2 58 17 3 18 24 -0.32 -145 0 0 2 50 9 0 17 45.4 46 127 47 2 45 20 2 54 58 2 40 7 3 0 12 -0.32 -144 0 0 2 32 18 0 17 49.0 47 127 46 2 27 30 2 37 7 2 22 17 2 42 20 -0.32 -143 0 0 2 14 48 0 17 52.6 48 128 45 2 10 0 2 19 36 2 4 48 2 24 49 -0.32 -142 0 0 1 57 39 0 17 56.3 49 128 45 1 52 51 2 2 26 1 47 40 2 7 39 -0.32 -141 0 0 1 40 51 0 18 0.1 50 129 44 1 36 4 1 45 38 1 30 53 1 50 50 -0.32 -140 0 0 1 24 25 0 18 3.9 51 129 43 1 19 38 1 29 12 1 14 28 1 34 23 -0.32 -139 0 0 1 8 21 0 18 7.7 52 130 42 1 3 35 1 13 7 0 58 24 1 18 18 -0.33 -138 0 0 0 52 39 0 18 11.6 53 130 41 0 47 53 0 57 25 0 42 43 1 2 35 -0.33 -137 0 0 0 37 20 0 18 15.5 54 131 40 0 32 34 0 42 5 0 27 25 0 47 15 -0.33 -136 0 0 0 22 23 0 18 19.5 55 132 39 0 17 38 0 27 8 0 12 29 0 32 17 -0.33 -135 0 0 0 7 49 0 18 23.5 56 132 38 0 3 5 0 12 34 - 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60 0 0 1 54 17 0 23 30.7 36 241 -39 1 49 30 1 59 5 1 44 19 2 4 17 -0.33 - 59 0 0 2 11 19 0 23 33.6 35 241 -40 2 6 31 2 16 6 2 1 19 2 21 19 -0.33 - 58 0 0 2 28 41 0 23 36.3 34 241 -41 2 23 53 2 33 29 2 18 40 2 38 42 -0.33 - 57 0 0 2 46 23 0 23 39.0 33 241 -42 2 41 35 2 51 12 2 36 22 2 56 26 -0.33 - 56 0 0 3 4 26 0 23 41.6 32 242 -43 2 59 38 3 9 15 2 54 24 3 14 29 -0.33 - 55 0 0 3 22 49 0 23 44.2 31 242 -44 3 18 0 3 27 39 3 12 46 3 32 53 -0.33 - 54 0 0 3 41 32 0 23 46.7 30 242 -45 3 36 42 3 46 22 3 31 27 3 51 36 -0.33 - 53 0 0 4 0 33 0 23 49.1 29 242 -46 3 55 43 4 5 24 3 50 28 4 10 39 -0.33 - 52 0 0 4 19 54 0 23 51.4 28 242 -47 4 15 3 4 24 44 4 9 47 4 30 0 -0.33 - 51 0 0 4 39 32 0 23 53.6 27 242 -48 4 34 41 4 44 24 4 29 25 4 49 40 -0.33 - 50 0 0 4 59 29 0 23 55.8 26 243 -49 4 54 38 5 4 21 4 49 21 5 9 38 -0.33 - 49 0 0 5 19 43 0 23 57.9 25 243 -50 5 14 52 5 24 36 5 9 35 5 29 53 -0.33 - 48 0 0 5 40 15 0 23 59.9 23 243 -51 5 35 23 5 45 8 5 30 5 5 50 25 -0.33 - 47 0 0 6 1 3 0 24 1.8 22 243 -52 5 56 10 6 5 56 5 50 53 6 11 14 -0.33 - 46 0 0 6 22 8 0 24 3.7 21 243 -53 6 17 15 6 27 1 6 11 56 6 32 20 -0.33 - 45 0 0 6 43 28 0 24 5.4 20 243 -54 6 38 34 6 48 22 6 33 16 6 53 41 -0.33 - 44 0 0 7 5 4 0 24 7.1 19 244 -55 7 0 10 7 9 58 6 54 51 7 15 17 -0.33 - 43 0 0 7 26 54 0 24 8.7 18 244 -56 7 22 0 7 31 49 7 16 40 7 37 9 -0.33 - 42 0 0 7 48 59 0 24 10.2 17 244 -57 7 44 4 7 53 54 7 38 44 7 59 14 -0.33 - 41 0 0 8 11 18 0 24 11.6 16 244 -58 8 6 22 8 16 13 8 1 2 8 21 34 -0.33 - 40 0 0 8 33 49 0 24 12.9 15 244 -59 8 28 54 8 38 45 8 23 33 8 44 6 -0.33 - 39 0 0 8 56 34 0 24 14.2 14 244 -59 8 51 38 9 1 30 8 46 17 9 6 52 -0.33 - 38 0 0 9 19 31 0 24 15.3 13 245 -60 9 14 35 9 24 28 9 9 13 9 29 50 -0.33 - 37 0 0 9 42 40 0 24 16.4 12 245 -61 9 37 43 9 47 37 9 32 21 9 52 59 -0.33 - 36 0 0 10 5 59 0 24 17.3 11 245 -62 10 1 2 10 10 57 9 55 40 10 16 19 -0.33 - 35 0 0 10 29 30 0 24 18.2 10 245 -63 10 24 32 10 34 27 10 19 10 10 39 50 -0.33 - 34 0 0 10 53 10 0 24 19.0 9 245 -64 10 48 12 10 58 8 10 42 49 11 3 31 -0.33 - 33 0 0 11 16 59 0 24 19.7 8 246 -65 11 12 1 11 21 58 11 6 38 11 27 22 -0.33 - 32 0 0 11 40 58 0 24 20.3 7 246 -66 11 36 0 11 45 56 11 30 36 11 51 20 -0.33 - 31 0 0 12 5 4 0 24 20.8 5 246 -66 12 0 6 12 10 3 11 54 42 12 15 28 -0.33 - 30 0 0 12 29 18 0 24 21.3 4 246 -67 12 24 20 12 34 17 12 18 55 12 39 42 -0.33 - 29 0 0 12 53 39 0 24 21.6 3 246 -68 12 48 40 12 58 39 12 43 16 13 4 4 -0.33 - 28 0 0 13 18 7 0 24 21.8 2 247 -69 13 13 7 13 23 6 13 7 43 13 28 32 -0.34 - 27 0 0 13 42 40 0 24 22.0 1 247 -69 13 37 40 13 47 40 13 32 15 13 53 5 -0.35 - 26 0 0 14 7 18 0 24 22.0 0 247 -70 14 2 18 14 12 18 13 56 53 14 17 44 -0.45 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 340-111835 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 48 02.9538 DE: -22 07 19.746 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 48 02.9537 DE: -22 07 19.746 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.5 * B mag [mag]: 11.9 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (6953) Davepierce asteroid class: approx. diameter [km]: 16 approx. diameter ["]: 0.009 distance from Earth [AU]: 2.58750 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#49 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): 0.022", 0.005", 91.908° remarks: * orbital elements for (6953)Davepierce : Mean anomaly = 0.2486612643 deg Arg. of pericenter = 131.9247887188 deg Long. of node = 157.2914443087 deg Inclination = 1.7482384740 deg Eccentricity = 0.1740376196 Semimajor axis = 3.1206453636 AU Perihelion dist = 2.5775356728 AU Mag: H = 12.88, G = 0.15 Epoch of elements : MJD 60585.01413550 TDT (2024 Oct 02.0141) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#492023Apr25,0.64,2024,10,2,0.339252,0.016600,0.314116,14.175067,-0.761738,0.005573,-0.000076,0.000000,0.000000 -108.9245,-22.1314,172.25,-3.69,False UCAC4 340-111835,17.80082052,-22.1221518,11.86,11.51,11.32,0.0,0,,17.82555178,-22.1314165,6.57,6.31,0,0,0 6953,Davepierce,18.07,16.152,2.5875,0,0,3.467,-2.59,,1.4,0 0,0.0673,2024,10,1,131.9248,157.2914,1.7482,0.17404,3.12065,2.57754,12.88,5.0,0.15 1.543,0.0217,0.0047,92,0.0047,Known errors,0.89,0,-1,-1 20241002_111835,60140.60 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 14:28 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org