IOTA/IOTA-ES occultation update for (4970) Druyan / G174331.0-235503 event on 2024 Oct 06, 11:05 UT Visible from Summary ------- On 2024 Oct 06 UT, the 8.08963702409217 km diameter asteroid (4970) Druyan will occult a 11.6 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 7.27 mag to 18.82 mag (the magnitude of the asteroid) for at most 0.490 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 Oct 06, 11:00 - 2024 Oct 06, 11:09 * geocentric midpoint of event [JD]: 2460589.96183604 * magnitude of target star: 11.55 * magnitude drop [mag]: 7.27 * estimated maximum duration [s]: 0.490 * Moon: 12 % sunlit, 32° distance * Sun: 73° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 13 * 1 sigma uncertainty interval [path widths]: +/- 0.21 * 1 sigma uncertainty interval [seconds]: +/- 0.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.010, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.010", 0.001", 83°) * approx speed of asteroid's shadow [km/s]: 24.7794 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of G174331.0-235503 by 4970 Druyan on 2024 Oct 6 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 2 0 0 14 5 0 11 1 0.2 0 115 68 14 1 8 14 8 53 13 59 31 14 10 30 14 3 49 14 6 12 .... 3 0 0 13 38 7 11 1 0.2 1 115 69 13 34 15 13 41 59 13 32 37 13 43 37 13 36 56 13 39 18 -0.08 4 0 0 13 11 20 11 1 0.4 2 115 70 13 7 29 13 15 12 13 5 51 13 16 50 13 10 9 13 12 32 -0.20 5 0 0 12 44 42 11 1 0.6 3 115 71 12 40 51 12 48 33 12 39 13 12 50 11 12 43 31 12 45 53 -0.25 6 0 0 12 18 12 11 1 1.0 4 116 71 12 14 21 12 22 3 12 12 43 12 23 40 12 17 1 12 19 23 -0.27 7 0 0 11 51 50 11 1 1.4 6 116 72 11 48 0 11 55 41 11 46 23 11 57 19 11 50 40 11 53 1 -0.29 8 0 0 11 25 39 11 1 2.0 7 116 73 11 21 49 11 29 30 11 20 12 11 31 7 11 24 28 11 26 50 -0.30 9 0 0 10 59 39 11 1 2.6 8 116 73 10 55 48 11 3 29 10 54 11 11 5 6 10 58 28 11 0 49 -0.30 10 0 0 10 33 49 11 1 3.3 9 116 74 10 29 59 10 37 39 10 28 22 10 39 16 10 32 39 10 35 0 -0.31 11 0 0 10 8 12 11 1 4.2 10 117 74 10 4 22 10 12 1 10 2 45 10 13 38 10 7 1 10 9 22 -0.31 12 0 0 9 42 47 11 1 5.1 11 117 75 9 38 57 9 46 36 9 37 21 9 48 12 9 41 36 9 43 57 -0.32 13 0 0 9 17 35 11 1 6.1 12 117 75 9 13 46 9 21 24 9 12 9 9 23 0 9 16 24 9 18 45 -0.32 14 0 0 8 52 37 11 1 7.2 13 117 76 8 48 48 8 56 25 8 47 12 8 58 2 8 51 26 8 53 47 -0.32 15 0 0 8 27 53 11 1 8.4 14 117 76 8 24 5 8 31 41 8 22 29 8 33 17 8 26 43 8 29 3 -0.32 16 0 0 8 3 24 11 1 9.7 15 118 76 7 59 37 8 7 12 7 58 1 8 8 48 8 2 14 8 4 34 -0.33 17 0 0 7 39 11 11 1 11.1 16 118 76 7 35 24 7 42 59 7 33 48 7 44 35 7 38 2 7 40 21 -0.33 18 0 0 7 15 15 11 1 12.6 17 118 76 7 11 28 7 19 2 7 9 52 7 20 37 7 14 5 7 16 24 -0.33 19 0 0 6 51 35 11 1 14.2 18 118 76 6 47 48 6 55 21 6 46 13 6 56 57 6 50 25 6 52 44 -0.33 20 0 0 6 28 12 11 1 15.8 19 118 76 6 24 26 6 31 58 6 22 50 6 33 34 6 27 2 6 29 21 -0.33 21 0 0 6 5 7 11 1 17.6 21 118 75 6 1 21 6 8 53 5 59 46 6 10 28 6 3 58 6 6 16 -0.33 22 0 0 5 42 20 11 1 19.4 22 119 75 5 38 35 5 46 6 5 37 0 5 47 41 5 41 11 5 43 30 -0.33 23 0 0 5 19 53 11 1 21.3 23 119 74 5 16 8 5 23 38 5 14 33 5 25 13 5 18 43 5 21 2 -0.33 24 0 0 4 57 44 11 1 23.3 24 119 74 4 53 59 5 1 29 4 52 25 5 3 4 4 56 35 4 58 53 -0.34 25 0 0 4 35 55 11 1 25.4 25 119 73 4 32 11 4 39 40 4 30 37 4 41 14 4 34 47 4 37 4 -0.34 26 0 0 4 14 27 11 1 27.6 26 119 73 4 10 43 4 18 11 4 9 9 4 19 45 4 13 18 4 15 36 -0.34 27 0 0 3 53 19 11 1 29.8 27 119 72 3 49 36 3 57 3 3 48 2 3 58 37 3 52 11 3 54 28 -0.34 28 0 0 3 32 33 11 1 32.2 28 120 71 3 28 50 3 36 16 3 27 16 3 37 50 3 31 24 3 33 41 -0.34 29 0 0 3 12 8 11 1 34.6 29 120 71 3 8 25 3 15 50 3 6 51 3 17 24 3 10 59 3 13 16 -0.34 30 0 0 2 52 4 11 1 37.1 30 120 70 2 48 22 2 55 47 2 46 49 2 57 20 2 50 56 2 53 13 -0.34 31 0 0 2 32 24 11 1 39.7 31 120 69 2 28 42 2 36 5 2 27 8 2 37 39 2 31 16 2 33 32 -0.34 32 0 0 2 13 5 11 1 42.3 32 120 68 2 9 24 2 16 47 2 7 51 2 18 20 2 11 57 2 14 13 -0.34 33 0 0 1 54 10 11 1 45.0 33 120 67 1 50 29 1 57 51 1 48 56 1 59 24 1 53 2 1 55 18 -0.34 34 0 0 1 35 38 11 1 47.8 34 121 67 1 31 58 1 39 19 1 30 25 1 40 52 1 34 31 1 36 46 -0.34 35 0 0 1 17 30 11 1 50.7 35 121 66 1 13 50 1 21 10 1 12 17 1 22 43 1 16 22 1 18 38 -0.34 36 0 0 0 59 46 11 1 53.6 36 121 65 0 56 6 1 3 26 0 54 33 1 4 58 0 58 38 1 0 53 -0.34 37 0 0 0 42 26 11 1 56.6 37 121 64 0 38 46 0 46 5 0 37 14 0 47 38 0 41 18 0 43 33 -0.34 38 0 0 0 25 30 11 1 59.7 38 121 63 0 21 51 0 29 10 0 20 19 0 30 42 0 24 23 0 26 38 -0.34 39 0 0 0 9 0 11 2 2.8 39 122 62 0 5 21 0 12 39 0 3 49 0 14 11 0 7 53 0 10 7 -0.34 40 0 0 - 0 7 6 11 2 6.0 40 122 61 - 0 10 44 - 0 3 27 - 0 12 16 - 0 1 55 - 0 8 13 - 0 5 59 -0.34 41 0 0 - 0 22 46 11 2 9.2 41 122 60 - 0 26 24 - 0 19 8 - 0 27 56 - 0 17 36 - 0 23 53 - 0 21 39 -0.35 42 0 0 - 0 38 1 11 2 12.5 42 123 59 - 0 41 38 - 0 34 23 - 0 43 10 - 0 32 51 - 0 39 8 - 0 36 54 -0.35 43 0 0 - 0 52 50 11 2 15.9 43 123 58 - 0 56 27 - 0 49 13 - 0 57 59 - 0 47 41 - 0 53 57 - 0 51 43 -0.35 44 0 0 - 1 7 13 11 2 19.3 44 123 57 - 1 10 50 - 1 3 36 - 1 12 21 - 1 2 5 - 1 8 20 - 1 6 6 -0.35 45 0 0 - 1 21 10 11 2 22.8 45 123 56 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36 39 1 27 45 1 38 12 1 31 51 1 34 6 -0.35 116 0 0 1 51 32 11 7 26.3 49 229 -16 1 47 51 1 55 13 1 46 18 1 56 46 1 50 24 1 52 40 -0.35 117 0 0 2 10 29 11 7 30.1 48 229 -17 2 6 47 2 14 10 2 5 14 2 15 44 2 9 21 2 11 37 -0.35 118 0 0 2 29 49 11 7 33.9 48 230 -18 2 26 7 2 33 31 2 24 34 2 35 5 2 28 41 2 30 58 -0.35 119 0 0 2 49 33 11 7 37.6 47 230 -19 2 45 51 2 53 15 2 44 17 2 54 49 2 48 25 2 50 41 -0.35 120 0 0 3 9 39 11 7 41.3 46 231 -20 3 5 56 3 13 22 3 4 22 3 14 56 3 8 31 3 10 47 -0.35 121 0 0 3 30 7 11 7 44.9 45 231 -21 3 26 24 3 33 51 3 24 50 3 35 25 3 28 59 3 31 16 -0.35 122 0 0 3 50 58 11 7 48.4 44 231 -22 3 47 14 3 54 41 3 45 40 3 56 16 3 49 49 3 52 6 -0.35 123 0 0 4 12 9 11 7 51.9 43 232 -23 4 8 26 4 15 53 4 6 51 4 17 28 4 11 1 4 13 18 -0.35 124 0 0 4 33 42 11 7 55.3 41 232 -24 4 29 58 4 37 27 4 28 23 4 39 1 4 32 33 4 34 51 -0.35 125 0 0 4 55 36 11 7 58.7 40 233 -25 4 51 51 4 59 21 4 50 16 5 0 55 4 54 27 4 56 45 -0.35 126 0 0 5 17 49 11 8 2.0 39 233 -26 5 14 4 5 21 35 5 12 29 5 23 10 5 16 40 5 18 59 -0.35 127 0 0 5 40 23 11 8 5.2 38 233 -27 5 36 37 5 44 9 5 35 2 5 45 44 5 39 14 5 41 32 -0.35 128 0 0 6 3 15 11 8 8.3 37 234 -28 5 59 29 6 7 1 5 57 54 6 8 37 6 2 6 6 4 25 -0.35 129 0 0 6 26 26 11 8 11.4 36 234 -29 6 22 40 6 30 13 6 21 4 6 31 48 6 25 17 6 27 36 -0.35 130 0 0 6 49 56 11 8 14.4 35 234 -30 6 46 9 6 53 42 6 44 33 6 55 18 6 48 46 6 51 5 -0.35 131 0 0 7 13 43 11 8 17.4 34 235 -31 7 9 55 7 17 30 7 8 20 7 19 6 7 12 33 7 14 52 -0.35 132 0 0 7 37 47 11 8 20.2 33 235 -32 7 33 59 7 41 34 7 32 23 7 43 10 7 36 37 7 38 56 -0.35 133 0 0 8 2 7 11 8 23.0 32 235 -33 7 58 19 8 5 55 7 56 43 8 7 31 8 0 57 8 3 17 -0.35 134 0 0 8 26 43 11 8 25.7 31 235 -34 8 22 55 8 30 32 8 21 19 8 32 8 8 25 33 8 27 54 -0.35 135 0 0 8 51 35 11 8 28.3 30 236 -35 8 47 46 8 55 24 8 46 10 8 57 0 8 50 25 8 52 45 -0.35 136 0 0 9 16 42 11 8 30.8 29 236 -36 9 12 53 9 20 31 9 11 16 9 22 7 9 15 31 9 17 52 -0.35 137 0 0 9 42 2 11 8 33.3 28 236 -37 9 38 13 9 45 51 9 36 36 9 47 28 9 40 52 9 43 12 -0.35 138 0 0 10 7 36 11 8 35.7 27 237 -38 10 3 46 10 11 26 10 2 9 10 13 3 10 6 25 10 8 46 -0.35 139 0 0 10 33 23 11 8 38.0 26 237 -39 10 29 33 10 37 13 10 27 56 10 38 50 10 32 12 10 34 33 -0.35 140 0 0 10 59 21 11 8 40.1 25 237 -40 10 55 31 11 3 12 10 53 54 11 4 49 10 58 11 11 0 32 -0.35 141 0 0 11 25 32 11 8 42.3 24 237 -41 11 21 41 11 29 22 11 20 4 11 31 0 11 24 21 11 26 42 -0.35 142 0 0 11 51 52 11 8 44.3 23 238 -42 11 48 1 11 55 44 11 46 24 11 57 21 11 50 41 11 53 3 -0.35 143 0 0 12 18 23 11 8 46.2 22 238 -43 12 14 32 12 22 15 12 12 54 12 23 52 12 17 12 12 19 34 -0.35 144 0 0 12 45 3 11 8 48.0 20 238 -44 12 41 12 12 48 55 12 39 34 12 50 33 12 43 52 12 46 15 -0.35 145 0 0 13 11 52 11 8 49.8 19 238 -45 13 8 0 13 15 44 13 6 23 13 17 22 13 10 41 13 13 4 -0.35 146 0 0 13 38 49 11 8 51.4 18 239 -46 13 34 57 13 42 41 13 33 19 13 44 19 13 37 38 13 40 0 -0.35 147 0 0 14 5 53 11 8 53.0 17 239 -47 14 2 1 14 9 45 14 0 23 14 11 23 14 4 42 14 7 4 -0.35 148 0 0 14 33 3 11 8 54.5 16 239 -48 14 29 10 14 36 56 14 27 32 14 38 34 14 31 52 14 34 14 -0.35 149 0 0 15 0 19 11 8 55.8 15 240 -49 14 56 26 15 4 12 14 54 48 15 5 50 14 59 7 15 1 30 -0.35 150 0 0 15 27 40 11 8 57.1 14 240 -50 15 23 47 15 31 33 15 22 8 15 33 11 15 26 28 15 28 51 -0.35 151 0 0 15 55 4 11 8 58.3 13 240 -51 15 51 11 15 58 58 15 49 33 16 0 36 15 53 53 15 56 16 -0.35 152 0 0 16 22 33 11 8 59.4 12 240 -51 16 18 39 16 26 26 16 17 1 16 28 5 16 21 21 16 23 44 -0.35 153 0 0 16 50 4 11 9 0.4 11 241 -52 16 46 10 16 53 57 16 44 32 16 55 36 16 48 52 16 51 15 -0.35 154 0 0 17 17 37 11 9 1.3 10 241 -53 17 13 43 17 21 30 17 12 4 17 23 9 17 16 25 17 18 48 -0.35 155 0 0 17 45 10 11 9 2.1 9 241 -54 17 41 17 17 49 4 17 39 38 17 50 43 17 43 59 17 46 22 -0.35 156 0 0 18 12 45 11 9 2.8 8 242 -55 18 8 51 18 16 39 18 7 12 18 18 17 18 11 33 18 13 57 -0.35 157 0 0 18 40 19 11 9 3.5 7 242 -55 18 36 25 18 44 13 18 34 46 18 45 52 18 39 7 18 41 31 -0.35 158 0 0 19 7 52 11 9 4.0 6 242 -56 19 3 58 19 11 46 19 2 19 19 13 24 19 6 40 19 9 4 -0.35 159 0 0 19 35 23 11 9 4.4 5 243 -57 19 31 29 19 39 17 19 29 50 19 40 56 19 34 11 19 36 35 -0.35 160 0 0 20 2 51 11 9 4.8 3 243 -58 19 58 57 20 6 45 19 57 18 20 8 24 20 1 39 20 4 3 -0.35 161 0 0 20 30 16 11 9 5.0 2 243 -58 20 26 22 20 34 10 20 24 43 20 35 49 20 29 4 20 31 28 -0.35 162 0 0 20 57 37 11 9 5.2 1 244 -59 20 53 43 21 1 31 20 52 4 21 3 10 20 56 25 20 58 49 -0.36 163 0 0 21 24 53 11 9 5.2 0 244 -60 21 20 59 21 28 48 21 19 21 21 30 26 21 23 41 21 26 5 -0.40 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: G174331.0-235503 * constellation : Ophiuchus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 43 31.0408 DE: -23 55 03.167 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 43 31.0407 DE: -23 55 03.167 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.600,0.400) * V mag [mag]: 11.6 * B mag [mag]: 14.5 * Diameter [mas]: 2.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (4970) Druyan asteroid class: approx. diameter [km]: 8 approx. diameter ["]: 0.004 distance from Earth [AU]: 2.72500 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 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): 0.010", 0.001", 83.42° remarks: * orbital elements for (4970)Druyan : Mean anomaly = 237.7939505209 deg Arg. of pericenter = 130.4230107870 deg Long. of node = 292.0755517379 deg Inclination = 7.2237750979 deg Eccentricity = 0.1439835374 Semimajor axis = 2.3963450144 AU Perihelion dist = 2.0513107825 AU Mag: H = 13.52, G = 0.15 Epoch of elements : MJD 60589.46183575 TDT (2024 Oct 06.4618) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#432023Apr25,0.49,2024,10,6,11.084065,-0.024086,0.332918,13.951064,0.990928,0.005454,-0.000156,0.000000,0.000000 84.3911,-23.9296,10.74,-5.40,False G174331.0-235503,17.72528914,-23.9175464,14.50,11.55,9.96,2.1,4,,17.75031745,-23.9296221,7.27,8.41,0,0,0 4970,Druyan,18.82,12.240,2.7250,0,0,3.284,3.20,,0.8,0 0,237.6712,2024,10,6,130.4230,292.0756,7.2238,0.14398,2.39635,2.05131,13.51,5.0,0.15 1.211,0.0100,0.0012,83,0.0013,Known errors,0.73,0,-1,-1 20241006_235503,60140.61 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 14:44 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org