IOTA/IOTA-ES occultation update for (152830) Dinkinesh / UCAC4 320-113412 event on 2024 May 29, 18:45 UT Visible from Summary ------- On 2024 May 29 UT, the 1.05980368882856 km diameter asteroid (152830) Dinkinesh will occult a 13.6 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 6.98 mag to 20.55 mag (the magnitude of the asteroid) for at most 0.160 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: 9 * date and approx. time of event: 2024 May 29, 18:35 - 2024 May 29, 18:55 * geocentric midpoint of event [JD]: 2460460.28140675 * magnitude of target star: 13.57 * magnitude drop [mag]: 6.98 * estimated maximum duration [s]: 0.160 * Moon: 60 % sunlit, 65° distance * Sun: 167° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 2 * 1 sigma uncertainty interval [path widths]: +/- 7.65 * 1 sigma uncertainty interval [seconds]: +/- 5.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.053, +/- 0.013) * 1 sigma uncertainty ellipse (major, minor, PA): (0.053", 0.012", 95°) * approx speed of asteroid's shadow [km/s]: 10.7139 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 320-113412 by 152830 Dinkinesh on 2024 May 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 - 5 0 0 - 8 29 6 18 55 0.3 0 116 -12 - 8 28 35 - 8 29 37 - 8 20 26 - 8 37 46 - 8 28 57 - 8 29 15 .... - 4 0 0 - 8 58 43 18 55 0.1 1 116 -13 - 8 58 12 - 8 59 14 - 8 50 3 - 9 7 23 - 8 58 33 - 8 58 52 0.21 - 3 0 0 - 9 28 18 18 54 59.8 2 116 -14 - 9 27 47 - 9 28 49 - 9 19 38 - 9 36 58 - 9 28 8 - 9 28 27 0.18 - 2 0 0 - 9 57 50 18 54 59.2 3 116 -15 - 9 57 19 - 9 58 21 - 9 49 10 -10 6 31 - 9 57 41 - 9 58 0 0.17 - 1 0 0 -10 27 20 18 54 58.4 5 116 -16 -10 26 49 -10 27 51 -10 18 40 -10 36 0 - 10 27 11 - 10 27 29 0.17 - 0 0 0 -10 56 46 18 54 57.4 6 116 -17 -10 56 15 -10 57 17 -10 48 6 -11 5 26 - 10 56 37 - 10 56 55 0.16 1 0 0 -11 26 7 18 54 56.1 7 115 -18 -11 25 36 -11 26 38 -11 17 27 -11 34 47 - 11 25 58 - 11 26 17 0.16 2 0 0 -11 55 23 18 54 54.7 8 115 -19 -11 54 52 -11 55 54 -11 46 44 -12 4 3 - 11 55 14 - 11 55 33 0.16 3 0 0 -12 24 33 18 54 53.0 9 115 -20 -12 24 2 -12 25 4 -12 15 54 -12 33 13 - 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20 57 51 - 20 58 9 0.16 164 0 0 -20 32 40 18 36 27.7 26 250 -13 -20 32 10 -20 33 11 -20 24 9 -20 41 11 - 20 32 31 - 20 32 50 0.16 165 0 0 -20 7 4 18 36 23.2 25 250 -12 -20 6 33 -20 7 34 -19 58 32 -20 15 36 - 20 6 55 - 20 7 13 0.16 166 0 0 -19 41 11 18 36 18.7 24 249 -11 -19 40 40 -19 41 41 -19 32 38 -19 49 43 - 19 41 1 - 19 41 20 0.16 167 0 0 -19 15 1 18 36 14.4 23 249 -10 -19 14 31 -19 15 32 -19 6 28 -19 23 34 - 19 14 52 - 19 15 10 0.16 168 0 0 -18 48 36 18 36 10.3 22 249 -9 -18 48 5 -18 49 7 -18 40 2 -18 57 10 - 18 48 27 - 18 48 45 0.17 169 0 0 -18 21 55 18 36 6.3 21 248 -8 -18 21 25 -18 22 26 -18 13 21 -18 30 30 - 18 21 46 - 18 22 5 0.17 170 0 0 -17 55 0 18 36 2.5 20 248 -7 -17 54 29 -17 55 31 -17 46 25 -18 3 35 - 17 54 51 - 17 55 9 0.17 171 0 0 -17 27 50 18 35 58.9 19 248 -6 -17 27 20 -17 28 21 -17 19 15 -17 36 26 - 17 27 41 - 17 28 0 0.17 172 0 0 -17 0 27 18 35 55.5 18 247 -5 -16 59 56 -17 0 58 -16 51 51 -17 9 3 - 17 0 18 - 17 0 36 0.17 173 0 0 -16 32 51 18 35 52.2 17 247 -4 -16 32 20 -16 33 21 -16 24 14 -16 41 27 - 16 32 41 - 16 33 0 0.17 174 0 0 -16 5 1 18 35 49.1 16 247 -3 -16 4 31 -16 5 32 -15 56 24 -16 13 38 - 16 4 52 - 16 5 11 0.17 175 0 0 -15 37 0 18 35 46.2 15 246 -2 -15 36 29 -15 37 31 -15 28 23 -15 45 38 - 15 36 51 - 15 37 9 0.17 176 0 0 -15 8 47 18 35 43.5 13 246 -1 -15 8 17 -15 9 18 -15 0 10 -15 17 25 - 15 8 38 - 15 8 57 0.17 177 0 0 -14 40 24 18 35 41.0 12 246 1 -14 39 53 -14 40 55 -14 31 46 -14 49 2 - 14 40 15 - 14 40 33 0.17 178 0 0 -14 11 51 18 35 38.6 11 246 2 -14 11 20 -14 12 21 -14 3 12 -14 20 29 - 14 11 41 - 14 12 0 0.17 179 0 0 -13 43 7 18 35 36.5 10 245 3 -13 42 37 -13 43 38 -13 34 29 -13 51 47 - 13 42 58 - 13 43 17 0.18 180 0 0 -13 14 16 18 35 34.6 9 245 4 -13 13 45 -13 14 47 -13 5 37 -13 22 55 - 13 14 6 - 13 14 25 0.18 -179 0 0 -12 45 16 18 35 32.9 8 245 5 -12 44 45 -12 45 47 -12 36 36 -12 53 55 - 12 45 6 - 12 45 25 0.18 -178 0 0 -12 16 9 18 35 31.4 7 245 6 -12 15 38 -12 16 39 -12 7 29 -12 24 48 - 12 15 59 - 12 16 18 0.19 -177 0 0 -11 46 55 18 35 30.1 6 245 7 -11 46 24 -11 47 26 -11 38 15 -11 55 35 - 11 46 45 - 11 47 4 0.19 -176 0 0 -11 17 35 18 35 29.0 5 244 8 -11 17 4 -11 18 6 -11 8 55 -11 26 15 - 11 17 25 - 11 17 44 0.20 -175 0 0 -10 48 10 18 35 28.1 4 244 9 -10 47 39 -10 48 41 -10 39 30 -10 56 50 - 10 48 0 - 10 48 19 0.22 -174 0 0 -10 18 40 18 35 27.5 3 244 10 -10 18 9 -10 19 11 -10 10 0 -10 27 21 - 10 18 31 - 10 18 50 0.24 -173 0 0 - 9 49 7 18 35 27.0 2 244 11 - 9 48 37 - 9 49 38 - 9 40 27 - 9 57 48 - 9 48 58 - 9 49 17 0.31 -172 0 0 - 9 19 32 18 35 26.8 0 244 12 - 9 19 1 - 9 20 3 - 9 10 51 - 9 28 12 - 9 19 22 - 9 19 41 0.69 Uncertainty in time = +/- 5 secs Prediction of 2023 Jul 14.4 Data for the target star ------------------------ * name: UCAC4 320-113412 * constellation : Ophiuchus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 20 44.8638 DE: -26 02 13.824 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 20 44.8638 DE: -26 02 13.824 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.500,0.300) * V mag [mag]: 13.6 * B mag [mag]: 16.3 * Diameter [mas]: 0.60 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (152830) Dinkinesh asteroid class: approx. diameter [km]: 1 approx. diameter ["]: 0.001 distance from Earth [AU]: 1.43210 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#23 date of fit: 2023 Mar 16 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): 0.053", 0.012", 95° remarks: * orbital elements for (152830)Dinkinesh : Mean anomaly = 164.7778365321 deg Arg. of pericenter = 66.8349044252 deg Long. of node = 21.3782195595 deg Inclination = 2.0932536946 deg Eccentricity = 0.1121925662 Semimajor axis = 2.1916713410 AU Perihelion dist = 1.9457821089 AU Mag: H = 17.40, G = 0.15 Epoch of elements : MJD 60459.78140700 TDT (2024 May 29.7814) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#232023Mar16,0.16,2024,5,29,18.753762,-0.001102,-0.168794,-6.047104,0.040389,-0.001203,0.000349,0.000001,0.000000 91.4801,-26.0624,-101.92,21.78,False UCAC4 320-113412,17.34579551,-26.0371734,16.28,13.57,12.11,0.6,0,,17.37131369,-26.0624350,6.98,7.99,0,0,0 152830,Dinkinesh,20.55,1.683,1.4321,0,0,-2.756,0.25,,0.1,0 0,164.5405,2024,5,29,66.8349,21.3782,2.0933,0.11219,2.19167,1.94578,17.40,5.0,0.15 8.907,0.0530,0.0117,95,0.0124,Known errors,1.11,0,-1,-1 20240529_113412,60139.36 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 14, 08:40 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org