IOTA/IOTA-ES occultation update for (399) Persephone / UCAC4 244-095461 event on 2024 Jun 17, 21:14 UT Visible from Summary ------- On 2024 Jun 17 UT, the 45.96 km diameter asteroid (399) Persephone will occult a 11.9 mag star in the constellation Scorpius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 1.79 mag to 13.45 mag (the magnitude of the asteroid) for at most 4.180 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 Jun 17, 21:05 - 2024 Jun 17, 21:24 * geocentric midpoint of event [JD]: 2460479.38533779 * magnitude of target star: 11.89 * magnitude drop [mag]: 1.79 * estimated maximum duration [s]: 4.180 * Moon: 82 % sunlit, 37° distance * Sun: 155° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 50 * 1 sigma uncertainty interval [path widths]: +/- 0.17 * 1 sigma uncertainty interval [seconds]: +/- 3.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.023, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.023", 0.003", 100°) * approx speed of asteroid's shadow [km/s]: 10.9981 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 244-095461 by 399 Persephone on 2024 Jun 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 - 72 0 0 .. .. .... .. .. .. .. .. .. .. .. .. - 0 50 29 .. .. .. - 0 56 35 .... - 71 0 0 - 1 26 20 21 23 49.4 1 131 18 - 1 8 26 - 1 44 16 - 1 2 20 - 1 50 24 .... - 70 0 0 - 2 20 53 21 23 48.9 3 131 17 - 2 2 51 - 2 38 57 - 1 56 42 - 2 45 8 0.36 - 69 0 0 - 3 16 18 21 23 48.0 4 131 15 - 2 58 8 - 3 34 31 - 2 51 57 - 3 40 44 0.37 - 68 0 0 - 4 12 34 21 23 46.7 5 131 14 - 3 54 17 - 4 30 55 - 3 48 2 - 4 37 11 0.37 - 67 0 0 - 5 9 39 21 23 45.1 7 131 13 - 4 51 14 - 5 28 8 - 4 44 57 - 5 34 27 0.37 - 66 0 0 - 6 7 32 21 23 43.1 8 131 12 - 5 48 58 - 6 26 8 - 5 42 39 - 6 32 30 0.37 - 65 0 0 - 7 6 9 21 23 40.7 10 131 10 - 6 47 27 - 7 24 53 - 6 41 5 - 7 31 18 0.37 - 64 0 0 - 8 5 28 21 23 38.0 11 131 9 - 7 46 39 - 8 24 20 - 7 40 14 - 8 30 48 0.37 - 63 0 0 - 9 5 27 21 23 34.9 12 131 8 - 8 46 30 - 9 24 27 - 8 40 3 - 9 30 57 0.38 - 62 0 0 -10 6 3 21 23 31.4 14 130 6 - 9 46 59 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-16 -43 11 38 -43 52 26 -43 4 42 -43 59 26 0.42 134 0 0 -42 40 48 21 6 17.0 14 226 -15 -42 20 20 -43 1 20 -42 13 22 -43 8 22 0.42 135 0 0 -41 48 27 21 6 14.0 13 226 -14 -41 27 54 -42 9 5 -41 20 55 -42 16 9 0.42 136 0 0 -40 55 0 21 6 11.3 12 225 -13 -40 34 22 -41 15 43 -40 27 21 -41 22 48 0.42 137 0 0 -40 0 27 21 6 8.7 11 224 -12 -39 39 45 -40 21 14 -39 32 41 -40 28 21 0.43 138 0 0 -39 4 49 21 6 6.4 10 224 -11 -38 44 2 -39 25 40 -38 36 58 -39 32 49 0.43 139 0 0 -38 8 8 21 6 4.3 8 223 -10 -37 47 18 -38 29 3 -37 40 12 -38 36 13 0.44 140 0 0 -37 10 26 21 6 2.4 7 222 -9 -36 49 32 -37 31 24 -36 42 25 -37 38 35 0.45 141 0 0 -36 11 44 21 6 0.8 6 222 -8 -35 50 48 -36 32 45 -35 43 40 -36 39 57 0.46 142 0 0 -35 12 5 21 5 59.5 5 221 -7 -34 51 7 -35 33 9 -34 43 58 -35 40 21 0.48 143 0 0 -34 11 32 21 5 58.5 3 221 -6 -33 50 32 -34 32 37 -33 43 23 -34 39 50 0.53 144 0 0 -33 10 8 21 5 57.9 2 220 -5 -32 49 6 -33 31 14 -32 41 56 -33 38 27 0.63 145 0 0 -32 7 54 21 5 57.5 1 219 -3 -31 46 52 -32 29 1 -31 39 42 -32 36 15 1.19 Uncertainty in time = +/- 3 secs Prediction of 2023 Jul 14.4 Data for the target star ------------------------ * name: UCAC4 244-095461 * constellation : Scorpius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 16 21 56.7178 DE: -41 15 45.134 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 16 21 56.7178 DE: -41 15 45.135 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.9 * B mag [mag]: 12.6 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (399) Persephone asteroid class: approx. diameter [km]: 46 approx. diameter ["]: 0.031 distance from Earth [AU]: 2.03330 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#59 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): 0.023", 0.003", 100.4° remarks: * orbital elements for (399)Persephone : Mean anomaly = 69.1124498397 deg Arg. of pericenter = 192.4840297259 deg Long. of node = 346.1867794735 deg Inclination = 13.1121108906 deg Eccentricity = 0.0767367487 Semimajor axis = 3.0519611832 AU Perihelion dist = 2.8177636047 AU Mag: H = 8.97, G = 0.15 Epoch of elements : MJD 60478.88533804 TDT (2024 Jun 17.8853) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#592023Apr24,4.18,2024,6,17,21.248107,-0.140727,-0.353381,-5.766724,2.297706,0.001859,0.001488,0.000001,0.000000 20.5789,-41.3220,-138.43,23.41,False UCAC4 244-095461,16.36575496,-41.2625371,12.57,11.89,11.52,0.0,0,,16.39423447,-41.3219619,1.79,1.73,0,0,0 399,Persephone,13.45,45.960,2.0333,0,0,-2.213,9.94,,2.4,0 0,68.9488,2024,6,17,192.4840,346.1868,13.1121,0.07674,3.05196,2.81776,8.96,5.0,0.15 1.171,0.0233,0.0028,100,0.0053,Known errors,1.75,0,-1,-1 20240617_095461,60139.39 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 14, 09:21 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org