IOTA/IOTA-ES occultation update for (4377) Koremori / G164458.3-222349 event on 2024 Mar 01, 14:57 UT Visible from Summary ------- On 2024 Mar 01 UT, the 9.54316375798239 km diameter asteroid (4377) Koremori will occult a 11.5 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 6.54 mag to 18.06 mag (the magnitude of the asteroid) for at most 0.540 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: 96 * date and approx. time of event: 2024 Mar 01, 14:53 - 2024 Mar 01, 15:01 * geocentric midpoint of event [JD]: 2460371.12329954 * magnitude of target star: 11.52 * magnitude drop [mag]: 6.54 * estimated maximum duration [s]: 0.540 * Moon: 70 % sunlit, 25° distance * Sun: 88° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 15 * 1 sigma uncertainty interval [path widths]: +/- 0.40 * 1 sigma uncertainty interval [seconds]: +/- 1.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.015, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.015", 0.003", 94°) * approx speed of asteroid's shadow [km/s]: 19.4984 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of G164458.3-222349 by 4377 Koremori on 2024 Mar 1 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 121 0 0 -36 38 18 14 53 39.4 0 118 -43 -36 42 53 -36 33 43 -36 46 35 -36 30 2 - 36 41 58 - 36 34 38 .... 122 0 0 -37 4 37 14 53 39.5 1 117 -43 -37 9 13 -37 0 1 -37 12 56 -36 56 19 - 37 8 17 - 37 0 56 0.80 123 0 0 -37 31 7 14 53 39.7 2 117 -43 -37 35 43 -37 26 30 -37 39 27 -37 22 48 - 37 34 48 - 37 27 26 0.88 124 0 0 -37 57 46 14 53 40.1 3 116 -43 -38 2 24 -37 53 9 -38 6 8 -37 49 26 - 38 1 28 - 37 54 5 0.92 125 0 0 -38 24 35 14 53 40.5 4 116 -42 -38 29 13 -38 19 57 -38 32 58 -38 16 13 - 38 28 18 - 38 20 53 0.93 126 0 0 -38 51 32 14 53 41.1 5 115 -42 -38 56 11 -38 46 53 -38 59 56 -38 43 9 - 38 55 15 - 38 47 49 0.95 127 0 0 -39 18 36 14 53 41.8 6 114 -42 -39 23 16 -39 13 57 -39 27 2 -39 10 12 - 39 22 20 - 39 14 53 0.95 128 0 0 -39 45 46 14 53 42.6 7 114 -42 -39 50 27 -39 41 6 -39 54 14 -39 37 21 - 39 49 31 - 39 42 2 0.96 129 0 0 -40 13 2 14 53 43.5 8 113 -42 -40 17 44 -40 8 22 -40 21 31 -40 4 36 - 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53 21 21 - 53 13 43 1.02 - 40 0 0 -52 54 15 15 1 9.0 16 253 44 -52 59 2 -52 49 29 -53 2 54 -52 45 38 - 52 58 5 - 52 50 26 1.02 - 39 0 0 -52 30 41 15 1 10.6 15 252 45 -52 35 28 -52 25 54 -52 39 20 -52 22 3 - 52 34 31 - 52 26 51 1.03 - 38 0 0 -52 6 49 15 1 12.1 14 252 45 -52 11 37 -52 2 2 -52 15 29 -51 58 11 - 52 10 39 - 52 3 0 1.03 - 37 0 0 -51 42 42 15 1 13.5 13 251 45 -51 47 29 -51 37 54 -51 51 22 -51 34 3 - 51 46 32 - 51 38 52 1.03 - 36 0 0 -51 18 18 15 1 14.8 13 250 46 -51 23 6 -51 13 30 -51 26 58 -51 9 39 - 51 22 8 - 51 14 28 1.04 - 35 0 0 -50 53 39 15 1 16.1 12 249 46 -50 58 27 -50 48 51 -51 2 20 -50 44 59 - 50 57 29 - 50 49 49 1.04 - 34 0 0 -50 28 45 15 1 17.4 11 248 46 -50 33 33 -50 23 57 -50 37 26 -50 20 5 - 50 32 35 - 50 24 55 1.04 - 33 0 0 -50 3 37 15 1 18.5 10 248 47 -50 8 25 -49 58 49 -50 12 18 -49 54 57 - 50 7 27 - 49 59 46 1.05 - 32 0 0 -49 38 15 15 1 19.6 10 247 47 -49 43 3 -49 33 27 -49 46 56 -49 29 35 - 49 42 5 - 49 34 25 1.05 - 31 0 0 -49 12 40 15 1 20.7 9 246 47 -49 17 28 -49 7 52 -49 21 21 -49 4 0 - 49 16 31 - 49 8 50 1.06 - 30 0 0 -48 46 53 15 1 21.6 8 245 47 -48 51 41 -48 42 5 -48 55 34 -48 38 13 - 48 50 44 - 48 43 3 1.07 - 29 0 0 -48 20 54 15 1 22.5 7 244 47 -48 25 43 -48 16 6 -48 29 35 -48 12 15 - 48 24 45 - 48 17 4 1.08 - 28 0 0 -47 54 45 15 1 23.3 7 244 48 -47 59 33 -47 49 57 -48 3 26 -47 46 5 - 47 58 35 - 47 50 55 1.09 - 27 0 0 -47 28 25 15 1 24.0 6 243 48 -47 33 13 -47 23 38 -47 37 6 -47 19 46 - 47 32 15 - 47 24 35 1.10 - 26 0 0 -47 1 56 15 1 24.6 5 242 48 -47 6 44 -46 57 9 -47 10 36 -46 53 17 - 47 5 46 - 46 58 6 1.12 - 25 0 0 -46 35 18 15 1 25.1 4 241 48 -46 40 6 -46 30 31 -46 43 58 -46 26 40 - 46 39 8 - 46 31 29 1.15 - 24 0 0 -46 8 33 15 1 25.6 3 241 48 -46 13 20 -46 3 46 -46 17 12 -45 59 55 - 46 12 23 - 46 4 44 1.18 - 23 0 0 -45 41 41 15 1 25.9 3 240 48 -45 46 28 -45 36 54 -45 50 20 -45 33 4 - 45 45 30 - 45 37 52 1.25 - 22 0 0 -45 14 42 15 1 26.2 2 239 48 -45 19 29 -45 9 56 -45 23 20 -45 6 6 - 45 18 32 - 45 10 54 1.38 - 21 0 0 -44 47 39 15 1 26.3 1 239 48 -44 52 25 -44 42 53 -44 56 16 -44 39 3 - 44 51 28 - 44 43 50 1.78 - 20 0 0 .. .. .... .. .. .. .. .. .. -44 25 17 .. .. .. -44 29 7 .. .. .. - 44 24 19 ... .. .. .... Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 13.9 Data for the target star ------------------------ * name: G164458.3-222349 * constellation : Ophiuchus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 16 44 58.2656 DE: -22 23 49.308 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 16 44 58.2656 DE: -22 23 49.308 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.500,0.300) * V mag [mag]: 11.5 * B mag [mag]: 13.8 * Diameter [mas]: 0.70 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (4377) Koremori asteroid class: approx. diameter [km]: 10 approx. diameter ["]: 0.007 distance from Earth [AU]: 2.00090 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#51 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): 0.015", 0.003", 93.7° remarks: * orbital elements for (4377)Koremori : Mean anomaly = 19.8403551689 deg Arg. of pericenter = 335.3862965182 deg Long. of node = 227.6168645317 deg Inclination = 2.6054497127 deg Eccentricity = 0.0755269390 Semimajor axis = 2.3762936032 AU Perihelion dist = 2.1968194211 AU Mag: H = 13.63, G = 0.15 Epoch of elements : MJD 60370.62329946 TDT (2024 Mar 01.6233) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#512023Apr24,0.54,2024,3,1,14.959189,-0.054886,-0.696126,10.971035,-0.869852,-0.005522,0.000700,0.000000,0.000000 -132.6895,-22.4421,-41.34,-7.24,False G164458.3-222349,16.74951820,-22.3970300,13.82,11.52,10.28,0.7,4,,16.77353737,-22.4420973,6.54,7.33,0,0,1 4377,Koremori,18.06,10.559,2.0009,0,0,3.478,-3.82,,1.0,0 0,19.6726,2024,3,1,335.3863,227.6169,2.6054,0.07553,2.37629,2.19682,13.63,5.0,0.15 1.403,0.0153,0.0029,94,0.0029,Known errors,1.09,0,-1,-1 20240301_222349,60138.90 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 13, 21:29 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org