IOTA/IOTA-ES occultation update for (1875) Neruda / UCAC4 442-089894 event on 2024 Jul 19, 19:24 UT Visible from Summary ------- On 2024 Jul 19 UT, the 18.632 km diameter asteroid (1875) Neruda will occult a 12.0 mag star in the constellation Aquila for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.42 mag to 16.38 mag (the magnitude of the asteroid) for at most 1.850 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: 97 * date and approx. time of event: 2024 Jul 19, 19:16 - 2024 Jul 19, 19:32 * geocentric midpoint of event [JD]: 2460511.30856683 * magnitude of target star: 11.98 * magnitude drop [mag]: 4.42 * estimated maximum duration [s]: 1.850 * Moon: 97 % sunlit, 28° distance * Sun: 157° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 25 * 1 sigma uncertainty interval [path widths]: +/- 0.39 * 1 sigma uncertainty interval [seconds]: +/- 4.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.032, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.032", 0.001", 83°) * approx speed of asteroid's shadow [km/s]: 10.0511 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 442-089894 by 1875 Neruda on 2024 Jul 19 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 - 37 0 0 -57 38 24 19 32 19.9 0 93 -9 -57 31 45 -57 45 3 -57 26 33 -57 50 16 .... - 36 0 0 -57 39 55 19 32 19.8 1 92 -10 -57 33 17 -57 46 34 -57 28 5 -57 51 48 0.60 - 35 0 0 -57 41 14 19 32 19.7 1 91 -10 -57 34 36 -57 47 52 -57 29 23 -57 53 6 0.70 - 34 0 0 -57 42 19 19 32 19.4 2 90 -11 -57 35 41 -57 48 58 -57 30 29 -57 54 12 0.74 - 33 0 0 -57 43 12 19 32 19.1 2 89 -11 -57 36 34 -57 49 51 -57 31 22 -57 55 5 0.77 - 32 0 0 -57 43 52 19 32 18.8 3 88 -12 -57 37 14 -57 50 31 -57 32 2 -57 55 44 0.78 - 31 0 0 -57 44 19 19 32 18.3 3 88 -12 -57 37 41 -57 50 58 -57 32 29 -57 56 11 0.80 - 30 0 0 -57 44 33 19 32 17.8 4 87 -13 -57 37 55 -57 51 12 -57 32 43 -57 56 26 0.80 - 29 0 0 -57 44 35 19 32 17.2 5 86 -13 -57 37 57 -57 51 14 -57 32 45 -57 56 27 0.81 - 28 0 0 -57 44 23 19 32 16.6 5 85 -14 -57 37 45 -57 51 2 -57 32 33 -57 56 16 0.82 - 27 0 0 -57 43 59 19 32 15.8 6 84 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41 0.88 132 0 0 -25 28 35 19 16 52.0 16 276 -35 -25 21 53 -25 35 18 -25 16 37 -25 40 35 0.88 133 0 0 -25 20 49 19 16 48.4 15 275 -34 -25 14 7 -25 27 31 -25 8 51 -25 32 48 0.88 134 0 0 -25 13 22 19 16 45.1 14 275 -34 -25 6 40 -25 20 4 -25 1 25 -25 25 21 0.88 135 0 0 -25 6 15 19 16 41.9 13 274 -33 -24 59 34 -25 12 57 -24 54 19 -25 18 13 0.88 136 0 0 -24 59 28 19 16 39.0 12 274 -32 -24 52 47 -25 6 10 -24 47 32 -25 11 26 0.89 137 0 0 -24 53 1 19 16 36.2 12 274 -31 -24 46 20 -24 59 42 -24 41 5 -25 4 58 0.89 138 0 0 -24 46 54 19 16 33.7 11 273 -30 -24 40 13 -24 53 35 -24 34 59 -24 58 51 0.89 139 0 0 -24 41 7 19 16 31.3 10 273 -29 -24 34 27 -24 47 49 -24 29 13 -24 53 4 0.90 140 0 0 -24 35 41 19 16 29.1 9 272 -28 -24 29 1 -24 42 22 -24 23 47 -24 47 38 0.90 141 0 0 -24 30 36 19 16 27.2 8 272 -27 -24 23 56 -24 37 17 -24 18 42 -24 42 32 0.91 142 0 0 -24 25 52 19 16 25.4 7 271 -26 -24 19 12 -24 32 33 -24 13 58 -24 37 48 0.91 143 0 0 -24 21 29 19 16 23.9 6 271 -25 -24 14 49 -24 28 9 -24 9 35 -24 33 24 0.92 144 0 0 -24 17 26 19 16 22.6 5 271 -25 -24 10 46 -24 24 7 -24 5 33 -24 29 22 0.93 145 0 0 -24 13 45 19 16 21.4 4 270 -24 -24 7 6 -24 20 26 -24 1 52 -24 25 40 0.95 146 0 0 -24 10 26 19 16 20.5 3 270 -23 -24 3 46 -24 17 6 -23 58 33 -24 22 21 0.98 147 0 0 -24 7 27 19 16 19.8 3 269 -22 -24 0 48 -24 14 8 -23 55 35 -24 19 22 1.02 148 0 0 -24 4 51 19 16 19.3 2 269 -21 -23 58 12 -24 11 31 -23 52 58 -24 16 46 1.10 149 0 0 -24 2 36 19 16 19.0 1 269 -20 -23 55 57 -24 9 16 -23 50 44 -24 14 31 1.40 Uncertainty in time = +/- 4 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: UCAC4 442-089894 * constellation : Aquila * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 03 41.7646 DE: -01 42 16.824 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 03 41.7646 DE: -01 42 16.823 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 12.0 * B mag [mag]: 12.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1875) Neruda asteroid class: approx. diameter [km]: 19 approx. diameter ["]: 0.015 distance from Earth [AU]: 1.76440 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#47 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): 0.032", 0.001", 83.309° remarks: * orbital elements for (1875)Neruda : Mean anomaly = 328.6887937309 deg Arg. of pericenter = 140.0014072940 deg Long. of node = 193.7095873495 deg Inclination = 13.3765203405 deg Eccentricity = 0.1629588057 Semimajor axis = 3.1372588771 AU Perihelion dist = 2.6260149174 AU Mag: H = 12.39, G = 0.15 Epoch of elements : MJD 60510.80856737 TDT (2024 Jul 19.8086) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#472023Apr24,1.85,2024,7,19,19.405604,0.187678,-0.623289,-5.432256,-1.635600,0.001208,-0.001787,0.000001,0.000000 57.0847,-1.6681,-109.48,20.64,False UCAC4 442-089894,19.06160129,-1.7046733,12.39,11.98,11.76,0.0,0,,19.08315644,-1.6681359,4.42,4.20,0,0,0 1875,Neruda,16.38,18.632,1.7644,0,0,-1.805,-8.16,,1.6,0 0,328.5454,2024,7,19,140.0014,193.7096,13.3765,0.16296,3.13726,2.62601,12.39,5.0,0.15 1.393,0.0320,0.0012,83,0.0057,Known errors,0.95,0,-1,-1 20240719_089894,60140.21 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 05:01 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org