IOTA/IOTA-ES occultation update for (151) Abundantia / UCAC4 288-171741 event on 2024 Jul 25, 00:05 UT Visible from Summary ------- On 2024 Jul 25 UT, the 40.851 km diameter asteroid (151) Abundantia will occult a 11.8 mag star in the constellation Sagittarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 1.64 mag to 13.13 mag (the magnitude of the asteroid) for at most 5.400 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 Jul 24, 23:51 - 2024 Jul 25, 00:19 * geocentric midpoint of event [JD]: 2460516.50370150 * magnitude of target star: 11.76 * magnitude drop [mag]: 1.64 * estimated maximum duration [s]: 5.400 * Moon: 83 % sunlit, 78° distance * Sun: 150° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 41 * 1 sigma uncertainty interval [path widths]: +/- 0.11 * 1 sigma uncertainty interval [seconds]: +/- 2.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.015, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.015", 0.004", 95°) * approx speed of asteroid's shadow [km/s]: 7.5617 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 288-171741 by 151 Abundantia on 2024 Jul 25 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 -125 0 0 - 2 3 43 0 19 16.1 0 122 29 - 1 50 31 - 2 16 56 - 1 47 36 - 2 19 51 .... -124 0 0 - 2 42 13 0 19 15.8 2 122 28 - 2 29 0 - 2 55 26 - 2 26 5 - 2 58 22 0.18 -123 0 0 - 3 20 48 0 19 15.2 3 122 27 - 3 7 35 - 3 34 2 - 3 4 39 - 3 36 57 0.14 -122 0 0 - 3 59 26 0 19 14.2 4 122 25 - 3 46 13 - 4 12 41 - 3 43 17 - 4 15 36 0.13 -121 0 0 - 4 38 7 0 19 12.8 5 122 24 - 4 24 53 - 4 51 22 - 4 21 58 - 4 54 18 0.12 -120 0 0 - 5 16 49 0 19 11.1 6 122 23 - 5 3 35 - 5 30 4 - 5 0 40 - 5 33 0 0.12 -119 0 0 - 5 55 31 0 19 9.0 7 122 22 - 5 42 17 - 6 8 46 - 5 39 21 - 6 11 42 0.11 -118 0 0 - 6 34 12 0 19 6.6 9 122 21 - 6 20 57 - 6 47 27 - 6 18 2 - 6 50 23 0.11 -117 0 0 - 7 12 50 0 19 3.8 10 122 20 - 6 59 35 - 7 26 5 - 6 56 40 - 7 29 1 0.11 -116 0 0 - 7 51 24 0 19 0.7 11 122 19 - 7 38 9 - 8 4 39 - 7 35 14 - 8 7 35 0.11 -115 0 0 - 8 29 53 0 18 57.2 12 122 17 - 8 16 38 - 8 43 8 - 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21 242 -46 -21 55 36 -22 21 19 -21 52 46 -22 24 9 0.12 52 0 0 -21 35 56 23 52 15.4 - 20 242 -45 -21 23 3 -21 48 50 -21 20 13 -21 51 41 0.12 53 0 0 -21 2 59 23 52 10.1 - 19 242 -44 -20 50 4 -21 15 54 -20 47 13 -21 18 46 0.12 54 0 0 -20 29 36 23 52 5.0 - 18 241 -43 -20 16 39 -20 42 33 -20 13 48 -20 45 25 0.12 55 0 0 -19 55 48 23 52 0.3 - 17 241 -42 -19 42 49 -20 8 47 -19 39 57 -20 11 39 0.12 56 0 0 -19 21 35 23 51 55.7 - 16 241 -41 -19 8 34 -19 34 35 -19 5 42 -19 37 28 0.12 57 0 0 -18 46 57 23 51 51.5 - 15 240 -40 -18 33 55 -18 59 59 -18 31 2 -19 2 52 0.12 58 0 0 -18 11 56 23 51 47.5 - 14 240 -39 -17 58 53 -18 25 0 -17 56 0 -18 27 53 0.12 59 0 0 -17 36 32 23 51 43.8 - 12 240 -38 -17 23 27 -17 49 38 -17 20 34 -17 52 32 0.12 60 0 0 -17 0 47 23 51 40.4 - 11 239 -37 -16 47 40 -17 13 54 -16 44 46 -17 16 48 0.12 61 0 0 -16 24 39 23 51 37.3 - 10 239 -36 -16 11 31 -16 37 48 -16 8 37 -16 40 42 0.12 62 0 0 -15 48 12 23 51 34.5 - 9 239 -35 -15 35 2 -16 1 22 -15 32 8 -16 4 16 0.13 63 0 0 -15 11 25 23 51 32.0 - 8 238 -34 -14 58 14 -15 24 36 -14 55 19 -15 27 31 0.13 64 0 0 -14 34 19 23 51 29.8 - 7 238 -32 -14 21 7 -14 47 31 -14 18 12 -14 50 26 0.13 65 0 0 -13 56 55 23 51 28.0 - 6 238 -31 -13 43 42 -14 10 8 -13 40 47 -14 13 4 0.14 66 0 0 -13 19 15 23 51 26.4 - 4 238 -30 -13 6 0 -13 32 29 -13 3 5 -13 35 25 0.15 67 0 0 -12 41 18 23 51 25.3 - 3 237 -29 -12 28 3 -12 54 34 -12 25 8 -12 57 30 0.17 68 0 0 -12 3 8 23 51 24.4 - 2 237 -28 -11 49 52 -12 16 24 -11 46 56 -12 19 20 0.21 69 0 0 -11 24 43 23 51 23.9 - 1 237 -27 -11 11 27 -11 38 1 -11 8 31 -11 40 57 0.33 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: UCAC4 288-171741 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 14 07.3142 DE: -32 27 25.013 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 14 07.3141 DE: -32 27 25.014 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.8 * B mag [mag]: 12.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (151) Abundantia asteroid class: approx. diameter [km]: 41 approx. diameter ["]: 0.033 distance from Earth [AU]: 1.69850 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#62 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", 0.004", 95.127° remarks: * orbital elements for (151)Abundantia : Mean anomaly = 109.0564091511 deg Arg. of pericenter = 132.4906438916 deg Long. of node = 38.7343788008 deg Inclination = 6.4313589344 deg Eccentricity = 0.0357614178 Semimajor axis = 2.5918761090 AU Perihelion dist = 2.4991869445 AU Mag: H = 9.20, G = 0.15 Epoch of elements : MJD 60516.00370154 TDT (2024 Jul 25.0037) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#622023Apr24,5.40,2024,7,25,0.088836,-0.012097,-0.130307,-4.249798,0.394186,0.002626,0.000829,0.000001,0.000000 -30.5944,-32.4508,-179.69,19.59,False UCAC4 288-171741,18.23536505,-32.4569482,12.42,11.76,11.40,0.0,0,,18.26248678,-32.4508153,1.64,1.57,0,0,0 151,Abundantia,13.13,40.851,1.6985,0,0,-1.737,2.04,,2.0,0 0,108.8193,2024,7,24,132.4906,38.7344,6.4314,0.03576,2.59188,2.49919,9.19,5.0,0.15 1.110,0.0153,0.0037,95,0.0037,Known errors,0.68,0,-1,-1 20240725_171741,60140.22 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 05:14 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org