IOTA/IOTA-ES occultation update for (151) Abundantia / UCAC4 289-156996 event on 2024 Aug 01, 00:47 UT Visible from Summary ------- On 2024 Aug 01 UT, the 40.849 km diameter asteroid (151) Abundantia will occult a 12.0 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 1.60 mag to 13.29 mag (the magnitude of the asteroid) for at most 7.180 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 Aug 01, 00:28 - 2024 Aug 01, 01:06 * geocentric midpoint of event [JD]: 2460523.53322796 * magnitude of target star: 11.97 * magnitude drop [mag]: 1.60 * estimated maximum duration [s]: 7.180 * Moon: 12 % sunlit, 175° distance * Sun: 142° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 41 * 1 sigma uncertainty interval [path widths]: +/- 0.13 * 1 sigma uncertainty interval [seconds]: +/- 3.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.015, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.015", 0.004", 96°) * approx speed of asteroid's shadow [km/s]: 5.6860 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 289-156996 by 151 Abundantia on 2024 Aug 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 -138 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 9 13 20 .... -137 0 0 8 51 17 1 6 32.4 1 123 33 9 4 29 8 38 5 9 7 47 8 34 47 .... -136 0 0 8 12 31 1 6 31.8 2 123 32 8 25 44 7 59 17 8 29 2 7 55 59 0.06 -135 0 0 7 33 30 1 6 30.6 3 123 31 7 46 45 7 20 16 7 50 3 7 16 57 0.03 -134 0 0 6 54 17 1 6 29.0 5 123 30 7 7 33 6 41 2 7 10 51 6 37 43 0.02 -133 0 0 6 14 53 1 6 27.0 6 123 28 6 28 9 6 1 37 6 31 28 5 58 18 0.01 -132 0 0 5 35 19 1 6 24.4 7 124 27 5 48 35 5 22 2 5 51 54 5 18 43 0.00 -131 0 0 4 55 35 1 6 21.4 8 124 26 5 8 53 4 42 18 5 12 12 4 38 59 0.00 -130 0 0 4 15 45 1 6 17.9 9 124 25 4 29 3 4 2 27 4 32 22 3 59 8 0.00 -129 0 0 3 35 49 1 6 13.9 11 124 24 3 49 7 3 22 30 3 52 26 3 19 11 -0.01 -128 0 0 2 55 47 1 6 9.4 12 124 23 3 9 6 2 42 29 3 12 25 2 39 10 -0.01 -127 0 0 2 15 43 1 6 4.5 13 124 22 2 29 2 2 2 24 2 32 21 1 59 5 -0.01 -126 0 0 1 35 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-16 30 11 -16 55 57 -16 26 58 -16 59 10 0.00 45 0 0 -16 8 25 0 29 23.3 9 239 -42 -15 55 29 -16 21 21 -15 52 15 -16 24 34 0.00 46 0 0 -15 33 16 0 29 20.2 8 239 -41 -15 20 17 -15 46 14 -15 17 3 -15 49 28 0.00 47 0 0 -14 57 37 0 29 17.4 7 238 -39 -14 44 36 -15 10 37 -14 41 21 -15 13 52 0.00 48 0 0 -14 21 28 0 29 15.1 5 238 -38 -14 8 26 -14 34 31 -14 5 10 -14 37 47 0.01 49 0 0 -13 44 52 0 29 13.1 4 238 -37 -13 31 46 -13 57 57 -13 28 30 -14 1 13 0.01 50 0 0 -13 7 47 0 29 11.6 3 238 -36 -12 54 40 -13 20 54 -12 51 23 -13 24 11 0.03 51 0 0 -12 30 15 0 29 10.6 2 237 -35 -12 17 5 -12 43 24 -12 13 48 -12 46 41 0.05 52 0 0 -11 52 17 0 29 10.0 1 237 -34 -11 39 5 -12 5 28 -11 35 47 -12 8 46 0.16 Uncertainty in time = +/- 3 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: UCAC4 289-156996 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 09 55.0226 DE: -32 19 29.513 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 09 55.0226 DE: -32 19 29.513 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 12.0 * B mag [mag]: 12.7 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (151) Abundantia asteroid class: approx. diameter [km]: 41 approx. diameter ["]: 0.032 distance from Earth [AU]: 1.75030 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", 95.777° remarks: * orbital elements for (151)Abundantia : Mean anomaly = 110.7222799859 deg Arg. of pericenter = 132.4850825744 deg Long. of node = 38.7342400058 deg Inclination = 6.4313520665 deg Eccentricity = 0.0357649174 Semimajor axis = 2.5918644962 AU Perihelion dist = 2.4991666766 AU Mag: H = 9.20, G = 0.15 Epoch of elements : MJD 60523.03322829 TDT (2024 Aug 01.0332) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#622023Apr24,7.18,2024,8,1,0.797471,-0.004349,-0.019898,-3.136053,0.681870,0.003286,0.000752,0.000001,0.000000 -49.2044,-32.3213,169.63,17.93,False UCAC4 289-156996,18.16528406,-32.3248648,12.65,11.97,11.60,0.0,0,,18.19237164,-32.3213376,1.60,1.54,0,0,0 151,Abundantia,13.29,40.849,1.7503,0,0,-1.241,3.43,,2.0,0 0,110.4782,2024,7,31,132.4851,38.7342,6.4314,0.03576,2.59186,2.49917,9.19,5.0,0.15 1.125,0.0150,0.0037,96,0.0040,Known errors,0.61,0,-1,-1 20240801_156996,60140.23 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 05:26 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org