IOTA/IOTA-ES occultation update for (151) Abundantia / UCAC4 295-170246 event on 2024 Sep 03, 20:13 UT Visible from Summary ------- On 2024 Sep 03 UT, the 40.7812979471842 km diameter asteroid (151) Abundantia will occult a 11.2 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 2.80 mag to 13.95 mag (the magnitude of the asteroid) for at most 5.700 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 Sep 03, 19:59 - 2024 Sep 03, 20:27 * geocentric midpoint of event [JD]: 2460557.34277437 * magnitude of target star: 11.24 * magnitude drop [mag]: 2.80 * estimated maximum duration [s]: 5.700 * Moon: 0 % sunlit, 103° distance * Sun: 111° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 45 * 1 sigma uncertainty interval [path widths]: +/- 0.21 * 1 sigma uncertainty interval [seconds]: +/- 2.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.012, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.012", 0.003", 96°) * approx speed of asteroid's shadow [km/s]: 7.3963 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 295-170246 by 151 Abundantia on 2024 Sep 3 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 -34 45 27 20 0 15.8 0 129 48 -35 1 29 .. .. .. -35 8 8 .. .. .. .... -124 0 0 -35 25 17 20 0 16.0 1 128 47 -35 41 17 -35 9 19 -35 47 56 -35 2 42 0.41 -123 0 0 -36 4 37 20 0 16.6 2 128 47 -36 20 35 -35 48 41 -36 27 13 -35 42 5 0.42 -122 0 0 -36 43 26 20 0 17.4 3 127 46 -36 59 22 -36 27 32 -37 5 59 -36 20 57 0.43 -121 0 0 -37 21 43 20 0 18.5 4 127 46 -37 37 36 -37 5 51 -37 44 12 -36 59 17 0.43 -120 0 0 -37 59 26 20 0 19.9 5 126 45 -38 15 17 -37 43 38 -38 21 53 -37 37 5 0.43 -119 0 0 -38 36 36 20 0 21.5 6 125 44 -38 52 25 -38 20 50 -38 58 59 -38 14 19 0.43 -118 0 0 -39 13 11 20 0 23.5 7 125 44 -39 28 57 -38 57 28 -39 35 30 -38 50 58 0.43 -117 0 0 -39 49 11 20 0 25.6 8 124 43 -40 4 53 -39 33 31 -40 11 25 -39 27 2 0.43 -116 0 0 -40 24 35 20 0 28.1 9 123 42 -40 40 14 -40 8 58 -40 46 44 -40 2 30 0.43 -115 0 0 -40 59 22 20 0 30.7 10 123 42 -41 14 57 -40 43 48 -41 21 26 -40 37 21 0.43 -114 0 0 -41 33 31 20 0 33.6 11 122 41 -41 49 3 -41 18 1 -41 55 31 -41 11 36 0.43 -113 0 0 -42 7 3 20 0 36.7 12 121 40 -42 22 32 -41 51 37 -42 28 58 -41 45 13 0.43 -112 0 0 -42 39 57 20 0 40.0 13 121 40 -42 55 22 -42 24 35 -43 1 47 -42 18 12 0.43 -111 0 0 -43 12 13 20 0 43.4 14 120 39 -43 27 34 -42 56 54 -43 33 57 -42 50 34 0.43 -110 0 0 -43 43 51 20 0 47.1 15 119 38 -43 59 8 -43 28 35 -44 5 29 -43 22 16 0.43 -109 0 0 -44 14 49 20 0 51.0 16 118 38 -44 30 2 -43 59 38 -44 36 22 -43 53 21 0.43 -108 0 0 -44 45 9 20 0 55.0 17 118 37 -45 0 18 -44 30 2 -45 6 36 -44 23 46 0.43 -107 0 0 -45 14 50 20 0 59.1 17 117 36 -45 29 55 -44 59 47 -45 36 11 -44 53 33 0.43 -106 0 0 -45 43 52 20 1 3.4 18 116 36 -45 58 53 -45 28 54 -46 5 7 -45 22 41 0.43 -105 0 0 -46 12 16 20 1 7.9 19 115 35 -46 27 12 -45 57 21 -46 33 24 -45 51 11 0.43 -104 0 0 -46 40 0 20 1 12.5 20 115 34 -46 54 52 -46 25 10 -47 1 3 -46 19 2 0.42 -103 0 0 -47 7 7 20 1 17.2 21 114 34 -47 21 54 -46 52 21 -47 28 3 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Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.5 Data for the target star ------------------------ * name: UCAC4 295-170246 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 10 36.3505 DE: -31 11 15.215 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 10 36.3504 DE: -31 11 15.215 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.500,0.300) * V mag [mag]: 11.2 * B mag [mag]: 13.6 * Diameter [mas]: 0.90 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (151) Abundantia asteroid class: approx. diameter [km]: 41 approx. diameter ["]: 0.027 distance from Earth [AU]: 2.10910 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): 0.012", 0.003", 95.721° remarks: * orbital elements for (151)Abundantia : Mean anomaly = 118.7384527238 deg Arg. of pericenter = 132.4548375115 deg Long. of node = 38.7336043169 deg Inclination = 6.4313272325 deg Eccentricity = 0.0357822123 Semimajor axis = 2.5918013606 AU Perihelion dist = 2.4990609740 AU Mag: H = 9.20, G = 0.15 Epoch of elements : MJD 60556.84277375 TDT (2024 Sep 03.8428) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#622023Apr24,5.70,2024,9,3,20.226585,0.124887,-0.349270,3.930420,1.407067,0.005250,0.000381,0.000000,0.000000 -13.7985,-31.1841,-123.62,7.13,False UCAC4 295-170246,18.17676404,-31.1875598,13.58,11.24,9.98,0.9,4,,18.20350007,-31.1840690,2.79,3.56,0,0,1 151,Abundantia,13.95,42.158,2.1091,0,0,1.278,5.87,,2.0,0 0,118.5394,2024,9,3,132.4548,38.7336,6.4313,0.03578,2.59180,2.49906,9.19,5.0,0.15 1.207,0.0120,0.0027,96,0.0057,Known errors,0.72,0,-1,-1 20240903_170246,60140.54 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 12:56 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org