IOTA/IOTA-ES occultation update for (1154) Astronomia / TYC 4669-00458-1 event on 2024 Oct 15, 01:26 UT Visible from Summary ------- On 2024 Oct 15 UT, the 61.173 km diameter asteroid (1154) Astronomia will occult a 11.2 mag star in the constellation Pisces for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.28 mag to 15.50 mag (the magnitude of the asteroid) for at most 5.490 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 Oct 15, 01:17 - 2024 Oct 15, 01:36 * geocentric midpoint of event [JD]: 2460598.56024200 * magnitude of target star: 11.24 * magnitude drop [mag]: 4.28 * estimated maximum duration [s]: 5.490 * Moon: 91 % sunlit, 14° distance * Sun: 157° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 64 * 1 sigma uncertainty interval [path widths]: +/- 0.17 * 1 sigma uncertainty interval [seconds]: +/- 4.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.029, +/- 0.014) * 1 sigma uncertainty ellipse (major, minor, PA): (0.032", 0.004", 66°) * approx speed of asteroid's shadow [km/s]: 11.1509 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 4669-00458-1 by 1154 Astronomia on 2024 Oct 15 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 -33 59 30 1 35 49.8 1 96 22 -33 42 3 -34 16 57 -33 36 3 -34 22 59 .... -137 0 0 -34 4 54 1 35 49.6 2 96 21 -33 47 29 -34 22 22 -33 41 29 -34 28 23 0.25 -136 0 0 -34 10 3 1 35 49.3 2 95 20 -33 52 38 -34 27 30 -33 46 38 -34 33 31 0.27 -135 0 0 -34 14 56 1 35 48.9 3 94 19 -33 57 31 -34 32 22 -33 51 32 -34 38 23 0.28 -134 0 0 -34 19 33 1 35 48.3 4 94 18 -34 2 8 -34 36 59 -33 56 9 -34 42 59 0.29 -133 0 0 -34 23 53 1 35 47.7 5 93 18 -34 6 29 -34 41 19 -34 0 30 -34 47 19 0.29 -132 0 0 -34 27 58 1 35 46.8 6 93 17 -34 10 34 -34 45 23 -34 4 35 -34 51 23 0.30 -131 0 0 -34 31 46 1 35 45.9 7 92 16 -34 14 23 -34 49 11 -34 8 24 -34 55 11 0.30 -130 0 0 -34 35 19 1 35 44.9 7 92 15 -34 17 56 -34 52 43 -34 11 58 -34 58 43 0.30 -129 0 0 -34 38 36 1 35 43.7 8 91 14 -34 21 13 -34 56 0 -34 15 15 -35 2 0 0.30 -128 0 0 -34 41 36 1 35 42.4 9 90 14 -34 24 14 -34 59 0 -34 18 16 -35 5 0 0.30 -127 0 0 -34 44 21 1 35 41.0 10 90 13 -34 26 59 -35 1 44 -34 21 1 -35 7 44 0.30 -126 0 0 -34 46 50 1 35 39.5 11 89 12 -34 29 28 -35 4 13 -34 23 30 -35 10 13 0.30 -125 0 0 -34 49 2 1 35 37.8 11 89 11 -34 31 41 -35 6 25 -34 25 43 -35 12 25 0.30 -124 0 0 -34 50 59 1 35 36.1 12 88 10 -34 33 38 -35 8 22 -34 27 40 -35 14 22 0.30 -123 0 0 -34 52 40 1 35 34.2 13 88 9 -34 35 19 -35 10 3 -34 29 21 -35 16 2 0.31 -122 0 0 -34 54 5 1 35 32.2 14 87 9 -34 36 44 -35 11 28 -34 30 46 -35 17 27 0.31 -121 0 0 -34 55 14 1 35 30.1 15 86 8 -34 37 53 -35 12 37 -34 31 55 -35 18 36 0.31 -120 0 0 -34 56 8 1 35 27.8 16 86 7 -34 38 47 -35 13 30 -34 32 49 -35 19 30 0.31 -119 0 0 -34 56 45 1 35 25.5 16 85 6 -34 39 24 -35 14 8 -34 33 26 -35 20 7 0.31 -118 0 0 -34 57 7 1 35 23.0 17 85 5 -34 39 46 -35 14 29 -34 33 48 -35 20 29 0.31 -117 0 0 -34 57 13 1 35 20.5 18 84 5 -34 39 52 -35 14 35 -34 33 54 -35 20 35 0.31 -116 0 0 -34 57 3 1 35 17.8 19 83 4 -34 39 42 -35 14 26 -34 33 44 -35 20 25 0.31 -115 0 0 -34 56 37 1 35 15.0 20 83 3 -34 39 16 -35 14 0 -34 33 18 -35 20 0 0.31 -114 0 0 -34 55 56 1 35 12.1 20 82 2 -34 38 35 -35 13 19 -34 32 36 -35 19 19 0.31 -113 0 0 -34 54 59 1 35 9.1 21 82 1 -34 37 38 -35 12 22 -34 31 39 -35 18 22 0.31 -112 0 0 -34 53 46 1 35 6.0 22 81 1 -34 36 25 -35 11 10 -34 30 26 -35 17 9 0.31 -111 0 0 -34 52 18 1 35 2.7 23 81 0 -34 34 56 -35 9 42 -34 28 58 -35 15 41 0.31 -110 0 0 -34 50 34 1 34 59.4 24 80 -1 -34 33 12 -35 7 58 -34 27 14 -35 13 58 0.31 -109 0 0 -34 48 35 1 34 55.9 24 79 -2 -34 31 12 -35 5 59 -34 25 14 -35 11 59 0.31 -108 0 0 -34 46 20 1 34 52.4 25 79 -3 -34 28 57 -35 3 44 -34 22 58 -35 9 44 0.31 -107 0 0 -34 43 49 1 34 48.7 26 78 -3 -34 26 26 -35 1 14 -34 20 27 -35 7 14 0.31 -106 0 0 -34 41 3 1 34 44.9 27 77 -4 -34 23 39 -34 58 28 -34 17 41 -35 4 28 0.31 -105 0 0 -34 38 1 1 34 41.0 28 77 -5 -34 20 38 -34 55 27 -34 14 38 -35 1 27 0.31 -104 0 0 -34 34 44 1 34 37.0 28 76 -6 -34 17 20 -34 52 10 -34 11 21 -34 58 11 0.31 -103 0 0 -34 31 12 1 34 32.9 29 76 -7 -34 13 47 -34 48 38 -34 7 48 -34 54 39 0.31 -102 0 0 -34 27 24 1 34 28.7 30 75 -7 -34 9 59 -34 44 51 -34 3 59 -34 50 52 0.31 -101 0 0 -34 23 21 1 34 24.4 31 74 -8 -34 5 55 -34 40 48 -33 59 56 -34 46 49 0.31 -100 0 0 -34 19 2 1 34 20.0 32 74 -9 -34 1 36 -34 36 30 -33 55 37 -34 42 31 0.31 - 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1 56 59 1 17 44.5 7 265 -24 - 1 39 28 - 2 14 32 - 1 33 27 - 2 20 35 0.34 43 0 0 - 1 49 5 1 17 43.2 6 265 -23 - 1 31 35 - 2 6 37 - 1 25 34 - 2 12 40 0.34 44 0 0 - 1 41 29 1 17 42.1 5 265 -22 - 1 23 59 - 1 59 0 - 1 17 58 - 2 5 2 0.35 45 0 0 - 1 34 10 1 17 41.2 4 265 -22 - 1 16 41 - 1 51 41 - 1 10 40 - 1 57 43 0.36 46 0 0 - 1 27 10 1 17 40.5 3 265 -21 - 1 9 41 - 1 44 40 - 1 3 41 - 1 50 42 0.37 47 0 0 - 1 20 28 1 17 39.9 2 265 -20 - 1 3 0 - 1 37 58 - 0 56 59 - 1 44 0 0.39 48 0 0 - 1 14 4 1 17 39.6 1 265 -19 - 0 56 37 - 1 31 34 - 0 50 36 - 1 37 35 0.45 49 0 0 - 1 7 59 1 17 39.4 0 265 -18 - 0 50 32 - 1 25 28 - 0 44 32 - 1 31 30 0.78 Uncertainty in time = +/- 5 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: TYC 4669-00458-1 * constellation : Pisces * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 00 09 54.0955 DE: -05 37 28.801 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 00 09 54.0955 DE: -05 37 28.801 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.2 * B mag [mag]: 11.8 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1154) Astronomia asteroid class: approx. diameter [km]: 61 approx. diameter ["]: 0.035 distance from Earth [AU]: 2.38350 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#59 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", 0.004", 65.83° remarks: * orbital elements for (1154)Astronomia : Mean anomaly = 70.7146951675 deg Arg. of pericenter = 205.4404272667 deg Long. of node = 82.4791700943 deg Inclination = 4.5325341156 deg Eccentricity = 0.0699739011 Semimajor axis = 3.3891208271 AU Perihelion dist = 3.1519708217 AU Mag: H = 10.50, G = 0.15 Epoch of elements : MJD 60598.06024204 TDT (2024 Oct 15.0602) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#592023Apr24,5.49,2024,10,15,1.445808,0.084860,-0.288278,-6.037924,-1.776709,0.001783,0.001413,0.000001,0.000000 -42.9680,-5.4851,154.76,-8.64,False TYC 4669-00458-1,0.16502654,-5.6246669,11.77,11.24,10.95,0.0,0,,0.18645935,-5.4851016,4.28,4.12,0,0,0 1154,Astronomia,15.50,61.173,2.3835,0,0,-1.492,-6.55,,3.0,0 0,70.5472,2024,10,14,205.4404,82.4792,4.5325,0.06997,3.38912,3.15197,10.50,5.0,0.15 1.172,0.0320,0.0043,66,0.0061,Known errors,1.04,0,-1,-1 20241015_0458-1,60140.64 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:15 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org