IOTA/IOTA-ES occultation update for (145) Adeona / TYC 6917-00994-1 event on 2024 Nov 23, 21:41 UT Visible from Summary ------- On 2024 Nov 23 UT, the 137.876056253444 km diameter asteroid (145) Adeona will occult a 10.7 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 3.52 mag to 14.19 mag (the magnitude of the asteroid) for at most 4.400 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: 100 * date and approx. time of event: 2024 Nov 23, 21:37 - 2024 Nov 23, 21:44 * geocentric midpoint of event [JD]: 2460638.40378391 * magnitude of target star: 10.71 * magnitude drop [mag]: 3.52 * estimated maximum duration [s]: 4.400 * Moon: 41 % sunlit, 137° distance * Sun: 58° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 138 * 1 sigma uncertainty interval [path widths]: +/- 0.07 * 1 sigma uncertainty interval [seconds]: +/- 0.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.007, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.007", 0.004", 90°) * approx speed of asteroid's shadow [km/s]: 31.3933 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6917-00994-1 by 145 Adeona on 2024 Nov 23 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 -180 0 0 -11 26 59 21 38 4.1 0 120 58 -12 10 17 -10 43 40 -12 16 42 -10 37 14 .... -179 0 0 -12 0 58 21 38 4.2 2 120 59 -12 44 9 -11 17 46 -12 50 34 -11 11 21 0.07 -178 0 0 -12 34 32 21 38 4.3 3 120 60 -13 17 36 -11 51 26 -13 24 0 -11 45 2 0.02 -177 0 0 -13 7 39 21 38 4.5 4 119 61 -13 50 36 -12 24 41 -13 56 59 -12 18 18 0.00 -176 0 0 -13 40 20 21 38 4.8 5 119 62 -14 23 10 -12 57 28 -14 29 31 -12 51 6 -0.01 -175 0 0 -14 12 32 21 38 5.2 6 119 63 -14 55 15 -13 29 48 -15 1 35 -13 23 27 -0.02 -174 0 0 -14 44 17 21 38 5.7 7 119 64 -15 26 52 -14 1 40 -15 33 11 -13 55 20 -0.02 -173 0 0 -15 15 33 21 38 6.2 8 118 65 -15 58 0 -14 33 3 -16 4 18 -14 26 45 -0.03 -172 0 0 -15 46 19 21 38 6.8 9 118 67 -16 28 39 -15 3 57 -16 34 56 -14 57 40 -0.03 -171 0 0 -16 16 35 21 38 7.5 10 118 68 -16 58 48 -15 34 21 -17 5 4 -15 28 5 -0.03 -170 0 0 -16 46 22 21 38 8.2 12 118 69 -17 28 26 -16 4 16 -17 34 41 -15 58 0 -0.03 -169 0 0 -17 15 38 21 38 9.0 13 117 70 -17 57 34 -16 33 39 -18 3 48 -16 27 25 -0.03 -168 0 0 -17 44 22 21 38 9.9 14 117 71 -18 26 11 -17 2 32 -18 32 24 -16 56 19 -0.04 -167 0 0 -18 12 36 21 38 10.8 15 117 72 -18 54 17 -17 30 53 -19 0 28 -17 24 41 -0.04 -166 0 0 -18 40 18 21 38 11.8 16 116 73 -19 21 51 -17 58 43 -19 28 1 -17 52 32 -0.04 -165 0 0 -19 7 28 21 38 12.9 17 116 74 -19 48 53 -18 26 1 -19 55 2 -18 19 51 -0.04 -164 0 0 -19 34 5 21 38 14.0 18 116 75 -20 15 23 -18 52 46 -20 21 30 -18 46 38 -0.04 -163 0 0 -20 0 11 21 38 15.2 19 115 76 -20 41 20 -19 18 59 -20 47 27 -19 12 52 -0.04 -162 0 0 -20 25 43 21 38 16.4 20 115 77 -21 6 45 -19 44 40 -21 12 51 -19 38 34 -0.04 -161 0 0 -20 50 44 21 38 17.7 21 115 78 -21 31 38 -20 9 48 -21 37 42 -20 3 43 -0.04 -160 0 0 -21 15 11 21 38 19.0 22 114 79 -21 55 57 -20 34 23 -22 2 0 -20 28 19 -0.04 -159 0 0 -21 39 5 21 38 20.4 23 114 79 -22 19 44 -20 58 25 -22 25 46 -20 52 23 -0.04 -158 0 0 -22 2 26 21 38 21.8 24 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Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 6917-00994-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 20 13 46.5312 DE: -29 34 40.274 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 20 13 46.5311 DE: -29 34 40.275 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 10.7 * B mag [mag]: 11.2 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (145) Adeona asteroid class: approx. diameter [km]: 138 approx. diameter ["]: 0.055 distance from Earth [AU]: 3.46000 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#118 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): 0.007", 0.004", 90.456° remarks: * orbital elements for (145)Adeona : Mean anomaly = 197.5961595822 deg Arg. of pericenter = 45.2095976900 deg Long. of node = 77.3246871416 deg Inclination = 12.6217496753 deg Eccentricity = 0.1472251569 Semimajor axis = 2.6714723783 AU Perihelion dist = 2.2781644384 AU Mag: H = 8.21, G = 0.15 Epoch of elements : MJD 60637.90378375 TDT (2024 Nov 23.9038) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1182023Apr24,4.40,2024,11,23,21.690814,-0.014773,0.052043,17.039971,4.859235,0.005036,0.000619,-0.000001,0.000000 -84.8868,-29.5047,-148.70,-20.58,False TYC 6917-00994-1,20.22959205,-29.5778540,11.20,10.71,10.45,0.1,0,,20.25500548,-29.5047297,3.52,3.35,0,0,0 145,Adeona,14.19,138.127,3.4600,0,0,3.318,12.35,,8.8,0 0,197.3922,2024,11,23,45.2096,77.3247,12.6217,0.14723,2.67147,2.27816,8.21,5.0,0.15 1.074,0.0073,0.0037,90,0.0041,Known errors,0.91,0,-1,-1 20241123_0994-1,60140.71 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 17:04 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org