IOTA/IOTA-ES occultation update for (847) Agnia / TYC 5547-00756-1 event on 2024 Dec 18, 09:47 UT Visible from Summary ------- On 2024 Dec 18 UT, the 27.471 km diameter asteroid (847) Agnia will occult a 11.8 mag star in the constellation Virgo for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.24 mag to 16.05 mag (the magnitude of the asteroid) for at most 0.950 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 Dec 18, 09:44 - 2024 Dec 18, 09:51 * geocentric midpoint of event [JD]: 2460662.90801237 * magnitude of target star: 11.83 * magnitude drop [mag]: 4.24 * estimated maximum duration [s]: 0.950 * Moon: 89 % sunlit, 79° distance * Sun: 64° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 30 * 1 sigma uncertainty interval [path widths]: +/- 0.29 * 1 sigma uncertainty interval [seconds]: +/- 0.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.008, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.009", 0.003", 116°) * approx speed of asteroid's shadow [km/s]: 28.9148 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5547-00756-1 by 847 Agnia on 2024 Dec 18 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 -122 0 0 1 34 43 9 44 7.3 0 101 -58 1 26 31 1 42 54 1 21 46 1 47 39 .... -121 0 0 1 22 22 9 44 7.4 1 101 -57 1 14 9 1 30 34 1 9 24 1 35 19 0.31 -120 0 0 1 9 32 9 44 7.5 2 101 -56 1 1 18 1 17 45 0 56 32 1 22 30 0.35 -119 0 0 0 56 13 9 44 7.7 3 101 -55 0 47 58 1 4 27 0 43 12 1 9 12 0.37 -118 0 0 0 42 25 9 44 8.0 4 101 -54 0 34 10 0 50 40 0 29 23 0 55 26 0.38 -117 0 0 0 28 9 9 44 8.4 5 101 -53 0 19 53 0 36 25 0 15 6 0 41 11 0.38 -116 0 0 0 13 25 9 44 8.8 6 101 -52 0 5 8 0 21 41 0 0 20 0 26 28 0.39 -115 0 0 - 0 1 48 9 44 9.3 8 101 -51 - 0 10 6 0 6 29 - 0 14 55 0 11 17 0.39 -114 0 0 - 0 17 29 9 44 9.9 9 101 -50 - 0 25 48 - 0 9 11 - 0 30 37 - 0 4 22 0.39 -113 0 0 - 0 33 38 9 44 10.6 10 101 -49 - 0 41 58 - 0 25 19 - 0 46 48 - 0 20 30 0.39 -112 0 0 - 0 50 15 9 44 11.4 11 101 -48 - 0 58 36 - 0 41 55 - 1 3 26 - 0 37 5 0.39 -111 0 0 - 1 7 20 9 44 12.2 12 101 -47 - 1 15 42 - 0 58 58 - 1 20 33 - 0 54 8 0.39 -110 0 0 - 1 24 52 9 44 13.1 13 101 -46 - 1 33 15 - 1 16 29 - 1 38 6 - 1 11 39 0.40 -109 0 0 - 1 42 51 9 44 14.1 14 101 -45 - 1 51 16 - 1 34 28 - 1 56 8 - 1 29 37 0.40 -108 0 0 - 2 1 18 9 44 15.2 15 101 -44 - 2 9 43 - 1 52 53 - 2 14 36 - 1 48 2 0.40 -107 0 0 - 2 20 12 9 44 16.3 16 101 -43 - 2 28 38 - 2 11 46 - 2 33 31 - 2 6 53 0.40 -106 0 0 - 2 39 32 9 44 17.6 17 101 -42 - 2 47 59 - 2 31 5 - 2 52 53 - 2 26 12 0.40 -105 0 0 - 2 59 19 9 44 18.9 18 101 -41 - 3 7 47 - 2 50 50 - 3 12 42 - 2 45 57 0.40 -104 0 0 - 3 19 31 9 44 20.3 19 101 -40 - 3 28 1 - 3 11 2 - 3 32 56 - 3 6 8 0.40 -103 0 0 - 3 40 10 9 44 21.7 20 101 -39 - 3 48 41 - 3 31 40 - 3 53 36 - 3 26 45 0.40 -102 0 0 - 4 1 14 9 44 23.3 21 100 -38 - 4 9 46 - 3 52 43 - 4 14 42 - 3 47 47 0.40 -101 0 0 - 4 22 43 9 44 24.9 22 100 -37 - 4 31 16 - 4 14 11 - 4 36 14 - 4 9 14 0.40 -100 0 0 - 4 44 38 9 44 26.6 23 100 -36 - 4 53 12 - 4 36 4 - 4 58 10 - 4 31 7 0.40 - 99 0 0 - 5 6 56 9 44 28.4 24 100 -35 - 5 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62 0 0 -45 14 51 9 50 56.1 3 258 57 -45 23 6 -45 6 37 -45 27 53 -45 1 51 0.47 63 0 0 -45 4 16 9 50 56.3 3 257 56 -45 12 31 -44 56 0 -45 17 18 -44 51 14 0.49 64 0 0 -44 53 18 9 50 56.4 2 256 56 -45 1 35 -44 45 2 -45 6 23 -44 40 15 0.52 65 0 0 -44 41 59 9 50 56.5 1 256 55 -44 50 17 -44 33 42 -44 55 5 -44 28 55 0.59 66 0 0 -44 30 19 9 50 56.6 1 255 55 -44 38 37 -44 22 0 -44 43 26 -44 17 12 0.85 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 5547-00756-1 * constellation : Virgo * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 13 22 15.1536 DE: -11 04 19.173 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 13 22 15.1537 DE: -11 04 19.173 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.100) * V mag [mag]: 11.8 * B mag [mag]: 12.3 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (847) Agnia asteroid class: approx. diameter [km]: 27 approx. diameter ["]: 0.011 distance from Earth [AU]: 3.30010 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#55 date of fit: 2023 Apr 27 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): 0.009", 0.003", 116.181° remarks: * orbital elements for (847)Agnia : Mean anomaly = 140.3130518577 deg Arg. of pericenter = 128.6870108559 deg Long. of node = 270.6909911343 deg Inclination = 2.4812939531 deg Eccentricity = 0.0945045828 Semimajor axis = 2.7821607275 AU Perihelion dist = 2.5192337886 AU Mag: H = 10.17, G = 0.15 Epoch of elements : MJD 60662.40801266 TDT (2024 Dec 18.4080) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#552023Apr27,0.95,2024,12,18,9.792297,-0.147068,-0.340613,14.973401,-6.492282,-0.004995,0.001886,-0.000001,0.000000 -33.4972,-11.2016,32.31,-23.40,False TYC 5547-00756-1,13.37087598,-11.0719923,12.31,11.83,11.57,0.0,0,,13.39265058,-11.2016163,4.24,4.05,0,0,0 847,Agnia,16.05,27.471,3.3001,0,0,2.713,-17.31,,1.6,0 0,140.2264,2024,12,18,128.6870,270.6910,2.4813,0.09450,2.78216,2.51923,10.17,5.0,0.15 1.289,0.0087,0.0033,116,0.0033,Known errors,1.60,0,-1,-1 20241218_0756-1,60140.74 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 17:52 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org