IOTA/IOTA-ES occultation update for (370) Modestia / TYC 6316-01056-1 event on 2024 Nov 05, 17:31 UT Visible from Summary ------- On 2024 Nov 05 UT, the 41.1190377226273 km diameter asteroid (370) Modestia will occult a 9.7 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 5.61 mag to 15.28 mag (the magnitude of the asteroid) for at most 1.510 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 Nov 05, 17:27 - 2024 Nov 05, 17:35 * geocentric midpoint of event [JD]: 2460620.23016633 * magnitude of target star: 9.68 * magnitude drop [mag]: 5.61 * estimated maximum duration [s]: 1.510 * Moon: 16 % sunlit, 28° distance * Sun: 73° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 42 * 1 sigma uncertainty interval [path widths]: +/- 0.11 * 1 sigma uncertainty interval [seconds]: +/- 1.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.017, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.018", 0.002", 71°) * approx speed of asteroid's shadow [km/s]: 27.4675 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6316-01056-1 by 370 Modestia on 2024 Nov 5 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 -100 0 0 - 2 54 38 17 27 37.8 0 107 71 - 3 6 33 - 2 42 42 - 3 9 17 - 2 39 58 .... - 99 0 0 - 3 12 44 17 27 37.9 1 107 72 - 3 24 38 - 3 0 50 - 3 27 22 - 2 58 6 -0.02 - 98 0 0 - 3 30 34 17 27 38.0 2 107 73 - 3 42 27 - 3 18 41 - 3 45 11 - 3 15 57 -0.09 - 97 0 0 - 3 48 7 17 27 38.2 3 107 74 - 4 0 0 - 3 36 14 - 4 2 43 - 3 33 31 -0.12 - 96 0 0 - 4 5 23 17 27 38.5 4 107 75 - 4 17 15 - 3 53 31 - 4 19 58 - 3 50 48 -0.13 - 95 0 0 - 4 22 21 17 27 38.9 5 107 75 - 4 34 12 - 4 10 30 - 4 36 55 - 4 7 47 -0.14 - 94 0 0 - 4 39 2 17 27 39.3 7 106 76 - 4 50 52 - 4 27 12 - 4 53 35 - 4 24 29 -0.14 - 93 0 0 - 4 55 25 17 27 39.9 8 106 77 - 5 7 13 - 4 43 35 - 5 9 56 - 4 40 53 -0.15 - 92 0 0 - 5 11 29 17 27 40.5 9 106 78 - 5 23 17 - 4 59 40 - 5 25 59 - 4 56 58 -0.15 - 91 0 0 - 5 27 14 17 27 41.1 10 106 78 - 5 39 1 - 5 15 27 - 5 41 44 - 5 12 44 -0.15 - 90 0 0 - 5 42 41 17 27 41.9 11 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13 17 35 14.9 1 252 -69 21 48 12 22 12 14 21 45 27 22 14 59 -0.12 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 6316-01056-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 50 21.0724 DE: -16 55 39.393 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 50 21.0723 DE: -16 55 39.393 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 9.7 * B mag [mag]: 10.7 * Diameter [mas]: 0.20 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (370) Modestia asteroid class: approx. diameter [km]: 41 approx. diameter ["]: 0.026 distance from Earth [AU]: 2.21960 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#54 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): 0.018", 0.002", 71.43° remarks: * orbital elements for (370)Modestia : Mean anomaly = 329.2250456821 deg Arg. of pericenter = 68.6074890889 deg Long. of node = 290.8798382288 deg Inclination = 7.8622195999 deg Eccentricity = 0.0904879212 Semimajor axis = 2.3244013638 AU Perihelion dist = 2.1140711163 AU Mag: H = 10.71, G = 0.15 Epoch of elements : MJD 60619.73016612 TDT (2024 Nov 05.7302) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#542023Apr24,1.51,2024,11,5,17.523992,-0.039756,0.170502,15.104607,3.493763,0.005183,0.001107,-0.000001,0.000000 -10.3555,-16.8655,-86.95,-15.98,False TYC 6316-01056-1,19.83918680,-16.9276091,10.74,9.68,9.11,0.2,0,,19.86273266,-16.8654771,5.61,5.73,0,0,0 370,Modestia,15.28,41.441,2.2196,0,0,4.170,13.85,,2.4,0 0,329.0220,2024,11,5,68.6075,290.8798,7.8622,0.09049,2.32440,2.11407,10.70,5.0,0.15 1.115,0.0180,0.0024,71,0.0030,Known errors,1.18,0,-1,-1 20241105_1056-1,60140.68 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 16:23 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org