IOTA/IOTA-ES occultation update for (1968) Mehltretter / TYC 6359-00275-1 event on 2024 Jul 21, 02:16 UT Visible from Summary ------- On 2024 Jul 21 UT, the 13.1514544642355 km diameter asteroid (1968) Mehltretter will occult a 10.5 mag star in the constellation Capricornus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.89 mag to 15.39 mag (the magnitude of the asteroid) for at most 1.340 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: 96 * date and approx. time of event: 2024 Jul 21, 02:06 - 2024 Jul 21, 02:25 * geocentric midpoint of event [JD]: 2460512.59447204 * magnitude of target star: 10.51 * magnitude drop [mag]: 4.89 * estimated maximum duration [s]: 1.340 * Moon: 100 % sunlit, 21° distance * Sun: 163° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 15 * 1 sigma uncertainty interval [path widths]: +/- 0.42 * 1 sigma uncertainty interval [seconds]: +/- 2.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.019, +/- 0.007) * 1 sigma uncertainty ellipse (major, minor, PA): (0.020", 0.004", 73°) * approx speed of asteroid's shadow [km/s]: 9.9035 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6359-00275-1 by 1968 Mehltretter on 2024 Jul 21 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 -133 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -48 3 25 .... -132 0 0 -48 21 39 2 25 33.4 1 123 -10 -48 16 50 -48 26 29 -48 12 43 -48 30 36 .... -131 0 0 -48 48 17 2 25 33.2 2 123 -11 -48 43 29 -48 53 6 -48 39 24 -48 57 12 0.49 -130 0 0 -49 14 20 2 25 32.9 2 122 -12 -49 9 33 -49 19 7 -49 5 28 -49 23 12 0.49 -129 0 0 -49 39 48 2 25 32.4 3 121 -13 -49 35 2 -49 44 34 -49 30 58 -49 48 38 0.49 -128 0 0 -50 4 41 2 25 31.8 4 120 -13 -49 59 56 -50 9 26 -49 55 54 -50 13 29 0.49 -127 0 0 -50 29 0 2 25 31.1 5 120 -14 -50 24 16 -50 33 44 -50 20 15 -50 37 46 0.50 -126 0 0 -50 52 44 2 25 30.2 5 119 -15 -50 48 2 -50 57 27 -50 44 1 -51 1 28 0.50 -125 0 0 -51 15 55 2 25 29.3 6 118 -16 -51 11 14 -51 20 37 -51 7 14 -51 24 37 0.50 -124 0 0 -51 38 32 2 25 28.2 7 117 -16 -51 33 52 -51 43 13 -51 29 54 -51 47 12 0.50 -123 0 0 -52 0 37 2 25 27.1 8 117 -17 -51 55 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49 0.56 74 0 0 - 3 37 30 2 6 33.3 6 248 12 - 3 33 5 - 3 41 56 - 3 29 19 - 3 45 42 0.57 75 0 0 - 3 10 0 2 6 32.1 4 248 13 - 3 5 36 - 3 14 24 - 3 1 51 - 3 18 10 0.59 76 0 0 - 2 43 6 2 6 31.1 3 248 14 - 2 38 42 - 2 47 29 - 2 34 58 - 2 51 14 0.62 77 0 0 - 2 16 48 2 6 30.4 2 248 15 - 2 12 25 - 2 21 10 - 2 8 42 - 2 24 54 0.67 78 0 0 - 1 51 6 2 6 30.0 1 248 16 - 1 46 45 - 1 55 28 - 1 43 3 - 1 59 11 0.83 79 0 0 - 1 26 2 2 6 29.8 0 248 17 - 1 21 42 - 1 30 23 - 1 18 0 - 1 34 5 3.29 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: TYC 6359-00275-1 * constellation : Capricornus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 21 16 43.7744 DE: -22 19 09.264 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 21 16 43.7744 DE: -22 19 09.264 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 10.5 * B mag [mag]: 11.0 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1968) Mehltretter asteroid class: approx. diameter [km]: 13 approx. diameter ["]: 0.011 distance from Earth [AU]: 1.63450 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#56 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): 0.020", 0.004", 73.039° remarks: * orbital elements for (1968)Mehltretter : Mean anomaly = 61.4299168010 deg Arg. of pericenter = 163.7921183066 deg Long. of node = 71.4693916619 deg Inclination = 4.5929297706 deg Eccentricity = 0.1113124980 Semimajor axis = 2.7393873463 AU Perihelion dist = 2.4344592979 AU Mag: H = 11.73, G = 0.15 Epoch of elements : MJD 60512.09447229 TDT (2024 Jul 21.0945) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#562023Apr24,1.34,2024,7,21,2.267329,0.199161,-0.412436,-5.033503,-2.430967,-0.001628,0.000077,0.000001,0.000000 -13.8168,-22.2154,147.61,20.39,False TYC 6359-00275-1,21.27882621,-22.3192401,11.04,10.51,10.22,0.1,0,,21.30260905,-22.2154286,4.89,4.73,0,0,0 1968,Mehltretter,15.39,13.270,1.6345,0,0,-1.950,-13.08,,1.2,0 0,61.4094,2024,7,21,163.7921,71.4694,4.5929,0.11131,2.73939,2.43446,11.73,5.0,0.15 1.426,0.0200,0.0037,73,0.0048,Known errors,0.85,0,-1,-1 20240721_0275-1,60140.21 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 05:05 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org