IOTA/IOTA-ES occultation update for (37) Fides / TYC 1885-00607-1 event on 2024 Mar 28, 19:30 UT Visible from Summary ------- On 2024 Mar 28 UT, the 104.448485656425 km diameter asteroid (37) Fides will occult a 8.7 mag star in the constellation Gemini for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 3.39 mag to 12.08 mag (the magnitude of the asteroid) for at most 4.670 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 Mar 28, 19:26 - 2024 Mar 28, 19:34 * geocentric midpoint of event [JD]: 2460398.31272650 * magnitude of target star: 8.74 * magnitude drop [mag]: 3.39 * estimated maximum duration [s]: 4.670 * Moon: 88 % sunlit, 136° distance * Sun: 84° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 135 * 1 sigma uncertainty interval [path widths]: +/- 0.20 * 1 sigma uncertainty interval [seconds]: +/- 1.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.025, +/- 0.013) * 1 sigma uncertainty ellipse (major, minor, PA): (0.025", 0.013", 91°) * approx speed of asteroid's shadow [km/s]: 22.3890 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1885-00607-1 by 37 Fides on 2024 Mar 28 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 -139 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 39 18 45 .. .. .. 39 37 7 .... -138 0 0 39 6 25 19 26 38.7 1 56 46 38 21 56 39 51 29 38 4 5 40 9 53 .... -137 0 0 39 39 0 19 26 38.8 2 56 47 38 54 26 40 24 8 38 36 34 40 42 35 -0.73 -136 0 0 40 11 30 19 26 39.0 3 57 47 39 26 52 40 56 42 39 8 58 41 15 11 -0.76 -135 0 0 40 43 53 19 26 39.4 3 58 47 39 59 12 41 29 10 39 41 16 41 47 40 -0.78 -134 0 0 41 16 9 19 26 39.8 4 58 47 40 31 24 42 1 30 40 13 27 42 20 1 -0.79 -133 0 0 41 48 17 19 26 40.3 5 59 47 41 3 29 42 33 40 40 45 31 42 52 13 -0.80 -132 0 0 42 20 15 19 26 40.9 6 60 47 41 35 25 43 5 41 41 17 26 43 24 15 -0.80 -131 0 0 42 52 3 19 26 41.6 7 60 47 42 7 10 43 37 31 41 49 10 43 56 6 -0.81 -130 0 0 43 23 38 19 26 42.4 8 61 47 42 38 44 44 9 8 42 20 43 44 27 44 -0.81 -129 0 0 43 55 2 19 26 43.2 9 62 46 43 10 6 44 40 33 42 52 5 44 59 9 -0.81 -128 0 0 44 26 11 19 26 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32 45 38 44 56 40 51 14 -0.86 63 0 0 39 14 44 19 33 45.5 16 291 -47 38 30 8 39 59 54 38 12 15 40 18 21 -0.86 64 0 0 38 41 52 19 33 47.2 15 292 -48 37 57 22 39 26 57 37 39 30 39 45 23 -0.86 65 0 0 38 8 58 19 33 48.8 14 293 -48 37 24 32 38 53 58 37 6 43 39 12 21 -0.87 66 0 0 37 36 1 19 33 50.2 13 293 -49 36 51 41 38 20 55 36 33 54 38 39 16 -0.87 67 0 0 37 3 4 19 33 51.6 12 294 -50 36 18 49 37 47 52 36 1 4 38 6 10 -0.87 68 0 0 36 30 7 19 33 53.0 11 294 -50 35 45 58 37 14 49 35 28 16 37 33 4 -0.88 69 0 0 35 57 11 19 33 54.2 11 295 -51 35 13 9 36 41 46 34 55 29 36 59 59 -0.88 70 0 0 35 24 18 19 33 55.3 10 296 -51 34 40 23 36 8 46 34 22 46 36 26 56 -0.89 71 0 0 34 51 29 19 33 56.3 9 296 -52 34 7 41 35 35 50 33 50 7 35 53 56 -0.90 72 0 0 34 18 45 19 33 57.2 8 297 -52 33 35 5 35 2 59 33 17 33 35 21 2 -0.91 73 0 0 33 46 8 19 33 58.0 7 297 -53 33 2 35 34 30 13 32 45 6 34 48 13 -0.92 74 0 0 33 13 38 19 33 58.7 6 298 -53 32 30 12 33 57 35 32 12 47 34 15 32 -0.94 75 0 0 32 41 16 19 33 59.2 5 299 -53 31 57 58 33 25 5 31 40 36 33 42 58 -0.96 76 0 0 32 9 4 19 33 59.7 4 299 -54 31 25 55 32 52 44 31 8 35 33 10 34 -1.00 77 0 0 31 37 2 19 34 0.1 3 300 -54 30 54 2 32 20 34 30 36 46 32 38 21 -1.07 78 0 0 31 5 13 19 34 0.3 2 300 -54 30 22 21 31 48 36 30 5 8 32 6 19 -1.23 79 0 0 30 33 36 19 34 0.4 1 301 -54 29 50 53 31 16 51 29 33 44 31 34 30 -1.93 80 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 31 2 55 .... Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 14.3 Data for the target star ------------------------ * name: TYC 1885-00607-1 * constellation : Gemini * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 06 10 36.9891 DE: +26 26 54.211 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 06 10 36.9889 DE: +26 26 54.211 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.400,0.300) * V mag [mag]: 8.7 * B mag [mag]: 8.9 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (37) Fides asteroid class: approx. diameter [km]: 104 approx. diameter ["]: 0.066 distance from Earth [AU]: 2.17180 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#144 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): 0.025", 0.013", 90.6° remarks: * orbital elements for (37)Fides : Mean anomaly = 34.8133119010 deg Arg. of pericenter = 62.1748462782 deg Long. of node = 7.2418766647 deg Inclination = 3.0685221394 deg Eccentricity = 0.1750405013 Semimajor axis = 2.6420157400 AU Perihelion dist = 2.1795559805 AU Mag: H = 7.42, G = 0.24 Epoch of elements : MJD 60397.81272625 TDT (2024 Mar 28.8127) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1442023Apr24,4.67,2024,3,28,19.505436,0.055369,0.627301,12.588566,-1.104749,0.005496,-0.000085,0.000000,0.000000 -26.2556,26.4446,-111.38,3.41,False TYC 1885-00607-1,6.17694146,26.4483920,8.86,8.74,8.68,0.1,0,,6.20197434,26.4446181,3.39,3.02,0,0,0 37,Fides,12.08,104.606,2.1718,0,0,3.796,-4.48,,5.2,0 0,34.6268,2024,3,28,62.1748,7.2419,3.0685,0.17504,2.64202,2.17956,7.42,5.0,0.15 1.202,0.0247,0.0133,91,0.0134,Known errors,2.40,0,-1,-1 20240328_0607-1,60139.26 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 14, 06:15 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org