IOTA/IOTA-ES occultation update for (1674) Groeneveld / TYC 5590-00779-1 event on 2024 Feb 11, 19:52 UT Visible from Summary ------- On 2024 Feb 11 UT, the 29.676 km diameter asteroid (1674) Groeneveld will occult a 11.2 mag star in the constellation Libra for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.00 mag to 17.16 mag (the magnitude of the asteroid) for at most 2.750 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 Feb 11, 19:42 - 2024 Feb 11, 20:02 * geocentric midpoint of event [JD]: 2460352.32827579 * magnitude of target star: 11.16 * magnitude drop [mag]: 6.00 * estimated maximum duration [s]: 2.750 * Moon: 5 % sunlit, 124° distance * Sun: 98° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 30 * 1 sigma uncertainty interval [path widths]: +/- 0.17 * 1 sigma uncertainty interval [seconds]: +/- 3.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.016, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.017", 0.001", 108°) * approx speed of asteroid's shadow [km/s]: 10.7734 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5590-00779-1 by 1674 Groeneveld on 2024 Feb 11 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 56 0 0 .. .. .... .. .. .. .. .. .. 2 17 39 .. .. .. 2 14 48 .. .. .. .... 57 0 0 2 11 28 19 43 1.0 1 104 -74 2 3 2 2 19 53 2 0 11 2 22 44 .... 58 0 0 1 56 36 19 43 1.3 2 104 -75 1 48 10 2 5 2 1 45 19 2 7 53 0.18 59 0 0 1 41 30 19 43 1.8 3 104 -75 1 33 3 1 49 56 1 30 12 1 52 48 0.18 60 0 0 1 26 9 19 43 2.5 4 104 -75 1 17 42 1 34 35 1 14 50 1 37 27 0.18 61 0 0 1 10 33 19 43 3.3 5 104 -76 1 2 6 1 19 0 0 59 14 1 21 52 0.18 62 0 0 0 54 43 19 43 4.4 6 104 -76 0 46 15 1 3 11 0 43 23 1 6 3 0.18 63 0 0 0 38 40 19 43 5.7 7 104 -76 0 30 11 0 47 8 0 27 19 0 50 0 0.18 64 0 0 0 22 22 19 43 7.2 8 104 -76 0 13 53 0 30 51 0 11 1 0 33 43 0.18 65 0 0 0 5 51 19 43 8.8 9 104 -76 - 0 2 38 0 14 20 - 0 5 31 0 17 13 0.18 66 0 0 - 0 10 53 19 43 10.7 10 104 -76 - 0 19 23 - 0 2 23 - 0 22 16 0 0 30 0.18 67 0 0 - 0 27 50 19 43 12.8 11 104 -76 - 0 36 20 - 0 19 20 - 0 39 13 - 0 16 27 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30 19 20 2 19.7 9 259 71 -23 38 41 -23 21 57 -23 41 31 -23 19 7 0.20 -133 0 0 -23 18 1 20 2 21.3 8 259 72 -23 26 24 -23 9 39 -23 29 14 -23 6 49 0.20 -132 0 0 -23 5 28 20 2 22.7 8 259 73 -23 13 51 -22 57 5 -23 16 42 -22 54 15 0.20 -131 0 0 -22 52 40 20 2 23.9 7 258 74 -23 1 4 -22 44 17 -23 3 54 -22 41 26 0.20 -130 0 0 -22 39 38 20 2 25.0 6 258 75 -22 48 1 -22 31 14 -22 50 52 -22 28 23 0.21 -129 0 0 -22 26 21 20 2 25.9 5 257 76 -22 34 45 -22 17 56 -22 37 36 -22 15 5 0.22 -128 0 0 -22 12 49 20 2 26.6 4 257 77 -22 21 14 -22 4 25 -22 24 5 -22 1 33 0.23 -127 0 0 -21 59 4 20 2 27.2 3 257 78 -22 7 29 -21 50 39 -22 10 20 -21 47 47 0.24 -126 0 0 -21 45 4 20 2 27.6 2 256 78 -21 53 30 -21 36 39 -21 56 22 -21 33 48 0.28 -125 0 0 -21 30 52 20 2 27.8 1 256 79 -21 39 18 -21 22 25 -21 42 9 -21 19 34 0.39 Uncertainty in time = +/- 3 secs Prediction of 2023 Jul 13.2 Data for the target star ------------------------ * name: TYC 5590-00779-1 * constellation : Libra * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 14 48 54.5175 DE: -13 22 48.482 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 14 48 54.5181 DE: -13 22 48.484 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.2 * B mag [mag]: 11.6 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1674) Groeneveld asteroid class: approx. diameter [km]: 30 approx. diameter ["]: 0.014 distance from Earth [AU]: 2.96450 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#52 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): 0.017", 0.001", 108.309° remarks: * orbital elements for (1674)Groeneveld : Mean anomaly = 91.9876033032 deg Arg. of pericenter = 4.5015644695 deg Long. of node = 95.5498498801 deg Inclination = 2.6641485337 deg Eccentricity = 0.1271782998 Semimajor axis = 3.1935117296 AU Perihelion dist = 2.7873663374 AU Mag: H = 11.32, G = 0.15 Epoch of elements : MJD 60351.82827596 TDT (2024 Feb 11.8283) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#522023Apr24,2.75,2024,2,11,19.878619,-0.037624,-0.163503,5.944803,-1.278946,-0.005729,0.001715,0.000000,0.000000 142.9980,-13.4811,-114.63,-13.99,False TYC 5590-00779-1,14.81514374,-13.3801337,11.56,11.16,10.94,0.0,0,,14.83712796,-13.4811250,6.01,5.77,0,0,0 1674,Groeneveld,17.16,29.676,2.9645,0,0,1.209,-3.80,,1.6,0 0,91.8446,2024,2,11,4.5016,95.5498,2.6641,0.12718,3.19351,2.78737,11.32,5.0,0.15 1.170,0.0173,0.0014,108,0.0023,Known errors,0.81,0,-1,-1 20240211_0779-1,60138.17 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 13, 03:58 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org