IOTA/IOTA-ES occultation update for (449) Hamburga / TYC 6828-01762-1 event on 2024 Oct 22, 10:23 UT Visible from Summary ------- On 2024 Oct 22 UT, the 73.3193551008465 km diameter asteroid (449) Hamburga will occult a 10.0 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 5.65 mag to 15.61 mag (the magnitude of the asteroid) for at most 2.270 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: 100 * date and approx. time of event: 2024 Oct 22, 10:20 - 2024 Oct 22, 10:27 * geocentric midpoint of event [JD]: 2460605.93333250 * magnitude of target star: 9.97 * magnitude drop [mag]: 5.65 * estimated maximum duration [s]: 2.270 * Moon: 70 % sunlit, 170° distance * Sun: 57° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 77 * 1 sigma uncertainty interval [path widths]: +/- 0.07 * 1 sigma uncertainty interval [seconds]: +/- 0.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.006, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.006", 0.002", 97°) * approx speed of asteroid's shadow [km/s]: 32.4226 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6828-01762-1 by 449 Hamburga on 2024 Oct 22 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 - 16 0 0 -13 32 16 10 20 51.9 0 115 54 -13 55 22 .. .. .. -13 58 40 .. .. .. .... - 15 0 0 -13 59 38 10 20 52.0 1 115 55 -14 22 45 -13 36 35 -14 26 3 -13 33 18 0.30 - 14 0 0 -14 27 4 10 20 52.1 2 114 56 -14 50 12 -14 4 0 -14 53 30 -14 0 43 0.31 - 13 0 0 -14 54 33 10 20 52.3 3 114 57 -15 17 41 -14 31 28 -15 21 0 -14 28 10 0.31 - 12 0 0 -15 22 4 10 20 52.5 4 114 58 -15 45 13 -14 58 58 -15 48 32 -14 55 41 0.31 - 11 0 0 -15 49 37 10 20 52.9 5 114 59 -16 12 47 -15 26 30 -16 16 6 -15 23 13 0.31 - 10 0 0 -16 17 11 10 20 53.3 7 113 60 -16 40 21 -15 54 3 -16 43 40 -15 50 45 0.31 - 9 0 0 -16 44 44 10 20 53.7 8 113 61 -17 7 55 -16 21 37 -17 11 14 -16 18 19 0.31 - 8 0 0 -17 12 17 10 20 54.3 9 113 61 -17 35 29 -16 49 9 -17 38 48 -16 45 51 0.31 - 7 0 0 -17 39 49 10 20 54.9 10 112 62 -18 3 1 -17 16 40 -18 6 20 -17 13 22 0.31 - 6 0 0 -18 7 18 10 20 55.6 11 112 63 -18 30 30 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55 46 -22 2 56 0.34 167 0 0 -22 2 51 10 27 4.8 10 248 -44 -22 26 0 -21 39 45 -22 29 19 -21 36 27 0.34 168 0 0 -21 36 14 10 27 5.4 9 247 -45 -21 59 24 -21 13 8 -22 2 43 -21 9 50 0.35 169 0 0 -21 9 29 10 27 6.0 8 247 -46 -21 32 39 -20 46 22 -21 35 58 -20 43 4 0.35 170 0 0 -20 42 37 10 27 6.5 7 247 -47 -21 5 47 -20 19 29 -21 9 6 -20 16 11 0.36 171 0 0 -20 15 37 10 27 6.9 6 246 -48 -20 38 48 -19 52 29 -20 42 7 -19 49 11 0.37 172 0 0 -19 48 32 10 27 7.2 5 246 -49 -20 11 43 -19 25 24 -20 15 2 -19 22 6 0.38 173 0 0 -19 21 21 10 27 7.5 4 246 -50 -19 44 32 -18 58 12 -19 47 51 -18 54 54 0.40 174 0 0 -18 54 5 10 27 7.8 3 245 -51 -19 17 16 -18 30 57 -19 20 35 -18 27 39 0.43 175 0 0 -18 26 45 10 27 7.9 2 245 -52 -18 49 57 -18 3 37 -18 53 16 -18 0 19 0.50 176 0 0 -17 59 22 10 27 8.0 1 245 -53 -18 22 33 -17 36 14 -18 25 52 -17 32 56 0.77 Uncertainty in time = +/- 0 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 6828-01762-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 44 57.4689 DE: -24 12 31.324 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 44 57.4687 DE: -24 12 31.324 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.0 * B mag [mag]: 10.7 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (449) Hamburga asteroid class: approx. diameter [km]: 73 approx. diameter ["]: 0.030 distance from Earth [AU]: 3.31800 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#58 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): 0.006", 0.002", 96.524° remarks: * orbital elements for (449)Hamburga : Mean anomaly = 137.3244355802 deg Arg. of pericenter = 48.7457966256 deg Long. of node = 85.7661009767 deg Inclination = 3.0792933322 deg Eccentricity = 0.1734034139 Semimajor axis = 2.5509928030 AU Perihelion dist = 2.1086419421 AU Mag: H = 9.80, G = 0.15 Epoch of elements : MJD 60605.43333229 TDT (2024 Oct 22.4333) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#582023Apr24,2.27,2024,10,22,10.399980,-0.012003,-0.292540,18.285447,-0.734558,0.004923,-0.000163,-0.000001,0.000000 79.2702,-24.2198,20.10,-11.30,False TYC 6828-01762-1,17.74929694,-24.2087012,10.71,9.97,9.57,0.1,0,,17.77432979,-24.2198407,5.65,5.60,0,0,0 449,Hamburga,15.61,73.560,3.3180,0,0,3.543,-1.94,,4.0,0 0,137.2196,2024,10,22,48.7458,85.7661,3.0793,0.17340,2.55099,2.10864,9.80,5.0,0.15 1.071,0.0063,0.0021,97,0.0022,Known errors,0.68,0,-1,-1 20241022_1762-1,60140.65 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:39 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org