IOTA/IOTA-ES occultation update for (1406) Komppa / HIP 104549 event on 2024 Aug 05, 23:41 UT Visible from Summary ------- On 2024 Aug 05 UT, the 24.9420349424804 km diameter asteroid (1406) Komppa will occult a 7.9 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 7.18 mag to 15.09 mag (the magnitude of the asteroid) for at most 2.000 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: 97 * date and approx. time of event: 2024 Aug 05, 23:32 - 2024 Aug 05, 23:49 * geocentric midpoint of event [JD]: 2460528.48690479 * magnitude of target star: 7.91 * magnitude drop [mag]: 7.18 * estimated maximum duration [s]: 2.000 * Moon: 2 % sunlit, 162° distance * Sun: 173° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 25 * 1 sigma uncertainty interval [path widths]: +/- 0.38 * 1 sigma uncertainty interval [seconds]: +/- 1.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.014, +/- 0.008) * 1 sigma uncertainty ellipse (major, minor, PA): (0.016", 0.002", 62°) * approx speed of asteroid's shadow [km/s]: 12.5406 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of HIP 104549 by 1406 Komppa on 2024 Aug 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 - 87 0 0 - 8 38 26 23 49 31.9 1 113 -1 - 8 30 57 - 8 45 54 - 8 25 19 - 8 51 32 .... - 86 0 0 - 9 4 19 23 49 31.6 2 113 -2 - 8 56 51 - 9 11 47 - 8 51 13 - 9 17 25 0.16 - 85 0 0 - 9 30 9 23 49 31.2 3 113 -4 - 9 22 41 - 9 37 37 - 9 17 3 - 9 43 15 0.15 - 84 0 0 - 9 55 55 23 49 30.6 4 113 -5 - 9 48 27 -10 3 24 - 9 42 50 -10 9 1 0.15 - 83 0 0 -10 21 37 23 49 29.8 5 113 -6 -10 14 9 -10 29 5 -10 8 32 -10 34 43 0.14 - 82 0 0 -10 47 14 23 49 28.8 6 112 -7 -10 39 46 -10 54 42 -10 34 9 -11 0 19 0.14 - 81 0 0 -11 12 45 23 49 27.7 7 112 -8 -11 5 17 -11 20 12 -10 59 40 -11 25 50 0.14 - 80 0 0 -11 38 9 23 49 26.3 8 112 -9 -11 30 42 -11 45 37 -11 25 5 -11 51 14 0.14 - 79 0 0 -12 3 27 23 49 24.9 10 112 -10 -11 56 0 -12 10 54 -11 50 23 -12 16 32 0.14 - 78 0 0 -12 28 37 23 49 23.2 11 112 -11 -12 21 10 -12 36 4 -12 15 34 -12 41 41 0.14 - 77 0 0 -12 53 39 23 49 21.4 12 111 -12 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6 -11 37 15 0.15 93 0 0 -10 58 46 23 32 53.6 10 248 -8 -10 51 18 -11 6 14 -10 45 41 -11 11 51 0.15 94 0 0 -10 33 16 23 32 52.0 9 248 -7 -10 25 48 -10 40 44 -10 20 11 -10 46 21 0.15 95 0 0 -10 7 40 23 32 50.5 8 248 -6 -10 0 12 -10 15 8 - 9 54 35 -10 20 46 0.15 96 0 0 - 9 42 0 23 32 49.2 7 248 -5 - 9 34 32 - 9 49 28 - 9 28 54 - 9 55 5 0.16 97 0 0 - 9 16 15 23 32 48.1 6 247 -4 - 9 8 47 - 9 23 43 - 9 3 9 - 9 29 21 0.16 98 0 0 - 8 50 27 23 32 47.1 5 247 -3 - 8 42 59 - 8 57 55 - 8 37 21 - 9 3 33 0.17 99 0 0 - 8 24 36 23 32 46.4 4 247 -2 - 8 17 8 - 8 32 4 - 8 11 30 - 8 37 42 0.18 100 0 0 - 7 58 43 23 32 45.8 3 247 -1 - 7 51 15 - 8 6 11 - 7 45 37 - 8 11 49 0.20 101 0 0 - 7 32 48 23 32 45.3 2 247 0 - 7 25 20 - 7 40 16 - 7 19 42 - 7 45 54 0.24 102 0 0 - 7 6 52 23 32 45.1 1 247 1 - 6 59 24 - 7 14 21 - 6 53 47 - 7 19 58 0.39 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: HIP 104549 * constellation : Capricornus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 21 10 40.8433 DE: -23 18 44.037 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 21 10 40.8433 DE: -23 18 44.039 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 7.9 * B mag [mag]: 8.2 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1406) Komppa asteroid class: Barbarian approx. diameter [km]: 25 approx. diameter ["]: 0.020 distance from Earth [AU]: 1.73680 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#60 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): 0.016", 0.002", 62.036° remarks: * orbital elements for (1406)Komppa : Mean anomaly = 264.1974574186 deg Arg. of pericenter = 86.5558931532 deg Long. of node = 333.0209258397 deg Inclination = 12.4270337074 deg Eccentricity = 0.0971247823 Semimajor axis = 2.6956008057 AU Perihelion dist = 2.4337911642 AU Mag: H = 11.42, G = 0.15 Epoch of elements : MJD 60527.98690487 TDT (2024 Aug 05.9869) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#602023Apr24,2.00,2024,8,5,23.685715,0.001845,-0.141453,-7.077614,-0.097362,-0.000134,0.000642,0.000001,0.000000 7.7348,-23.2108,-173.80,16.62,False HIP 104549,21.17801202,-23.3122325,8.21,7.91,7.75,0.1,0,,21.20207192,-23.2108460,7.18,6.89,0,0,0 1406,Komppa,15.09,25.068,1.7368,0,0,-2.599,-0.49,,1.4,0 0,263.9777,2024,8,5,86.5559,333.0209,12.4270,0.09712,2.69560,2.43379,11.42,5.0,0.15 1.377,0.0160,0.0019,62,0.0075,Known errors,0.89,0,-1,-1 20240805_104549,60140.23 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 05:37 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org