IOTA/IOTA-ES occultation update for (3815) Konig / UCAC4 527-016117 event on 2024 Apr 05, 13:07 UT Visible from Summary ------- On 2024 Apr 05 UT, the 21.391 km diameter asteroid (3815) Konig will occult a 12.0 mag star in the constellation Taurus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.86 mag to 17.85 mag (the magnitude of the asteroid) for at most 0.830 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 Apr 05, 13:03 - 2024 Apr 05, 13:11 * geocentric midpoint of event [JD]: 2460406.04670266 * magnitude of target star: 11.99 * magnitude drop [mag]: 5.86 * estimated maximum duration [s]: 0.830 * Moon: 15 % sunlit, 116° distance * Sun: 71° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 21 * 1 sigma uncertainty interval [path widths]: +/- 0.28 * 1 sigma uncertainty interval [seconds]: +/- 0.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.010, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.010", 0.002", 92°) * approx speed of asteroid's shadow [km/s]: 25.9145 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 527-016117 by 3815 Konig on 2024 Apr 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 - 31 0 0 - 7 11 49 13 3 9.1 0 75 69 - 7 17 50 - 7 5 48 - 7 21 12 - 7 2 26 .... - 30 0 0 - 6 55 13 13 3 9.2 1 74 70 - 7 1 15 - 6 49 12 - 7 4 36 - 6 45 50 -0.08 - 29 0 0 - 6 38 27 13 3 9.3 2 74 71 - 6 44 29 - 6 32 25 - 6 47 50 - 6 29 4 -0.05 - 28 0 0 - 6 21 31 13 3 9.6 3 74 72 - 6 27 33 - 6 15 30 - 6 30 55 - 6 12 8 -0.04 - 27 0 0 - 6 4 27 13 3 9.9 5 74 73 - 6 10 29 - 5 58 24 - 6 13 51 - 5 55 2 -0.04 - 26 0 0 - 5 47 13 13 3 10.3 6 74 74 - 5 53 15 - 5 41 10 - 5 56 37 - 5 37 48 -0.03 - 25 0 0 - 5 29 50 13 3 10.7 7 74 75 - 5 35 53 - 5 23 48 - 5 39 15 - 5 20 25 -0.03 - 24 0 0 - 5 12 19 13 3 11.3 8 74 75 - 5 18 22 - 5 6 16 - 5 21 44 - 5 2 54 -0.03 - 23 0 0 - 4 54 40 13 3 11.9 9 74 76 - 5 0 43 - 4 48 37 - 5 4 6 - 4 45 15 -0.03 - 22 0 0 - 4 36 54 13 3 12.6 10 74 77 - 4 42 57 - 4 30 51 - 4 46 20 - 4 27 28 -0.03 - 21 0 0 - 4 19 0 13 3 13.4 11 74 78 - 4 25 4 - 4 12 57 - 4 28 26 - 4 9 34 -0.03 - 20 0 0 - 4 1 0 13 3 14.3 12 74 79 - 4 7 3 - 3 54 56 - 4 10 26 - 3 51 33 -0.03 - 19 0 0 - 3 42 52 13 3 15.3 13 73 79 - 3 48 56 - 3 36 49 - 3 52 19 - 3 33 26 -0.03 - 18 0 0 - 3 24 39 13 3 16.3 14 73 80 - 3 30 43 - 3 18 35 - 3 34 6 - 3 15 12 -0.02 - 17 0 0 - 3 6 20 13 3 17.4 15 73 80 - 3 12 24 - 3 0 16 - 3 15 47 - 2 56 53 -0.02 - 16 0 0 - 2 47 56 13 3 18.6 16 73 81 - 2 54 0 - 2 41 51 - 2 57 23 - 2 38 28 -0.02 - 15 0 0 - 2 29 26 13 3 19.9 17 73 81 - 2 35 31 - 2 23 22 - 2 38 54 - 2 19 59 -0.02 - 14 0 0 - 2 10 52 13 3 21.3 18 73 81 - 2 16 57 - 2 4 48 - 2 20 20 - 2 1 25 -0.02 - 13 0 0 - 1 52 14 13 3 22.7 19 73 81 - 1 58 19 - 1 46 9 - 2 1 42 - 1 42 46 -0.02 - 12 0 0 - 1 33 32 13 3 24.2 20 73 81 - 1 39 37 - 1 27 27 - 1 43 0 - 1 24 4 -0.02 - 11 0 0 - 1 14 47 13 3 25.8 21 73 81 - 1 20 51 - 1 8 42 - 1 24 15 - 1 5 18 -0.02 - 10 0 0 - 0 55 58 13 3 27.5 22 73 81 - 1 2 3 - 0 49 53 - 1 5 26 - 0 46 30 -0.02 - 9 0 0 - 0 37 7 13 3 29.3 23 73 81 - 0 43 12 - 0 31 2 - 0 46 36 - 0 27 39 -0.02 - 8 0 0 - 0 18 14 13 3 31.1 24 73 80 - 0 24 19 - 0 12 9 - 0 27 43 - 0 8 46 -0.02 - 7 0 0 0 0 41 13 3 33.0 25 73 80 - 0 5 24 0 6 46 - 0 8 48 0 10 9 -0.02 - 6 0 0 0 19 37 13 3 35.0 27 73 79 0 13 32 0 25 42 0 10 8 0 29 5 -0.02 - 5 0 0 0 38 34 13 3 37.0 28 73 78 0 32 29 0 44 39 0 29 5 0 48 2 -0.02 - 4 0 0 0 57 31 13 3 39.2 29 73 78 0 51 26 1 3 36 0 48 3 1 7 0 -0.02 - 3 0 0 1 16 29 13 3 41.4 30 73 77 1 10 24 1 22 34 1 7 0 1 25 57 -0.02 - 2 0 0 1 35 26 13 3 43.7 31 73 76 1 29 21 1 41 31 1 25 57 1 44 54 -0.02 - 1 0 0 1 54 22 13 3 46.0 32 73 75 1 48 17 2 0 27 1 44 53 2 3 51 -0.02 - 0 0 0 2 13 17 13 3 48.5 33 73 74 2 7 12 2 19 22 2 3 49 2 22 45 -0.02 1 0 0 2 32 10 13 3 51.0 34 73 73 2 26 5 2 38 15 2 22 42 2 41 39 -0.02 2 0 0 2 51 2 13 3 53.5 35 73 72 2 44 57 2 57 6 2 41 33 3 0 30 -0.02 3 0 0 3 9 50 13 3 56.2 36 73 71 3 3 45 3 15 55 3 0 22 3 19 18 -0.02 4 0 0 3 28 36 13 3 58.9 37 73 70 3 22 31 3 34 41 3 19 8 3 38 4 -0.02 5 0 0 3 47 18 13 4 1.6 38 74 70 3 41 14 3 53 23 3 37 50 3 56 46 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125 0 0 13 58 43 13 11 3.0 22 281 -47 13 52 48 14 4 38 13 49 30 14 7 56 -0.02 126 0 0 13 46 46 13 11 4.6 21 281 -48 13 40 51 13 52 42 13 37 33 13 56 0 -0.02 127 0 0 13 34 35 13 11 6.1 20 282 -49 13 28 39 13 40 30 13 25 21 13 43 49 -0.02 128 0 0 13 22 8 13 11 7.5 19 282 -50 13 16 12 13 28 4 13 12 53 13 31 22 -0.02 129 0 0 13 9 27 13 11 8.9 18 282 -51 13 3 31 13 15 23 13 0 12 13 18 42 -0.02 130 0 0 12 56 31 13 11 10.2 17 282 -52 12 50 35 13 2 28 12 47 16 13 5 47 -0.02 131 0 0 12 43 22 13 11 11.5 16 282 -53 12 37 25 12 49 19 12 34 6 12 52 38 -0.02 132 0 0 12 29 58 13 11 12.6 15 283 -54 12 24 1 12 35 55 12 20 42 12 39 14 -0.02 133 0 0 12 16 21 13 11 13.7 14 283 -55 12 10 23 12 22 18 12 7 4 12 25 38 -0.02 134 0 0 12 2 30 13 11 14.8 13 283 -56 11 56 32 12 8 28 11 53 13 12 11 47 -0.02 135 0 0 11 48 26 13 11 15.7 12 283 -57 11 42 28 11 54 24 11 39 8 11 57 44 -0.02 136 0 0 11 34 9 13 11 16.6 11 283 -58 11 28 11 11 40 7 11 24 51 11 43 27 -0.03 137 0 0 11 19 39 13 11 17.4 10 284 -59 11 13 41 11 25 38 11 10 21 11 28 58 -0.03 138 0 0 11 4 57 13 11 18.1 9 284 -60 10 58 58 11 10 56 10 55 38 11 14 16 -0.03 139 0 0 10 50 2 13 11 18.8 8 284 -61 10 44 3 10 56 1 10 40 43 10 59 22 -0.03 140 0 0 10 34 55 13 11 19.4 7 284 -62 10 28 56 10 40 55 10 25 36 10 44 15 -0.03 141 0 0 10 19 37 13 11 19.9 6 284 -63 10 13 37 10 25 37 10 10 17 10 28 57 -0.03 142 0 0 10 4 7 13 11 20.3 5 285 -64 9 58 7 10 10 7 9 54 47 10 13 28 -0.04 143 0 0 9 48 26 13 11 20.7 4 285 -65 9 42 26 9 54 26 9 39 5 9 57 47 -0.04 144 0 0 9 32 34 13 11 20.9 3 285 -65 9 26 34 9 38 35 9 23 13 9 41 56 -0.05 145 0 0 9 16 32 13 11 21.1 2 285 -66 9 10 31 9 22 32 9 7 10 9 25 54 -0.07 146 0 0 9 0 19 13 11 21.2 1 285 -67 8 54 18 9 6 20 8 50 57 9 9 41 -0.12 147 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 8 49 57 .. .. .. 8 53 19 .... Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 14.3 Data for the target star ------------------------ * name: UCAC4 527-016117 * constellation : Taurus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 05 45 40.4174 DE: +15 13 19.516 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 05 45 40.4174 DE: +15 13 19.516 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 12.0 * B mag [mag]: 12.8 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3815) Konig asteroid class: approx. diameter [km]: 21 approx. diameter ["]: 0.011 distance from Earth [AU]: 2.74350 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#53 date of fit: 2023 Apr 27 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): 0.010", 0.002", 92.4° remarks: * orbital elements for (3815)Konig : Mean anomaly = 271.0842640837 deg Arg. of pericenter = 11.9779332005 deg Long. of node = 197.1628162006 deg Inclination = 8.6525919754 deg Eccentricity = 0.1063186095 Semimajor axis = 2.5692410759 AU Perihelion dist = 2.2960829371 AU Mag: H = 12.54, G = 0.15 Epoch of elements : MJD 60405.54670229 TDT (2024 Apr 05.5467) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#532023Apr27,0.83,2024,4,5,13.120864,-0.002258,0.012774,14.475261,2.100607,0.005389,-0.000141,-0.000001,0.000000 55.6229,15.2319,-16.18,6.39,False UCAC4 527-016117,5.76122710,15.2220879,12.77,11.99,11.57,0.0,0,,5.78417618,15.2318599,5.87,5.84,0,0,0 3815,Konig,17.85,21.391,2.7435,0,0,3.206,6.73,,1.0,0 0,270.9534,2024,4,5,11.9779,197.1628,8.6526,0.10632,2.56924,2.29608,12.55,5.0,0.15 1.279,0.0097,0.0025,92,0.0030,Known errors,1.33,0,-1,-1 20240405_016117,60139.28 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 14, 06:36 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org