IOTA/IOTA-ES occultation update for (1705) Tapio / TYC 5603-00877-1 event on 2024 Sep 14, 09:52 UT Visible from Summary ------- On 2024 Sep 14 UT, the 11.2203701360538 km diameter asteroid (1705) Tapio will occult a 10.4 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 7.67 mag to 18.02 mag (the magnitude of the asteroid) for at most 0.370 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 Sep 14, 09:48 - 2024 Sep 14, 09:55 * geocentric midpoint of event [JD]: 2460567.91121888 * magnitude of target star: 10.35 * magnitude drop [mag]: 7.67 * estimated maximum duration [s]: 0.370 * Moon: 82 % sunlit, 68° distance * Sun: 62° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 13 * 1 sigma uncertainty interval [path widths]: +/- 0.40 * 1 sigma uncertainty interval [seconds]: +/- 0.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.009, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.009", 0.002", 97°) * approx speed of asteroid's shadow [km/s]: 30.7690 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5603-00877-1 by 1705 Tapio on 2024 Sep 14 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 1 0 0 -10 33 28 9 49 3.3 1 103 57 -10 37 1 -10 29 55 -10 39 50 -10 27 5 .... 2 0 0 -10 47 27 9 49 3.4 2 102 57 -10 51 0 -10 43 54 -10 53 50 -10 41 4 0.42 3 0 0 -11 1 46 9 49 3.6 3 102 58 -11 5 20 -10 58 13 -11 8 10 -10 55 23 0.45 4 0 0 -11 16 26 9 49 3.8 4 102 59 -11 20 0 -11 12 52 -11 22 51 -11 10 2 0.46 5 0 0 -11 31 26 9 49 4.1 5 102 60 -11 35 0 -11 27 52 -11 37 51 -11 25 1 0.47 6 0 0 -11 46 45 9 49 4.5 6 102 61 -11 50 19 -11 43 11 -11 53 10 -11 40 20 0.48 7 0 0 -12 2 23 9 49 5.0 7 101 61 -12 5 58 -11 58 49 -12 8 49 -11 55 58 0.48 8 0 0 -12 18 21 9 49 5.5 8 101 62 -12 21 56 -12 14 46 -12 24 47 -12 11 55 0.48 9 0 0 -12 34 37 9 49 6.1 9 101 63 -12 38 13 -12 31 2 -12 41 4 -12 28 10 0.48 10 0 0 -12 51 12 9 49 6.8 10 101 63 -12 54 48 -12 47 36 -12 57 40 -12 44 45 0.49 11 0 0 -13 8 5 9 49 7.6 11 101 64 -13 11 41 -13 4 29 -13 14 33 -13 1 37 0.49 12 0 0 -13 25 15 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0 -42 34 3 9 55 13.4 5 257 -45 -42 37 37 -42 30 29 -42 40 28 -42 27 38 0.56 -173 0 0 -42 21 55 9 55 13.7 4 257 -46 -42 25 29 -42 18 20 -42 28 20 -42 15 29 0.57 -172 0 0 -42 9 29 9 55 13.9 3 256 -46 -42 13 4 -42 5 54 -42 15 55 -42 3 3 0.59 -171 0 0 -41 56 47 9 55 14.0 2 255 -47 -42 0 22 -41 53 12 -42 3 14 -41 50 21 0.62 -170 0 0 -41 43 48 9 55 14.1 2 255 -48 -41 47 24 -41 40 13 -41 50 15 -41 37 21 0.68 -169 0 0 -41 30 32 9 55 14.2 1 254 -48 -41 34 8 -41 26 57 -41 37 0 -41 24 5 0.85 -168 0 0 -41 17 0 9 55 14.2 0 253 -49 -41 20 36 -41 13 24 -41 23 29 -41 10 32 4.02 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: TYC 5603-00877-1 * constellation : Libra * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 15 32 54.4823 DE: -12 30 45.754 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 15 32 54.4816 DE: -12 30 45.752 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.4 * B mag [mag]: 10.8 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1705) Tapio asteroid class: approx. diameter [km]: 11 approx. diameter ["]: 0.006 distance from Earth [AU]: 2.39400 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#55 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): 0.009", 0.002", 97.405° remarks: * orbital elements for (1705)Tapio : Mean anomaly = 301.4602593262 deg Arg. of pericenter = 156.4334218685 deg Long. of node = 188.5782441045 deg Inclination = 7.7109714361 deg Eccentricity = 0.2448790511 Semimajor axis = 2.2997751084 AU Perihelion dist = 1.7366083621 AU Mag: H = 13.34, G = 0.15 Epoch of elements : MJD 60567.41121875 TDT (2024 Sep 14.4112) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#552023Apr24,0.37,2024,9,14,9.869253,-0.119757,-0.428287,16.705403,-4.747351,0.004611,-0.000837,-0.000001,0.000000 91.6571,-12.5955,30.82,3.14,False TYC 5603-00877-1,15.54846734,-12.5127095,10.78,10.35,10.12,0.1,0,,15.57098047,-12.5955333,7.67,7.45,0,0,0 1705,Tapio,18.02,11.394,2.3940,0,0,4.193,-17.44,,0.8,0 0,301.3440,2024,9,14,156.4334,188.5782,7.7110,0.24488,2.29978,1.73661,13.34,5.0,0.15 1.398,0.0093,0.0022,97,0.0026,Known errors,0.85,0,-1,-1 20240914_0877-1,60140.56 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 13:28 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org