IOTA/IOTA-ES occultation update for (1366) Piccolo / UCAC4 449-001061 event on 2024 Sep 11, 19:33 UT Visible from Summary ------- On 2024 Sep 11 UT, the 27.843 km diameter asteroid (1366) Piccolo will occult a 11.2 mag star in the constellation Cetus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 3.05 mag to 14.13 mag (the magnitude of the asteroid) for at most 2.950 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 11, 19:22 - 2024 Sep 11, 19:44 * geocentric midpoint of event [JD]: 2460565.31482296 * magnitude of target star: 11.15 * magnitude drop [mag]: 3.05 * estimated maximum duration [s]: 2.950 * Moon: 55 % sunlit, 105° distance * Sun: 157° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 29 * 1 sigma uncertainty interval [path widths]: +/- 0.40 * 1 sigma uncertainty interval [seconds]: +/- 2.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.019, +/- 0.012) * 1 sigma uncertainty ellipse (major, minor, PA): (0.023", 0.002", 57°) * approx speed of asteroid's shadow [km/s]: 9.4370 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 449-001061 by 1366 Piccolo on 2024 Sep 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 - 4 0 0 -27 24 49 19 44 2.1 0 90 -22 -27 16 53 -27 32 45 -27 10 34 -27 39 4 .... - 3 0 0 -27 24 56 19 44 2.0 1 90 -23 -27 17 0 -27 32 52 -27 10 41 -27 39 11 0.21 - 2 0 0 -27 24 54 19 44 1.7 2 89 -24 -27 16 57 -27 32 50 -27 10 39 -27 39 9 0.26 - 1 0 0 -27 24 42 19 44 1.2 3 89 -25 -27 16 46 -27 32 39 -27 10 28 -27 38 58 0.28 0 0 0 -27 24 21 19 44 0.5 4 88 -26 -27 16 25 -27 32 18 -27 10 7 -27 38 37 0.29 1 0 0 -27 23 51 19 43 59.7 5 88 -27 -27 15 55 -27 31 48 -27 9 36 -27 38 7 0.30 2 0 0 -27 23 12 19 43 58.7 6 87 -27 -27 15 15 -27 31 8 -27 8 57 -27 37 27 0.30 3 0 0 -27 22 23 19 43 57.5 7 87 -28 -27 14 27 -27 30 20 -27 8 8 -27 36 39 0.30 4 0 0 -27 21 25 19 43 56.2 7 86 -29 -27 13 29 -27 29 22 -27 7 10 -27 35 41 0.31 5 0 0 -27 20 18 19 43 54.7 8 86 -30 -27 12 22 -27 28 15 -27 6 3 -27 34 34 0.31 6 0 0 -27 19 2 19 43 53.0 9 86 -31 -27 11 6 -27 26 59 -27 4 47 -27 33 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178 0 0 - 9 6 6 19 22 39.1 3 270 19 - 8 58 10 - 9 14 3 - 8 51 51 - 9 20 23 0.38 179 0 0 - 9 5 24 19 22 38.5 2 270 20 - 8 57 27 - 9 13 21 - 8 51 8 - 9 19 40 0.41 180 0 0 - 9 4 51 19 22 38.2 1 270 21 - 8 56 54 - 9 12 48 - 8 50 36 - 9 19 8 0.47 -179 0 0 - 9 4 29 19 22 38.1 0 270 22 - 8 56 32 - 9 12 26 - 8 50 14 - 9 18 45 1.52 Uncertainty in time = +/- 3 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 449-001061 * constellation : Cetus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 00 50 57.8162 DE: -00 22 53.151 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 00 50 57.8164 DE: -00 22 53.151 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.300) * V mag [mag]: 11.2 * B mag [mag]: 11.6 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1366) Piccolo asteroid class: approx. diameter [km]: 28 approx. diameter ["]: 0.023 distance from Earth [AU]: 1.65790 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#61 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): 0.023", 0.002", 57.217° remarks: * orbital elements for (1366)Piccolo : Mean anomaly = 43.3173006920 deg Arg. of pericenter = 283.0969086880 deg Long. of node = 24.0831383535 deg Inclination = 9.4655944955 deg Eccentricity = 0.1387549124 Semimajor axis = 2.8740610114 AU Perihelion dist = 2.4752709274 AU Mag: H = 10.36, G = 0.15 Epoch of elements : MJD 60564.81482275 TDT (2024 Sep 11.8148) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#612023Apr24,2.95,2024,9,11,19.555751,0.048805,-0.307281,-5.259266,-0.843772,-0.002127,-0.000366,0.000001,0.000001 88.4155,-0.2448,-114.25,4.14,False UCAC4 449-001061,0.84939339,-0.3814309,11.55,11.15,10.93,0.0,0,,0.87076228,-0.2448118,3.04,2.82,0,0,0 1366,Piccolo,14.13,27.843,1.6579,0,0,-1.860,-4.47,,2.2,0 0,43.1525,2024,9,11,283.0969,24.0831,9.4656,0.13875,2.87406,2.47527,10.35,5.0,0.15 1.397,0.0227,0.0016,57,0.0092,Known errors,1.21,0,-1,-1 20240911_001061,60140.56 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 13:20 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org