IOTA/IOTA-ES occultation update for (1000) Piazzia / UCAC4-669-040993 event on 2023 Jan 19, 02:01 UT Visible from Canada, W USA Summary ------- On 2023 Jan 19 UT, the 50.7 km diameter asteroid (1000) Piazzia will occult a 12.5 mag star in the constellation Auriga for observers along a path across Canada, W USA. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.08 mag to 16.52 mag (the magnitude of the asteroid) for at most 3.310 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: 94 * date and approx. time of event: 2023 Jan 19, 01:54 - 2023 Jan 19, 02:06 * geocentric midpoint of event [JD]: 2459963.58355266 * magnitude of target star: 12.47 * magnitude drop [mag]: 4.08 * estimated maximum duration [s]: 3.310 * Moon: 11 % sunlit, 161° distance * Sun: 144° distance * rough path description: Canada, W USA The occultation path -------------------- * approximate projected width [km]: 57 * 1 sigma uncertainty interval [path widths]: +/- 0.46 * 1 sigma uncertainty interval [seconds]: +/- 1.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.015, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.015", 0.006", 100°) * approx speed of asteroid's shadow [km/s]: 15.3376 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4-669-040993 by 1000 Piazzia on 2023 Jan 19 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 ' " Longitude Longitude Longitude Longitude .. .. .. - 3 0 0 .. .. .... .. .. .. ... .. .. -149 48 0 ... .. .. -149 27 51 .... -149 8 23 - 2 0 0 2 6 28.1 1 46 29 -149 30 13 -148 46 39 -149 50 22 -148 26 48 .... -148 8 20 - 1 0 0 2 6 27.7 3 46 28 -148 29 53 -147 46 54 -148 49 45 -147 27 17 -0.44 -147 9 47 0 0 0 2 6 27.1 4 46 26 -147 31 4 -146 48 35 -147 50 41 -146 29 13 -0.46 -146 12 36 1 0 0 2 6 26.1 5 46 25 -146 33 39 -145 51 39 -146 53 3 -145 32 29 -0.47 Latitude Latitude Latitude Latitude -146 0 0 1 13 25 2 6 25.9 6 46 25 1 35 49 0 51 7 1 56 29 0 30 44 -0.51 -145 0 0 2 18 12 2 6 24.5 7 46 23 2 40 54 1 55 36 3 1 50 1 34 58 -0.47 -144 0 0 3 24 30 2 6 22.8 9 46 22 3 47 30 3 1 37 4 8 43 2 40 42 -0.47 -143 0 0 4 32 20 2 6 20.8 10 46 21 4 55 38 4 9 8 5 17 8 3 47 57 -0.48 -142 0 0 5 41 38 2 6 18.5 12 47 19 6 5 16 5 18 9 6 27 3 4 56 41 -0.48 -141 0 0 6 52 26 2 6 15.8 13 47 18 7 16 22 6 28 37 7 38 27 6 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-23 67 1 24 66 5 54 67 27 11 65 40 43 -0.52 53 0 0 65 56 40 1 55 19.1 31 309 -23 66 24 55 65 28 39 66 51 3 65 3 7 -0.52 54 0 0 65 18 8 1 55 15.9 30 310 -22 65 46 46 64 49 44 66 13 16 64 23 52 -0.52 55 0 0 64 37 52 1 55 12.7 29 311 -22 65 6 53 64 9 6 65 33 45 63 42 54 -0.52 56 0 0 63 55 49 1 55 9.4 29 312 -22 64 25 13 63 26 41 64 52 26 63 0 9 -0.52 57 0 0 63 11 55 1 55 6.1 28 313 -21 63 41 41 62 42 25 64 9 15 62 15 34 -0.52 58 0 0 62 26 6 1 55 2.7 27 314 -21 62 56 14 61 56 15 63 24 8 61 29 4 -0.52 59 0 0 61 38 18 1 54 59.3 26 315 -20 62 8 47 61 8 7 62 37 1 60 40 38 -0.52 60 0 0 60 48 30 1 54 55.9 25 316 -20 61 19 18 60 17 58 61 47 52 59 50 12 -0.52 61 0 0 59 56 36 1 54 52.5 24 317 -19 60 27 44 59 25 46 60 56 36 58 57 43 -0.53 62 0 0 59 2 35 1 54 49.1 23 318 -18 59 34 2 58 31 27 60 3 11 58 3 8 -0.53 63 0 0 58 6 25 1 54 45.7 22 319 -18 58 38 9 57 35 1 59 7 34 57 6 26 -0.53 64 0 0 57 8 4 1 54 42.3 21 320 -17 57 40 3 56 36 24 58 9 43 56 7 36 -0.53 65 0 0 56 7 30 1 54 39.0 20 321 -16 56 39 44 55 35 36 57 9 37 55 6 35 -0.53 66 0 0 55 4 43 1 54 35.8 19 322 -15 55 37 10 54 32 37 56 7 15 54 3 25 -0.53 67 0 0 53 59 43 1 54 32.7 17 323 -15 54 32 21 53 27 26 55 2 37 52 58 5 -0.53 68 0 0 52 52 31 1 54 29.6 16 323 -14 53 25 19 52 20 5 53 55 43 51 50 35 -0.53 69 0 0 51 43 9 1 54 26.7 15 324 -13 52 16 3 51 10 35 52 46 35 50 40 59 -0.54 70 0 0 50 31 37 1 54 24.0 14 325 -12 51 4 38 49 58 58 51 35 15 49 29 17 -0.54 71 0 0 49 18 1 1 54 21.4 12 326 -11 49 51 5 48 45 18 50 21 45 48 15 34 -0.55 72 0 0 48 2 23 1 54 19.0 11 327 -10 48 35 29 47 29 39 49 6 10 46 59 53 -0.55 73 0 0 46 44 49 1 54 16.9 9 327 -9 47 17 54 46 12 5 47 48 35 45 42 20 -0.56 74 0 0 45 25 24 1 54 15.0 8 328 -8 45 58 27 44 52 43 46 29 5 44 22 59 -0.57 75 0 0 44 4 15 1 54 13.4 6 329 -7 44 37 13 43 31 37 45 7 47 43 1 58 -0.59 76 0 0 42 41 28 1 54 12.2 5 330 -5 43 14 20 42 8 57 43 44 48 41 39 22 -0.62 77 0 0 41 17 12 1 54 11.2 3 330 -4 41 49 55 40 44 49 42 20 15 40 15 22 -0.68 78 0 0 39 51 35 1 54 10.6 2 331 -3 40 24 8 39 19 22 40 54 18 38 50 3 -0.87 79 0 0 38 24 47 1 54 10.4 0 331 -2 38 57 8 .. .. .. 39 27 7 .. .. .. -68.89 Uncertainty in time = +/- 2 secs Prediction of 2022 Dec 1.1 Data for the target star ------------------------ * name: UCAC4-669-040993 * constellation : Auriga * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 05 46 16.9050 DE: +43 40 21.085 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 05 46 16.9049 DE: +43 40 21.085 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 12.5 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1000) Piazzia asteroid class: approx. diameter [km]: 51 approx. diameter ["]: 0.023 distance from Earth [AU]: 2.98240 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#56 date of fit: 2022 Nov 22 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): 0.015", 0.006", 99.767° remarks: * orbital elements for (1000)Piazzia : Mean anomaly = 226.4583477044 deg Arg. of pericenter = 280.5176892319 deg Long. of node = 323.7127769039 deg Inclination = 20.5874136052 deg Eccentricity = 0.2580981254 Semimajor axis = 3.1691226660 AU Perihelion dist = 2.3511780468 AU Mag: H = 10.56, G = 0.15 Epoch of elements : MJD 59963.08402778 TDT (2023 Jan 19.0840) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#562022Nov22,3.31,2023,1,19,2.005264,-0.239490,0.392740,-7.390137,-4.508779,0.003188,-0.001756,0.000001,0.000000 -61.3005,43.6827,152.55,-20.42,False UCAC4-669-040993,5.77136249,43.6725236,0.00,12.47,0.00,0.0,0,,5.79942159,43.6826679,4.08,0.00,0,0,0 1000,Piazzia,16.52,50.7,2.9824,0,0,-2.007,-13.30,,3.2,0 0,226.4437,2023,1,19,280.5177,323.7128,20.5874,0.25810,3.16912,2.35118,10.64,5.0,0.15 1.459,0.0150,0.0057,100,0.0108,Known errors,-1.00,-1,-1,-1 20230119_040993,59914.09 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Dec 01, 02:14 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org