IOTA/IOTA-ES occultation update for (2) Pallas / TYC 0182-00388-1 event on 2023 Apr 23, 00:36 UT Visible from South America Summary ------- On 2023 Apr 23 UT, the 532 km diameter asteroid (2) Pallas will occult a 11.2 mag star in the constellation Canis Minor for observers along a path across South America. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.09 mag to 8.53 mag (the magnitude of the asteroid) for at most 18.770 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: 100 * date and approx. time of event: 2023 Apr 23, 00:33 - 2023 Apr 23, 00:39 * geocentric midpoint of event [JD]: 2460057.52520083 * magnitude of target star: 11.16 * magnitude drop [mag]: 0.09 * estimated maximum duration [s]: 18.770 * Moon: 9 % sunlit, 53° distance * Sun: 84° distance * rough path description: South America Additional comments ------------------- low mag drop The occultation path -------------------- * approximate projected width [km]: 709 * 1 sigma uncertainty interval [path widths]: +/- 0.04 * 1 sigma uncertainty interval [seconds]: +/- 1.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.034, +/- 0.014) * 1 sigma uncertainty ellipse (major, minor, PA): (0.035", 0.013", 78°) * approx speed of asteroid's shadow [km/s]: 28.3415 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0182-00388-1 by 2 Pallas on 2023 Apr 23 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 170 0 0 .. .. .... .. .. .. .. .. .. .. .. .. -67 22 17 .. .. .. -67 6 18 .... 171 0 0 -70 28 9 0 33 29.5 0 84 7 .. .. .. -67 20 10 .. .. .. -67 4 10 .... 172 0 0 -70 26 0 0 33 29.5 0 83 7 -73 43 52 -67 17 48 -74 1 40 -67 1 47 0.45 173 0 0 -70 23 37 0 33 29.5 1 82 7 -73 41 45 -67 15 11 -73 59 34 -66 59 9 0.64 174 0 0 -70 20 59 0 33 29.6 1 81 7 -73 39 26 -67 12 18 -73 57 17 -66 56 15 0.71 175 0 0 -70 18 8 0 33 29.6 1 80 7 -73 36 54 -67 9 10 -73 54 46 -66 53 6 0.75 176 0 0 -70 15 2 0 33 29.6 2 79 7 -73 34 9 -67 5 47 -73 52 4 -66 49 40 0.77 177 0 0 -70 11 42 0 33 29.7 2 79 7 -73 31 11 -67 2 7 -73 49 8 -66 45 59 0.79 178 0 0 -70 8 7 0 33 29.8 2 78 7 -73 28 1 -66 58 12 -73 46 0 -66 42 2 0.80 179 0 0 -70 4 18 0 33 29.9 3 77 7 -73 24 37 -66 54 0 -73 42 39 -66 37 49 0.81 -180 0 0 -70 0 14 0 33 30.0 3 76 7 -73 21 1 -66 49 33 -73 39 5 -66 33 20 0.82 -179 0 0 -69 55 55 0 33 30.1 4 75 8 -73 17 11 -66 44 49 -73 35 18 -66 28 34 0.82 -178 0 0 -69 51 20 0 33 30.2 4 74 8 -73 13 7 -66 39 49 -73 31 17 -66 23 31 0.83 -177 0 0 -69 46 31 0 33 30.3 4 73 8 -73 8 50 -66 34 32 -73 27 3 -66 18 12 0.83 -176 0 0 -69 41 26 0 33 30.5 5 72 8 -73 4 18 -66 28 58 -73 22 35 -66 12 36 0.83 -175 0 0 -69 36 5 0 33 30.6 5 71 8 -72 59 33 -66 23 7 -73 17 53 -66 6 43 0.84 -174 0 0 -69 30 29 0 33 30.8 5 70 8 -72 54 33 -66 16 59 -73 12 57 -66 0 32 0.84 -173 0 0 -69 24 36 0 33 31.0 6 69 8 -72 49 19 -66 10 34 -73 7 46 -65 54 4 0.84 -172 0 0 -69 18 27 0 33 31.2 6 68 8 -72 43 50 -66 3 51 -73 2 21 -65 47 19 0.84 -171 0 0 -69 12 1 0 33 31.4 6 67 8 -72 38 6 -65 56 50 -72 56 41 -65 40 15 0.84 -170 0 0 -69 5 19 0 33 31.6 7 66 8 -72 32 7 -65 49 31 -72 50 46 -65 32 53 0.85 -169 0 0 -68 58 19 0 33 31.8 7 65 8 -72 25 52 -65 41 54 -72 44 35 -65 25 13 0.85 -168 0 0 -68 51 3 0 33 32.1 8 64 8 -72 19 21 -65 33 58 -72 38 9 -65 17 14 0.85 -167 0 0 -68 43 28 0 33 32.4 8 64 8 -72 12 35 -65 25 43 -72 31 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38 33.2 26 280 -57 -19 23 12 -12 41 0 -19 41 49 -12 24 22 0.91 - 43 0 0 -15 40 33 0 38 35.5 25 280 -58 -19 6 23 -12 25 26 -19 24 56 -12 8 51 0.91 - 42 0 0 -15 25 4 0 38 37.7 25 279 -59 -18 50 16 -12 10 30 -19 8 45 -11 53 58 0.91 - 41 0 0 -15 10 15 0 38 39.9 24 279 -60 -18 34 50 -11 56 13 -18 53 15 -11 39 43 0.91 - 40 0 0 -14 56 6 0 38 41.9 23 279 -61 -18 20 5 -11 42 35 -18 38 27 -11 26 8 0.91 - 39 0 0 -14 42 38 0 38 43.9 22 278 -62 -18 6 2 -11 29 35 -18 24 21 -11 13 10 0.91 - 38 0 0 -14 29 49 0 38 45.8 21 278 -63 -17 52 41 -11 17 14 -18 10 57 -11 0 52 0.91 - 37 0 0 -14 17 41 0 38 47.7 20 277 -64 -17 40 2 -11 5 32 -17 58 15 -10 49 12 0.91 - 36 0 0 -14 6 13 0 38 49.4 19 277 -65 -17 28 5 -10 54 29 -17 46 15 -10 38 11 0.91 - 35 0 0 -13 55 25 0 38 51.0 18 277 -66 -17 16 50 -10 44 5 -17 34 57 -10 27 49 0.91 - 34 0 0 -13 45 18 0 38 52.6 17 276 -67 -17 6 16 -10 34 20 -17 24 21 -10 18 5 0.91 - 33 0 0 -13 35 50 0 38 54.1 16 276 -68 -16 56 25 -10 25 14 -17 14 27 -10 9 1 0.92 - 32 0 0 -13 27 3 0 38 55.5 15 276 -69 -16 47 15 -10 16 46 -17 5 15 -10 0 35 0.92 - 31 0 0 -13 18 57 0 38 56.8 14 275 -70 -16 38 47 -10 8 58 -16 56 46 - 9 52 48 0.92 - 30 0 0 -13 11 30 0 38 58.0 13 275 -71 -16 31 2 -10 1 48 -16 48 58 - 9 45 39 0.92 - 29 0 0 -13 4 44 0 38 59.2 12 275 -72 -16 23 58 - 9 55 17 -16 41 53 - 9 39 10 0.92 - 28 0 0 -12 58 39 0 39 0.2 11 275 -73 -16 17 36 - 9 49 25 -16 35 29 - 9 33 19 0.93 - 27 0 0 -12 53 13 0 39 1.2 10 274 -74 -16 11 56 - 9 44 12 -16 29 48 - 9 28 7 0.93 - 26 0 0 -12 48 28 0 39 2.1 9 274 -74 -16 6 57 - 9 39 38 -16 24 48 - 9 23 34 0.93 - 25 0 0 -12 44 23 0 39 2.9 8 274 -75 -16 2 41 - 9 35 43 -16 20 31 - 9 19 39 0.94 - 24 0 0 -12 40 58 0 39 3.6 7 274 -76 -15 59 6 - 9 32 26 -16 16 55 - 9 16 23 0.94 - 23 0 0 -12 38 13 0 39 4.2 6 273 -77 -15 56 13 - 9 29 48 -16 14 1 - 9 13 46 0.95 - 22 0 0 -12 36 8 0 39 4.7 5 273 -78 -15 54 2 - 9 27 49 -16 11 49 - 9 11 47 0.96 - 21 0 0 -12 34 44 0 39 5.2 5 273 -79 -15 52 33 - 9 26 28 -16 10 19 - 9 10 27 0.98 - 20 0 0 -12 33 59 0 39 5.5 4 273 -80 -15 51 45 - 9 25 47 -16 9 31 - 9 9 45 1.01 - 19 0 0 -12 33 54 0 39 5.8 3 273 -81 -15 51 38 - 9 25 43 -16 9 25 - 9 9 42 1.05 - 18 0 0 -12 34 30 0 39 6.0 2 272 -82 -15 52 13 - 9 26 19 -16 10 0 - 9 10 18 1.15 - 17 0 0 -12 35 45 0 39 6.1 1 272 -83 -15 53 30 - 9 27 33 -16 11 16 - 9 11 31 1.59 Uncertainty in time = +/- 2 secs Prediction of 2023 Mar 1.1 Data for the target star ------------------------ * name: TYC 0182-00388-1 * constellation : Canis Minor * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 07 37 15.7170 DE: +01 56 26.339 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 07 37 15.7170 DE: +01 56 26.339 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 11.2 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2) Pallas asteroid class: ShapeModel approx. diameter [km]: 532 approx. diameter ["]: 0.365 distance from Earth [AU]: 2.00850 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#56 date of fit: 2023 Feb 07 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): 0.035", 0.013", 78.334° remarks: * orbital elements for (2)Pallas : Mean anomaly = 10.0393995955 deg Arg. of pericenter = 310.8687714617 deg Long. of node = 172.9186611092 deg Inclination = 34.9266992585 deg Eccentricity = 0.2301365966 Semimajor axis = 2.7698237608 AU Perihelion dist = 2.1323859473 AU Mag: H = 4.12, G = 0.11 Epoch of elements : MJD 60057.02520833 TDT (2023 Apr 23.0252) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#562023Feb07,18.77,2023,4,23,0.604820,0.319359,-0.579256,14.007166,7.726207,0.005223,-0.001143,0.000000,0.000000 -105.2638,1.8876,170.55,12.38,False TYC 0182-00388-1,7.62103254,1.9406497,0.00,11.16,0.00,0.0,0,,7.64096322,1.8876160,0.09,0.00,0,0,0 2,Pallas,8.53,532.0,2.0085,0,0,4.091,33.82,,28.2,0 0,9.8202,2023,4,22,310.8688,172.9187,34.9267,0.23014,2.76982,2.13239,4.12,5.0,0.15 1.044,0.0350,0.0127,78,0.0159,Known errors,-1.00,-1,-1,-1 20230423_0388-1,60004.05 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Mar 01, 01:19 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org