IOTA/IOTA-ES occultation update for (508) Princetonia / TYC 7418-00987-1 event on 2022 Oct 18, 10:17 UT Visible from Australia Summary ------- On 2022 Oct 18 UT, the 133 km diameter asteroid (508) Princetonia will occult a 12.0 mag star in the constellation Sagittarius for observers along a path across Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.49 mag to 14.41 mag (the magnitude of the asteroid) for at most 5.960 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: 2022 Oct 18, 10:12 - 2022 Oct 18, 10:22 * geocentric midpoint of event [JD]: 2459870.92870508 * magnitude of target star: 12.03 * magnitude drop [mag]: 2.49 * estimated maximum duration [s]: 5.960 * Moon: 44 % sunlit, 161° distance * Sun: 80° distance * rough path description: Australia Additional comments ------------------- RUWE high The occultation path -------------------- * approximate projected width [km]: 134 * 1 sigma uncertainty interval [path widths]: +/- 0.07 * 1 sigma uncertainty interval [seconds]: +/- 1.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.010, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.010", 0.002", 93°) * approx speed of asteroid's shadow [km/s]: 22.3281 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 7418-00987-1 by 508 Princetonia on 2022 Oct 18 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 3 0 0 -20 47 33 10 12 36.2 1 128 68 -21 33 44 -20 1 28 -21 40 29 -19 54 44 .... 4 0 0 -21 31 32 10 12 36.3 2 128 68 -22 17 35 -20 45 36 -22 24 19 -20 38 53 0.17 5 0 0 -22 14 57 10 12 36.6 3 127 69 -23 0 50 -21 29 9 -23 7 33 -21 22 28 0.15 6 0 0 -22 57 46 10 12 37.0 4 127 69 -23 43 30 -22 12 7 -23 50 11 -22 5 27 0.14 7 0 0 -23 39 58 10 12 37.5 6 126 69 -24 25 32 -22 54 29 -24 32 12 -22 47 50 0.14 8 0 0 -24 21 32 10 12 38.2 7 126 69 -25 6 56 -23 36 13 -25 13 34 -23 29 36 0.13 9 0 0 -25 2 28 10 12 38.9 8 126 70 -25 47 41 -24 17 19 -25 54 18 -24 10 43 0.13 10 0 0 -25 42 44 10 12 39.7 9 125 70 -26 27 47 -24 57 46 -26 34 22 -24 51 12 0.13 11 0 0 -26 22 20 10 12 40.7 10 125 70 -27 7 12 -25 37 32 -27 13 45 -25 31 0 0.13 12 0 0 -27 1 15 10 12 41.7 11 124 70 -27 45 56 -26 16 39 -27 52 28 -26 10 8 0.13 13 0 0 -27 39 29 10 12 42.8 12 124 70 -28 23 58 -26 55 4 -28 30 29 -26 48 35 0.13 14 0 0 -28 17 1 10 12 44.1 13 123 70 -29 1 19 -27 32 48 -29 7 48 -27 26 21 0.12 15 0 0 -28 53 51 10 12 45.4 14 123 69 -29 37 57 -28 9 50 -29 44 24 -28 3 24 0.12 16 0 0 -29 29 59 10 12 46.8 16 122 69 -30 13 53 -28 46 9 -30 20 18 -28 39 45 0.12 17 0 0 -30 5 23 10 12 48.2 17 122 69 -30 49 5 -29 21 46 -30 55 29 -29 15 24 0.12 18 0 0 -30 40 5 10 12 49.8 18 121 69 -31 23 35 -29 56 40 -31 29 57 -29 50 19 0.12 19 0 0 -31 14 4 10 12 51.4 19 121 68 -31 57 21 -30 30 50 -32 3 41 -30 24 32 0.12 20 0 0 -31 47 19 10 12 53.1 20 120 68 -32 30 25 -31 4 18 -32 36 43 -30 58 1 0.12 21 0 0 -32 19 52 10 12 54.9 21 120 67 -33 2 45 -31 37 3 -33 9 1 -31 30 48 0.12 22 0 0 -32 51 41 10 12 56.7 22 119 67 -33 34 21 -32 9 4 -33 40 36 -32 2 51 0.12 23 0 0 -33 22 47 10 12 58.6 23 119 66 -34 5 15 -32 40 22 -34 11 27 -32 34 11 0.12 24 0 0 -33 53 9 10 13 0.5 24 118 66 -34 35 25 -33 10 57 -34 41 36 -33 4 48 0.12 25 0 0 -34 22 49 10 13 2.5 25 117 65 -35 4 53 -33 40 49 -35 11 2 -33 34 41 0.12 26 0 0 -34 51 47 10 13 4.6 26 117 65 -35 33 38 -34 9 59 -35 39 45 -34 3 53 0.12 27 0 0 -35 20 1 10 13 6.7 27 116 64 -36 1 41 -34 38 26 -36 7 46 -34 32 21 0.12 28 0 0 -35 47 34 10 13 8.8 27 116 64 -36 29 1 -35 6 10 -36 35 5 -35 0 7 0.12 29 0 0 -36 14 24 10 13 11.0 28 115 63 -36 55 40 -35 33 12 -37 1 42 -35 27 11 0.12 30 0 0 -36 40 33 10 13 13.3 29 114 62 -37 21 37 -35 59 33 -37 27 37 -35 53 34 0.12 31 0 0 -37 6 0 10 13 15.5 30 114 62 -37 46 52 -36 25 12 -37 52 51 -36 19 15 0.12 32 0 0 -37 30 47 10 13 17.9 31 113 61 -38 11 27 -36 50 10 -38 17 24 -36 44 14 0.11 33 0 0 -37 54 53 10 13 20.2 32 112 60 -38 35 21 -37 14 27 -38 41 17 -37 8 33 0.11 34 0 0 -38 18 18 10 13 22.6 33 112 60 -38 58 36 -37 38 4 -39 4 29 -37 32 11 0.11 35 0 0 -38 41 3 10 13 25.0 34 111 59 -39 21 10 -38 1 0 -39 27 2 -37 55 9 0.11 36 0 0 -39 3 9 10 13 27.5 35 110 58 -39 43 5 -38 23 17 -39 48 55 -38 17 28 0.11 37 0 0 -39 24 36 10 13 30.0 36 110 58 -40 4 21 -38 44 54 -40 10 10 -38 39 6 0.11 38 0 0 -39 45 24 10 13 32.5 36 109 57 -40 24 59 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1 41 - 1 43 3 0 5 12 0.13 174 0 0 0 1 8 10 21 51.6 17 233 -62 - 0 46 2 0 48 13 - 0 52 56 0 55 5 0.13 175 0 0 0 50 52 10 21 53.5 16 233 -63 0 3 48 1 37 49 - 0 3 5 1 44 40 0.13 176 0 0 1 40 16 10 21 55.1 14 233 -64 0 53 20 2 27 7 0 46 28 2 33 57 0.14 177 0 0 2 29 20 10 21 56.7 13 233 -65 1 42 32 3 16 3 1 35 41 3 22 52 0.14 178 0 0 3 18 2 10 21 58.1 12 233 -66 2 31 21 4 4 37 2 24 32 4 11 24 0.14 179 0 0 4 6 19 10 21 59.3 11 233 -68 3 19 47 4 52 45 3 12 59 4 59 32 0.14 180 0 0 4 54 10 10 22 0.4 9 233 -69 4 7 47 5 40 27 4 1 0 5 47 13 0.15 -179 0 0 5 41 34 10 22 1.4 8 233 -70 4 55 20 6 27 41 4 48 34 6 34 25 0.15 -178 0 0 6 28 28 10 22 2.2 7 233 -71 5 42 24 7 14 26 5 35 40 7 21 8 0.16 -177 0 0 7 14 51 10 22 2.8 5 233 -72 6 28 57 8 0 39 6 22 15 8 7 20 0.17 -176 0 0 8 0 42 10 22 3.4 4 233 -73 7 14 59 8 46 19 7 8 18 8 52 59 0.18 -175 0 0 8 45 59 10 22 3.8 3 233 -74 8 0 27 9 31 26 7 53 47 9 38 4 0.20 -174 0 0 9 30 42 10 22 4.0 2 233 -75 8 45 21 10 15 58 8 38 43 10 22 34 0.26 -173 0 0 10 14 49 10 22 4.1 1 234 -76 9 29 39 10 59 53 9 23 2 11 6 28 0.61 Uncertainty in time = +/- 1 secs Prediction of 2022 Oct 17.0 Data for the target star ------------------------ * name: TYC 7418-00987-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 08 12.7040 DE: -35 36 03.203 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 08 12.7039 DE: -35 36 03.203 * position source: Gaia EDR3 * standard error: RA,DE [mas]: (0.400,0.300) * V mag [mag]: 12.0 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (508) Princetonia asteroid class: approx. diameter [km]: 133 approx. diameter ["]: 0.058 distance from Earth [AU]: 3.16550 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#106 date of fit: 2022 Sep 21 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", 92.935° remarks: * orbital elements for (508)Princetonia : Mean anomaly = 49.9921523324 deg Arg. of pericenter = 208.2588234333 deg Long. of node = 44.1942228525 deg Inclination = 13.3379523740 deg Eccentricity = 0.0076058862 Semimajor axis = 3.1602484287 AU Perihelion dist = 3.1362119388 AU Mag: H = 8.47, G = 0.15 Epoch of elements : MJD 59870.42868056 TDT (2022 Oct 18.4287) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1062022Sep21,5.96,2022,10,18,10.288922,0.034182,-0.099311,11.919326,4.093240,0.005772,0.000471,0.000000,0.000000 106.2058,-35.5669,21.96,-9.68,False TYC 7418-00987-1,19.13686222,-35.6008897,0.00,12.03,0.00,0.0,0,,19.16178065,-35.5669143,2.50,0.00,0,0,0 508,Princetonia,14.41,133.0,3.1655,0,0,2.714,11.37,,7.0,0 0,49.9169,2022,10,18,208.2588,44.1942,13.3380,0.00761,3.16025,3.13621,8.48,5.0,0.15 1.073,0.0103,0.0019,93,0.0042,Known errors,-1.00,-1,-1,-1 20221018_0987-1,59868.96 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Oct 16, 23:04 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org