IOTA/IOTA-ES occultation update for (490) Veritas / UCAC4 498-040685 event on 2022 Dec 16, 11:50 UT Visible from Australia Summary ------- On 2022 Dec 16 UT, the 112.4 km diameter asteroid (490) Veritas will occult a 12.5 mag star in the constellation Canis Minor 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 1.33 mag to 13.41 mag (the magnitude of the asteroid) for at most 9.820 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: 99 * date and approx. time of event: 2022 Dec 16, 11:42 - 2022 Dec 16, 11:58 * geocentric midpoint of event [JD]: 2459929.99353763 * magnitude of target star: 12.46 * magnitude drop [mag]: 1.33 * estimated maximum duration [s]: 9.820 * Moon: 50 % sunlit, 69° distance * Sun: 153° distance * rough path description: Australia The occultation path -------------------- * approximate projected width [km]: 130 * 1 sigma uncertainty interval [path widths]: +/- 0.29 * 1 sigma uncertainty interval [seconds]: +/- 4.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.030, +/- 0.020) * 1 sigma uncertainty ellipse (major, minor, PA): (0.030", 0.020", 94°) * approx speed of asteroid's shadow [km/s]: 11.4484 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 498-040685 by 490 Veritas on 2022 Dec 16 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 119 0 0 -29 58 57 11 58 43.8 1 79 -11 -29 23 6 -30 35 1 -29 2 11 -30 56 17 .... 120 0 0 -29 48 49 11 58 43.7 1 78 -12 -29 12 58 -30 24 52 -28 52 3 -30 46 8 0.34 121 0 0 -29 38 41 11 58 43.4 2 78 -13 -29 2 51 -30 14 44 -28 41 55 -30 36 0 0.44 122 0 0 -29 28 33 11 58 42.9 3 77 -14 -28 52 43 -30 4 37 -28 31 48 -30 25 52 0.48 123 0 0 -29 18 27 11 58 42.3 4 77 -15 -28 42 37 -29 54 30 -28 21 41 -30 15 45 0.50 124 0 0 -29 8 21 11 58 41.5 5 76 -15 -28 32 31 -29 44 24 -28 11 36 -30 5 39 0.52 125 0 0 -28 58 16 11 58 40.6 6 76 -16 -28 22 26 -29 34 19 -28 1 31 -29 55 34 0.53 126 0 0 -28 48 12 11 58 39.5 7 75 -17 -28 12 23 -29 24 15 -27 51 28 -29 45 30 0.53 127 0 0 -28 38 10 11 58 38.2 8 75 -18 -28 2 21 -29 14 12 -27 41 27 -29 35 27 0.54 128 0 0 -28 28 10 11 58 36.9 8 74 -19 -27 52 21 -29 4 12 -27 31 27 -29 25 26 0.54 129 0 0 -28 18 11 11 58 35.3 9 74 -19 -27 42 23 -28 54 13 -27 21 29 -29 15 27 0.55 130 0 0 -28 8 15 11 58 33.6 10 73 -20 -27 32 27 -28 44 16 -27 11 33 -29 5 30 0.55 131 0 0 -27 58 20 11 58 31.7 11 73 -21 -27 22 33 -28 34 21 -27 1 39 -28 55 35 0.55 132 0 0 -27 48 29 11 58 29.7 12 72 -22 -27 12 42 -28 24 29 -26 51 48 -28 45 42 0.56 133 0 0 -27 38 39 11 58 27.6 13 72 -22 -27 2 53 -28 14 39 -26 42 0 -28 35 52 0.56 134 0 0 -27 28 53 11 58 25.3 14 71 -23 -26 53 7 -28 4 52 -26 32 14 -28 26 5 0.56 135 0 0 -27 19 10 11 58 22.8 15 71 -24 -26 43 24 -27 55 8 -26 22 31 -28 16 21 0.56 136 0 0 -27 9 30 11 58 20.2 16 70 -25 -26 33 45 -27 45 28 -26 12 52 -28 6 40 0.56 137 0 0 -26 59 53 11 58 17.4 16 70 -25 -26 24 8 -27 35 50 -26 3 16 -27 57 2 0.56 138 0 0 -26 50 20 11 58 14.5 17 69 -26 -26 14 36 -27 26 17 -25 53 44 -27 47 28 0.56 139 0 0 -26 40 50 11 58 11.4 18 69 -27 -26 5 7 -27 16 47 -25 44 16 -27 37 58 0.57 140 0 0 -26 31 25 11 58 8.2 19 69 -27 -25 55 42 -27 7 21 -25 34 51 -27 28 32 0.57 141 0 0 -26 22 4 11 58 4.9 20 68 -28 -25 46 22 -26 57 59 -25 25 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0 -26 24 36 11 43 3.4 16 289 11 -25 48 54 -27 0 32 -25 28 3 -27 21 43 0.60 - 85 0 0 -26 34 0 11 43 0.7 15 289 12 -25 58 17 -27 9 57 -25 37 26 -27 31 8 0.60 - 84 0 0 -26 43 28 11 42 58.2 14 288 13 -26 7 45 -27 19 25 -25 46 53 -27 40 37 0.60 - 83 0 0 -26 53 0 11 42 55.9 13 288 13 -26 17 16 -27 28 58 -25 56 24 -27 50 10 0.60 - 82 0 0 -27 2 36 11 42 53.7 12 287 14 -26 26 51 -27 38 34 -26 5 59 -27 59 47 0.60 - 81 0 0 -27 12 15 11 42 51.7 11 287 15 -26 36 30 -27 48 14 -26 15 37 -28 9 27 0.60 - 80 0 0 -27 21 58 11 42 49.8 10 286 16 -26 46 12 -27 57 57 -26 25 19 -28 19 10 0.60 - 79 0 0 -27 31 44 11 42 48.1 9 286 17 -26 55 58 -28 7 44 -26 35 4 -28 28 57 0.60 - 78 0 0 -27 41 33 11 42 46.5 9 285 18 -27 5 46 -28 17 33 -26 44 52 -28 38 47 0.61 - 77 0 0 -27 51 25 11 42 45.1 8 285 19 -27 15 37 -28 27 25 -26 54 43 -28 48 39 0.61 - 76 0 0 -28 1 19 11 42 43.8 7 284 20 -27 25 31 -28 37 20 -27 4 37 -28 58 34 0.61 - 75 0 0 -28 11 16 11 42 42.7 6 284 21 -27 35 28 -28 47 17 -27 14 33 -29 8 31 0.62 - 74 0 0 -28 21 15 11 42 41.8 5 284 21 -27 45 26 -28 57 16 -27 24 32 -29 18 31 0.62 - 73 0 0 -28 31 16 11 42 41.0 4 283 22 -27 55 27 -29 7 18 -27 34 32 -29 28 33 0.63 - 72 0 0 -28 41 18 11 42 40.4 3 283 23 -28 5 29 -29 17 21 -27 44 34 -29 38 36 0.64 - 71 0 0 -28 51 23 11 42 39.9 2 282 24 -28 15 33 -29 27 25 -27 54 38 -29 48 40 0.67 - 70 0 0 -29 1 28 11 42 39.6 1 282 25 -28 25 38 -29 37 31 -28 4 43 -29 58 47 0.72 - 69 0 0 -29 11 35 11 42 39.4 1 281 26 -28 35 45 -29 47 39 -28 14 50 -30 8 54 0.94 Uncertainty in time = +/- 4 secs Prediction of 2022 Dec 1.1 Data for the target star ------------------------ * name: UCAC4 498-040685 * constellation : Canis Minor * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 07 09 27.7081 DE: +09 32 04.197 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 07 09 27.7081 DE: +09 32 04.197 * position source: Gaia EDR3 * 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: (490) Veritas asteroid class: approx. diameter [km]: 112 approx. diameter ["]: 0.070 distance from Earth [AU]: 2.22890 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): 0.030", 0.020", 93.749° remarks: * orbital elements for (490)Veritas : Mean anomaly = 78.5569793675 deg Arg. of pericenter = 193.3557452751 deg Long. of node = 178.0372801584 deg Inclination = 9.2940641046 deg Eccentricity = 0.0895193859 Semimajor axis = 3.1718887958 AU Perihelion dist = 2.8879432586 AU Mag: H = 8.61, G = 0.15 Epoch of elements : MJD 59929.49340278 TDT (2022 Dec 16.4934) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#562022Nov22,9.82,2022,12,16,11.844903,0.003537,-0.499187,-6.461650,-0.045245,-0.002253,0.001517,0.000001,0.000000 -155.0957,9.4980,1.22,-23.32,False UCAC4 498-040685,7.15769670,9.5344992,0.00,12.46,0.00,0.0,0,,7.17882704,9.4979561,1.33,0.00,0,0,0 490,Veritas,13.41,112.4,2.2289,0,0,-1.723,-0.18,,5.8,0 0,78.4709,2022,12,16,193.3557,178.0373,9.2941,0.08952,3.17189,2.88794,8.62,5.0,0.15 1.293,0.0300,0.0203,94,0.0204,Known errors,-1.00,-1,-1,-1 20221216_040685,59914.08 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Dec 01, 02:01 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org