IOTA/IOTA-ES occultation update for (469) Argentina / TYC 2912-01147-1 event on 2012 Dec 19, 20:15 UT Visible from N Russia, Greenland Summary ------- On 2012 Dec 19 UT, the 123 km diameter asteroid (469) Argentina will occult a 7.8 mag star in the constellation Auriga for observers along a path across N Russia, Greenland. In the case of an occultation, the combined light of the asteroid and the star will drop by 5.4 mag to 13.2 mag (the magnitude of the asteroid) for at most 9.1 seconds. This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Alice Monet, TMO astrometry for the asteroid kindly provided by Bill Owen, historical astrometry from the MPC files (via AstDys), and the following catalogs for the star position: . The event at a glimpse ---------------------- * Rank: 92 * date and approx. time of event: 2012 Dec 19, 20:11 - 2012 Dec 19, 20:19 UT * geocentric midpoint of event [JD]: 2456281.34392917 * magnitude of target star: 7.8 * magnitude drop [mag]: 5.4 * estimated maximum duration [s]: 9.1 * Moon: 46 % sunlit, 94° distance * Sun: 165° distance * rough path description: N Russia, Greenland The occultation path -------------------- * approximate projected width [km]: 221 * 1 sigma uncertainty interval [path widths]: +/- 0.49 * 1 sigma uncertainty interval [seconds]: +/- 3.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .042 +/- .038) * 1 sigma uncertainty ellipse (major, minor, PA): ( .042", .038", 91° ) * approx speed of asteroid's shadow [km/s]: 13.6260 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 2912-01147-1 by 469 Argentina on 2012 Dec 19 Centre Star Star Sun Path Limit1 Path Limit2 Error Limit1 Error Limit2 E. Longitude Latitude U.T. Alt Az Alt o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " o ' " o ' " o ' " o ' " Longitude Latitude Longitude Latitude Longitude Latitude Longitude Latitude -173 53 18 57 30 31 20 11 23 15 320 -1 -176 23 59 58 37 0 -171 17 41 56 11 5 -178 45 44 59 31 32 -168 40 13 54 37 19 -174 43 21 59 7 54 20 11 30 17 319 -3 -177 12 50 60 7 48 -172 11 4 57 57 36 -179 34 41 60 57 30 -169 40 21 56 37 10 -175 26 15 60 38 13 20 11 37 18 319 -4 -177 55 57 61 33 6 -172 55 11 59 34 36 179 41 4 62 18 57 -170 27 44 58 23 9 -176 3 9 62 3 3 20 11 44 19 318 -5 -178 34 7 62 53 56 -173 31 52 61 4 31 179 0 55 63 36 39 -171 5 40 59 59 38 -176 34 47 63 23 27 20 11 51 21 317 -6 -179 7 52 64 11 6 -174 2 14 62 28 57 178 24 30 64 51 12 -171 35 54 61 29 2 -177 1 34 64 40 11 20 11 58 22 317 -7 -179 37 31 65 25 10 -174 26 54 63 48 56 177 51 32 66 3 4 -171 59 26 62 52 55 -177 23 44 65 53 49 20 12 4 23 316 -8 179 56 47 66 36 34 -174 46 14 65 5 13 177 21 53 67 12 37 -172 16 50 64 12 19 -177 41 24 67 4 46 20 12 11 24 315 -9 179 34 56 67 45 39 -175 0 25 66 18 21 176 55 29 68 20 7 -172 28 25 65 27 59 -177 54 33 68 13 23 20 12 18 24 315 -10 179 16 59 68 52 42 -175 9 27 67 28 46 176 32 20 69 25 48 -172 34 14 66 40 28 -178 3 2 69 19 56 20 12 25 25 314 -10 179 3 2 69 57 56 -175 13 13 68 36 48 176 12 31 70 29 53 -172 34 15 67 50 10 -178 6 37 70 24 37 20 12 32 26 314 -11 178 53 19 71 1 32 -175 11 29 69 42 42 175 56 13 71 32 31 -172 28 14 68 57 24 -178 4 56 71 27 37 20 12 38 27 314 -12 178 48 9 72 3 39 -175 3 52 70 46 39 175 43 40 72 33 49 -172 15 50 70 2 26 -177 57 32 72 29 4 20 12 45 27 313 -12 178 47 56 73 4 25 -174 49 54 71 48 51 175 35 13 73 33 55 -171 56 35 71 5 26 -177 43 47 73 29 5 20 12 52 28 313 -13 178 53 14 74 3 55 -174 28 55 72 49 23 175 31 20 74 32 55 -171 29 50 72 6 33 -177 22 52 74 27 44 20 12 59 29 313 -14 179 4 47 75 2 15 -174 0 6 73 48 22 175 32 35 75 30 53 -170 54 48 73 5 54 -176 53 48 75 25 6 20 13 6 29 313 -14 179 23 30 75 59 27 -173 22 25 74 45 51 175 39 47 76 27 53 -170 10 28 74 3 31 -176 15 18 76 21 12 20 13 13 30 313 -15 179 50 34 76 55 35 -172 34 36 75 41 52 175 53 55 77 23 57 -169 15 37 74 59 27 -175 25 45 77 16 2 20 13 19 30 314 -15 -179 32 28 77 50 40 -171 35 4 76 36 24 176 16 22 78 19 9 -168 8 47 75 53 41 -174 23 6 78 9 36 20 13 26 31 314 -16 -178 43 36 78 44 41 -170 21 49 77 29 25 176 48 52 79 13 28 -166 48 8 76 46 12 -173 4 44 79 1 49 20 13 33 31 315 -16 -177 40 14 79 37 37 -168 52 27 78 20 52 177 33 48 80 6 55 -165 11 31 77 36 53 -171 27 19 79 52 36 20 13 40 31 316 -16 -176 18 55 80 29 23 -167 3 56 79 10 36 178 34 25 80 59 28 -163 16 19 78 25 37 -169 26 32 80 41 47 20 13 47 32 318 -17 -174 35 1 81 19 51 -164 52 33 79 58 26 179 55 12 81 51 1 -160 59 29 79 12 12 -166 56 52 81 29 7 20 13 54 32 320 -17 -172 22 15 82 8 52 -162 13 47 80 44 6 -178 17 26 82 41 29 -158 17 26 79 56 21 -163 51 17 82 14 16 20 14 0 32 322 -17 -169 32 6 82 56 6 -159 2 14 81 27 14 -175 54 17 83 30 37 -155 6 14 80 37 44 -160 0 59 82 56 45 20 14 7 33 326 -18 -165 52 55 83 41 6 -155 11 45 82 7 22 -172 41 39 84 18 5 -151 21 39 81 15 53 -155 15 30 83 35 51 20 14 14 33 330 -18 -161 9 9 84 23 13 -150 35 46 82 43 51 -168 19 1 85 3 18 -146 59 46 81 50 14 -149 23 33 84 10 38 20 14 21 33 335 -18 -155 0 58 85 1 23 -145 8 21 83 15 52 -162 15 49 85 45 17 -141 57 40 82 20 6 -142 15 36 84 39 52 20 14 28 33 342 -18 -147 6 34 85 34 8 -138 46 4 83 42 26 -153 49 6 86 22 23 -136 14 39 82 44 43 -133 49 1 85 2 6 20 14 35 34 350 -18 -137 10 23 85 59 26 -131 30 43 84 2 31 -142 10 41 86 51 56 -129 53 48 83 3 19 -124 15 22 85 15 48 20 14 41 34 359 -19 -125 20 49 86 14 53 -123 32 16 84 15 5 -127 4 45 87 10 8 -123 3 3 83 15 9 -114 4 41 85 19 51 20 14 48 34 8 -19 -112 28 5 86 18 36 -115 9 47 84 19 25 -109 57 1 87 13 24 -115 55 19 83 19 45 -103 59 58 85 13 55 20 14 55 34 18 -19 - 99 54 33 86 10 5 -106 48 26 84 15 18 - 93 47 20 87 1 3 -108 46 51 83 16 55 - 94 42 0 84 58 40 20 15 2 34 27 -19 - 88 52 4 85 50 41 - 98 53 3 84 3 4 - 80 47 26 86 35 59 -101 54 0 83 6 53 - 86 35 49 84 35 27 20 15 9 34 34 -19 - 79 50 55 85 22 42 - 91 41 54 83 43 33 - 71 12 27 86 2 14 - 95 30 1 82 50 11 - 79 48 28 84 5 51 20 15 15 34 40 -19 - 72 46 6 84 48 28 - 85 24 6 83 17 50 - 64 19 38 85 22 58 - 89 43 16 82 27 34 - 74 14 47 83 31 19 20 15 22 34 45 -19 - 67 17 38 84 9 49 - 80 0 51 82 47 1 - 59 22 8 84 40 13 - 84 37 9 81 59 52 - 69 44 21 82 53 2 20 15 29 34 49 -19 - 63 4 3 83 28 2 - 75 28 22 82 12 6 - 55 44 45 83 55 11 - 80 11 14 81 27 55 - 66 5 57 82 11 54 20 15 36 34 52 -19 - 59 47 21 82 43 59 - 71 40 35 81 33 54 - 53 3 29 83 8 36 - 76 22 41 80 52 25 - 63 9 30 81 28 34 20 15 43 34 55 -19 - 57 13 50 81 58 16 - 68 30 56 80 53 4 - 51 2 26 82 20 54 - 73 7 37 80 13 58 - 60 46 41 80 43 29 20 15 50 34 57 -19 - 55 13 20 81 11 16 - 65 53 19 80 10 6 - 49 30 50 81 32 21 - 70 21 49 79 33 5 - 58 50 53 79 57 1 20 15 56 34 58 -19 - 53 38 25 80 23 14 - 63 42 24 79 25 23 - 48 21 23 80 43 8 - 68 1 17 78 50 9 - 57 16 57 79 9 23 20 16 3 33 59 -19 - 52 23 38 79 34 22 - 61 53 42 78 39 12 - 47 28 55 79 53 20 - 66 2 23 78 5 28 - 56 0 49 78 20 46 20 16 10 33 60 -19 - 51 24 52 78 44 46 - 60 23 36 77 51 45 - 46 49 45 79 3 3 - 64 22 1 77 19 16 - 54 59 22 77 31 16 20 16 17 33 60 -19 - 50 39 5 77 54 31 - 59 9 5 77 3 12 - 46 21 13 78 12 17 - 62 57 30 76 31 45 - 54 10 5 76 40 59 20 16 24 33 60 -18 - 50 3 56 77 3 40 - 58 7 45 76 13 39 - 46 1 18 77 21 6 - 61 46 37 75 43 1 - 53 31 3 75 49 59 20 16 31 32 61 -18 - 49 37 37 76 12 15 - 57 17 37 75 23 12 - 45 48 31 76 29 28 - 60 47 30 74 53 12 - 53 0 43 74 58 16 20 16 37 32 61 -18 - 49 18 44 75 20 17 - 56 37 7 74 31 52 - 45 41 40 75 37 23 - 59 58 35 74 2 21 - 52 37 50 74 5 52 20 16 44 32 60 -18 - 49 6 12 74 27 45 - 56 4 56 73 39 43 - 45 39 53 74 44 52 - 59 18 35 73 10 30 - 52 21 24 73 12 46 20 16 51 31 60 -17 - 48 59 8 73 34 39 - 55 40 1 72 46 44 - 45 42 27 73 51 52 - 58 46 25 72 17 42 - 52 10 38 72 18 59 20 16 58 31 60 -17 - 48 56 49 72 40 58 - 55 21 29 71 52 56 - 45 48 48 72 58 21 - 58 21 12 71 23 56 - 52 4 51 71 24 29 20 17 5 31 60 -17 - 48 58 43 71 46 40 - 55 8 37 70 58 17 - 45 58 31 72 4 19 - 58 2 12 70 29 11 - 52 3 33 70 29 13 20 17 12 30 59 -16 - 49 4 23 70 51 42 - 55 0 52 70 2 46 - 46 11 15 71 9 43 - 57 48 48 69 33 27 - 52 6 17 69 33 10 20 17 18 30 59 -16 - 49 13 26 69 56 3 - 54 57 43 69 6 21 - 46 26 41 70 14 29 - 57 40 30 68 36 41 - 52 12 42 68 36 16 20 17 25 29 58 -16 - 49 25 36 68 59 39 - 54 58 47 68 8 57 - 46 44 39 69 18 35 - 57 36 52 67 38 48 - 52 22 33 67 38 27 20 17 32 29 58 -15 - 49 40 38 68 2 26 - 55 3 46 67 10 32 - 47 4 56 68 21 57 - 57 37 35 66 39 46 - 52 35 35 66 39 39 20 17 39 28 57 -15 - 49 58 23 67 4 20 - 55 12 25 66 11 0 - 47 27 26 67 24 32 - 57 42 22 65 39 28 - 52 51 40 65 39 47 20 17 46 27 56 -14 - 50 18 43 66 5 17 - 55 24 33 65 10 15 - 47 52 3 66 26 15 - 57 51 3 64 37 49 - 53 10 41 64 38 44 20 17 52 27 56 -14 - 50 41 32 65 5 11 - 55 40 2 64 8 11 - 48 18 44 65 27 0 - 58 3 28 63 34 39 - 53 32 33 63 36 23 20 17 59 26 55 -13 - 51 6 47 64 3 55 - 55 58 47 63 4 38 - 48 47 28 64 26 43 - 58 19 34 62 29 49 - 53 57 14 62 32 35 20 18 6 25 54 -12 - 51 34 28 63 1 22 - 56 20 47 61 59 28 - 49 18 13 63 25 15 - 58 39 20 61 23 7 - 54 24 48 61 27 10 20 18 13 24 54 -12 - 52 4 37 61 57 22 - 56 46 5 60 52 26 - 49 51 3 62 22 30 - 59 2 48 60 14 19 - 54 55 18 60 19 56 20 18 20 24 53 -11 - 52 37 16 60 51 46 - 57 14 45 59 43 20 - 50 26 2 61 18 18 - 59 30 7 59 3 6 - 55 28 52 59 10 37 20 18 27 23 52 -10 - 53 12 34 59 44 20 - 57 46 58 58 31 48 - 51 3 17 60 12 28 - 60 1 32 57 49 4 - 56 5 43 57 58 54 20 18 33 22 51 -9 - 53 50 41 58 34 49 - 58 23 1 57 17 29 - 51 42 56 59 4 47 - 60 37 23 56 31 42 - 56 46 9 56 44 23 20 18 40 21 50 -8 - 54 31 51 57 22 54 - 59 3 16 55 59 51 - 52 25 11 57 54 59 - 61 18 13 55 10 20 - 57 30 35 55 26 33 20 18 47 20 50 -7 - 55 16 24 56 8 9 - 59 48 20 54 38 12 - 53 10 20 56 42 44 - 62 4 51 53 43 59 - 58 19 39 54 4 43 20 18 54 18 49 -6 - 56 4 48 54 50 5 - 60 39 2 53 11 34 - 53 58 45 55 27 37 - 62 58 33 52 11 16 - 59 14 13 52 37 53 20 19 1 17 48 -5 - 56 57 42 53 27 57 - 61 36 41 51 38 34 - 54 50 55 54 9 5 - 64 1 20 50 29 58 - 60 15 36 51 4 40 20 19 8 15 47 -4 - 57 56 1 52 0 48 - 62 43 20 49 56 57 - 55 47 32 52 46 25 - 65 16 50 48 36 13 - 61 25 57 49 22 50 20 19 14 14 46 -2 - 59 1 7 50 27 10 - 64 2 44 48 2 50 - 56 49 36 51 18 35 - 66 52 45 46 21 54 - 62 49 2 47 28 28 20 19 21 12 44 0 - 60 15 14 48 44 48 - 65 42 40 45 48 6 - 57 58 34 49 44 4 - 69 12 39 43 22 25 Uncertainty in time = +/- 5 secs Prediction of 2012 Dec 17.0 Data for the target star ------------------------ * name: TYC 2912-01147-1 * constellation : Auriga * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 05 57 28.7335 DE: +38 38 13.956 * position source: mpos:TYC pm:TYC * standard error: RA,DE ["]: ( .035, .036 ) * V mag [mag]: 7.8 * B mag [mag]: 9.2 * Diameter [mas]: 1 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (469) Argentina approx. diameter [km]: 123 approx. diameter ["]: .078 distance from Earth [AU]: 2.17600 * orbital information: orbit source: Preston date of fit: 2012 Dec 16 source of used astrometry: FASTT TMO MPC (via Astdys) number of used observations: 1060 number of rejected observations: 75 time covered by the observations: 1907 Apr 04 - 2012 Dec 04 1 sigma uncertainty ellipse (major, minor, PA): 0.022, 0.014, 93° remarks: * orbital elements for (469) Argentina : Mean anomaly = 284.53275948 deg Arg. of pericenter = 208.87321315 deg Long. of node = 333.53317134 deg Inclination = 11.58643775 deg Eccentricity = 0.15967660 Semimajor axis = 3.18338787 AU Perihelion dist = 2.67507531 AU Mag: H = 8.62, G = 0.15 Epoch of elements : MJD 56280.84400000 TDT (2012 Dec 19.844) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Dec 19 469 Argentina 20h 15.3m UT 7.8 5 57 28.734 38 38 13.96TYC 2912-01147-1 9.2 13.2 125 9.1 2.176 -2.644 -2.68 56.7259 38.639 -124.44 -23.43 20.2543 -0.07067 0.82129 -7.66254 -0.65999 -0.00010 -0.00159 2000 284.38630120121219.00000208.873213333.533171 11.5864380.15967660 3.1833879 2.6750753 8.6 5.00.15 RATE 1.7352810 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.042 0.038 91 1.48 0.039 0 1-5-4 056278.0020121219_1147-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Dec 16, 18:54 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org