IOTA/IOTA-ES occultation update for (1140) Crimea / TYC 2419-00693-1 event on 2012 Dec 21, 04:08 UT Visible from USA, SE Canada Summary ------- On 2012 Dec 21 UT, the 29 km diameter asteroid (1140) Crimea will occult a 11.4 mag star in the constellation Auriga for observers along a path across USA, SE Canada. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.5 mag to 13.8 mag (the magnitude of the asteroid) for at most 2.3 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: UCAC. The event at a glimpse ---------------------- * Rank: 39 * date and approx. time of event: 2012 Dec 21, 03:59 - 2012 Dec 21, 04:16 UT * geocentric midpoint of event [JD]: 2456282.6721375 * magnitude of target star: 11.4 * magnitude drop [mag]: 2.5 * estimated maximum duration [s]: 2.3 * Moon: 59 % sunlit, 81° distance * Sun: 172° distance * rough path description: USA, SE Canada The occultation path -------------------- * approximate projected width [km]: 29 * 1 sigma uncertainty interval [path widths]: +/- 1.68 * 1 sigma uncertainty interval [seconds]: +/- 3.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .049 +/- .039) * 1 sigma uncertainty ellipse (major, minor, PA): ( .049", .039", 87° ) * approx speed of asteroid's shadow [km/s]: 12.7804 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 2419-00693-1 by 1140 Crimea on 2012 Dec 21 Centre Star Star Sun Path Limits Error Limits E. Longitude Latitude U.T. Alt Az Alt Limit 1 Limit 2 Limit 3 Limit 4 o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " Latitude Latitude Latitude Latitude -166 0 0 25 20 52 4 16 6 2 57 0 25 30 21 25 11 22 26 2 17 24 39 30 -165 0 0 25 56 43 4 16 6 3 57 -1 26 6 11 25 47 16 26 38 1 25 15 30 -164 0 0 26 31 59 4 16 5 4 58 -2 26 41 25 26 22 34 27 13 8 25 50 55 -163 0 0 27 6 40 4 16 5 5 58 -3 27 16 4 26 57 16 27 47 40 26 25 44 -162 0 0 27 40 44 4 16 4 6 58 -4 27 50 6 27 31 23 28 21 35 26 59 58 -161 0 0 28 14 12 4 16 3 7 59 -5 28 23 31 28 4 52 28 54 53 27 33 34 -160 0 0 28 47 3 4 16 1 8 59 -6 28 56 20 28 37 46 29 27 35 28 6 35 -159 0 0 29 19 17 4 16 0 9 60 -7 29 28 33 29 10 2 29 59 40 28 38 58 -158 0 0 29 50 54 4 15 58 10 60 -8 30 0 8 29 41 41 30 31 8 29 10 45 -157 0 0 30 21 55 4 15 57 11 61 -9 30 31 6 30 12 44 31 1 59 29 41 54 -156 0 0 30 52 18 4 15 55 12 61 -10 31 1 27 30 43 9 31 32 13 30 12 26 -155 0 0 31 22 3 4 15 53 13 62 -11 31 31 10 31 12 57 32 1 49 30 42 22 -154 0 0 31 51 12 4 15 51 14 62 -12 32 0 17 31 42 8 32 30 49 31 11 40 -153 0 0 32 19 44 4 15 49 15 63 -13 32 28 46 32 10 42 32 59 11 31 40 21 -152 0 0 32 47 39 4 15 46 16 64 -14 32 56 39 32 38 38 33 26 56 32 8 24 -151 0 0 33 14 56 4 15 44 17 64 -15 33 23 55 33 5 58 33 54 5 32 35 52 -150 0 0 33 41 37 4 15 42 18 65 -16 33 50 34 33 32 41 34 20 37 33 2 42 -149 0 0 34 7 42 4 15 39 19 65 -17 34 16 36 33 58 48 34 46 32 33 28 55 -148 0 0 34 33 10 4 15 36 20 66 -18 34 42 2 34 24 18 35 11 51 33 54 32 -147 0 0 34 58 2 4 15 33 21 66 -19 35 6 52 34 49 12 35 36 34 34 19 33 -146 0 0 35 22 18 4 15 31 22 67 -20 35 31 5 35 13 30 36 0 41 34 43 58 -145 0 0 35 45 58 4 15 28 23 68 -21 35 54 43 35 37 12 36 24 12 35 7 47 -144 0 0 36 9 2 4 15 25 23 68 -21 36 17 46 36 0 18 36 47 8 35 31 0 -143 0 0 36 31 31 4 15 21 24 69 -22 36 40 13 36 22 49 37 9 28 35 53 38 -142 0 0 36 53 25 4 15 18 25 69 -23 37 2 5 36 44 46 37 31 14 36 15 40 -141 0 0 37 14 45 4 15 15 26 70 -24 37 23 23 37 6 7 37 52 25 36 37 8 -140 0 0 37 35 30 4 15 11 27 71 -25 37 44 6 37 26 54 38 13 2 36 58 1 -139 0 0 37 55 41 4 15 8 28 71 -26 38 4 15 37 47 6 38 33 5 37 18 20 -138 0 0 38 15 18 4 15 5 29 72 -27 38 23 50 38 6 45 38 52 34 37 38 5 -137 0 0 38 34 21 4 15 1 29 73 -27 38 42 52 38 25 50 39 11 29 37 57 16 -136 0 0 38 52 51 4 14 57 30 73 -28 39 1 20 38 44 22 39 29 52 38 15 54 -135 0 0 39 10 48 4 14 54 31 74 -29 39 19 16 39 2 21 39 47 42 38 33 58 -134 0 0 39 28 13 4 14 50 32 74 -30 39 36 38 39 19 47 40 4 59 38 51 30 -133 0 0 39 45 5 4 14 46 33 75 -31 39 53 29 39 36 41 40 21 44 39 8 29 -132 0 0 40 1 25 4 14 42 34 76 -31 40 9 47 39 53 3 40 37 57 39 24 56 -131 0 0 40 17 13 4 14 38 34 77 -32 40 25 34 40 8 52 40 53 38 39 40 51 -130 0 0 40 32 30 4 14 34 35 77 -33 40 40 49 40 24 11 41 8 48 39 56 15 -129 0 0 40 47 16 4 14 30 36 78 -34 40 55 33 40 38 58 41 23 27 40 11 7 -128 0 0 41 1 30 4 14 26 37 79 -34 41 9 47 40 53 14 41 37 36 40 25 28 -127 0 0 41 15 14 4 14 22 37 79 -35 41 23 29 41 6 59 41 51 14 40 39 18 -126 0 0 41 28 28 4 14 18 38 80 -36 41 36 42 41 20 15 42 4 22 40 52 38 -125 0 0 41 41 12 4 14 14 39 81 -37 41 49 24 41 33 0 42 17 0 41 5 27 -124 0 0 41 53 26 4 14 9 40 81 -37 42 1 37 41 45 15 42 29 8 41 17 46 -123 0 0 42 5 10 4 14 5 40 82 -38 42 13 20 41 57 1 42 40 47 41 29 36 -122 0 0 42 16 26 4 14 1 41 83 -39 42 24 34 42 8 17 42 51 58 41 40 56 -121 0 0 42 27 12 4 13 56 42 84 -39 42 35 19 42 19 4 43 2 39 41 51 48 -120 0 0 42 37 29 4 13 52 43 84 -40 42 45 36 42 29 23 43 12 51 42 2 10 -119 0 0 42 47 18 4 13 47 43 85 -41 42 55 23 42 39 13 43 22 36 42 12 3 -118 0 0 42 56 38 4 13 43 44 86 -42 43 4 43 42 48 34 43 31 52 42 21 28 -117 0 0 43 5 31 4 13 38 45 87 -42 43 13 34 42 57 27 43 40 40 42 30 24 -116 0 0 43 13 55 4 13 34 46 87 -43 43 21 58 43 5 53 43 49 1 42 38 53 -115 0 0 43 21 52 4 13 29 46 88 -44 43 29 54 43 13 51 43 56 54 42 46 53 -114 0 0 43 29 22 4 13 25 47 89 -44 43 37 23 43 21 21 44 4 20 42 54 26 -113 0 0 43 36 24 4 13 20 48 90 -45 43 44 24 43 28 23 44 11 18 43 1 31 -112 0 0 43 42 58 4 13 15 48 91 -46 43 50 58 43 34 59 44 17 50 43 8 9 -111 0 0 43 49 6 4 13 11 49 91 -46 43 57 5 43 41 7 44 23 55 43 14 20 -110 0 0 43 54 47 4 13 6 50 92 -47 44 2 45 43 46 49 44 29 33 43 20 4 -109 0 0 44 0 1 4 13 1 51 93 -48 44 7 59 43 52 4 44 34 45 43 25 20 -108 0 0 44 4 49 4 12 56 51 94 -48 44 12 46 43 56 52 44 39 31 43 30 10 -107 0 0 44 9 10 4 12 51 52 95 -49 44 17 7 44 1 14 44 43 50 43 34 34 -106 0 0 44 13 5 4 12 46 53 96 -50 44 21 1 44 5 9 44 47 43 43 38 30 -105 0 0 44 16 34 4 12 41 53 96 -50 44 24 30 44 8 38 44 51 10 43 42 1 -104 0 0 44 19 36 4 12 36 54 97 -51 44 27 32 44 11 41 44 54 11 43 45 5 -103 0 0 44 22 13 4 12 31 55 98 -52 44 30 8 44 14 18 44 56 46 43 47 42 -102 0 0 44 24 23 4 12 26 55 99 -52 44 32 18 44 16 28 44 58 56 43 49 54 -101 0 0 44 26 8 4 12 21 56 100 -53 44 34 3 44 18 13 45 0 39 43 51 39 -100 0 0 44 27 26 4 12 16 57 101 -54 44 35 21 44 19 32 45 1 57 43 52 58 - 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0 0 19 9 0 0 - 0 0 43 4 0 7 19 303 -19 0 8 59 - 0 10 24 0 41 36 - 0 42 57 10 0 0 - 0 43 11 4 0 3 18 303 -18 - 0 33 31 - 0 52 52 - 0 0 57 - 1 25 21 11 0 0 - 1 25 25 4 0 0 17 303 -16 - 1 15 45 - 1 35 5 - 0 43 16 - 2 7 30 12 0 0 - 2 7 22 3 59 57 16 303 -15 - 1 57 44 - 2 17 1 - 1 25 19 - 2 49 22 13 0 0 - 2 49 2 3 59 54 15 303 -14 - 2 39 25 - 2 58 39 - 2 7 4 - 3 30 55 14 0 0 - 3 30 22 3 59 52 13 303 -13 - 3 20 46 - 3 39 58 - 2 48 30 - 4 12 10 15 0 0 - 4 11 22 3 59 50 12 303 -12 - 4 1 48 - 4 20 56 - 3 29 36 - 4 53 3 16 0 0 - 4 52 0 3 59 48 11 303 -10 - 4 42 27 - 5 1 32 - 4 10 21 - 5 33 35 17 0 0 - 5 32 15 3 59 46 10 303 -9 - 5 22 44 - 5 41 46 - 4 50 42 - 6 13 43 18 0 0 - 6 12 6 3 59 44 9 302 -8 - 6 2 36 - 6 21 35 - 5 30 40 - 6 53 27 19 0 0 - 6 51 31 3 59 43 7 302 -7 - 6 42 3 - 7 0 59 - 6 10 13 - 7 32 45 20 0 0 - 7 30 30 3 59 41 6 302 -6 - 7 21 4 - 7 39 56 - 6 49 19 - 8 11 37 21 0 0 - 8 9 2 3 59 40 5 302 -5 - 7 59 37 - 8 18 26 - 7 27 59 - 8 50 1 22 0 0 - 8 47 5 3 59 40 4 302 -3 - 8 37 42 - 8 56 27 - 8 6 10 - 9 27 56 23 0 0 - 9 24 39 3 59 39 3 302 -2 - 9 15 18 - 9 33 59 - 8 43 51 -10 5 22 24 0 0 -10 1 42 3 59 39 1 302 -1 - 9 52 23 -10 11 1 - 9 21 3 -10 42 17 Uncertainty in time = +/- 5 secs Prediction of 2012 Dec 17.0 Data for the target star ------------------------ * name: TYC 2419-00693-1 * constellation : Auriga * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 06 06 22.8252 DE: +30 44 14.653 * position source: mpos:UCAC4 pm:UCAC4 * standard error: RA,DE ["]: ( .042, .036 ) * V mag [mag]: 11.4 * B mag [mag]: 11.8 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1140) Crimea approx. diameter [km]: 29 approx. diameter ["]: .024 distance from Earth [AU]: 1.64800 * orbital information: orbit source: Preston date of fit: 2012 Dec 16 source of used astrometry: FASTT TMO MPC (via Astdys) number of used observations: 853 number of rejected observations: 48 time covered by the observations: 1935 Feb 09 - 2012 Dec 09 1 sigma uncertainty ellipse (major, minor, PA): 0.025, 0.015, 78° remarks: * orbital elements for (1140) Crimea : Mean anomaly = 56.37062287 deg Arg. of pericenter = 311.03542957 deg Long. of node = 72.15859416 deg Inclination = 14.13848254 deg Eccentricity = 0.11341143 Semimajor axis = 2.77306866 AU Perihelion dist = 2.45857097 AU Mag: H = 9.64, G = 0.15 Epoch of elements : MJD 56282.17200000 TDT (2012 Dec 21.172) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Dec 21 1140 Crimea 4h 7.9m UT 11.4 6 6 22.825 30 44 14.65TYC 2419-00693-1 11.8 13.8 29 2.3 1.648 -2.798 13.45 -60.5121 30.734 117.57 -23.44 4.1313 0.04816 0.12915 -6.75903 2.52033 -0.00017 -0.00075 2000 55.90704520121219.00000311.035430 72.158594 14.1384830.11341143 2.7730687 2.458571010.3 5.00.15 RATE 2.1343380 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.049 0.039 87 2.68 0.041 0 0 2 3 056278.0020121221_0693-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Dec 16, 19:02 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org