IOTA/IOTA-ES occultation update for (312) Pierretta / TYC 1209-01621-1 event on 2012 Nov 11, 02:04 UT Visible from Europe, S USA, Mexico Summary ------- On 2012 Nov 11 UT, the 48 km diameter asteroid (312) Pierretta will occult a 11.0 mag star in the constellation Aries for observers along a path across Europe, S USA, Mexico. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.4 mag to 13.3 mag (the magnitude of the asteroid) for at most 3.7 seconds. This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Alice Monet, historical astrometry from the MPC files (via AstDys), and the following catalogs for the star position: UCAC. The event at a glimpse ---------------------- * Rank: 70 * date and approx. time of event: 2012 Nov 11, 01:57 - 2012 Nov 11, 02:11 UT * geocentric midpoint of event [JD]: 2456242.58650833 * magnitude of target star: 11.0 * magnitude drop [mag]: 2.4 * estimated maximum duration [s]: 3.7 * Moon: 11 % sunlit, 156° distance * Sun: 163° distance * rough path description: Europe, S USA, Mexico The occultation path -------------------- * approximate projected width [km]: 53 * 1 sigma uncertainty interval [path widths]: +/- 0.83 * 1 sigma uncertainty interval [seconds]: +/- 3.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .031 +/- .027) * 1 sigma uncertainty ellipse (major, minor, PA): ( .031", .027", 76° ) * approx speed of asteroid's shadow [km/s]: 12.7553 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1209-01621-1 by 312 Pierretta on 2012 Nov 11 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 -131 0 0 16 1 48 2 11 41 18 75 -1 16 17 25 15 46 12 16 43 26 15 20 24 -130 0 0 16 27 32 2 11 37 19 75 -2 16 43 11 16 11 55 17 9 15 15 46 4 -129 0 0 16 53 27 2 11 34 20 75 -3 17 9 7 16 37 49 17 35 13 16 11 56 -128 0 0 17 19 31 2 11 31 21 76 -4 17 35 13 17 3 52 18 1 21 16 37 56 -127 0 0 17 45 44 2 11 27 22 76 -5 18 1 27 17 30 3 18 27 37 17 4 6 -126 0 0 18 12 5 2 11 23 23 76 -6 18 27 50 17 56 23 18 54 2 17 30 24 -125 0 0 18 38 34 2 11 19 24 77 -7 18 54 19 18 22 51 19 20 34 17 56 50 -124 0 0 19 5 10 2 11 15 25 77 -8 19 20 56 18 49 25 19 47 12 18 23 22 -123 0 0 19 31 51 2 11 11 26 78 -9 19 47 39 19 16 6 20 13 57 18 50 1 -122 0 0 19 58 38 2 11 6 27 78 -10 20 14 27 19 42 52 20 40 46 19 16 45 -121 0 0 20 25 30 2 11 2 28 79 -11 20 41 19 20 9 42 21 7 41 19 43 34 -120 0 0 20 52 25 2 10 57 29 79 -12 21 8 16 20 36 37 21 34 39 20 10 27 -119 0 0 21 19 24 2 10 52 30 80 -13 21 35 15 21 3 35 22 1 40 20 37 23 -118 0 0 21 46 25 2 10 47 31 80 -14 22 2 17 21 30 35 22 28 43 21 4 23 -117 0 0 22 13 28 2 10 42 32 81 -15 22 29 21 21 57 37 22 55 48 21 31 24 -116 0 0 22 40 32 2 10 37 33 81 -16 22 56 26 22 24 41 23 22 55 21 58 26 -115 0 0 23 7 37 2 10 32 34 82 -17 23 23 32 22 51 45 23 50 1 22 25 29 -114 0 0 23 34 42 2 10 26 35 82 -18 23 50 37 23 18 49 24 17 7 22 52 32 -113 0 0 24 1 45 2 10 20 36 83 -19 24 17 41 23 45 52 24 44 12 23 19 34 -112 0 0 24 28 47 2 10 15 37 84 -20 24 44 43 24 12 53 25 11 15 23 46 34 -111 0 0 24 55 46 2 10 9 38 84 -21 25 11 43 24 39 52 25 38 16 24 13 33 -110 0 0 25 22 43 2 10 3 39 85 -22 25 38 40 25 6 48 26 5 13 24 40 28 -109 0 0 25 49 35 2 9 57 40 86 -23 26 5 33 25 33 41 26 32 7 25 7 20 -108 0 0 26 16 24 2 9 51 40 86 -24 26 32 21 26 0 29 26 58 56 25 34 8 -107 0 0 26 43 7 2 9 45 41 87 -25 26 59 5 26 27 12 27 25 40 26 0 51 -106 0 0 27 9 45 2 9 39 42 88 -26 27 25 43 26 53 50 27 52 18 26 27 29 -105 0 0 27 36 17 2 9 32 43 89 -27 27 52 15 27 20 21 28 18 49 26 54 0 -104 0 0 28 2 42 2 9 26 44 90 -27 28 18 39 27 46 46 28 45 14 27 20 25 -103 0 0 28 28 59 2 9 19 45 91 -28 28 44 56 28 13 4 29 11 31 27 46 43 -102 0 0 28 55 8 2 9 13 46 92 -29 29 11 5 28 39 13 29 37 40 28 12 52 -101 0 0 29 21 9 2 9 6 46 92 -30 29 37 6 29 5 14 30 3 40 28 38 53 -100 0 0 29 47 0 2 8 59 47 93 -31 30 2 57 29 31 5 30 29 30 29 4 45 - 99 0 0 30 12 41 2 8 53 48 94 -32 30 28 38 29 56 47 30 55 11 29 30 28 - 98 0 0 30 38 13 2 8 46 49 95 -33 30 54 9 30 22 19 31 20 41 29 56 0 - 97 0 0 31 3 33 2 8 39 50 97 -34 31 19 29 30 47 40 31 46 0 30 21 22 - 96 0 0 31 28 42 2 8 32 50 98 -34 31 44 37 31 12 49 32 11 8 30 46 32 - 95 0 0 31 53 39 2 8 25 51 99 -35 32 9 34 31 37 47 32 36 4 31 11 31 - 94 0 0 32 18 24 2 8 18 52 100 -36 32 34 18 32 2 33 33 0 47 31 36 18 - 93 0 0 32 42 57 2 8 11 53 101 -37 32 58 50 32 27 6 33 25 17 32 0 52 - 92 0 0 33 7 16 2 8 4 53 103 -38 33 23 8 32 51 25 33 49 34 32 25 13 - 91 0 0 33 31 21 2 7 57 54 104 -38 33 47 12 33 15 31 34 13 37 32 49 20 - 90 0 0 33 55 12 2 7 50 55 105 -39 34 11 3 33 39 24 34 37 26 33 13 14 - 89 0 0 34 18 49 2 7 43 55 107 -40 34 34 39 34 3 1 35 1 0 33 36 53 - 88 0 0 34 42 11 2 7 36 56 108 -41 34 58 0 34 26 24 35 24 20 34 0 18 - 87 0 0 35 5 18 2 7 29 57 110 -41 35 21 5 34 49 32 35 47 24 34 23 27 - 86 0 0 35 28 9 2 7 22 57 111 -42 35 43 55 35 12 24 36 10 12 34 46 21 - 85 0 0 35 50 44 2 7 15 58 113 -43 36 6 30 35 35 1 36 32 44 35 8 59 - 84 0 0 36 13 3 2 7 8 58 114 -44 36 28 48 35 57 21 36 55 0 35 31 22 - 83 0 0 36 35 6 2 7 1 59 116 -44 36 50 49 36 19 25 37 17 0 35 53 28 - 82 0 0 36 56 52 2 6 53 60 118 -45 37 12 34 36 41 12 37 38 42 36 15 17 - 81 0 0 37 18 21 2 6 46 60 119 -46 37 34 1 37 2 42 38 0 8 36 36 49 - 80 0 0 37 39 32 2 6 39 61 121 -46 37 55 12 37 23 55 38 21 16 36 58 4 - 79 0 0 38 0 26 2 6 32 61 123 -47 38 16 4 37 44 51 38 42 6 37 19 2 - 78 0 0 38 21 3 2 6 25 61 125 -48 38 36 39 38 5 28 39 2 39 37 39 42 - 77 0 0 38 41 21 2 6 18 62 127 -48 38 56 56 38 25 48 39 22 53 38 0 4 - 76 0 0 39 1 21 2 6 11 62 129 -49 39 16 55 38 45 50 39 42 50 38 20 8 - 75 0 0 39 21 3 2 6 4 63 131 -49 39 36 36 39 5 33 40 2 28 38 39 54 - 74 0 0 39 40 27 2 5 57 63 133 -50 39 55 58 39 24 59 40 21 47 38 59 22 - 73 0 0 39 59 32 2 5 50 63 135 -51 40 15 1 39 44 5 40 40 48 39 18 31 - 72 0 0 40 18 18 2 5 43 64 137 -51 40 33 46 40 2 53 40 59 30 39 37 21 - 71 0 0 40 36 45 2 5 36 64 139 -52 40 52 11 40 21 22 41 17 53 39 55 53 - 70 0 0 40 54 54 2 5 29 64 142 -52 41 10 18 40 39 32 41 35 57 40 14 5 - 69 0 0 41 12 43 2 5 22 64 144 -53 41 28 6 40 57 23 41 53 42 40 31 59 - 68 0 0 41 30 13 2 5 16 64 146 -53 41 45 34 41 14 54 42 11 8 40 49 33 - 67 0 0 41 47 24 2 5 9 65 148 -54 42 2 44 41 32 7 42 28 14 41 6 48 - 66 0 0 42 4 16 2 5 2 65 151 -54 42 19 34 41 49 0 42 45 2 41 23 44 - 65 0 0 42 20 48 2 4 55 65 153 -55 42 36 4 42 5 34 43 1 29 41 40 21 - 64 0 0 42 37 1 2 4 49 65 155 -55 42 52 15 42 21 48 43 17 38 41 56 38 - 63 0 0 42 52 54 2 4 42 65 158 -55 43 8 7 42 37 43 43 33 27 42 12 36 - 62 0 0 43 8 28 2 4 35 65 160 -56 43 23 39 42 53 19 43 48 56 42 28 14 - 61 0 0 43 23 43 2 4 29 65 162 -56 43 38 52 43 8 35 44 4 6 42 43 33 - 60 0 0 43 38 37 2 4 22 65 164 -56 43 53 45 43 23 32 44 18 56 42 58 32 - 59 0 0 43 53 13 2 4 16 65 167 -57 44 8 19 43 38 9 44 33 27 43 13 12 - 58 0 0 44 7 29 2 4 9 65 169 -57 44 22 33 43 52 26 44 47 39 43 27 32 - 57 0 0 44 21 25 2 4 3 65 171 -57 44 36 28 44 6 24 45 1 31 43 41 33 - 56 0 0 44 35 2 2 3 57 64 173 -58 44 50 3 44 20 3 45 15 3 43 55 14 - 55 0 0 44 48 19 2 3 50 64 176 -58 45 3 19 44 33 22 45 28 16 44 8 36 - 54 0 0 45 1 17 2 3 44 64 178 -58 45 16 15 44 46 21 45 41 10 44 21 38 - 53 0 0 45 13 56 2 3 38 64 180 -58 45 28 52 44 59 1 45 53 44 44 34 21 - 52 0 0 45 26 15 2 3 32 64 182 -59 45 41 9 45 11 22 46 5 59 44 46 44 - 51 0 0 45 38 14 2 3 25 63 184 -59 45 53 8 45 23 23 46 17 54 44 58 48 - 50 0 0 45 49 55 2 3 19 63 186 -59 46 4 46 45 35 5 46 29 31 45 10 32 - 49 0 0 46 1 16 2 3 13 63 188 -59 46 16 6 45 46 28 46 40 48 45 21 57 - 48 0 0 46 12 18 2 3 7 63 190 -59 46 27 6 45 57 31 46 51 46 45 33 3 - 47 0 0 46 23 1 2 3 1 62 192 -59 46 37 48 46 8 15 47 2 24 45 43 50 - 46 0 0 46 33 24 2 2 55 62 194 -59 46 48 10 46 18 40 47 12 44 45 54 17 - 45 0 0 46 43 29 2 2 49 62 196 -60 46 58 13 46 28 46 47 22 45 46 4 25 - 44 0 0 46 53 14 2 2 44 61 198 -60 47 7 57 46 38 33 47 32 26 46 14 14 - 43 0 0 47 2 40 2 2 38 61 199 -60 47 17 22 46 48 1 47 41 49 46 23 44 - 42 0 0 47 11 48 2 2 32 61 201 -60 47 26 28 46 57 10 47 50 53 46 32 55 - 41 0 0 47 20 37 2 2 26 60 203 -60 47 35 15 47 6 0 47 59 38 46 41 47 - 40 0 0 47 29 6 2 2 21 60 204 -60 47 43 44 47 14 31 48 8 5 46 50 21 - 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Uncertainty in time = +/- 4 secs Prediction of 2012 Oct 8.0 Data for the target star ------------------------ * name: TYC 1209-01621-1 * constellation : Aries * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 01 53 38.9889 DE: +19 05 42.223 * position source: mpos:UCAC4 pm:UCAC4 * standard error: RA,DE ["]: ( .023, .024 ) * V mag [mag]: 11.0 * B mag [mag]: 11.9 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (312) Pierretta approx. diameter [km]: 48 approx. diameter ["]: .032 distance from Earth [AU]: 2.07000 * orbital information: orbit source: Preston date of fit: 2012 Oct 07 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 969 number of rejected observations: 91 time covered by the observations: 1906 Dec 21 - 2012 Sep 28 1 sigma uncertainty ellipse (major, minor, PA): 0.022, 0.012, 61° remarks: * orbital elements for (312) Pierretta : Mean anomaly = 116.15119552 deg Arg. of pericenter = 260.77509323 deg Long. of node = 6.70298820 deg Inclination = 9.02909156 deg Eccentricity = 0.15992112 Semimajor axis = 2.78251395 AU Perihelion dist = 2.33753121 AU Mag: H = 8.70, G = 0.15 Epoch of elements : MJD 56242.08600000 TDT (2012 Nov 11.086) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Nov 11 312 Pierretta 2h 4.6m UT 11.0 1 53 38.989 19 5 42.22TYC 1209-01621-1 11.9 13.3 48 3.7 2.070 -2.082 -8.00 -53.3589 19.098 144.87 -17.49 2.0762 -0.11006 0.40612 -6.94877 -1.88335 0.00174 -0.00009 2000 115.708238201211 9.00000260.775093 6.702988 9.0290920.15992112 2.7825140 2.3375312 8.9 5.00.15 RATE 2.1234800 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.031 0.027 76 1.83 0.027 0 0-1 3 056208.0020121111_1621-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Oct 07, 20:25 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org