IOTA/IOTA-ES occultation update for (2228) Soyuz-Apollo / TYC 1392-00540-1 event on 2012 Nov 02, 05:07 UT Visible from Europe, NE Canada Summary ------- On 2012 Nov 02 UT, the 28 km diameter asteroid (2228) Soyuz-Apollo will occult a 10.4 mag star in the constellation Cancer for observers along a path across Europe, NE Canada. In the case of an occultation, the combined light of the asteroid and the star will drop by 6.0 mag to 16.4 mag (the magnitude of the asteroid) for at most 1.8 seconds. This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Hugh Harris, historical astrometry from the MPC files (via AstDys), and the following catalogs for the star position: UCAC. The event at a glimpse ---------------------- * Rank: 27 * date and approx. time of event: 2012 Nov 02, 05:02 - 2012 Nov 02, 05:08 UT * geocentric midpoint of event [JD]: 2456233.71397083 * magnitude of target star: 10.4 * magnitude drop [mag]: 6.0 * estimated maximum duration [s]: 1.8 * Moon: 90 % sunlit, 51° distance * Sun: 92° distance * rough path description: Europe, NE Canada The occultation path -------------------- * approximate projected width [km]: 35 * 1 sigma uncertainty interval [path widths]: +/- 2.50 * 1 sigma uncertainty interval [seconds]: +/- 5.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .053 +/- .040) * 1 sigma uncertainty ellipse (major, minor, PA): ( .053", .040", 99° ) * approx speed of asteroid's shadow [km/s]: 16.0978 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1392-00540-1 by 2228 Soyuz-Apollo on 2012 Nov 2 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 - 97 0 0 49 6 7 5 2 52 0 64 -53 48 55 29 49 16 47 .. .. .. 50 10 34 - 96 0 0 49 25 26 5 2 52 1 65 -53 49 14 48 49 36 5 .. .. .. 50 29 45 - 95 0 0 49 44 27 5 2 52 2 65 -53 49 33 50 49 55 4 .. .. .. 50 48 39 - 94 0 0 50 3 10 5 2 53 2 66 -53 49 52 35 50 13 46 .. .. .. 51 7 15 - 93 0 0 50 21 35 5 2 53 3 67 -53 50 11 1 50 32 10 .. .. .. 51 25 32 - 92 0 0 50 39 42 5 2 53 4 68 -53 50 29 9 50 50 16 .. .. .. 51 43 31 - 91 0 0 50 57 31 5 2 54 4 69 -53 50 47 0 51 8 4 .. .. .. 52 1 12 - 90 0 0 51 15 1 5 2 54 5 69 -53 51 4 31 51 25 33 .. .. .. 52 18 35 - 89 0 0 51 32 13 5 2 55 6 70 -53 51 21 45 51 42 43 50 29 45 52 35 38 - 88 0 0 51 49 7 5 2 56 7 71 -53 51 38 40 51 59 35 50 46 47 52 52 23 - 87 0 0 52 5 42 5 2 56 7 72 -52 51 55 16 52 16 9 51 3 30 53 8 50 - 86 0 0 52 21 58 5 2 57 8 73 -52 52 11 34 52 32 24 51 19 54 53 24 57 - 85 0 0 52 37 55 5 2 58 9 73 -52 52 27 32 52 48 20 51 36 0 53 40 46 - 84 0 0 52 53 34 5 2 59 9 74 -52 52 43 13 53 3 57 51 51 48 53 56 16 - 83 0 0 53 8 54 5 3 0 10 75 -52 52 58 34 53 19 16 52 7 16 54 11 28 - 82 0 0 53 23 56 5 3 1 10 76 -51 53 13 37 53 34 16 52 22 26 54 26 20 - 81 0 0 53 38 38 5 3 2 11 77 -51 53 28 21 53 48 57 52 37 17 54 40 54 - 80 0 0 53 53 2 5 3 3 12 77 -51 53 42 46 54 3 19 52 51 50 54 55 9 - 79 0 0 54 7 7 5 3 4 12 78 -51 53 56 53 54 17 23 53 6 3 55 9 5 - 78 0 0 54 20 54 5 3 5 13 79 -51 54 10 41 54 31 8 53 19 58 55 22 42 - 77 0 0 54 34 22 5 3 6 14 80 -50 54 24 10 54 44 35 53 33 35 55 36 1 - 76 0 0 54 47 31 5 3 8 14 81 -50 54 37 21 54 57 42 53 46 53 55 49 2 - 75 0 0 55 0 22 5 3 9 15 82 -50 54 50 13 55 10 32 53 59 52 56 1 43 - 74 0 0 55 12 54 5 3 11 15 82 -49 55 2 47 55 23 2 54 12 33 56 14 7 - 73 0 0 55 25 8 5 3 12 16 83 -49 55 15 2 55 35 15 54 24 55 56 26 12 - 72 0 0 55 37 3 5 3 13 17 84 -49 55 26 59 55 47 9 54 36 59 56 37 58 - 71 0 0 55 48 40 5 3 15 17 85 -49 55 38 37 55 58 44 54 48 44 56 49 27 - 70 0 0 55 59 59 5 3 17 18 86 -48 55 49 58 56 10 2 55 0 11 57 0 37 - 69 0 0 56 11 0 5 3 18 18 87 -48 56 1 0 56 21 1 55 11 20 57 11 30 - 68 0 0 56 21 43 5 3 20 19 88 -48 56 11 44 56 31 43 55 22 11 57 22 4 - 67 0 0 56 32 8 5 3 21 19 89 -47 56 22 10 56 42 6 55 32 44 57 32 20 - 66 0 0 56 42 15 5 3 23 20 89 -47 56 32 19 56 52 12 55 42 59 57 42 19 - 65 0 0 56 52 4 5 3 25 21 90 -47 56 42 9 57 2 0 55 52 56 57 52 0 - 64 0 0 57 1 36 5 3 27 21 91 -46 56 51 42 57 11 30 56 2 35 58 1 24 - 63 0 0 57 10 50 5 3 29 22 92 -46 57 0 57 57 20 43 56 11 56 58 10 30 - 62 0 0 57 19 46 5 3 30 22 93 -45 57 9 55 57 29 38 56 21 0 58 19 19 - 61 0 0 57 28 25 5 3 32 23 94 -45 57 18 36 57 38 16 56 29 47 58 27 51 - 60 0 0 57 36 47 5 3 34 23 95 -45 57 26 59 57 46 37 56 38 16 58 36 6 - 59 0 0 57 44 52 5 3 36 24 96 -44 57 35 4 57 54 40 56 46 27 58 44 3 - 58 0 0 57 52 39 5 3 38 24 97 -44 57 42 53 58 2 27 56 54 21 58 51 44 - 57 0 0 58 0 10 5 3 40 25 98 -44 57 50 25 58 9 56 57 1 58 58 59 7 - 56 0 0 58 7 23 5 3 42 25 99 -43 57 57 39 58 17 9 57 9 18 59 6 15 - 55 0 0 58 14 20 5 3 44 26 100 -43 58 4 37 58 24 4 57 16 21 59 13 5 - 54 0 0 58 21 0 5 3 46 26 101 -42 58 11 18 58 30 44 57 23 7 59 19 39 - 53 0 0 58 27 24 5 3 48 27 102 -42 58 17 43 58 37 6 57 29 37 59 25 56 - 52 0 0 58 33 31 5 3 50 27 103 -42 58 23 51 58 43 12 57 35 49 59 31 57 - 51 0 0 58 39 21 5 3 53 28 103 -41 58 29 42 58 49 1 57 41 45 59 37 42 - 50 0 0 58 44 55 5 3 55 28 104 -41 58 35 17 58 54 35 57 47 24 59 43 11 - 49 0 0 58 50 13 5 3 57 29 105 -40 58 40 36 58 59 52 57 52 47 59 48 24 - 48 0 0 58 55 14 5 3 59 29 106 -40 58 45 38 59 4 52 57 57 53 59 53 20 - 47 0 0 59 0 0 5 4 2 30 107 -40 58 50 24 59 9 37 58 2 43 59 58 1 - 46 0 0 59 4 29 5 4 4 30 108 -39 58 54 54 59 14 5 58 7 16 60 2 26 - 45 0 0 59 8 42 5 4 6 31 109 -39 58 59 8 59 18 18 58 11 34 60 6 35 - 44 0 0 59 12 39 5 4 9 31 110 -38 59 3 6 59 22 14 58 15 35 60 10 28 - 43 0 0 59 16 21 5 4 11 32 111 -38 59 6 48 59 25 55 58 19 20 60 14 6 - 42 0 0 59 19 46 5 4 13 32 112 -37 59 10 14 59 29 20 58 22 48 60 17 28 - 41 0 0 59 22 56 5 4 16 33 113 -37 59 13 24 59 32 29 58 26 1 60 20 34 - 40 0 0 59 25 50 5 4 18 33 115 -37 59 16 18 59 35 23 58 28 58 60 23 25 - 39 0 0 59 28 28 5 4 21 33 116 -36 59 18 57 59 38 0 58 31 39 60 26 0 - 38 0 0 59 30 51 5 4 23 34 117 -36 59 21 20 59 40 23 58 34 4 60 28 20 - 37 0 0 59 32 58 5 4 26 34 118 -35 59 23 27 59 42 29 58 36 13 60 30 25 - 36 0 0 59 34 49 5 4 28 35 119 -35 59 25 19 59 44 20 58 38 6 60 32 14 - 35 0 0 59 36 25 5 4 31 35 120 -34 59 26 55 59 45 56 58 39 44 60 33 48 - 34 0 0 59 37 45 5 4 33 36 121 -34 59 28 15 59 47 15 58 41 5 60 35 7 - 33 0 0 59 38 49 5 4 36 36 122 -34 59 29 20 59 48 20 58 42 11 60 36 10 - 32 0 0 59 39 39 5 4 39 36 123 -33 59 30 9 59 49 9 58 43 1 60 36 59 - 31 0 0 59 40 12 5 4 41 37 124 -33 59 30 43 59 49 42 58 43 36 60 37 31 - 30 0 0 59 40 30 5 4 44 37 125 -32 59 31 1 59 50 0 58 43 54 60 37 49 - 29 0 0 59 40 33 5 4 47 38 126 -32 59 31 4 59 50 3 58 43 57 60 37 52 - 28 0 0 59 40 20 5 4 49 38 127 -31 59 30 51 59 49 50 58 43 44 60 37 39 - 27 0 0 59 39 52 5 4 52 39 129 -31 59 30 23 59 49 22 58 43 15 60 37 11 - 26 0 0 59 39 8 5 4 55 39 130 -30 59 29 39 59 48 38 58 42 31 60 36 27 - 25 0 0 59 38 8 5 4 58 39 131 -30 59 28 39 59 47 38 58 41 31 60 35 28 - 24 0 0 59 36 53 5 5 1 40 132 -29 59 27 24 59 46 23 58 40 14 60 34 14 - 23 0 0 59 35 22 5 5 3 40 133 -29 59 25 53 59 44 53 58 38 42 60 32 45 - 22 0 0 59 33 36 5 5 6 41 134 -29 59 24 6 59 43 7 58 36 55 60 31 0 - 21 0 0 59 31 34 5 5 9 41 135 -28 59 22 4 59 41 5 58 34 51 60 29 0 - 20 0 0 59 29 16 5 5 12 41 137 -28 59 19 46 59 38 48 58 32 31 60 26 45 - 19 0 0 59 26 43 5 5 15 42 138 -27 59 17 12 59 36 15 58 29 55 60 24 14 - 18 0 0 59 23 54 5 5 18 42 139 -27 59 14 22 59 33 26 58 27 4 60 21 27 - 17 0 0 59 20 48 5 5 21 42 140 -26 59 11 17 59 30 21 58 23 56 60 18 25 - 16 0 0 59 17 27 5 5 24 43 141 -26 59 7 55 59 27 1 58 20 32 60 15 7 - 15 0 0 59 13 50 5 5 27 43 143 -25 59 4 18 59 23 24 58 16 51 60 11 33 - 14 0 0 59 9 57 5 5 31 44 144 -25 59 0 24 59 19 32 58 12 55 60 7 44 - 13 0 0 59 5 48 5 5 34 44 145 -24 58 56 14 59 15 23 58 8 42 60 3 38 - 12 0 0 59 1 23 5 5 37 44 146 -24 58 51 48 59 10 59 58 4 13 59 59 17 - 11 0 0 58 56 41 5 5 40 45 148 -23 58 47 6 59 6 18 57 59 27 59 54 40 - 10 0 0 58 51 43 5 5 43 45 149 -23 58 42 7 59 1 21 57 54 25 59 49 47 - 9 0 0 58 46 29 5 5 47 45 150 -22 58 36 52 58 56 7 57 49 6 59 44 37 - 8 0 0 58 40 58 5 5 50 46 151 -22 58 31 20 58 50 37 57 43 30 59 39 11 - 7 0 0 58 35 11 5 5 53 46 153 -21 58 25 32 58 44 50 57 37 37 59 33 29 - 6 0 0 58 29 6 5 5 57 46 154 -21 58 19 27 58 38 47 57 31 28 59 27 30 - 5 0 0 58 22 45 5 6 0 47 155 -20 58 13 5 58 32 27 57 25 1 59 21 15 - 4 0 0 58 16 8 5 6 4 47 157 -20 58 6 26 58 25 50 57 18 18 59 14 43 - 3 0 0 58 9 13 5 6 7 47 158 -19 57 59 30 58 18 56 57 11 17 59 7 54 - 2 0 0 58 2 1 5 6 11 48 159 -19 57 52 17 58 11 45 57 3 59 59 0 49 - 1 0 0 57 54 31 5 6 14 48 161 -18 57 44 47 58 4 17 56 56 23 58 53 26 0 0 0 57 46 45 5 6 18 48 162 -17 57 36 59 57 56 32 56 48 30 58 45 46 1 0 0 57 38 41 5 6 22 48 164 -17 57 28 54 57 48 29 56 40 19 58 37 49 2 0 0 57 30 19 5 6 25 49 165 -16 57 20 31 57 40 9 56 31 51 58 29 35 3 0 0 57 21 40 5 6 29 49 166 -16 57 11 51 57 31 31 56 23 5 58 21 3 4 0 0 57 12 43 5 6 33 49 168 -15 57 2 53 57 22 35 56 14 0 58 12 14 5 0 0 57 3 28 5 6 36 50 169 -15 56 53 37 57 13 21 56 4 38 58 3 6 6 0 0 56 53 55 5 6 40 50 171 -14 56 44 2 57 3 50 55 54 58 57 53 41 7 0 0 56 44 4 5 6 44 50 172 -14 56 34 10 56 54 0 55 44 59 57 43 58 8 0 0 56 33 55 5 6 48 50 174 -13 56 23 59 56 43 52 55 34 42 57 33 57 9 0 0 56 23 27 5 6 52 50 175 -12 56 13 30 56 33 26 55 24 6 57 23 38 10 0 0 56 12 41 5 6 56 51 177 -12 56 2 43 56 22 41 55 13 12 57 13 0 11 0 0 56 1 37 5 7 0 51 178 -11 55 51 37 56 11 38 55 1 59 57 2 4 12 0 0 55 50 13 5 7 4 51 180 -11 55 40 12 56 0 16 54 50 27 56 50 49 13 0 0 55 38 31 5 7 8 51 181 -10 55 28 28 55 48 35 54 38 36 56 39 16 14 0 0 55 26 30 5 7 12 51 183 -9 55 16 26 55 36 35 54 26 27 56 27 24 15 0 0 55 14 10 5 7 17 52 185 -9 55 4 4 55 24 16 54 13 58 56 15 12 16 0 0 55 1 30 5 7 21 52 186 -8 54 51 23 55 11 39 54 1 10 56 2 42 17 0 0 54 48 32 5 7 25 52 188 -8 54 38 23 54 58 42 53 48 3 55 49 53 18 0 0 54 35 14 5 7 29 52 189 -7 54 25 4 54 45 25 53 34 36 55 36 44 19 0 0 54 21 37 5 7 34 52 191 -6 54 11 26 54 31 50 53 20 50 55 23 17 20 0 0 54 7 40 5 7 38 52 193 -6 53 57 27 54 17 55 53 6 45 55 9 29 21 0 0 53 53 24 5 7 43 52 194 -5 53 43 10 54 3 40 52 52 20 54 55 23 22 0 0 53 38 49 5 7 47 52 196 -4 53 28 33 53 49 6 52 37 35 54 40 56 23 0 0 53 23 53 5 7 52 53 198 -4 53 13 36 53 34 12 52 22 31 54 26 10 24 0 0 53 8 39 5 7 56 53 199 -3 52 58 20 53 18 59 52 7 7 54 11 5 25 0 0 52 53 4 5 8 1 53 201 -2 52 42 43 53 3 26 51 51 23 53 55 39 26 0 0 52 37 10 5 8 5 53 203 -2 52 26 48 52 47 33 51 35 20 53 39 54 27 0 0 52 20 56 5 8 10 53 205 -1 52 10 32 52 31 21 51 18 57 53 23 50 28 0 0 52 4 22 5 8 15 53 206 0 51 53 57 52 14 48 51 2 15 53 7 25 Uncertainty in time = +/- 6 secs Prediction of 2012 Sep 3.0 Data for the target star ------------------------ * name: TYC 1392-00540-1 * constellation : Cancer * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 08 42 12.6513 DE: +16 58 47.844 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .025, .025 ) * V mag [mag]: 10.4 * B mag [mag]: 10.9 * Apparent position with proper motion RA(deg): 130.7373819586 DE(deg): 16.9314709510 * Equation of equinoxes (radians) : 0.000058033241318 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2228) Soyuz-Apollo approx. diameter [km]: 28 approx. diameter ["]: .016 distance from Earth [AU]: 2.43400 * orbital information: orbit source: Preston date of fit: 2012 Jul 10 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1211 number of rejected observations: 44 time covered by the observations: 1952 Feb 19 - 2012 Feb 02 1 sigma uncertainty ellipse (major, minor, PA): 0.047, 0.031, 102° remarks: * orbital elements for (2228) Soyuz-Apollo : Mean anomaly = 27.86042850 deg Arg. of pericenter = 285.86436369 deg Long. of node = 140.41861975 deg Inclination = 1.98854923 deg Eccentricity = 0.18523998 Semimajor axis = 3.13542298 AU Perihelion dist = 2.55461730 AU Mag: H = 11.44, G = 0.15 Epoch of elements : MJD 56233.21400000 TDT (2012 Nov 02.214) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Nov 2 2228 Soyuz-Apollo 5h 8.1m UT 10.4 8 42 12.651 16 58 47.84TYC 1392-00540-1 10.9 16.4 28 1.8 2.434 2.213 -8.33 11.6412 16.983 98.87 -14.87 5.1353 0.15293 0.58384 8.78893 -2.30462 -0.00558 0.00150 2000 27.28986220121030.00000285.864364140.418620 1.9885490.18523998 3.1354230 2.554617311.3 5.00.15 RATE 1.7752520 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.053 0.040 99 3.50 0.040 0 0 3 4 056173.0020121102_0540-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Sep 03, 22:37 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org