IOTA/IOTA-ES occultation update for (602) Marianna / 2UCAC 29384584 event on 2012 Aug 02, 19:20 UT Visible from Japan, China, Russia Summary ------- On 2012 Aug 02 UT, the 130 km diameter asteroid (602) Marianna will occult a 11.9 mag star in the constellation Aquarius for observers along a path across Japan, China, Russia. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.8 mag to 12.0 mag (the magnitude of the asteroid) for at most 17.8 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: 99 * date and approx. time of event: 2012 Aug 02, 19:17 - 2012 Aug 02, 19:33 UT * geocentric midpoint of event [JD]: 2456142.30800833 * magnitude of target star: 11.9 * magnitude drop [mag]: 0.8 * estimated maximum duration [s]: 17.8 * Moon: 99 % sunlit, 25° distance * Sun: 148° distance * rough path description: Japan, China, Russia The occultation path -------------------- * approximate projected width [km]: 197 * 1 sigma uncertainty interval [path widths]: +/- 0.33 * 1 sigma uncertainty interval [seconds]: +/- 5.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .040 +/- .035) * 1 sigma uncertainty ellipse (major, minor, PA): ( .041", .033", 66° ) * approx speed of asteroid's shadow [km/s]: 7.2905 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of 2UCAC 29384584 by 602 Marianna on 2012 Aug 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 36 0 0 69 35 5 19 33 3 2 117 0 70 35 11 68 36 17 71 15 35 67 58 8 37 0 0 69 25 8 19 33 3 3 118 0 70 25 28 68 26 5 71 6 4 67 47 47 38 0 0 69 14 52 19 33 2 3 119 -1 70 15 29 68 15 35 70 56 15 67 37 8 39 0 0 69 4 19 19 33 2 3 120 -1 70 5 11 68 4 47 70 46 8 67 26 10 40 0 0 68 53 27 19 33 1 4 121 -1 69 54 35 67 53 40 70 35 44 67 14 55 41 0 0 68 42 17 19 33 1 4 122 -2 69 43 41 67 42 15 70 25 1 67 3 20 42 0 0 68 30 48 19 33 0 5 123 -2 69 32 28 67 30 31 70 14 0 66 51 27 43 0 0 68 19 0 19 32 59 5 124 -2 69 20 57 67 18 28 70 2 39 66 39 14 44 0 0 68 6 53 19 32 58 5 125 -3 69 9 6 67 6 6 69 51 0 66 26 42 45 0 0 67 54 27 19 32 57 6 126 -3 68 56 55 66 53 24 69 39 1 66 13 51 46 0 0 67 41 40 19 32 56 6 127 -3 68 44 25 66 40 22 69 26 42 66 0 40 47 0 0 67 28 34 19 32 55 7 128 -4 68 31 35 66 27 1 69 14 4 65 47 8 48 0 0 67 15 7 19 32 54 7 129 -4 68 18 25 66 13 19 69 1 5 65 33 17 49 0 0 67 1 20 19 32 53 8 130 -4 68 4 54 65 59 16 68 47 45 65 19 5 50 0 0 66 47 12 19 32 51 8 130 -5 67 51 2 65 44 53 68 34 5 65 4 33 51 0 0 66 32 43 19 32 50 8 131 -5 67 36 49 65 30 10 68 20 4 64 49 40 52 0 0 66 17 53 19 32 48 9 132 -5 67 22 16 65 15 5 68 5 41 64 34 26 53 0 0 66 2 42 19 32 46 9 133 -6 67 7 20 64 59 39 67 50 57 64 18 51 54 0 0 65 47 9 19 32 44 10 134 -6 66 52 3 64 43 52 67 35 51 64 2 55 55 0 0 65 31 15 19 32 42 10 135 -6 66 36 24 64 27 43 67 20 23 63 46 37 56 0 0 65 14 58 19 32 40 11 136 -7 66 20 23 64 11 13 67 4 33 63 29 59 57 0 0 64 58 20 19 32 38 11 137 -7 66 4 0 63 54 21 66 48 20 63 12 58 58 0 0 64 41 20 19 32 36 12 138 -8 65 47 14 63 37 8 66 31 45 62 55 36 59 0 0 64 23 58 19 32 33 12 139 -8 65 30 6 63 19 32 66 14 47 62 37 53 60 0 0 64 6 13 19 32 31 13 140 -8 65 12 36 63 1 35 65 57 26 62 19 48 61 0 0 63 48 6 19 32 28 13 141 -9 64 54 42 62 43 16 65 39 42 62 1 21 62 0 0 63 29 37 19 32 25 14 141 -9 64 36 26 62 24 35 65 21 36 61 42 32 63 0 0 63 10 46 19 32 22 14 142 -9 64 17 48 62 5 32 65 3 6 61 23 22 64 0 0 62 51 32 19 32 19 15 143 -10 63 58 46 61 46 7 64 44 13 61 3 51 65 0 0 62 31 56 19 32 15 15 144 -10 63 39 22 61 26 20 64 24 57 60 43 57 66 0 0 62 11 58 19 32 12 16 145 -10 63 19 34 61 6 12 64 5 17 60 23 43 67 0 0 61 51 38 19 32 8 16 146 -11 62 59 25 60 45 42 63 45 15 60 3 7 68 0 0 61 30 56 19 32 4 17 147 -11 62 38 52 60 24 51 63 24 50 59 42 11 69 0 0 61 9 51 19 32 0 18 148 -11 62 17 57 60 3 38 63 4 2 59 20 53 70 0 0 60 48 26 19 31 56 18 149 -12 61 56 40 59 42 5 62 42 51 58 59 15 71 0 0 60 26 39 19 31 51 19 150 -12 61 35 1 59 20 11 62 21 17 58 37 16 72 0 0 60 4 31 19 31 47 19 151 -13 61 13 0 58 57 56 61 59 22 58 14 57 73 0 0 59 42 2 19 31 42 20 152 -13 60 50 38 58 35 21 61 37 4 57 52 19 74 0 0 59 19 12 19 31 37 20 153 -13 60 27 54 58 12 26 61 14 24 57 29 21 75 0 0 58 56 2 19 31 32 21 154 -14 60 4 50 57 49 12 60 51 24 57 6 4 76 0 0 58 32 33 19 31 26 22 155 -14 59 41 25 57 25 39 60 28 2 56 42 28 77 0 0 58 8 44 19 31 21 22 155 -14 59 17 39 57 1 47 60 4 19 56 18 35 78 0 0 57 44 37 19 31 15 23 156 -14 58 53 34 56 37 37 59 40 16 55 54 23 79 0 0 57 20 11 19 31 9 23 157 -15 58 29 10 56 13 9 59 15 53 55 29 54 80 0 0 56 55 27 19 31 3 24 158 -15 58 4 28 55 48 24 58 51 12 55 5 9 81 0 0 56 30 26 19 30 56 24 159 -15 57 39 27 55 23 23 58 26 11 54 40 7 82 0 0 56 5 8 19 30 49 25 160 -16 57 14 9 54 58 6 58 0 53 54 14 50 83 0 0 55 39 34 19 30 43 26 161 -16 56 48 34 54 32 33 57 35 17 53 49 18 84 0 0 55 13 45 19 30 36 26 162 -16 56 22 42 54 6 46 57 9 24 53 23 32 85 0 0 54 47 41 19 30 28 27 163 -17 55 56 36 53 40 44 56 43 16 52 57 32 86 0 0 54 21 23 19 30 21 27 164 -17 55 30 14 53 14 29 56 16 52 52 31 20 87 0 0 53 54 51 19 30 13 28 165 -17 55 3 38 52 48 2 55 50 13 52 4 55 88 0 0 53 28 7 19 30 5 28 166 -17 54 36 50 52 21 23 55 23 21 51 38 19 89 0 0 53 1 12 19 29 57 29 167 -18 54 9 48 51 54 32 54 56 15 51 11 32 90 0 0 52 34 5 19 29 48 30 168 -18 53 42 35 51 27 32 54 28 58 50 44 35 91 0 0 52 6 49 19 29 40 30 169 -18 53 15 11 51 0 22 54 1 29 50 17 29 92 0 0 51 39 23 19 29 31 31 170 -18 52 47 38 50 33 3 53 33 49 49 50 14 93 0 0 51 11 48 19 29 22 31 172 -18 52 19 55 50 5 36 53 6 1 49 22 52 94 0 0 50 44 6 19 29 13 32 173 -19 51 52 4 49 38 3 52 38 3 48 55 24 95 0 0 50 16 17 19 29 3 32 174 -19 51 24 5 49 10 23 52 9 58 48 27 50 96 0 0 49 48 23 19 28 53 33 175 -19 50 56 1 48 42 38 51 41 46 48 0 10 97 0 0 49 20 24 19 28 44 33 176 -19 50 27 51 48 14 48 51 13 28 47 32 27 98 0 0 48 52 20 19 28 33 34 177 -19 49 59 36 47 46 55 50 45 6 47 4 40 99 0 0 48 24 14 19 28 23 34 178 -19 49 31 18 47 18 59 50 16 39 46 36 51 100 0 0 47 56 5 19 28 13 35 179 -19 49 2 57 46 51 2 49 48 10 46 9 1 101 0 0 47 27 55 19 28 2 35 181 -19 48 34 35 46 23 4 49 19 38 45 41 10 102 0 0 46 59 45 19 27 51 36 182 -19 48 6 11 45 55 6 48 51 6 45 13 19 103 0 0 46 31 35 19 27 40 36 183 -19 47 37 48 45 27 8 48 22 34 44 45 29 104 0 0 46 3 27 19 27 29 37 184 -19 47 9 26 44 59 13 47 54 2 44 17 41 105 0 0 45 35 21 19 27 18 37 185 -19 46 41 6 44 31 20 47 25 32 43 49 57 106 0 0 45 7 19 19 27 6 37 187 -19 46 12 50 44 3 30 46 57 5 43 22 15 107 0 0 44 39 20 19 26 55 38 188 -19 45 44 37 43 35 45 46 28 42 42 54 39 108 0 0 44 11 27 19 26 43 38 189 -19 45 16 28 43 8 5 46 0 23 42 27 7 109 0 0 43 43 39 19 26 31 39 190 -19 44 48 26 42 40 32 45 32 10 41 59 42 110 0 0 43 15 58 19 26 19 39 192 -19 44 20 30 42 13 5 45 4 4 41 32 24 111 0 0 42 48 25 19 26 7 39 193 -19 43 52 42 41 45 46 44 36 4 41 5 13 112 0 0 42 21 0 19 25 54 39 194 -19 43 25 1 41 18 35 44 8 13 40 38 12 113 0 0 41 53 45 19 25 42 40 195 -19 42 57 30 40 51 34 43 40 31 40 11 19 114 0 0 41 26 39 19 25 29 40 197 -19 42 30 9 40 24 42 43 12 59 39 44 37 115 0 0 40 59 44 19 25 17 40 198 -18 42 2 59 39 58 2 42 45 38 39 18 5 116 0 0 40 33 1 19 25 4 40 199 -18 41 36 0 39 31 33 42 18 28 38 51 46 117 0 0 40 6 30 19 24 51 41 201 -18 41 9 14 39 5 17 41 51 31 38 25 38 118 0 0 39 40 12 19 24 38 41 202 -18 40 42 40 38 39 13 41 24 47 37 59 44 119 0 0 39 14 8 19 24 25 41 203 -17 40 16 21 38 13 24 40 58 16 37 34 3 120 0 0 38 48 19 19 24 12 41 205 -17 39 50 16 37 47 49 40 32 0 37 8 37 121 0 0 38 22 44 19 23 59 41 206 -17 39 24 26 37 22 29 40 6 0 36 43 26 122 0 0 37 57 26 19 23 46 41 207 -17 38 58 52 36 57 24 39 40 15 36 18 30 123 0 0 37 32 24 19 23 33 41 209 -16 38 33 35 36 32 36 39 14 47 35 53 51 124 0 0 37 7 39 19 23 20 41 210 -16 38 8 35 36 8 5 38 49 37 35 29 29 125 0 0 36 43 12 19 23 7 41 211 -16 37 43 53 35 43 52 38 24 45 35 5 24 126 0 0 36 19 3 19 22 54 41 213 -15 37 19 30 35 19 57 38 0 11 34 41 38 127 0 0 35 55 13 19 22 41 41 214 -15 36 55 25 34 56 21 37 35 56 34 18 10 128 0 0 35 31 43 19 22 28 41 215 -14 36 31 41 34 33 4 37 12 1 33 55 2 129 0 0 35 8 33 19 22 15 41 216 -14 36 8 16 34 10 7 36 48 27 33 32 13 130 0 0 34 45 43 19 22 2 40 218 -14 35 45 12 33 47 30 36 25 13 33 9 44 131 0 0 34 23 14 19 21 49 40 219 -13 35 22 30 33 25 15 36 2 22 32 47 37 132 0 0 34 1 7 19 21 36 40 220 -13 35 0 10 33 3 20 35 39 52 32 25 50 133 0 0 33 39 23 19 21 23 40 221 -12 34 38 11 32 41 48 35 17 44 32 4 26 134 0 0 33 18 0 19 21 10 40 223 -12 34 16 36 32 20 38 34 56 0 31 43 23 135 0 0 32 57 1 19 20 57 39 224 -11 33 55 24 31 59 50 34 34 39 31 22 43 136 0 0 32 36 25 19 20 44 39 225 -11 33 34 36 31 39 26 34 13 41 31 2 27 137 0 0 32 16 13 19 20 32 39 226 -10 33 14 11 31 19 26 33 53 9 30 42 34 138 0 0 31 56 26 19 20 19 38 227 -9 32 54 12 30 59 50 33 33 1 30 23 4 139 0 0 31 37 3 19 20 7 38 228 -9 32 34 37 30 40 38 33 13 18 30 3 59 140 0 0 31 18 5 19 19 54 37 229 -8 32 15 28 30 21 51 32 54 1 29 45 19 141 0 0 30 59 33 19 19 42 37 230 -8 31 56 45 30 3 29 32 35 10 29 27 4 142 0 0 30 41 26 19 19 30 37 232 -7 31 38 27 29 45 33 32 16 45 29 9 14 143 0 0 30 23 46 19 19 18 36 233 -6 31 20 37 29 28 3 31 58 47 28 51 50 144 0 0 30 6 33 19 19 6 36 234 -6 31 3 13 29 10 59 31 41 15 28 34 52 145 0 0 29 49 46 19 18 55 35 235 -5 30 46 16 28 54 21 31 24 12 28 18 21 146 0 0 29 33 26 19 18 43 35 235 -5 30 29 47 28 38 11 31 7 36 28 2 16 147 0 0 29 17 34 19 18 32 34 236 -4 30 13 45 28 22 28 30 51 28 27 46 38 148 0 0 29 2 10 19 18 20 34 237 -3 29 58 12 28 7 12 30 35 49 27 31 28 149 0 0 28 47 14 19 18 9 33 238 -3 29 43 7 27 52 24 30 20 38 27 16 45 150 0 0 28 32 46 19 17 58 32 239 -2 29 28 31 27 38 4 30 5 56 27 2 30 151 0 0 28 18 47 19 17 47 32 240 -1 29 14 24 27 24 13 29 51 43 26 48 44 152 0 0 28 5 17 19 17 37 31 241 0 29 0 46 27 10 50 29 38 0 26 35 25 Uncertainty in time = +/- 6 secs Prediction of 2012 Jul 21.0 Data for the target star ------------------------ * name: 2UCAC 29384584 * constellation : Aquarius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 22 56 49.4035 DE: -07 23 08.708 * position source: mpos:UCAC4 pm:UCAC4 * standard error: RA,DE ["]: ( .026, .030 ) * V mag [mag]: 11.9 * B mag [mag]: 0.0 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (602) Marianna approx. diameter [km]: 130 approx. diameter ["]: .114 distance from Earth [AU]: 1.57200 * orbital information: orbit source: Preston date of fit: 2012 Jul 21 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 899 number of rejected observations: 85 time covered by the observations: 1906 Feb 23 - 2012 Jul 17 1 sigma uncertainty ellipse (major, minor, PA): 0.033, 0.015, 52° remarks: * orbital elements for (602) Marianna : Mean anomaly = 330.73237629 deg Arg. of pericenter = 46.15261962 deg Long. of node = 331.59852564 deg Inclination = 15.07643740 deg Eccentricity = 0.24544978 Semimajor axis = 3.08934989 AU Perihelion dist = 2.33106963 AU Mag: H = 8.41, G = 0.15 Epoch of elements : MJD 56141.80600000 TDT (2012 Aug 02.806) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Aug 2 602 Marianna 19h 23.5m UT 11.9 22 56 49.404- 7 23 8.712UCAC 29384584 0.0 12.0 130 17.8 1.572 -1.430 8.87 101.5340 -7.387 -109.33 17.50 19.3922 0.28992 0.69459 -3.79734 1.58525 -0.00267 -0.00106 2000 330.4045672012 8 1.00000 46.152620331.598526 15.0764370.24544978 3.0893499 2.3310696 8.3 5.00.15 RATE 1.8151120 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.041 0.033 66 1.33 0.037 0 0-5 2 056129.0020120802_384584 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Jul 21, 14:01 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org