IOTA/IOTA-ES occultation update for (345) Tercidina / TYC 5222-01283-1 event on 2012 Nov 25, 18:19 UT Visible from SW Asia, Europe, N Africa Summary ------- On 2012 Nov 25 UT, the 108 km diameter asteroid (345) Tercidina will occult a 12.2 mag star in the constellation Aquarius for observers along a path across SW Asia, Europe, N Africa. In the case of an occultation, the combined light of the asteroid and the star will drop by 1.6 mag to 13.5 mag (the magnitude of the asteroid) for at most 4.9 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: 83 * date and approx. time of event: 2012 Nov 25, 18:19 - 2012 Nov 25, 18:23 UT * geocentric midpoint of event [JD]: 2456257.26358333 * magnitude of target star: 12.2 * magnitude drop [mag]: 1.6 * estimated maximum duration [s]: 4.9 * Moon: 93 % sunlit, 66° distance * Sun: 83° distance * rough path description: SW Asia, Europe, N Africa The occultation path -------------------- * approximate projected width [km]: 140 * 1 sigma uncertainty interval [path widths]: +/- 0.64 * 1 sigma uncertainty interval [seconds]: +/- 2.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .040 +/- .043) * 1 sigma uncertainty ellipse (major, minor, PA): ( .043", .040", 360° ) * approx speed of asteroid's shadow [km/s]: 21.8206 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5222-01283-1 by 345 Tercidina on 2012 Nov 25 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 - 22 0 0 32 32 23 18 19 16 50 166 0 31 54 25 33 10 42 31 6 18 34 0 16 - 21 0 0 32 38 31 18 19 20 50 168 -1 32 0 32 33 16 50 31 12 25 34 6 26 - 20 0 0 32 44 48 18 19 25 51 169 -2 32 6 48 33 23 8 31 18 40 34 12 44 - 19 0 0 32 51 13 18 19 29 51 171 -3 32 13 12 33 29 33 31 25 3 34 19 11 - 18 0 0 32 57 46 18 19 33 51 173 -3 32 19 45 33 36 7 31 31 35 34 25 45 - 17 0 0 33 4 27 18 19 38 51 174 -4 32 26 25 33 42 49 31 38 14 34 32 28 - 16 0 0 33 11 16 18 19 42 51 176 -5 32 33 14 33 49 39 31 45 2 34 39 19 - 15 0 0 33 18 13 18 19 47 50 177 -6 32 40 10 33 56 37 31 51 57 34 46 18 - 14 0 0 33 25 17 18 19 51 50 179 -7 32 47 14 34 3 42 31 59 0 34 53 24 - 13 0 0 33 32 29 18 19 55 50 181 -8 32 54 25 34 10 55 32 6 10 35 0 38 - 12 0 0 33 39 48 18 20 0 50 182 -8 33 1 43 34 18 14 32 13 27 35 7 58 - 11 0 0 33 47 14 18 20 4 50 184 -9 33 9 8 34 25 41 32 20 52 35 15 26 - 10 0 0 33 54 47 18 20 8 50 185 -10 33 16 41 34 33 15 32 28 23 35 23 1 - 9 0 0 34 2 27 18 20 13 50 187 -11 33 24 20 34 40 56 32 36 2 35 30 43 - 8 0 0 34 10 13 18 20 17 49 188 -12 33 32 5 34 48 43 32 43 46 35 38 31 - 7 0 0 34 18 6 18 20 21 49 190 -13 33 39 57 34 56 36 32 51 37 35 46 25 - 6 0 0 34 26 5 18 20 25 49 191 -13 33 47 56 35 4 36 32 59 35 35 54 25 - 5 0 0 34 34 10 18 20 30 48 193 -14 33 56 0 35 12 41 33 7 38 36 2 32 - 4 0 0 34 42 20 18 20 34 48 194 -15 34 4 10 35 20 52 33 15 47 36 10 44 - 3 0 0 34 50 37 18 20 38 48 196 -16 34 12 25 35 29 9 33 24 2 36 19 2 - 2 0 0 34 58 58 18 20 42 47 197 -17 34 20 46 35 37 32 33 32 22 36 27 25 - 1 0 0 35 7 25 18 20 46 47 199 -18 34 29 12 35 45 59 33 40 47 36 35 53 0 0 0 35 15 57 18 20 50 47 200 -18 34 37 43 35 54 32 33 49 18 36 44 27 1 0 0 35 24 34 18 20 54 46 201 -19 34 46 20 36 3 9 33 57 53 36 53 5 2 0 0 35 33 15 18 20 58 46 203 -20 34 55 0 36 11 51 34 6 33 37 1 48 3 0 0 35 42 1 18 21 2 45 204 -21 35 3 45 36 20 37 34 15 17 37 10 35 4 0 0 35 50 50 18 21 6 45 205 -22 35 12 35 36 29 28 34 24 6 37 19 26 5 0 0 35 59 44 18 21 10 44 207 -23 35 21 28 36 38 22 34 32 59 37 28 21 6 0 0 36 8 42 18 21 14 44 208 -23 35 30 25 36 47 20 34 41 55 37 37 20 7 0 0 36 17 43 18 21 18 43 209 -24 35 39 26 36 56 22 34 50 55 37 46 23 8 0 0 36 26 48 18 21 21 43 210 -25 35 48 30 37 5 27 34 59 59 37 55 29 9 0 0 36 35 56 18 21 25 42 211 -26 35 57 38 37 14 36 35 9 6 38 4 38 10 0 0 36 45 7 18 21 29 42 213 -27 36 6 48 37 23 47 35 18 16 38 13 50 11 0 0 36 54 21 18 21 32 41 214 -28 36 16 2 37 33 1 35 27 29 38 23 5 12 0 0 37 3 37 18 21 36 40 215 -28 36 25 18 37 42 18 35 36 44 38 32 22 13 0 0 37 12 56 18 21 39 40 216 -29 36 34 36 37 51 37 35 46 2 38 41 42 14 0 0 37 22 17 18 21 43 39 217 -30 36 43 56 38 0 58 35 55 22 38 51 3 15 0 0 37 31 39 18 21 46 39 218 -31 36 53 19 38 10 22 36 4 44 39 0 27 16 0 0 37 41 4 18 21 50 38 219 -32 37 2 43 38 19 46 36 14 8 39 9 52 17 0 0 37 50 30 18 21 53 37 220 -33 37 12 9 38 29 13 36 23 33 39 19 19 18 0 0 37 59 57 18 21 56 37 221 -33 37 21 36 38 38 40 36 33 0 39 28 47 19 0 0 38 9 26 18 21 59 36 222 -34 37 31 4 38 48 9 36 42 28 39 38 16 20 0 0 38 18 55 18 22 2 35 223 -35 37 40 33 38 57 39 36 51 57 39 47 46 21 0 0 38 28 26 18 22 6 35 224 -36 37 50 3 39 7 9 37 1 27 39 57 17 22 0 0 38 37 56 18 22 9 34 225 -37 37 59 34 39 16 40 37 10 57 40 6 48 23 0 0 38 47 27 18 22 11 33 226 -37 38 9 5 39 26 11 37 20 28 40 16 19 24 0 0 38 56 59 18 22 14 33 227 -38 38 18 36 39 35 43 37 29 59 40 25 51 25 0 0 39 6 30 18 22 17 32 228 -39 38 28 7 39 45 14 37 39 30 40 35 22 26 0 0 39 16 1 18 22 20 31 229 -40 38 37 38 39 54 45 37 49 0 40 44 53 27 0 0 39 25 31 18 22 23 31 229 -40 38 47 8 40 4 15 37 58 31 40 54 23 28 0 0 39 35 1 18 22 25 30 230 -41 38 56 38 40 13 45 38 8 1 41 3 53 29 0 0 39 44 29 18 22 28 29 231 -42 39 6 7 40 23 14 38 17 29 41 13 22 30 0 0 39 53 57 18 22 31 29 232 -43 39 15 35 40 32 41 38 26 57 41 22 49 31 0 0 40 3 24 18 22 33 28 233 -43 39 25 1 40 42 8 38 36 24 41 32 16 32 0 0 40 12 49 18 22 35 27 234 -44 39 34 27 40 51 33 38 45 50 41 41 41 33 0 0 40 22 13 18 22 38 26 235 -45 39 43 50 41 0 57 38 55 14 41 51 4 34 0 0 40 31 35 18 22 40 26 235 -46 39 53 12 41 10 18 39 4 36 42 0 25 35 0 0 40 40 54 18 22 42 25 236 -46 40 2 33 41 19 38 39 13 56 42 9 45 36 0 0 40 50 12 18 22 44 24 237 -47 40 11 50 41 28 55 39 23 14 42 19 2 37 0 0 40 59 28 18 22 46 24 238 -48 40 21 6 41 38 11 39 32 30 42 28 17 38 0 0 41 8 41 18 22 48 23 238 -48 40 30 19 41 47 23 39 41 44 42 37 29 39 0 0 41 17 51 18 22 50 22 239 -49 40 39 30 41 56 33 39 50 55 42 46 39 40 0 0 41 26 58 18 22 52 21 240 -50 40 48 38 42 5 40 40 0 3 42 55 46 41 0 0 41 36 3 18 22 54 21 241 -50 40 57 43 42 14 45 40 9 8 43 4 49 42 0 0 41 45 4 18 22 56 20 242 -51 41 6 44 42 23 46 40 18 11 43 13 50 43 0 0 41 54 2 18 22 58 19 242 -52 41 15 43 42 32 43 40 27 10 43 22 47 44 0 0 42 2 57 18 22 59 18 243 -52 41 24 38 42 41 37 40 36 5 43 31 40 45 0 0 42 11 48 18 23 1 18 244 -53 41 33 29 42 50 28 40 44 57 43 40 30 46 0 0 42 20 35 18 23 2 17 244 -54 41 42 17 42 59 15 40 53 45 43 49 17 47 0 0 42 29 19 18 23 4 16 245 -54 41 51 1 43 7 58 41 2 30 43 57 59 48 0 0 42 37 58 18 23 5 16 246 -55 41 59 41 43 16 36 41 11 10 44 6 37 49 0 0 42 46 33 18 23 6 15 247 -55 42 8 16 43 25 11 41 19 47 44 15 11 50 0 0 42 55 4 18 23 8 14 247 -56 42 16 48 43 33 41 41 28 19 44 23 40 51 0 0 43 3 30 18 23 9 13 248 -57 42 25 14 43 42 7 41 36 46 44 32 5 52 0 0 43 11 52 18 23 10 13 249 -57 42 33 37 43 50 28 41 45 9 44 40 25 53 0 0 43 20 9 18 23 11 12 250 -58 42 41 54 43 58 44 41 53 27 44 48 41 54 0 0 43 28 21 18 23 12 11 250 -58 42 50 7 44 6 56 42 1 41 44 56 52 55 0 0 43 36 28 18 23 13 10 251 -59 42 58 15 44 15 2 42 9 49 45 4 57 56 0 0 43 44 30 18 23 14 10 252 -59 43 6 17 44 23 4 42 17 53 45 12 58 57 0 0 43 52 27 18 23 14 9 252 -60 43 14 15 44 31 0 42 25 51 45 20 53 58 0 0 44 0 18 18 23 15 8 253 -60 43 22 7 44 38 50 42 33 44 45 28 43 59 0 0 44 8 4 18 23 16 7 254 -60 43 29 54 44 46 36 42 41 32 45 36 27 60 0 0 44 15 44 18 23 16 7 254 -61 43 37 35 44 54 15 42 49 14 45 44 6 61 0 0 44 23 19 18 23 17 6 255 -61 43 45 10 45 1 49 42 56 50 45 51 39 62 0 0 44 30 48 18 23 17 5 256 -62 43 52 40 45 9 18 43 4 20 45 59 6 63 0 0 44 38 11 18 23 18 5 257 -62 44 0 4 45 16 40 43 11 45 46 6 27 64 0 0 44 45 28 18 23 18 4 257 -62 44 7 21 45 23 56 43 19 4 46 13 43 65 0 0 44 52 39 18 23 18 3 258 -63 44 14 33 45 31 7 .. .. .. 46 20 52 66 0 0 44 59 44 18 23 19 2 259 -63 44 21 39 45 38 11 .. .. .. 46 27 55 67 0 0 45 6 43 18 23 19 2 259 -63 44 28 38 45 45 8 .. .. .. 46 34 52 68 0 0 45 13 35 18 23 19 1 260 -63 44 35 31 45 52 0 .. .. .. 46 41 42 69 0 0 45 20 21 18 23 19 0 261 -64 44 42 18 45 58 45 .. .. .. 46 48 26 Uncertainty in time = +/- 3 secs Prediction of 2012 Nov 16.0 Data for the target star ------------------------ * name: TYC 5222-01283-1 * constellation : Aquarius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 21 45 52.9325 DE: -06 21 07.318 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .038, .042 ) * V mag [mag]: 12.2 * B mag [mag]: 12.9 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (345) Tercidina approx. diameter [km]: 108 approx. diameter ["]: .067 distance from Earth [AU]: 2.22800 * orbital information: orbit source: Preston date of fit: 2012 Nov 16 source of used astrometry: FASTT TMO MPC (via Astdys) number of used observations: 1002 number of rejected observations: 143 time covered by the observations: 1901 Mar 27 - 2012 Nov 12 1 sigma uncertainty ellipse (major, minor, PA): 0.012, 0.008, 76° remarks: * orbital elements for (345) Tercidina : Mean anomaly = 274.46978625 deg Arg. of pericenter = 231.08704072 deg Long. of node = 212.68677240 deg Inclination = 9.75028587 deg Eccentricity = 0.06119020 Semimajor axis = 2.32482138 AU Perihelion dist = 2.18256510 AU Mag: H = 8.74, G = 0.10 Epoch of elements : MJD 56256.76400000 TDT (2012 Nov 25.764) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Nov 25 345 Tercidina 18h 19.6m UT 12.2 21 45 52.933- 6 21 7.32TYC 5222-01283-1 12.9 13.5 108 4.9 2.228 3.242 5.23 -13.5139 -6.353 -98.08 -20.93 18.3260 -0.06736 0.62953 12.24471 1.32479 0.00529 0.00196 2000 272.58907020121119.00000231.087041212.686772 9.7502860.06119020 2.3248214 2.1825651 8.7 5.00.10 RATE 2.7804790 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.043 0.040 360 1.64 0.043 0 0-5 2 056247.0020121125_1283-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Nov 16, 08:52 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org