IOTA/IOTA-ES occultation update for (1793) Zoya / TYC 5803-01708-1 event on 2012 Nov 22, 16:17 UT Visible from Russia, Europe Summary ------- On 2012 Nov 22 UT, the 19 km diameter asteroid (1793) Zoya will occult a 10.2 mag star in the constellation Aquarius for observers along a path across Russia, Europe. In the case of an occultation, the combined light of the asteroid and the star will drop by 7.2 mag to 17.4 mag (the magnitude of the asteroid) for at most 1.1 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: 22 * date and approx. time of event: 2012 Nov 22, 16:17 - 2012 Nov 22, 16:21 UT * geocentric midpoint of event [JD]: 2456254.17887083 * magnitude of target star: 10.2 * magnitude drop [mag]: 7.2 * estimated maximum duration [s]: 1.1 * Moon: 71 % sunlit, 25° distance * Sun: 90° distance * rough path description: Russia, Europe The occultation path -------------------- * approximate projected width [km]: 33 * 1 sigma uncertainty interval [path widths]: +/- 3.05 * 1 sigma uncertainty interval [seconds]: +/- 3.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .037 +/- .037) * 1 sigma uncertainty ellipse (major, minor, PA): ( .037", .037", 82° ) * approx speed of asteroid's shadow [km/s]: 17.0295 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5803-01708-1 by 1793 Zoya on 2012 Nov 22 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 ' " Longitude Longitude Longitude Longitude 81 41 35 70 0 0 16 21 6 1 235 -37 82 30 16 80 53 17 ... .. .. 76 5 50 77 22 52 69 0 0 16 21 5 3 231 -37 78 7 33 76 38 27 ... .. .. 72 12 33 Latitude Latitude Latitude Latitude 76 0 0 68 39 29 16 21 5 4 230 -37 68 28 37 68 50 26 .. .. .. 69 58 34 75 0 0 68 24 14 16 21 4 4 229 -37 68 13 19 68 35 13 .. .. .. 69 43 36 74 0 0 68 8 39 16 21 4 5 228 -37 67 57 42 68 19 40 66 52 11 69 28 17 73 0 0 67 52 44 16 21 4 5 227 -37 67 41 44 68 3 47 66 36 1 69 12 38 72 0 0 67 36 28 16 21 3 6 226 -37 67 25 26 67 47 33 66 19 31 68 56 38 71 0 0 67 19 51 16 21 2 6 225 -37 67 8 48 67 30 58 66 2 41 68 40 16 70 0 0 67 2 54 16 21 2 7 224 -36 66 51 49 67 14 3 65 45 31 68 23 34 69 0 0 66 45 37 16 21 1 7 223 -36 66 34 29 66 56 48 65 28 1 68 6 30 68 0 0 66 27 58 16 21 0 8 222 -36 66 16 49 66 39 11 65 10 11 67 49 5 67 0 0 66 9 59 16 21 0 8 222 -36 65 58 49 66 21 14 64 52 1 67 31 19 66 0 0 65 51 40 16 20 59 9 221 -36 65 40 28 66 2 56 64 33 31 67 13 12 65 0 0 65 33 0 16 20 58 9 220 -36 65 21 47 65 44 18 64 14 41 66 54 43 64 0 0 65 14 0 16 20 57 10 219 -36 65 2 45 65 25 19 63 55 31 66 35 54 63 0 0 64 54 39 16 20 56 10 218 -35 64 43 23 65 6 0 63 36 2 66 16 43 62 0 0 64 34 59 16 20 55 11 217 -35 64 23 41 64 46 20 63 16 13 65 57 11 61 0 0 64 14 58 16 20 54 11 216 -35 64 3 40 64 26 21 62 56 6 65 37 19 60 0 0 63 54 38 16 20 52 12 215 -35 63 43 19 64 6 2 62 35 39 65 17 6 59 0 0 63 33 59 16 20 51 12 214 -34 63 22 38 63 45 23 62 14 54 64 56 33 58 0 0 63 13 0 16 20 50 13 213 -34 63 1 39 63 24 25 61 53 50 64 35 40 57 0 0 62 51 43 16 20 48 13 212 -34 62 40 21 63 3 8 61 32 28 64 14 27 56 0 0 62 30 7 16 20 46 14 211 -34 62 18 45 62 41 33 61 10 49 63 52 55 55 0 0 62 8 13 16 20 45 14 210 -33 61 56 50 62 19 39 60 48 53 63 31 4 54 0 0 61 46 1 16 20 43 15 209 -33 61 34 38 61 57 28 60 26 40 63 8 54 53 0 0 61 23 33 16 20 41 16 208 -33 61 12 10 61 35 0 60 4 10 62 46 26 52 0 0 61 0 47 16 20 39 16 207 -32 60 49 24 61 12 14 59 41 25 62 23 41 51 0 0 60 37 46 16 20 37 17 206 -32 60 26 23 60 49 13 59 18 24 62 0 38 50 0 0 60 14 29 16 20 35 17 205 -32 60 3 6 60 25 55 58 55 8 61 37 20 49 0 0 59 50 57 16 20 33 18 205 -31 59 39 35 60 2 23 58 31 39 61 13 45 48 0 0 59 27 11 16 20 31 18 204 -31 59 15 49 59 38 36 58 7 56 60 49 55 47 0 0 59 3 11 16 20 28 19 203 -30 58 51 50 59 14 36 57 44 0 60 25 50 46 0 0 58 38 58 16 20 26 20 202 -30 58 27 38 58 50 22 57 19 52 60 1 32 45 0 0 58 14 33 16 20 23 20 201 -29 58 3 13 58 25 57 56 55 33 59 37 0 44 0 0 57 49 56 16 20 20 21 200 -29 57 38 38 58 1 19 56 31 3 59 12 16 43 0 0 57 25 9 16 20 18 21 199 -28 57 13 52 57 36 31 56 6 23 58 47 21 42 0 0 57 0 12 16 20 15 22 198 -28 56 48 56 57 11 33 55 41 34 58 22 15 41 0 0 56 35 6 16 20 12 22 197 -27 56 23 51 56 46 25 55 16 36 57 56 59 40 0 0 56 9 52 16 20 9 23 196 -27 55 58 39 56 21 10 54 51 31 57 31 34 39 0 0 55 44 31 16 20 5 24 195 -26 55 33 19 55 55 47 54 26 20 57 6 2 38 0 0 55 19 3 16 20 2 24 193 -26 55 7 52 55 30 17 54 1 3 56 40 22 37 0 0 54 53 30 16 19 59 25 192 -25 54 42 21 55 4 42 53 35 40 56 14 36 36 0 0 54 27 52 16 19 55 25 191 -25 54 16 45 54 39 3 53 10 14 55 48 44 35 0 0 54 2 10 16 19 51 26 190 -24 53 51 5 54 13 19 52 44 45 55 22 49 34 0 0 53 36 26 16 19 48 26 189 -23 53 25 23 53 47 33 52 19 14 54 56 50 33 0 0 53 10 41 16 19 44 27 188 -23 52 59 39 53 21 46 51 53 42 54 30 49 32 0 0 52 44 54 16 19 40 27 187 -22 52 33 55 52 55 57 51 28 9 54 4 47 31 0 0 52 19 8 16 19 36 28 186 -21 52 8 11 52 30 9 51 2 38 53 38 45 30 0 0 51 53 23 16 19 32 28 185 -21 51 42 28 52 4 22 50 37 7 53 12 43 29 0 0 51 27 41 16 19 28 29 184 -20 51 16 48 51 38 37 50 11 40 52 46 44 28 0 0 51 2 1 16 19 24 29 183 -19 50 51 11 51 12 55 49 46 16 52 20 47 27 0 0 50 36 26 16 19 19 30 181 -19 50 25 38 50 47 18 49 20 57 51 54 54 26 0 0 50 10 56 16 19 15 30 180 -18 50 0 10 50 21 46 48 55 43 51 29 6 25 0 0 49 45 33 16 19 10 30 179 -17 49 34 49 49 56 20 48 30 36 51 3 24 24 0 0 49 20 16 16 19 6 31 178 -17 49 9 35 49 31 0 48 5 36 50 37 49 23 0 0 48 55 8 16 19 1 31 177 -16 48 44 29 49 5 50 47 40 44 50 12 22 22 0 0 48 30 8 16 18 56 32 176 -15 48 19 32 48 40 48 47 16 2 49 47 3 21 0 0 48 5 19 16 18 51 32 174 -14 47 54 46 48 15 56 46 51 29 49 21 55 20 0 0 47 40 41 16 18 46 32 173 -14 47 30 10 47 51 15 46 27 8 48 56 58 19 0 0 47 16 14 16 18 42 33 172 -13 47 5 46 47 26 46 46 2 59 48 32 12 18 0 0 46 52 0 16 18 37 33 171 -12 46 41 35 47 2 29 45 39 2 48 7 39 17 0 0 46 28 0 16 18 31 33 169 -11 46 17 37 46 38 27 45 15 20 47 43 19 16 0 0 46 4 15 16 18 26 33 168 -10 45 53 54 46 14 39 44 51 51 47 19 14 15 0 0 45 40 44 16 18 21 34 167 -10 45 30 26 45 51 6 44 28 38 46 55 25 14 0 0 45 17 30 16 18 16 34 166 -9 45 7 15 45 27 49 44 5 41 46 31 52 13 0 0 44 54 33 16 18 11 34 164 -8 44 44 20 45 4 49 43 43 2 46 8 35 12 0 0 44 31 54 16 18 5 34 163 -7 44 21 43 44 42 7 43 20 39 45 45 37 11 0 0 44 9 33 16 18 0 34 162 -6 43 59 25 44 19 44 42 58 36 45 22 57 10 0 0 43 47 32 16 17 55 34 161 -6 43 37 26 43 57 40 42 36 51 45 0 37 9 0 0 43 25 50 16 17 49 35 159 -5 43 15 47 43 35 56 42 15 26 44 38 37 8 0 0 43 4 29 16 17 44 35 158 -4 42 54 28 43 14 33 41 54 22 44 16 58 7 0 0 42 43 30 16 17 39 35 157 -3 42 33 31 42 53 31 41 33 39 43 55 41 6 0 0 42 22 53 16 17 33 35 156 -2 42 12 56 42 32 51 41 13 18 43 34 45 5 0 0 42 2 38 16 17 28 35 154 -1 41 52 44 42 12 34 40 53 19 43 14 13 4 0 0 41 42 46 16 17 22 35 153 -1 41 32 55 41 52 41 40 33 43 42 54 5 Uncertainty in time = +/- 3 secs Prediction of 2012 Nov 16.0 Data for the target star ------------------------ * name: TYC 5803-01708-1 * constellation : Aquarius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 22 09 45.2943 DE: -09 57 51.436 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .030, .034 ) * V mag [mag]: 10.2 * B mag [mag]: 11.5 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1793) Zoya approx. diameter [km]: 19 approx. diameter ["]: .012 distance from Earth [AU]: 2.21900 * orbital information: orbit source: Preston date of fit: 2012 Oct 25 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1215 number of rejected observations: 59 time covered by the observations: 1933 Oct 21 - 2012 Oct 22 1 sigma uncertainty ellipse (major, minor, PA): 0.023, 0.014, 70° remarks: * orbital elements for (1793) Zoya : Mean anomaly = 162.53523074 deg Arg. of pericenter = 323.17845491 deg Long. of node = 226.05739343 deg Inclination = 1.50900325 deg Eccentricity = 0.09825883 Semimajor axis = 2.22328358 AU Perihelion dist = 2.00482633 AU Mag: H = 12.23, G = 0.15 Epoch of elements : MJD 56253.67900000 TDT (2012 Nov 22.679) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Nov 22 1793 Zoya 16h 17.6m UT 10.2 22 9 45.294- 9 57 51.44TYC 5803-01708-1 11.5 17.4 19 1.1 2.219 2.453 11.72 25.9917 -9.967 -67.81 -20.31 16.2929 -0.25192 0.78099 9.14562 2.95741 0.00538 0.00203 2000 161.44142220121119.00000323.178455226.057393 1.5090030.09825883 2.2232836 2.004826312.6 5.00.15 RATE 2.9731150 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.037 0.037 82 4.05 0.036 0 0 3 4 056247.0020121122_1708-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Oct 25, 21:47 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org