IOTA/IOTA-ES occultation update for (2467) Kollontai / TYC 5777-00835-1 event on 2012 Oct 26, 02:38 UT Visible from SE USA, Mexico Summary ------- On 2012 Oct 26 UT, the 11 km diameter asteroid (2467) Kollontai will occult a 10.0 mag star in the constellation Aquarius for observers along a path across SE USA, Mexico. In the case of an occultation, the combined light of the asteroid and the star will drop by 5.7 mag to 15.7 mag (the magnitude of the asteroid) for at most 0.9 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: 21 * date and approx. time of event: 2012 Oct 26, 02:36 - 2012 Oct 26, 02:46 UT * geocentric midpoint of event [JD]: 2456226.61007917 * magnitude of target star: 10.0 * magnitude drop [mag]: 5.7 * estimated maximum duration [s]: 0.9 * Moon: 87 % sunlit, 32° distance * Sun: 106° distance * rough path description: SE USA, Mexico The occultation path -------------------- * approximate projected width [km]: 12 * 1 sigma uncertainty interval [path widths]: +/- 3.24 * 1 sigma uncertainty interval [seconds]: +/- 3.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .041 +/- .036) * 1 sigma uncertainty ellipse (major, minor, PA): ( .041", .036", 72° ) * approx speed of asteroid's shadow [km/s]: 12.6698 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5777-00835-1 by 2467 Kollontai on 2012 Oct 26 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 -134 0 0 7 36 58 2 36 35 63 131 -1 7 33 36 7 40 20 7 11 49 8 2 11 -133 0 0 7 54 14 2 36 44 64 133 -2 7 50 52 7 57 36 7 29 3 8 19 30 -132 0 0 8 11 51 2 36 54 65 135 -3 8 8 28 8 15 13 7 46 37 8 37 9 -131 0 0 8 29 48 2 37 3 65 137 -4 8 26 25 8 33 11 8 4 32 8 55 9 -130 0 0 8 48 5 2 37 12 65 140 -5 8 44 42 8 51 29 8 22 47 9 13 28 -129 0 0 9 6 43 2 37 21 66 142 -6 9 3 19 9 10 6 8 41 22 9 32 8 -128 0 0 9 25 39 2 37 31 66 144 -7 9 22 15 9 29 3 9 0 16 9 51 7 -127 0 0 9 44 54 2 37 40 67 147 -8 9 41 30 9 48 19 9 19 29 10 10 24 -126 0 0 10 4 28 2 37 50 67 150 -9 10 1 4 10 7 53 9 39 1 10 30 0 -125 0 0 10 24 20 2 37 59 67 152 -10 10 20 55 10 27 45 9 58 50 10 49 54 -124 0 0 10 44 29 2 38 8 67 155 -11 10 41 4 10 47 54 10 18 57 11 10 6 -123 0 0 11 4 55 2 38 18 67 158 -13 11 1 30 11 8 21 10 39 21 11 30 35 -122 0 0 11 25 38 2 38 27 67 160 -14 11 22 12 11 29 4 11 0 2 11 51 20 -121 0 0 11 46 37 2 38 37 67 163 -15 11 43 11 11 50 3 11 20 58 12 12 21 -120 0 0 12 7 52 2 38 46 67 166 -16 12 4 25 12 11 18 11 42 11 12 33 37 -119 0 0 12 29 21 2 38 56 67 169 -17 12 25 54 12 32 48 12 3 38 12 55 9 -118 0 0 12 51 5 2 39 5 67 172 -18 12 47 38 12 54 32 12 25 20 13 16 55 -117 0 0 13 13 3 2 39 14 67 174 -19 13 9 35 13 16 30 12 47 15 13 38 55 -116 0 0 13 35 14 2 39 24 66 177 -20 13 31 46 13 38 41 13 9 24 14 1 8 -115 0 0 13 57 37 2 39 33 66 179 -21 13 54 10 14 1 5 13 31 46 14 23 34 -114 0 0 14 20 13 2 39 43 66 182 -22 14 16 45 14 23 41 13 54 20 14 46 11 -113 0 0 14 43 1 2 39 52 65 184 -23 14 39 33 14 46 29 14 17 6 15 9 1 -112 0 0 15 5 59 2 40 1 65 187 -24 15 2 31 15 9 27 14 40 2 15 32 1 -111 0 0 15 29 7 2 40 10 64 189 -25 15 25 39 15 32 36 15 3 9 15 55 11 -110 0 0 15 52 26 2 40 20 64 191 -26 15 48 57 15 55 55 15 26 26 16 18 31 -109 0 0 16 15 53 2 40 29 63 193 -27 16 12 24 16 19 22 15 49 51 16 42 0 -108 0 0 16 39 28 2 40 38 62 195 -28 16 35 59 16 42 57 16 13 25 17 5 36 -107 0 0 17 3 11 2 40 47 62 197 -29 16 59 42 17 6 41 16 37 7 17 29 21 -106 0 0 17 27 1 2 40 56 61 199 -30 17 23 32 17 30 31 17 0 55 17 53 12 -105 0 0 17 50 58 2 41 4 60 201 -31 17 47 28 17 54 27 17 24 50 18 17 10 -104 0 0 18 15 0 2 41 13 60 202 -32 18 11 30 18 18 30 17 48 51 18 41 13 -103 0 0 18 39 6 2 41 22 59 204 -33 18 35 36 18 42 37 18 12 57 19 5 21 -102 0 0 19 3 18 2 41 31 58 205 -34 18 59 47 19 6 48 18 37 7 19 29 33 -101 0 0 19 27 32 2 41 39 57 207 -35 19 24 2 19 31 3 19 1 21 19 53 49 -100 0 0 19 51 50 2 41 47 57 208 -36 19 48 19 19 55 21 19 25 38 20 18 8 - 99 0 0 20 16 10 2 41 56 56 210 -37 20 12 39 20 19 41 19 49 57 20 42 28 - 98 0 0 20 40 31 2 42 4 55 211 -38 20 37 0 20 44 2 20 14 17 21 6 50 - 97 0 0 21 4 53 2 42 12 54 212 -39 21 1 23 21 8 24 20 38 39 21 31 13 - 96 0 0 21 29 16 2 42 20 53 213 -40 21 25 45 21 32 47 21 3 1 21 55 36 - 95 0 0 21 53 38 2 42 28 52 214 -41 21 50 7 21 57 9 21 27 22 22 19 58 - 94 0 0 22 17 58 2 42 36 51 215 -42 22 14 27 22 21 29 21 51 43 22 44 19 - 93 0 0 22 42 17 2 42 43 51 217 -43 22 38 46 22 45 48 22 16 1 23 8 38 - 92 0 0 23 6 33 2 42 51 50 218 -44 23 3 2 23 10 4 22 40 18 23 32 54 - 91 0 0 23 30 46 2 42 58 49 219 -45 23 27 15 23 34 17 23 4 31 23 57 7 - 90 0 0 23 54 56 2 43 6 48 220 -46 23 51 25 23 58 27 23 28 40 24 21 17 - 89 0 0 24 19 1 2 43 13 47 220 -47 24 15 30 24 22 32 23 52 45 24 45 21 - 88 0 0 24 43 1 2 43 20 46 221 -48 24 39 30 24 46 32 24 16 46 25 9 21 - 87 0 0 25 6 55 2 43 27 45 222 -48 25 3 24 25 10 26 24 40 40 25 33 15 - 86 0 0 25 30 43 2 43 34 44 223 -49 25 27 12 25 34 14 25 4 29 25 57 2 - 85 0 0 25 54 24 2 43 40 43 224 -50 25 50 53 25 57 55 25 28 10 26 20 43 - 84 0 0 26 17 58 2 43 47 42 225 -51 26 14 27 26 21 28 25 51 45 26 44 16 - 83 0 0 26 41 23 2 43 53 41 225 -52 26 37 53 26 44 54 26 15 11 27 7 41 - 82 0 0 27 4 41 2 43 59 41 226 -52 27 1 10 27 8 11 26 38 29 27 30 57 - 81 0 0 27 27 49 2 44 5 40 227 -53 27 24 19 27 31 19 27 1 38 27 54 5 - 80 0 0 27 50 47 2 44 11 39 228 -54 27 47 17 27 54 18 27 24 38 28 17 2 - 79 0 0 28 13 36 2 44 17 38 229 -55 28 10 6 28 17 6 27 47 28 28 39 50 - 78 0 0 28 36 14 2 44 23 37 229 -55 28 32 44 28 39 44 28 10 7 29 2 26 - 77 0 0 28 58 41 2 44 28 36 230 -56 28 55 11 29 2 11 28 32 35 29 24 52 - 76 0 0 29 20 56 2 44 33 35 231 -57 29 17 27 29 24 26 28 54 52 29 47 6 - 75 0 0 29 43 0 2 44 39 34 231 -57 29 39 31 29 46 29 29 16 57 30 9 8 - 74 0 0 30 4 51 2 44 44 33 232 -58 30 1 22 30 8 20 29 38 49 30 30 58 - 73 0 0 30 26 30 2 44 49 32 233 -59 30 23 1 30 29 59 30 0 29 30 52 35 - 72 0 0 30 47 55 2 44 53 31 233 -59 30 44 26 30 51 24 30 21 56 31 13 59 - 71 0 0 31 9 7 2 44 58 30 234 -60 31 5 38 31 12 35 30 43 9 31 35 9 - 70 0 0 31 30 4 2 45 2 29 235 -60 31 26 36 31 33 33 31 4 9 31 56 5 - 69 0 0 31 50 48 2 45 7 29 235 -61 31 47 20 31 54 16 31 24 54 32 16 47 - 68 0 0 32 11 17 2 45 11 28 236 -61 32 7 49 32 14 45 31 45 25 32 37 14 - 67 0 0 32 31 31 2 45 15 27 237 -62 32 28 4 32 34 59 32 5 41 32 57 26 - 66 0 0 32 51 30 2 45 19 26 237 -62 32 48 3 32 54 58 32 25 42 33 17 23 - 65 0 0 33 11 14 2 45 22 25 238 -63 33 7 47 33 14 41 32 45 28 33 37 5 - 64 0 0 33 30 42 2 45 26 24 239 -63 33 27 15 33 34 8 33 4 58 33 56 31 - 63 0 0 33 49 53 2 45 29 23 239 -63 33 46 27 33 53 20 33 24 12 34 15 40 - 62 0 0 34 8 49 2 45 33 22 240 -64 34 5 23 34 12 15 33 43 9 34 34 34 - 61 0 0 34 27 28 2 45 36 21 240 -64 34 24 3 34 30 54 34 1 51 34 53 11 - 60 0 0 34 45 51 2 45 39 21 241 -64 34 42 25 34 49 17 34 20 15 35 11 32 - 59 0 0 35 3 57 2 45 42 20 242 -64 35 0 32 35 7 22 34 38 23 35 29 35 - 58 0 0 35 21 46 2 45 45 19 242 -65 35 18 21 35 25 11 34 56 14 35 47 22 - 57 0 0 35 39 17 2 45 47 18 243 -65 35 35 53 35 42 42 35 13 48 36 4 51 - 56 0 0 35 56 32 2 45 50 17 244 -65 35 53 7 35 59 56 35 31 5 36 22 3 - 55 0 0 36 13 28 2 45 52 16 244 -65 36 10 4 36 16 53 35 48 4 36 38 58 - 54 0 0 36 30 8 2 45 54 15 245 -65 36 26 44 36 33 32 36 4 45 36 55 35 - 53 0 0 36 46 29 2 45 56 14 245 -65 36 43 6 36 49 53 36 21 9 37 11 54 - 52 0 0 37 2 33 2 45 58 14 246 -65 36 59 10 37 5 56 36 37 15 37 27 55 - 51 0 0 37 18 19 2 46 0 13 247 -65 37 14 56 37 21 42 36 53 3 37 43 39 - 50 0 0 37 33 46 2 46 2 12 247 -65 37 30 24 37 37 9 37 8 33 37 59 4 - 49 0 0 37 48 56 2 46 3 11 248 -65 37 45 34 37 52 18 37 23 45 38 14 12 - 48 0 0 38 3 47 2 46 5 10 249 -64 38 0 26 38 7 10 37 38 39 38 29 1 - 47 0 0 38 18 21 2 46 6 9 249 -64 38 14 59 38 21 42 37 53 14 38 43 32 - 46 0 0 38 32 36 2 46 7 9 250 -64 38 29 14 38 35 57 38 7 31 38 57 45 - 45 0 0 38 46 32 2 46 9 8 250 -64 38 43 11 38 49 53 38 21 30 39 11 39 - 44 0 0 39 0 11 2 46 10 7 251 -64 38 56 50 39 3 31 38 35 11 39 25 15 - 43 0 0 39 13 30 2 46 10 6 252 -63 39 10 10 39 16 51 38 48 33 39 38 33 - 42 0 0 39 26 32 2 46 11 5 252 -63 39 23 12 39 29 52 39 1 36 39 51 32 - 41 0 0 39 39 15 2 46 12 5 253 -63 39 35 55 39 42 35 39 14 22 40 4 13 - 40 0 0 39 51 39 2 46 12 4 254 -62 39 48 20 39 54 59 39 26 48 40 16 35 - 39 0 0 40 3 46 2 46 13 3 254 -62 40 0 26 40 7 5 39 38 56 40 28 39 - 38 0 0 40 15 33 2 46 13 2 255 -62 40 12 14 40 18 52 39 50 46 40 40 25 - 37 0 0 40 27 2 2 46 13 1 256 -61 40 23 44 40 30 21 40 2 17 40 51 52 - 36 0 0 40 38 13 2 46 14 1 256 -61 40 34 55 40 41 32 .. .. .. 41 3 1 Uncertainty in time = +/- 3 secs Prediction of 2012 Sep 27.0 Data for the target star ------------------------ * name: TYC 5777-00835-1 * constellation : Aquarius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 21 19 18.9673 DE: -10 05 31.993 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .025, .025 ) * V mag [mag]: 10.0 * B mag [mag]: 10.9 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2467) Kollontai approx. diameter [km]: 11 approx. diameter ["]: .011 distance from Earth [AU]: 1.34300 * orbital information: orbit source: Preston date of fit: 2012 Sep 26 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1055 number of rejected observations: 24 time covered by the observations: 1933 Jul 27 - 2012 Sep 13 1 sigma uncertainty ellipse (major, minor, PA): 0.033, 0.026, 62° remarks: * orbital elements for (2467) Kollontai : Mean anomaly = 16.34659989 deg Arg. of pericenter = 17.84766036 deg Long. of node = 309.27443061 deg Inclination = 5.79692077 deg Eccentricity = 0.15979774 Semimajor axis = 2.21329503 AU Perihelion dist = 1.85961548 AU Mag: H = 12.37, G = 0.15 Epoch of elements : MJD 56226.11000000 TDT (2012 Oct 26.110) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Oct 26 2467 Kollontai 2h 38.5m UT 10.0 21 19 18.967-10 5 31.99TYC 5777-00835-1 10.9 15.7 11 0.9 1.343 3.004 15.00 -114.6799 -10.096 136.37 -12.54 2.6419 -0.12139 0.36545 6.77433 2.29091 0.00478 0.00139 2000 14.51771520121020.00000 17.847660309.274431 5.7969210.15979774 2.2132950 1.859615512.4 5.00.15 RATE 2.9932650 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.041 0.036 72 4.24 0.037 0 0 3-3 056197.0020121026_0835-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Sep 26, 22:46 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org