IOTA/IOTA-ES occultation update for (261) Prymno / TYC 0032-00866-1 event on 2007 Oct 07, 07:51 UT Visible from USA, Mexico Summary ------- On 2007 Oct 07 UT, the 51 km diameter asteroid (261) Prymno will occult a 10.3 mag star in the constellation Pisces for observers along a path across USA, Mexico. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.5 mag to 12.7 mag (the magnitude of the asteroid) for at most 4.6 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: 90 * date and approx. time of event: 2007 Oct 07, 07:42 - 2007 Oct 07, 08:00 UT * magnitude of target star: 10.3 * magnitude drop [mag]: 2.5 * estimated maximum duration [s]: 4.6 * Moon: 14 % sunlit, 125° distance * Sun: 167° distance * rough path description: USA, Mexico The occultation path -------------------- * approximate projected width [km]: 55 * 1 sigma uncertainty interval [path widths]: +/- 0.52 * 1 sigma uncertainty interval [seconds]: +/- 2.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .029 +/- .025) * 1 sigma uncertainty ellipse (major, minor, PA): ( .030", .024", 77° ) * approx speed of asteroid's shadow [km/s]: 11.0754 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0032-00866-1 by 261 Prymno on 2007 Oct 07 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 160 0 0 - 0 57 7 8 0 8 0 86 -13 - 0 42 15 - 1 11 58 - 0 26 45 .. .. .. 161 0 0 - 0 52 21 8 0 7 1 86 -14 - 0 37 28 - 1 7 12 - 0 21 58 .. .. .. 162 0 0 - 0 47 9 8 0 7 2 86 -15 - 0 32 15 - 1 2 0 - 0 16 45 .. .. .. 163 0 0 - 0 41 31 8 0 7 3 86 -16 - 0 26 37 - 0 56 23 - 0 11 6 - 1 11 50 164 0 0 - 0 35 29 8 0 6 4 86 -17 - 0 20 34 - 0 50 21 - 0 5 3 - 1 5 48 165 0 0 - 0 29 1 8 0 5 5 86 -18 - 0 14 6 - 0 43 54 0 1 26 - 0 59 22 166 0 0 - 0 22 8 8 0 4 6 86 -19 - 0 7 13 - 0 37 2 0 8 20 - 0 52 31 167 0 0 - 0 14 51 8 0 3 7 86 -20 0 0 5 - 0 29 46 0 15 39 - 0 45 15 168 0 0 - 0 7 9 8 0 1 8 86 -21 0 7 48 - 0 22 4 0 23 22 - 0 37 34 169 0 0 0 0 58 8 0 0 9 86 -22 0 15 55 - 0 13 58 0 31 30 - 0 29 29 170 0 0 0 9 29 7 59 58 10 86 -23 0 24 27 - 0 5 28 0 40 3 - 0 20 59 171 0 0 0 18 24 7 59 56 11 86 -24 0 33 23 0 3 26 0 49 0 - 0 12 5 172 0 0 0 27 43 7 59 54 12 86 -25 0 42 43 0 12 45 0 58 21 - 0 2 48 173 0 0 0 37 27 7 59 51 13 86 -26 0 52 28 0 22 28 1 8 6 0 6 54 174 0 0 0 47 34 7 59 49 14 86 -27 1 2 36 0 32 34 1 18 15 0 16 59 175 0 0 0 58 5 7 59 46 15 86 -28 1 13 8 0 43 4 1 28 48 0 27 28 176 0 0 1 8 59 7 59 43 16 86 -29 1 24 3 0 53 57 1 39 44 0 38 21 177 0 0 1 20 17 7 59 40 17 86 -30 1 35 21 1 5 14 1 51 4 0 49 36 178 0 0 1 31 57 7 59 37 18 86 -31 1 47 3 1 16 53 2 2 47 1 1 15 179 0 0 1 44 1 7 59 33 19 86 -32 1 59 8 1 28 56 2 14 52 1 13 16 180 0 0 1 56 27 7 59 30 20 86 -33 2 11 35 1 41 21 2 27 21 1 25 40 -179 0 0 2 9 16 7 59 26 21 86 -34 2 24 25 1 54 9 2 40 12 1 38 27 -178 0 0 2 22 27 7 59 22 22 86 -35 2 37 37 2 7 19 2 53 25 1 51 36 -177 0 0 2 36 0 7 59 18 23 86 -36 2 51 11 2 20 51 3 7 1 2 5 7 -176 0 0 2 49 55 7 59 13 24 87 -37 3 5 8 2 34 45 3 20 58 2 18 59 -175 0 0 3 4 12 7 59 9 25 87 -38 3 19 25 2 49 0 3 35 17 2 33 13 -174 0 0 3 18 50 7 59 4 26 87 -39 3 34 4 3 3 37 3 49 57 2 47 49 -173 0 0 3 33 49 7 58 59 27 87 -40 3 49 5 3 18 34 4 4 59 3 2 45 -172 0 0 3 49 9 7 58 54 28 87 -41 4 4 26 3 33 53 4 20 21 3 18 3 -171 0 0 4 4 49 7 58 49 29 87 -42 4 20 8 3 49 32 4 36 4 3 33 41 -170 0 0 4 20 50 7 58 44 30 88 -43 4 36 10 4 5 32 4 52 8 3 49 39 -169 0 0 4 37 11 7 58 38 31 88 -44 4 52 32 4 21 51 5 8 31 4 5 57 -168 0 0 4 53 51 7 58 33 32 88 -45 5 9 14 4 38 31 5 25 14 4 22 35 -167 0 0 5 10 51 7 58 27 33 88 -46 5 26 15 4 55 29 5 42 17 4 39 32 -166 0 0 5 28 10 7 58 21 34 88 -47 5 43 35 5 12 47 5 59 39 4 56 48 -165 0 0 5 45 48 7 58 14 35 89 -48 6 1 14 5 30 24 6 17 19 5 14 24 -164 0 0 6 3 45 7 58 8 36 89 -49 6 19 12 5 48 19 6 35 19 5 32 17 -163 0 0 6 21 59 7 58 2 37 89 -50 6 37 28 6 6 32 6 53 36 5 50 29 -162 0 0 6 40 31 7 57 55 38 90 -51 6 56 2 6 25 3 7 12 11 6 8 59 -161 0 0 6 59 21 7 57 48 39 90 -52 7 14 53 6 43 51 7 31 3 6 27 46 -160 0 0 7 18 28 7 57 41 40 90 -53 7 34 1 7 2 57 7 50 13 6 46 50 -159 0 0 7 37 51 7 57 34 41 91 -54 7 53 26 7 22 19 8 9 39 7 6 11 -158 0 0 7 57 31 7 57 27 42 91 -55 8 13 7 7 41 57 8 29 22 7 25 48 -157 0 0 8 17 27 7 57 20 43 92 -55 8 33 4 8 1 52 8 49 20 7 45 41 -156 0 0 8 37 38 7 57 12 44 92 -56 8 53 17 8 22 2 9 9 34 8 5 50 -155 0 0 8 58 5 7 57 5 45 93 -57 9 13 44 8 42 27 9 30 4 8 26 13 -154 0 0 9 18 46 7 56 57 45 93 -58 9 34 27 9 3 7 9 50 47 8 46 52 -153 0 0 9 39 42 7 56 49 46 94 -59 9 55 24 9 24 1 10 11 46 9 7 45 -152 0 0 10 0 51 7 56 41 47 94 -60 10 16 34 9 45 9 10 32 57 9 28 51 -151 0 0 10 22 14 7 56 33 48 95 -61 10 37 58 10 6 31 10 54 23 9 50 12 -150 0 0 10 43 49 7 56 25 49 96 -62 10 59 35 10 28 5 11 16 1 10 11 45 -149 0 0 11 5 38 7 56 16 50 97 -63 11 21 25 10 49 52 11 37 52 10 33 30 -148 0 0 11 27 38 7 56 8 51 97 -64 11 43 26 11 11 51 11 59 55 10 55 28 -147 0 0 11 49 50 7 55 59 52 98 -64 12 5 39 11 34 2 12 22 9 11 17 38 -146 0 0 12 12 12 7 55 51 53 99 -65 12 28 3 11 56 23 12 44 34 11 39 58 -145 0 0 12 34 46 7 55 42 54 100 -66 12 50 38 12 18 56 13 7 10 12 2 29 -144 0 0 12 57 30 7 55 33 54 101 -67 13 13 23 12 41 38 13 29 56 12 25 11 -143 0 0 13 20 23 7 55 24 55 102 -68 13 36 17 13 4 30 13 52 51 12 48 1 -142 0 0 13 43 25 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-47 35 2 22 34 30 47 35 18 50 34 14 24 - 85 0 0 35 4 25 7 46 37 53 218 -46 35 20 12 34 48 40 35 36 39 34 32 19 - 84 0 0 35 22 1 7 46 30 53 219 -46 35 37 47 35 6 17 35 54 12 34 49 57 - 83 0 0 35 39 20 7 46 23 52 221 -45 35 55 5 35 23 37 36 11 29 35 7 19 - 82 0 0 35 56 23 7 46 15 51 222 -44 36 12 6 35 40 41 36 28 29 35 24 24 - 81 0 0 36 13 9 7 46 9 50 223 -43 36 28 50 35 57 29 36 45 12 35 41 13 - 80 0 0 36 29 37 7 46 2 50 224 -42 36 45 18 36 13 59 37 1 38 35 57 44 - 79 0 0 36 45 49 7 45 55 49 225 -42 37 1 28 36 30 12 37 17 47 36 13 59 - 78 0 0 37 1 44 7 45 48 48 226 -41 37 17 21 36 46 8 37 33 38 36 29 56 - 77 0 0 37 17 21 7 45 42 47 227 -40 37 32 57 37 1 46 37 49 13 36 45 36 - 76 0 0 37 32 41 7 45 35 47 228 -39 37 48 16 37 17 8 38 4 30 37 0 59 - 75 0 0 37 47 43 7 45 29 46 229 -38 38 3 16 37 32 11 38 19 29 37 16 4 - 74 0 0 38 2 27 7 45 23 45 230 -38 38 18 0 37 46 57 38 34 11 37 30 51 - 73 0 0 38 16 54 7 45 17 44 230 -37 38 32 25 38 1 25 38 48 35 37 45 21 - 72 0 0 38 31 3 7 45 11 44 231 -36 38 46 33 38 15 36 39 2 41 37 59 33 - 71 0 0 38 44 54 7 45 5 43 232 -35 39 0 22 38 29 28 39 16 29 38 13 27 - 70 0 0 38 58 28 7 44 59 42 233 -34 39 13 54 38 43 3 39 30 0 38 27 3 - 69 0 0 39 11 43 7 44 53 41 234 -34 39 27 8 38 56 19 39 43 12 38 40 21 - 68 0 0 39 24 40 7 44 48 41 235 -33 39 40 4 39 9 18 39 56 6 38 53 21 - 67 0 0 39 37 19 7 44 42 40 236 -32 39 52 41 39 21 58 40 8 42 39 6 2 - 66 0 0 39 49 40 7 44 37 39 236 -31 40 5 1 39 34 20 40 21 0 39 18 26 - 65 0 0 40 1 42 7 44 32 38 237 -31 40 17 2 39 46 24 40 33 0 39 30 31 - 64 0 0 40 13 26 7 44 27 38 238 -30 40 28 45 39 58 10 40 44 42 39 42 18 - 63 0 0 40 24 52 7 44 21 37 239 -29 40 40 9 40 9 37 40 56 5 39 53 47 - 62 0 0 40 36 0 7 44 17 36 240 -28 40 51 16 40 20 46 41 7 10 40 4 57 - 61 0 0 40 46 50 7 44 12 36 241 -27 41 2 4 40 31 37 41 17 57 40 15 49 - 60 0 0 40 57 21 7 44 7 35 241 -27 41 12 34 40 42 9 41 28 25 40 26 23 - 59 0 0 41 7 33 7 44 2 34 242 -26 41 22 45 40 52 23 41 38 35 40 36 38 - 58 0 0 41 17 28 7 43 58 33 243 -25 41 32 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54 42 49 4 43 34 28 42 33 35 - 43 0 0 43 9 17 7 43 2 23 254 -14 43 24 12 42 54 23 43 39 45 42 38 55 - 42 0 0 43 14 17 7 42 59 22 255 -13 43 29 12 42 59 24 43 44 44 42 43 57 - 41 0 0 43 18 59 7 42 56 21 255 -13 43 33 53 43 4 7 43 49 24 42 48 41 - 40 0 0 43 23 23 7 42 53 20 256 -12 43 38 16 43 8 31 43 53 47 42 53 6 - 39 0 0 43 27 28 7 42 51 20 257 -11 43 42 21 43 12 37 43 57 51 42 57 12 - 38 0 0 43 31 15 7 42 48 19 258 -10 43 46 7 43 16 25 44 1 37 43 1 1 - 37 0 0 43 34 44 7 42 45 18 258 -10 43 49 36 43 19 54 44 5 4 43 4 30 - 36 0 0 43 37 54 7 42 43 17 259 -9 43 52 45 43 23 5 44 8 13 43 7 42 - 35 0 0 43 40 46 7 42 41 17 260 -8 43 55 37 43 25 58 44 11 4 43 10 35 - 34 0 0 43 43 20 7 42 39 16 260 -8 43 58 10 43 28 32 44 13 37 43 13 9 - 33 0 0 43 45 35 7 42 37 15 261 -7 44 0 25 43 30 47 44 15 52 43 15 25 - 32 0 0 43 47 32 7 42 35 15 262 -6 44 2 22 43 32 45 44 17 48 43 17 23 - 31 0 0 43 49 11 7 42 33 14 263 -5 44 4 0 43 34 24 44 19 26 43 19 2 - 30 0 0 43 50 31 7 42 31 13 263 -5 44 5 20 43 35 44 44 20 46 43 20 23 - 29 0 0 43 51 33 7 42 29 12 264 -4 44 6 21 43 36 46 44 21 47 43 21 25 - 28 0 0 43 52 16 7 42 27 12 265 -3 44 7 5 43 37 30 44 22 30 43 22 9 - 27 0 0 43 52 41 7 42 26 11 265 -3 44 7 30 43 37 55 44 22 55 43 22 34 - 26 0 0 43 52 48 7 42 24 10 266 -2 44 7 36 43 38 1 44 23 1 43 22 41 - 25 0 0 43 52 36 7 42 23 10 267 -1 44 7 24 43 37 50 44 22 49 43 22 29 - 24 0 0 43 52 6 7 42 22 9 267 0 44 6 54 43 37 19 44 22 19 43 21 59 - 23 0 0 43 51 17 7 42 21 8 268 0 44 6 5 43 36 30 44 21 30 43 21 10 - 22 0 0 43 50 9 7 42 20 7 269 1 44 4 57 43 35 23 44 20 23 43 20 2 - 21 0 0 43 48 43 7 42 19 7 269 2 44 3 32 43 33 57 44 18 57 43 18 36 - 20 0 0 43 46 59 7 42 18 6 270 2 44 1 47 43 32 12 44 17 13 43 16 51 - 19 0 0 43 44 55 7 42 17 5 271 3 43 59 44 43 30 8 44 15 10 43 14 47 - 18 0 0 43 42 34 7 42 16 5 272 4 43 57 23 43 27 46 44 12 49 43 12 25 - 17 0 0 43 39 53 7 42 16 4 272 5 43 54 42 43 25 5 44 10 9 43 9 43 - 16 0 0 43 36 54 7 42 15 3 273 5 43 51 43 43 22 5 44 7 10 43 6 43 - 15 0 0 43 33 35 7 42 15 2 274 6 43 48 25 43 18 47 44 3 53 43 3 24 - 14 0 0 43 29 58 7 42 15 2 274 7 43 44 49 43 15 9 44 0 17 42 59 46 - 13 0 0 43 26 3 7 42 14 1 275 7 43 40 54 43 11 13 43 56 22 42 55 49 - 12 0 0 43 21 48 7 42 14 0 276 8 43 36 39 43 6 58 43 52 8 42 51 33 Data for the target star ------------------------ * name: TYC 0032-00866-1 * constellation : Pisces * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 01 41 19.7409 DE: +04 14 03.677 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .019, .020 ) * V mag [mag]: 10.3 * B mag [mag]: 10.6 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (261) Prymno approx. diameter [km]: 51 approx. diameter ["]: .047 distance from Earth [AU]: 1.50400 * orbital information: orbit source: Preston date of fit: 2007 Sep 25 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 639 number of rejected observations: 135 time covered by the observations: 1909 Jan 22 - 2007 Aug 28 1 sigma uncertainty ellipse (major, minor, PA): 0.023, 0.015, 68° remarks: * orbital elements for (261) Prymno : Mean anomaly = 225.35913144 deg Arg. of pericenter = 65.09763473 deg Long. of node = 96.75608205 deg Inclination = 3.63610076 deg Eccentricity = 0.09020566 Semimajor axis = 2.33135486 AU Perihelion dist = 2.12105345 AU Mag: H = 9.28, G = 0.19 Epoch of elements : MJD 54380.32700000 TDT (2007 Oct 07.327) ------ occelmnt file for Occult BEGIN ----------------------------------- 2007 Oct 07 261 Prymno 7h 51.2m UT 10.3 1 41 19.741 4 14 3.68TYC 0032-00866-1 10.6 12.7 51 4.6 1.504 -2.265 -13.76 -108.047 4.239 59.21 -5.40 7.8529 -.13572 .33435 -5.79158 -2.35286 -0.00127 0.00011 2000 225.268591200710 7.00000 65.097635 96.756082 3.6361010.090205662.331354862.121053459.445 0.19 RATE 2.7687990 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.030 0.024 77.0 1.520 0.024 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2007 Sep 25, 22:54 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org