IOTA/IOTA-ES occultation update for (147) Protogeneia / TYC 0016-00497-1 event on 2010 Feb 12, 16:42 UT Visible from Russia, Europe Summary ------- On 2010 Feb 12 UT, the 133 km diameter asteroid (147) Protogeneia will occult a 12.1 mag star in the constellation Pisces 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 2.3 mag to 14.3 mag (the magnitude of the asteroid) for at most 3.6 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: 92 * date and approx. time of event: 2010 Feb 12, 16:44 - 2010 Feb 12, 16:45 UT * magnitude of target star: 12.1 * magnitude drop [mag]: 2.3 * estimated maximum duration [s]: 3.6 * Moon: 2 % sunlit, 63° distance * Sun: 47° distance * rough path description: Russia, Europe The occultation path -------------------- * approximate projected width [km]: 161 * 1 sigma uncertainty interval [path widths]: +/- 0.50 * 1 sigma uncertainty interval [seconds]: +/- 2.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .030 +/- .024) * 1 sigma uncertainty ellipse (major, minor, PA): ( .030", .024", 85° ) * approx speed of asteroid's shadow [km/s]: 36.9982 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0016-00497-1 by 147 Protogeneia on 2010 Feb 12 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 5 0 0 52 3 13 16 44 33 38 217 0 51 16 57 52 49 57 50 31 7 53 37 9 6 0 0 52 16 45 16 44 34 37 219 -1 51 30 35 53 3 22 50 44 51 53 50 28 7 0 0 52 29 58 16 44 36 37 220 -2 51 43 54 53 16 29 50 58 16 54 3 28 8 0 0 52 42 51 16 44 37 36 221 -2 51 56 54 53 29 16 51 11 21 54 16 9 9 0 0 52 55 26 16 44 38 36 222 -3 52 9 34 53 41 45 51 24 8 54 28 32 10 0 0 53 7 42 16 44 40 35 223 -4 52 21 56 53 53 54 51 36 35 54 40 35 11 0 0 53 19 39 16 44 41 34 224 -4 52 33 59 54 5 45 51 48 44 54 52 20 12 0 0 53 31 17 16 44 42 34 225 -5 52 45 43 54 17 17 52 0 33 55 3 46 13 0 0 53 42 36 16 44 44 33 226 -5 52 57 8 54 28 31 52 12 4 55 14 53 14 0 0 53 53 37 16 44 45 33 227 -6 53 8 14 54 39 26 52 23 16 55 25 42 15 0 0 54 4 20 16 44 46 32 228 -7 53 19 2 54 50 3 52 34 9 55 36 13 16 0 0 54 14 44 16 44 47 32 229 -7 53 29 32 55 0 21 52 44 44 55 46 26 17 0 0 54 24 49 16 44 48 31 230 -8 53 39 43 55 10 21 52 55 1 55 56 20 18 0 0 54 34 37 16 44 49 31 231 -8 53 49 36 55 20 4 53 4 58 56 5 57 19 0 0 54 44 6 16 44 51 30 232 -9 53 59 10 55 29 28 53 14 38 56 15 15 20 0 0 54 53 18 16 44 52 29 233 -10 54 8 27 55 38 34 53 23 59 56 24 16 21 0 0 55 2 11 16 44 53 29 233 -10 54 17 25 55 47 22 53 33 3 56 32 59 22 0 0 55 10 47 16 44 54 28 234 -11 54 26 5 55 55 53 53 41 48 56 41 25 23 0 0 55 19 5 16 44 55 28 235 -11 54 34 28 56 4 6 53 50 15 56 49 33 24 0 0 55 27 5 16 44 56 27 236 -12 54 42 33 56 12 2 53 58 24 56 57 24 25 0 0 55 34 48 16 44 57 27 237 -13 54 50 20 56 19 40 54 6 16 57 4 57 26 0 0 55 42 13 16 44 58 26 238 -13 54 57 50 56 27 1 54 13 50 57 12 14 27 0 0 55 49 21 16 44 59 26 239 -14 55 5 2 56 34 5 54 21 6 57 19 13 28 0 0 55 56 12 16 45 0 25 240 -14 55 11 57 56 40 51 54 28 5 57 25 56 29 0 0 56 2 46 16 45 0 25 241 -15 55 18 34 56 47 21 54 34 46 57 32 21 30 0 0 56 9 2 16 45 1 24 242 -15 55 24 55 56 53 33 54 41 10 57 38 30 31 0 0 56 15 2 16 45 2 23 243 -16 55 30 58 56 59 29 54 47 17 57 44 22 32 0 0 56 20 44 16 45 3 23 244 -17 55 36 44 57 5 8 54 53 6 57 49 57 33 0 0 56 26 10 16 45 4 22 245 -17 55 42 13 57 10 31 54 58 39 57 55 16 34 0 0 56 31 19 16 45 5 22 245 -18 55 47 25 57 15 37 55 3 54 58 0 19 35 0 0 56 36 12 16 45 5 21 246 -18 55 52 21 57 20 26 55 8 52 58 5 5 36 0 0 56 40 48 16 45 6 21 247 -19 55 57 0 57 24 59 55 13 34 58 9 35 37 0 0 56 45 7 16 45 7 20 248 -19 56 1 22 57 29 16 55 17 58 58 13 49 38 0 0 56 49 10 16 45 7 20 249 -20 56 5 27 57 33 16 55 22 6 58 17 46 39 0 0 56 52 56 16 45 8 19 250 -20 56 9 16 57 37 0 55 25 57 58 21 28 40 0 0 56 56 26 16 45 9 19 251 -21 56 12 48 57 40 28 55 29 32 58 24 54 41 0 0 56 59 40 16 45 9 18 252 -21 56 16 4 57 43 40 55 32 50 58 28 3 42 0 0 57 2 38 16 45 10 18 253 -22 56 19 3 57 46 36 55 35 51 58 30 57 43 0 0 57 5 19 16 45 11 17 253 -23 56 21 46 57 49 15 55 38 36 58 33 35 44 0 0 57 7 45 16 45 11 16 254 -23 56 24 13 57 51 39 55 41 4 58 35 57 45 0 0 57 9 54 16 45 12 16 255 -24 56 26 24 57 53 47 55 43 16 58 38 4 46 0 0 57 11 47 16 45 12 15 256 -24 56 28 18 57 55 39 55 45 11 58 39 55 47 0 0 57 13 24 16 45 13 15 257 -25 56 29 56 57 57 15 55 46 50 58 41 30 48 0 0 57 14 45 16 45 13 14 258 -25 56 31 18 57 58 35 55 48 13 58 42 49 49 0 0 57 15 50 16 45 14 14 259 -26 56 32 24 57 59 40 55 49 19 58 43 53 50 0 0 57 16 40 16 45 14 13 259 -26 56 33 14 58 0 28 55 50 9 58 44 41 51 0 0 57 17 13 16 45 15 13 260 -27 56 33 47 58 1 1 55 50 43 58 45 14 52 0 0 57 17 30 16 45 15 12 261 -27 56 34 4 58 1 19 55 51 1 58 45 31 53 0 0 57 17 32 16 45 15 12 262 -28 56 34 6 58 1 20 55 51 2 58 45 32 54 0 0 57 17 17 16 45 16 11 263 -28 56 33 51 58 1 6 55 50 47 58 45 18 55 0 0 57 16 47 16 45 16 11 264 -29 56 33 20 58 0 36 55 50 16 58 44 49 56 0 0 57 16 0 16 45 17 10 265 -29 56 32 33 57 59 50 55 49 28 58 44 3 57 0 0 57 14 58 16 45 17 9 265 -30 56 31 30 57 58 48 55 48 24 58 43 3 58 0 0 57 13 40 16 45 17 9 266 -30 56 30 11 57 57 31 55 47 4 58 41 46 59 0 0 57 12 5 16 45 18 8 267 -31 56 28 36 57 55 58 55 45 28 58 40 15 60 0 0 57 10 15 16 45 18 8 268 -31 56 26 44 57 54 9 55 43 35 58 38 27 61 0 0 57 8 9 16 45 18 7 269 -32 56 24 37 57 52 4 55 41 26 58 36 24 62 0 0 57 5 47 16 45 18 7 270 -32 56 22 13 57 49 44 55 39 1 58 34 5 63 0 0 57 3 9 16 45 19 6 271 -33 56 19 33 57 47 7 55 36 19 58 31 30 64 0 0 57 0 14 16 45 19 6 271 -33 56 16 36 57 44 15 55 33 21 58 28 40 65 0 0 56 57 4 16 45 19 5 272 -34 56 13 24 57 41 7 55 30 6 58 25 34 66 0 0 56 53 37 16 45 19 5 273 -34 56 9 55 57 37 42 55 26 35 58 22 12 67 0 0 56 49 54 16 45 19 4 274 -35 56 6 9 57 34 2 55 22 47 58 18 34 68 0 0 56 45 55 16 45 19 3 275 -35 56 2 8 57 30 6 55 18 43 58 14 40 69 0 0 56 41 39 16 45 20 3 276 -36 55 57 49 57 25 53 55 14 22 58 10 31 70 0 0 56 37 8 16 45 20 2 276 -36 55 53 15 57 21 24 55 9 44 58 6 5 71 0 0 56 32 19 16 45 20 2 277 -37 55 48 23 57 16 39 55 4 50 58 1 23 72 0 0 56 27 14 16 45 20 1 278 -37 55 43 15 57 11 37 54 59 38 57 56 25 73 0 0 56 21 53 16 45 20 1 279 -38 55 37 50 57 6 19 54 54 10 57 51 10 74 0 0 56 16 15 16 45 20 0 280 -38 .. .. .. 57 0 45 .. .. .. 57 45 40 Uncertainty in time = +/- 2 secs Prediction of 2009 Dec 27.0 Data for the target star ------------------------ * name: TYC 0016-00497-1 * constellation : Pisces * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 00 39 15.5111 DE: +05 26 25.506 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .026, .023 ) * V mag [mag]: 12.1 * B mag [mag]: 12.6 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (147) Protogeneia approx. diameter [km]: 133 approx. diameter ["]: .050 distance from Earth [AU]: 3.63500 * orbital information: orbit source: Preston date of fit: 2009 Dec 27 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 964 number of rejected observations: 118 time covered by the observations: 1903 Aug 05 - 2009 Nov 23 1 sigma uncertainty ellipse (major, minor, PA): 0.014, 0.008, 68° remarks: * orbital elements for (147) Protogeneia : Mean anomaly = 32.56883718 deg Arg. of pericenter = 101.99950601 deg Long. of node = 248.42217934 deg Inclination = 1.92992437 deg Eccentricity = 0.03013310 Semimajor axis = 3.13470972 AU Perihelion dist = 3.04025121 AU Mag: H = 8.58, G = 0.15 Epoch of elements : MJD 55239.69700000 TDT (2010 Feb 12.697) ------ occelmnt file for Occult BEGIN ----------------------------------- 2010 Feb 12 147 Protogeneia 16h 43.0m UT 12.1 0 39 15.511 5 26 25.51TYC 0016-00497-1 12.6 14.3 133 3.6 3.635 3.139 18.82 -23.5565 5.436 -67.19 -13.57 16.7163 -0.20868 0.52656 19.37893 7.78135 0.00404 0.00181 2000 30.8467882010 2 3.00000101.999506248.422179 1.9299240.03013310 3.1347097 3.0402512 8.3 5.00.15 RATE 1.7758570 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.030 0.024 85 1.50 0.025 0 055192.0020100212_0497-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2009 Dec 27, 14:23 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org