IOTA/IOTA-ES occultation update for (13) Egeria / TYC 0026-00627-1 event on 2008 Jan 22, 02:08 UT Visible from Mexico, USA, Canada Summary ------- On 2008 Jan 22 UT, the 208 km diameter asteroid (13) Egeria will occult a 10.1 mag star in the constellation Pisces for observers along a path across Mexico, USA, Canada. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.0 mag to 11.9 mag (the magnitude of the asteroid) for at most 9.1 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: 99 * date and approx. time of event: 2008 Jan 22, 02:03 - 2008 Jan 22, 02:12 UT * midpoint of event [JD]: 2454487.5891 * magnitude of target star: 10.1 * magnitude drop [mag]: 2.0 * estimated maximum duration [s]: 9.1 * Moon: 100 % sunlit, 96° distance * Sun: 78° distance * rough path description: Mexico, USA, Canada The occultation path -------------------- * approximate projected width [km]: 211 * 1 sigma uncertainty interval [path widths]: +/- 0.19 * 1 sigma uncertainty interval [seconds]: +/- 1.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .022 +/- .021) * 1 sigma uncertainty ellipse (major, minor, PA): ( .022", .021", 85° ) * approx speed of asteroid's shadow [km/s]: 22.9306 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0026-00627-1 by 13 Egeria on 2008 Jan 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 ... .. .. -28 0 0 .. .. .. .. .. .. 140 56 58 ... .. .. 143 27 29 ... .. .. 141 14 38 -27 0 0 2 3 44 1 81 78 147 4 12 ... .. .. 148 53 48 ... .. .. 147 12 58 -26 0 0 2 3 46 7 79 82 151 41 14 141 30 23 153 11 54 ... .. .. Latitude Latitude Latitude Latitude 148 0 0 -25 50 33 2 3 46 7 78 83 -26 48 57 -24 51 58 -27 11 6 -24 29 40 149 0 0 -25 37 56 2 3 47 8 78 83 -26 36 29 -24 39 13 -26 58 41 -24 16 52 150 0 0 -25 24 44 2 3 47 9 78 84 -26 23 25 -24 25 52 -26 45 41 -24 3 26 151 0 0 -25 10 54 2 3 48 10 77 84 -26 9 45 -24 11 53 -26 32 4 -23 49 24 152 0 0 -24 56 28 2 3 49 11 77 85 -25 55 28 -23 57 16 -26 17 51 -23 34 44 153 0 0 -24 41 24 2 3 50 12 76 85 -25 40 34 -23 42 3 -26 3 1 -23 19 26 154 0 0 -24 25 43 2 3 51 13 76 85 -25 25 3 -23 26 11 -25 47 34 -23 3 31 155 0 0 -24 9 24 2 3 52 14 76 85 -25 8 55 -23 9 41 -25 31 30 -22 46 57 156 0 0 -23 52 27 2 3 53 15 75 84 -24 52 9 -22 52 33 -25 14 48 -22 29 44 157 0 0 -23 34 52 2 3 54 16 75 84 -24 34 46 -22 34 47 -24 57 29 -22 11 53 158 0 0 -23 16 38 2 3 56 17 74 83 -24 16 44 -22 16 21 -24 39 32 -21 53 23 159 0 0 -22 57 46 2 3 57 18 74 82 -23 58 4 -21 57 17 -24 20 56 -21 34 14 160 0 0 -22 38 15 2 3 59 19 74 82 -23 38 46 -21 37 33 -24 1 43 -21 14 26 161 0 0 -22 18 5 2 4 0 20 73 81 -23 18 49 -21 17 10 -23 41 50 -20 53 58 162 0 0 -21 57 16 2 4 2 21 73 80 -22 58 12 -20 56 8 -23 21 19 -20 32 51 163 0 0 -21 35 47 2 4 4 22 73 79 -22 36 57 -20 34 25 -23 0 9 -20 11 3 164 0 0 -21 13 39 2 4 6 23 72 78 -22 15 2 -20 12 3 -22 38 19 -19 48 35 165 0 0 -20 50 50 2 4 8 24 72 77 -21 52 28 -19 49 0 -22 15 50 -19 25 27 166 0 0 -20 27 21 2 4 10 25 72 77 -21 29 13 -19 25 17 -21 52 41 -19 1 38 167 0 0 -20 3 13 2 4 12 26 71 76 -21 5 19 -19 0 53 -21 28 52 -18 37 9 168 0 0 -19 38 23 2 4 14 27 71 75 -20 40 45 -18 35 49 -21 4 23 -18 11 59 169 0 0 -19 12 53 2 4 16 28 71 74 -20 15 30 -18 10 4 -20 39 15 -17 46 8 170 0 0 -18 46 43 2 4 19 29 70 73 -19 49 35 -17 43 38 -20 13 25 -17 19 36 171 0 0 -18 19 52 2 4 21 30 70 72 -19 22 59 -17 16 31 -19 46 56 -16 52 22 172 0 0 -17 52 19 2 4 24 31 70 71 -18 55 43 -16 48 42 -19 19 45 -16 24 28 173 0 0 -17 24 6 2 4 27 32 70 70 -18 27 46 -16 20 13 -18 51 54 -15 55 53 174 0 0 -16 55 12 2 4 30 33 69 69 -17 59 9 -15 51 3 -18 23 23 -15 26 36 175 0 0 -16 25 38 2 4 33 34 69 68 -17 29 50 -15 21 11 -17 54 11 -14 56 38 176 0 0 -15 55 22 2 4 36 35 69 67 -16 59 51 -14 50 39 -17 24 18 -14 25 59 177 0 0 -15 24 26 2 4 39 36 69 65 -16 29 11 -14 19 25 -16 53 45 -13 54 39 178 0 0 -14 52 49 2 4 42 37 69 64 -15 57 51 -13 47 31 -16 22 31 -13 22 39 179 0 0 -14 20 31 2 4 46 39 68 63 -15 25 51 -13 14 57 -15 50 37 -12 49 57 180 0 0 -13 47 33 2 4 49 40 68 62 -14 53 10 -12 41 42 -15 18 2 -12 16 36 -179 0 0 -13 13 55 2 4 53 41 68 61 -14 19 49 -12 7 47 -14 44 48 -11 42 34 -178 0 0 -12 39 38 2 4 56 42 68 60 -13 45 49 -11 33 12 -14 10 54 -11 7 53 -177 0 0 -12 4 41 2 5 0 43 68 59 -13 11 9 -10 57 57 -13 36 21 -10 32 32 -176 0 0 -11 29 5 2 5 4 44 68 58 -12 35 50 -10 22 4 -13 1 8 - 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99 0 0 38 30 53 2 11 31 45 236 -28 37 28 8 39 33 49 37 4 20 39 57 47 - 98 0 0 38 52 40 2 11 34 44 237 -29 37 50 11 39 55 21 37 26 28 40 19 13 - 97 0 0 39 13 51 2 11 37 43 238 -30 38 11 36 40 16 16 37 48 0 40 40 2 - 96 0 0 39 34 25 2 11 40 42 238 -31 38 32 26 40 36 35 38 8 55 41 0 16 - 95 0 0 39 54 23 2 11 43 41 239 -32 38 52 39 40 56 19 38 29 13 41 19 54 - 94 0 0 40 13 46 2 11 46 40 240 -32 39 12 16 41 15 27 38 48 56 41 38 57 - 93 0 0 40 32 34 2 11 48 39 241 -33 39 31 17 41 34 1 39 8 3 41 57 25 - 92 0 0 40 50 47 2 11 51 39 241 -34 39 49 44 41 52 0 39 26 35 42 15 18 - 91 0 0 41 8 25 2 11 53 38 242 -35 40 7 36 42 9 24 39 44 31 42 32 38 - 90 0 0 41 25 29 2 11 56 37 243 -35 40 24 53 42 26 15 40 1 54 42 49 23 - 89 0 0 41 41 59 2 11 58 36 244 -36 40 41 36 42 42 32 40 18 42 43 5 36 - 88 0 0 41 57 56 2 12 0 35 244 -37 40 57 45 42 58 17 40 34 56 43 21 15 - 87 0 0 42 13 20 2 12 3 35 245 -37 41 13 21 43 13 28 40 50 36 43 36 22 - 86 0 0 42 28 11 2 12 5 34 246 -38 41 28 24 43 28 7 41 5 43 43 50 57 - 85 0 0 42 42 29 2 12 7 33 247 -39 41 42 54 43 42 14 41 20 18 44 4 59 - 84 0 0 42 56 16 2 12 9 32 247 -40 41 56 52 43 55 50 41 34 20 44 18 30 - 83 0 0 43 9 31 2 12 11 32 248 -40 42 10 17 44 8 53 41 47 49 44 31 30 - 82 0 0 43 22 14 2 12 13 31 249 -41 42 23 11 44 21 26 42 0 47 44 43 59 - 81 0 0 43 34 26 2 12 15 30 250 -42 42 35 33 44 33 28 42 13 13 44 55 57 - 80 0 0 43 46 7 2 12 17 29 250 -42 42 47 24 44 45 0 42 25 7 45 7 25 - 79 0 0 43 57 18 2 12 18 29 251 -43 42 58 44 44 56 1 42 36 31 45 18 23 - 78 0 0 44 7 59 2 12 20 28 252 -44 43 9 33 45 6 33 42 47 23 45 28 51 - 77 0 0 44 18 9 2 12 22 27 252 -44 43 19 52 45 16 35 42 57 46 45 38 50 - 76 0 0 44 27 50 2 12 23 26 253 -45 43 29 41 45 26 8 43 7 38 45 48 19 - 75 0 0 44 37 1 2 12 25 26 254 -46 43 39 0 45 35 11 43 17 0 45 57 20 - 74 0 0 44 45 43 2 12 27 25 255 -46 43 47 50 45 43 46 43 25 52 46 5 52 - 73 0 0 44 53 57 2 12 28 24 255 -47 43 56 10 45 51 52 43 34 15 46 13 55 - 72 0 0 45 1 41 2 12 29 23 256 -47 44 4 1 45 59 30 43 42 8 46 21 31 - 71 0 0 45 8 57 2 12 31 23 257 -48 44 11 23 46 6 39 43 49 33 46 28 38 - 70 0 0 45 15 44 2 12 32 22 258 -49 44 18 16 46 13 21 43 56 28 46 35 17 - 69 0 0 45 22 4 2 12 33 21 258 -49 44 24 41 46 19 35 44 2 55 46 41 29 - 68 0 0 45 27 55 2 12 35 21 259 -50 44 30 37 46 25 21 44 8 53 46 47 13 - 67 0 0 45 33 18 2 12 36 20 260 -50 44 36 5 46 30 40 44 14 23 46 52 31 - 66 0 0 45 38 14 2 12 37 19 261 -51 44 41 5 46 35 32 44 19 25 46 57 21 - 65 0 0 45 42 43 2 12 38 18 261 -52 44 45 38 46 39 56 44 23 58 47 1 44 - 64 0 0 45 46 44 2 12 39 18 262 -52 44 49 42 46 43 54 44 28 4 47 5 40 - 63 0 0 45 50 17 2 12 40 17 263 -53 44 53 19 46 47 24 44 31 42 47 9 9 - 62 0 0 45 53 24 2 12 41 16 263 -53 44 56 28 46 50 28 44 34 52 47 12 12 - 61 0 0 45 56 3 2 12 42 16 264 -54 44 59 10 46 53 5 44 37 35 47 14 48 - 60 0 0 45 58 16 2 12 43 15 265 -54 45 1 24 46 55 16 44 39 50 47 16 58 - 59 0 0 46 0 1 2 12 44 14 266 -55 45 3 11 46 57 0 44 41 37 47 18 42 - 58 0 0 46 1 20 2 12 45 14 266 -55 45 4 31 46 58 18 44 42 57 47 19 59 - 57 0 0 46 2 12 2 12 46 13 267 -56 45 5 23 46 59 9 44 43 50 47 20 50 - 56 0 0 46 2 37 2 12 46 12 268 -56 45 5 49 46 59 34 44 44 16 47 21 15 - 55 0 0 46 2 35 2 12 47 11 269 -57 45 5 47 46 59 32 44 44 14 47 21 13 - 54 0 0 46 2 7 2 12 48 11 269 -57 45 5 18 46 59 5 44 43 45 47 20 46 - 53 0 0 46 1 12 2 12 48 10 270 -58 45 4 22 46 58 10 44 42 49 47 19 52 - 52 0 0 45 59 50 2 12 49 9 271 -58 45 2 59 46 56 50 44 41 25 47 18 32 - 51 0 0 45 58 2 2 12 49 9 271 -59 45 1 9 46 55 3 44 39 34 47 16 46 - 50 0 0 45 55 46 2 12 50 8 272 -59 44 58 52 46 52 50 44 37 16 47 14 33 - 49 0 0 45 53 4 2 12 50 7 273 -60 44 56 7 46 50 10 44 34 31 47 11 54 - 48 0 0 45 49 55 2 12 51 7 274 -60 44 52 55 46 47 4 44 31 18 47 8 49 - 47 0 0 45 46 19 2 12 51 6 274 -61 44 49 16 46 43 31 44 27 37 47 5 18 - 46 0 0 45 42 16 2 12 52 5 275 -61 44 45 9 46 39 32 44 23 29 47 1 20 - 45 0 0 45 37 46 2 12 52 4 276 -62 44 40 35 46 35 5 44 18 54 46 56 55 - 44 0 0 45 32 48 2 12 52 4 276 -62 44 35 33 46 30 12 44 13 50 46 52 3 - 43 0 0 45 27 24 2 12 52 3 277 -62 44 30 4 46 24 52 44 8 19 46 46 45 - 42 0 0 45 21 31 2 12 52 2 278 -63 44 24 6 46 19 5 44 2 19 46 41 0 - 41 0 0 45 15 11 2 12 53 2 279 -63 44 17 41 46 12 51 43 55 52 46 34 48 - 40 0 0 45 8 24 2 12 53 1 279 -63 44 10 48 46 6 9 43 48 56 46 28 9 - 39 0 0 45 1 8 2 12 53 0 280 -64 .. .. .. 45 59 0 .. .. .. 46 21 2 Data for the target star ------------------------ * name: TYC 0026-00627-1 * constellation : Pisces * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 01 11 58.3577 DE: +07 06 39.272 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .021, .021 ) * V mag [mag]: 10.1 * B mag [mag]: 10.8 * Apparent position with proper motion RA(deg): 18.0994190130 DE(deg): 7.1547822330 * Equation of equinoxes (radians) : 0.000045071830751 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (13) Egeria approx. diameter [km]: 208 approx. diameter ["]: .113 distance from Earth [AU]: 2.54300 * orbital information: orbit source: Preston date of fit: 2007 Dec 19 source of used astrometry: FASTT TMO MPC (via Astdys) number of used observations: 1087 number of rejected observations: 134 time covered by the observations: 1904 Nov 15 - 2007 Dec 15 1 sigma uncertainty ellipse (major, minor, PA): 0.008, 0.006, 47° remarks: * orbital elements for (13) Egeria : Mean anomaly = 287.06548154 deg Arg. of pericenter = 80.91120433 deg Long. of node = 43.29066402 deg Inclination = 16.54344478 deg Eccentricity = 0.08585992 Semimajor axis = 2.57600331 AU Perihelion dist = 2.35482787 AU Mag: H = 6.73, G = 0.15 Epoch of elements : MJD 54487.08900000 TDT (2008 Jan 22.089) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Jan 22 13 Egeria 2h 8.3m UT 10.1 1 11 58.358 7 6 39.27TYC 0026-00627-1 10.8 11.9 208 9.1 2.543 2.426 26.45 -134.899 7.104 150.76 -19.84 2.1384 -.09300 .12570 10.43933 7.65066 0.00527 0.00214 2000 285.3755492008 115.00000 80.911204 43.290664 16.5434450.085859922.576003312.354827876.745 0.15 RATE 2.3838800 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.022 0.021 84.7 1.190 0.021 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2007 Dec 22, 15:14 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org