IOTA/IOTA-ES occultation update for (69) Hesperia / TYC 5737-01422-1 event on 2012 Nov 02, 23:03 UT Visible from Caribbean Summary ------- On 2012 Nov 02 UT, the 133 km diameter asteroid (69) Hesperia will occult a 11.7 mag star in the constellation Sagittarius for observers along a path across Caribbean. In the case of an occultation, the combined light of the asteroid and the star will drop by 1.8 mag to 13.3 mag (the magnitude of the asteroid) for at most 6.2 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: 74 * date and approx. time of event: 2012 Nov 02, 23:03 - 2012 Nov 02, 23:06 UT * geocentric midpoint of event [JD]: 2456234.46036667 * magnitude of target star: 11.7 * magnitude drop [mag]: 1.8 * estimated maximum duration [s]: 6.2 * Moon: 86 % sunlit, 147° distance * Sun: 77° distance * rough path description: Caribbean The occultation path -------------------- * approximate projected width [km]: 164 * 1 sigma uncertainty interval [path widths]: +/- 0.77 * 1 sigma uncertainty interval [seconds]: +/- 6.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .055 +/- .040) * 1 sigma uncertainty ellipse (major, minor, PA): ( .055", .040", 90° ) * approx speed of asteroid's shadow [km/s]: 21.4257 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5737-01422-1 by 69 Hesperia on 2012 Nov 2 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 - 86 0 0 21 47 20 23 3 13 54 186 0 21 3 1 22 32 4 19 55 32 23 41 49 - 85 0 0 21 48 9 23 3 18 54 188 -1 21 3 50 22 32 54 19 56 21 23 42 39 - 84 0 0 21 49 17 23 3 22 54 190 -2 21 4 57 22 34 1 19 57 28 23 43 47 - 83 0 0 21 50 43 23 3 27 53 191 -3 21 6 23 22 35 27 19 58 53 23 45 13 - 82 0 0 21 52 27 23 3 32 53 193 -4 21 8 7 22 37 12 20 0 36 23 46 59 - 81 0 0 21 54 30 23 3 37 53 194 -5 21 10 9 22 39 15 20 2 37 23 49 3 - 80 0 0 21 56 51 23 3 42 53 196 -6 21 12 29 22 41 37 20 4 57 23 51 25 - 79 0 0 21 59 30 23 3 47 52 197 -7 21 15 8 22 44 17 20 7 35 23 54 6 - 78 0 0 22 2 27 23 3 52 52 199 -7 21 18 5 22 47 15 20 10 31 23 57 5 - 77 0 0 22 5 43 23 3 56 52 201 -8 21 21 20 22 50 31 20 13 44 24 0 23 - 76 0 0 22 9 17 23 4 1 51 202 -9 21 24 52 22 54 6 20 17 16 24 3 59 - 75 0 0 22 13 8 23 4 6 51 203 -10 21 28 43 22 57 58 20 21 5 24 7 53 - 74 0 0 22 17 18 23 4 10 50 205 -11 21 32 52 23 2 9 20 25 13 24 12 5 - 73 0 0 22 21 45 23 4 15 50 206 -12 21 37 18 23 6 37 20 29 38 24 16 35 - 72 0 0 22 26 30 23 4 20 49 208 -13 21 42 2 23 11 24 20 34 20 24 21 23 - 71 0 0 22 31 33 23 4 24 49 209 -14 21 47 4 23 16 27 20 39 20 24 26 29 - 70 0 0 22 36 53 23 4 29 48 210 -15 21 52 23 23 21 49 20 44 37 24 31 52 - 69 0 0 22 42 31 23 4 33 48 211 -16 21 57 59 23 27 28 20 50 11 24 37 33 - 68 0 0 22 48 26 23 4 38 47 213 -17 22 3 53 23 33 24 20 56 3 24 43 31 - 67 0 0 22 54 37 23 4 42 47 214 -18 22 10 3 23 39 37 21 2 11 24 49 47 - 66 0 0 23 1 6 23 4 47 46 215 -19 22 16 30 23 46 7 21 8 37 24 56 19 - 65 0 0 23 7 52 23 4 51 45 216 -20 22 23 15 23 52 54 21 15 19 25 3 9 - 64 0 0 23 14 54 23 4 55 45 217 -21 22 30 15 23 59 58 21 22 17 25 10 15 - 63 0 0 23 22 13 23 4 59 44 218 -22 22 37 33 24 7 19 21 29 32 25 17 38 - 62 0 0 23 29 48 23 5 4 43 219 -22 22 45 6 24 14 55 21 37 3 25 25 18 - 61 0 0 23 37 39 23 5 8 43 220 -23 22 52 56 24 22 48 21 44 50 25 33 13 - 60 0 0 23 45 46 23 5 12 42 221 -24 23 1 1 24 30 57 21 52 53 25 41 25 - 59 0 0 23 54 9 23 5 16 41 222 -25 23 9 22 24 39 22 22 1 11 25 49 53 - 58 0 0 24 2 48 23 5 20 41 223 -26 23 17 59 24 48 2 22 9 45 25 58 36 - 57 0 0 24 11 41 23 5 24 40 224 -27 23 26 51 24 56 58 22 18 35 26 7 35 - 56 0 0 24 20 50 23 5 28 39 225 -28 23 35 58 25 6 9 22 27 39 26 16 48 - 55 0 0 24 30 14 23 5 31 38 226 -29 23 45 20 25 15 35 22 36 58 26 26 17 - 54 0 0 24 39 53 23 5 35 37 226 -30 23 54 57 25 25 15 22 46 32 26 36 1 - 53 0 0 24 49 46 23 5 39 37 227 -31 24 4 48 25 35 10 22 56 20 26 46 0 - 52 0 0 24 59 53 23 5 42 36 228 -32 24 14 53 25 45 20 23 6 23 26 56 12 - 51 0 0 25 10 15 23 5 46 35 229 -33 24 25 12 25 55 43 23 16 39 27 6 39 - 50 0 0 25 20 50 23 5 49 34 230 -34 24 35 45 26 6 20 23 27 9 27 17 19 - 49 0 0 25 31 38 23 5 52 33 230 -35 24 46 32 26 17 11 23 37 53 27 28 13 - 48 0 0 25 42 40 23 5 56 33 231 -36 24 57 32 26 28 15 23 48 49 27 39 21 - 47 0 0 25 53 55 23 5 59 32 232 -36 25 8 44 26 39 32 23 59 59 27 50 41 - 46 0 0 26 5 22 23 6 2 31 232 -37 25 20 10 26 51 1 24 11 21 28 2 14 - 45 0 0 26 17 2 23 6 5 30 233 -38 25 31 47 27 2 43 24 22 56 28 13 59 - 44 0 0 26 28 54 23 6 8 29 234 -39 25 43 37 27 14 37 24 34 42 28 25 57 - 43 0 0 26 40 58 23 6 11 28 234 -40 25 55 39 27 26 43 24 46 41 28 38 6 - 42 0 0 26 53 13 23 6 14 28 235 -41 26 7 52 27 39 1 24 58 51 28 50 27 - 41 0 0 27 5 40 23 6 16 27 236 -42 26 20 17 27 51 30 25 11 13 29 3 0 - 40 0 0 27 18 17 23 6 19 26 236 -43 26 32 52 28 4 9 25 23 45 29 15 43 - 39 0 0 27 31 6 23 6 21 25 237 -44 26 45 38 28 17 0 25 36 28 29 28 36 - 38 0 0 27 44 4 23 6 24 24 238 -44 26 58 35 28 30 0 25 49 21 29 41 40 - 37 0 0 27 57 13 23 6 26 23 238 -45 27 11 41 28 43 11 26 2 25 29 54 54 - 36 0 0 28 10 31 23 6 28 22 239 -46 27 24 57 28 56 31 26 15 38 30 8 18 - 35 0 0 28 23 58 23 6 31 22 239 -47 27 38 23 29 10 1 26 29 0 30 21 51 - 34 0 0 28 37 35 23 6 33 21 240 -48 27 51 57 29 23 39 26 42 32 30 35 33 - 33 0 0 28 51 20 23 6 35 20 240 -49 28 5 41 29 37 27 26 56 12 30 49 23 - 32 0 0 29 5 14 23 6 37 19 241 -50 28 19 32 29 51 22 27 10 1 31 3 22 - 31 0 0 29 19 15 23 6 39 18 242 -50 28 33 32 30 5 26 27 23 58 31 17 29 - 30 0 0 29 33 24 23 6 40 17 242 -51 28 47 39 30 19 37 27 38 2 31 31 43 - 29 0 0 29 47 41 23 6 42 16 243 -52 29 1 54 30 33 55 27 52 14 31 46 5 - 28 0 0 30 2 4 23 6 44 15 243 -53 29 16 16 30 48 21 28 6 33 32 0 33 - 27 0 0 30 16 35 23 6 45 14 244 -54 29 30 44 31 2 53 28 20 59 32 15 8 - 26 0 0 30 31 11 23 6 46 14 244 -54 29 45 19 31 17 31 28 35 31 32 29 49 - 25 0 0 30 45 53 23 6 48 13 245 -55 29 59 59 31 32 15 28 50 9 32 44 36 - 24 0 0 31 0 41 23 6 49 12 245 -56 30 14 45 31 47 4 29 4 53 32 59 28 - 23 0 0 31 15 34 23 6 50 11 246 -56 30 29 37 32 1 59 29 19 42 33 14 25 - 22 0 0 31 30 32 23 6 51 10 247 -57 30 44 33 32 16 58 29 34 36 33 29 27 - 21 0 0 31 45 34 23 6 52 9 247 -58 30 59 34 32 32 2 29 49 35 33 44 34 - 20 0 0 32 0 41 23 6 53 8 248 -59 31 14 39 32 47 10 30 4 38 33 59 44 - 19 0 0 32 15 51 23 6 54 7 248 -59 31 29 48 33 2 22 30 19 45 34 14 58 - 18 0 0 32 31 5 23 6 54 6 249 -60 31 45 0 33 17 37 30 34 55 34 30 15 - 17 0 0 32 46 21 23 6 55 6 249 -60 32 0 16 33 32 55 30 50 8 34 45 35 - 16 0 0 33 1 40 23 6 55 5 250 -61 32 15 34 33 48 15 31 5 25 35 0 57 - 15 0 0 33 17 2 23 6 56 4 250 -62 32 30 54 34 3 38 .. .. .. 35 16 22 - 14 0 0 33 32 26 23 6 56 3 251 -62 32 46 17 34 19 3 .. .. .. 35 31 48 - 13 0 0 33 47 51 23 6 56 2 251 -63 33 1 41 34 34 29 .. .. .. 35 47 16 - 12 0 0 34 3 17 23 6 57 1 252 -63 33 17 6 34 49 56 .. .. .. 36 2 45 - 11 0 0 34 18 45 23 6 57 0 253 -64 33 32 33 35 5 24 .. .. .. .. .. .. Uncertainty in time = +/- 7 secs Prediction of 2012 Oct 26.0 Data for the target star ------------------------ * name: TYC 5737-01422-1 * constellation : Sagittarius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 19 53 55.6361 DE: -14 13 01.685 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .054, .040 ) * V mag [mag]: 11.7 * B mag [mag]: 12.7 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (69) Hesperia approx. diameter [km]: 133 approx. diameter ["]: .052 distance from Earth [AU]: 3.52600 * orbital information: orbit source: Preston date of fit: 2012 Oct 25 source of used astrometry: FASTT TMO MPC (via Astdys) number of used observations: 1348 number of rejected observations: 166 time covered by the observations: 1912 Jan 19 - 2012 Oct 19 1 sigma uncertainty ellipse (major, minor, PA): 0.008, 0.007, 85° remarks: * orbital elements for (69) Hesperia : Mean anomaly = 206.25196664 deg Arg. of pericenter = 289.73789806 deg Long. of node = 185.04491903 deg Inclination = 8.58426371 deg Eccentricity = 0.16976685 Semimajor axis = 2.97655447 AU Perihelion dist = 2.47123419 AU Mag: H = 7.11, G = 0.19 Epoch of elements : MJD 56233.96000000 TDT (2012 Nov 02.960) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Nov 2 69 Hesperia 23h 2.9m UT 11.7 19 53 55.636-14 13 1.69TYC 5737-01422-1 12.7 13.3 133 6.2 3.526 2.074 -0.20 -89.8683 -14.217 -169.84 -15.11 23.0488 0.00395 0.58511 12.09299 -0.08104 0.00567 0.00126 2000 205.49194120121030.00000289.737898185.044919 8.5842640.16976685 2.9765545 2.4712342 7.1 5.00.19 RATE 1.9192580 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.055 0.040 90 1.77 0.040 0 0 1 5 056226.0020121102_1422-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Oct 25, 21:44 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org