IOTA/IOTA-ES occultation update for (1347) Patria / TYC 5671-01271-1 event on 2008 Oct 16, 23:23 UT Visible from Caribbean Summary ------- On 2008 Oct 16 UT, the 32 km diameter asteroid (1347) Patria will occult a 8.9 mag star in the constellation Serpens 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 8.3 mag to 17.2 mag (the magnitude of the asteroid) for at most 1.0 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: 35 * date and approx. time of event: 2008 Oct 16, 23:24 - 2008 Oct 16, 23:25 UT * midpoint of event [JD]: 2454756.47447917 * magnitude of target star: 8.9 * magnitude drop [mag]: 8.3 * estimated maximum duration [s]: 1.0 * Moon: 93 % sunlit, 146° distance * Sun: 61° distance * rough path description: Caribbean The occultation path -------------------- * approximate projected width [km]: 40 * 1 sigma uncertainty interval [path widths]: +/- 1.93 * 1 sigma uncertainty interval [seconds]: +/- 2.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .032 +/- .027) * 1 sigma uncertainty ellipse (major, minor, PA): ( .032", .027", 87° ) * approx speed of asteroid's shadow [km/s]: 31.2977 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5671-01271-1 by 1347 Patria on 2008 Oct 16 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 - 88 0 0 22 53 43 23 24 25 45 215 -1 22 42 44 23 4 45 22 0 33 23 47 33 - 87 0 0 22 57 1 23 24 28 45 216 -2 22 46 1 23 8 2 22 3 49 23 50 51 - 86 0 0 23 0 38 23 24 31 44 217 -2 22 49 38 23 11 40 22 7 25 23 54 30 - 85 0 0 23 4 35 23 24 34 44 218 -3 22 53 34 23 15 37 22 11 21 23 58 28 - 84 0 0 23 8 51 23 24 37 43 219 -4 22 57 50 23 19 53 22 15 35 24 2 45 - 83 0 0 23 13 26 23 24 40 42 220 -5 23 2 25 23 24 29 22 20 9 24 7 22 - 82 0 0 23 18 21 23 24 42 42 221 -6 23 7 20 23 29 24 22 25 3 24 12 18 - 81 0 0 23 23 35 23 24 45 41 222 -7 23 12 33 23 34 38 22 30 15 24 17 34 - 80 0 0 23 29 7 23 24 48 40 223 -8 23 18 6 23 40 11 22 35 46 24 23 8 - 79 0 0 23 34 59 23 24 51 39 224 -9 23 23 57 23 46 3 22 41 36 24 29 2 - 78 0 0 23 41 10 23 24 53 39 225 -10 23 30 7 23 52 14 22 47 44 24 35 14 - 77 0 0 23 47 39 23 24 56 38 226 -11 23 36 36 23 58 43 22 54 12 24 41 45 - 76 0 0 23 54 26 23 24 58 37 227 -12 23 43 23 24 5 31 23 0 57 24 48 35 - 75 0 0 24 1 32 23 25 1 37 227 -13 23 50 28 24 12 38 23 8 1 24 55 43 - 74 0 0 24 8 56 23 25 3 36 228 -14 23 57 52 24 20 2 23 15 23 25 3 9 - 73 0 0 24 16 38 23 25 6 35 229 -15 24 5 33 24 27 44 23 23 2 25 10 53 - 72 0 0 24 24 38 23 25 8 34 230 -16 24 13 32 24 35 45 23 31 0 25 18 55 - 71 0 0 24 32 55 23 25 11 33 231 -16 24 21 49 24 44 3 23 39 15 25 27 15 - 70 0 0 24 41 30 23 25 13 33 231 -17 24 30 24 24 52 38 23 47 47 25 35 53 - 69 0 0 24 50 22 23 25 15 32 232 -18 24 39 15 25 1 31 23 56 37 25 44 47 - 68 0 0 24 59 31 23 25 17 31 233 -19 24 48 24 25 10 40 24 5 43 25 53 59 - 67 0 0 25 8 57 23 25 19 30 233 -20 24 57 49 25 20 7 24 15 7 26 3 28 - 66 0 0 25 18 40 23 25 21 29 234 -21 25 7 31 25 29 50 24 24 46 26 13 13 - 65 0 0 25 28 39 23 25 23 28 235 -22 25 17 30 25 39 49 24 34 43 26 23 15 - 64 0 0 25 38 54 23 25 25 28 235 -23 25 27 44 25 50 5 24 44 55 26 33 33 - 63 0 0 25 49 25 23 25 27 27 236 -24 25 38 14 26 0 37 24 55 23 26 44 7 - 62 0 0 26 0 11 23 25 29 26 237 -25 25 49 1 26 11 24 25 6 7 26 54 57 - 61 0 0 26 11 13 23 25 31 25 237 -26 26 0 2 26 22 27 25 17 6 27 6 2 - 60 0 0 26 22 31 23 25 33 24 238 -26 26 11 19 26 33 45 25 28 20 27 17 22 - 59 0 0 26 34 3 23 25 34 23 238 -27 26 22 50 26 45 17 25 39 49 27 28 57 - 58 0 0 26 45 50 23 25 36 22 239 -28 26 34 36 26 57 5 25 51 33 27 40 47 - 57 0 0 26 57 51 23 25 38 22 239 -29 26 46 37 27 9 6 26 3 31 27 52 52 - 56 0 0 27 10 6 23 25 39 21 240 -30 26 58 51 27 21 22 26 15 43 28 5 10 - 55 0 0 27 22 35 23 25 40 20 241 -31 27 11 19 27 33 52 26 28 8 28 17 42 - 54 0 0 27 35 17 23 25 42 19 241 -32 27 24 1 27 46 35 26 40 48 28 30 28 - 53 0 0 27 48 12 23 25 43 18 242 -33 27 36 56 27 59 31 26 53 40 28 43 26 - 52 0 0 28 1 20 23 25 44 17 242 -33 27 50 3 28 12 40 27 6 45 28 56 38 - 51 0 0 28 14 41 23 25 46 16 243 -34 28 3 23 28 26 1 27 20 3 29 10 2 - 50 0 0 28 28 14 23 25 47 15 243 -35 28 16 55 28 39 35 27 33 32 29 23 38 - 49 0 0 28 41 59 23 25 48 15 244 -36 28 30 40 28 53 20 27 47 14 29 37 26 - 48 0 0 28 55 55 23 25 49 14 244 -37 28 44 35 29 7 17 28 1 7 29 51 26 - 47 0 0 29 10 3 23 25 50 13 245 -38 28 58 42 29 21 25 28 15 11 30 5 36 - 46 0 0 29 24 21 23 25 51 12 245 -38 29 13 0 29 35 44 28 29 26 30 19 58 - 45 0 0 29 38 50 23 25 51 11 246 -39 29 27 28 29 50 13 28 43 52 30 34 30 - 44 0 0 29 53 28 23 25 52 10 246 -40 29 42 6 30 4 53 28 58 28 30 49 12 - 43 0 0 30 8 17 23 25 53 9 247 -41 29 56 54 30 19 42 29 13 13 31 4 4 - 42 0 0 30 23 15 23 25 53 8 247 -42 30 11 51 30 34 41 29 28 8 31 19 5 - 41 0 0 30 38 22 23 25 54 7 248 -42 30 26 57 30 49 48 29 43 12 31 34 15 - 40 0 0 30 53 37 23 25 54 6 249 -43 30 42 12 31 5 4 29 58 25 31 49 33 - 39 0 0 31 9 1 23 25 55 6 249 -44 30 57 36 31 20 29 30 13 46 32 5 0 - 38 0 0 31 24 33 23 25 55 5 250 -45 31 13 7 31 36 1 .. .. .. 32 20 35 - 37 0 0 31 40 12 23 25 56 4 250 -45 31 28 45 31 51 41 .. .. .. 32 36 17 - 36 0 0 31 55 58 23 25 56 3 251 -46 31 44 31 32 7 28 .. .. .. 32 52 6 - 35 0 0 32 11 52 23 25 56 2 251 -47 32 0 24 32 23 21 .. .. .. 33 8 2 - 34 0 0 32 27 51 23 25 56 1 252 -47 32 16 22 32 39 21 .. .. .. 33 24 4 - 33 0 0 32 43 56 23 25 56 0 252 -48 32 32 27 32 55 27 .. .. .. .. .. .. Uncertainty in time = +/- 2 secs [Prediction of 2008 Sep 11.0] Data for the target star ------------------------ * name: TYC 5671-01271-1 * constellation : Serpens * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 17 36 50.4205 DE: -14 47 07.788 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .022, .022 ) * V mag [mag]: 8.9 * B mag [mag]: 9.5 * Apparent position with proper motion RA(deg): 264.3355885903 DE(deg): -14.7915430181 * Equation of equinoxes (radians) : 0.000046964540558 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1347) Patria approx. diameter [km]: 32 approx. diameter ["]: .014 distance from Earth [AU]: 3.05500 * orbital information: orbit source: Preston date of fit: 2008 Sep 05 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 807 number of rejected observations: 29 time covered by the observations: 1931 Nov 10 - 2008 Jul 03 1 sigma uncertainty ellipse (major, minor, PA): 0.023, 0.016, 84° remarks: * orbital elements for (1347) Patria : Mean anomaly = 218.62831955 deg Arg. of pericenter = 200.34235661 deg Long. of node = 229.41968838 deg Inclination = 11.86433930 deg Eccentricity = 0.06777113 Semimajor axis = 2.57283660 AU Perihelion dist = 2.39847256 AU Mag: H = 11.25, G = 0.15 Epoch of elements : MJD 54755.97400000 TDT (2008 Oct 16.974) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Oct 16 1347 Patria 23h 23.2m UT 8.9 17 36 50.421-14 47 7.79TYC 5671-01271-1 9.5 17.2 32 1.0 3.055 3.498 -3.48 -112.4465 -14.784 -174.47 -9.30 23.3875 0.04080 0.61133 17.62374 -1.21097 0.00501 0.00021 2000 217.20156020081011.00000200.342357229.419688 11.8643390.06777113 2.5728366 2.398472611.6 5.00.15 RATE 2.3882830 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.032 0.027 87 2.93 0.027 0 54720.5020081016_1271-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Sep 11, 20:27 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org