IOTA/IOTA-ES occultation update for (694) Ekard / TYC 0530-01501-1 event on 2009 Nov 02, 22:41 UT Visible from Summary ------- On 2009 Nov 02 UT, the 99 km diameter asteroid (694) Ekard will occult a 11.2 mag star in the constellation Aquarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 1.6 mag to 12.5 mag (the magnitude of the asteroid) for at most 5.0 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: 99 * date and approx. time of event: 2009 Nov 02, 22:40 - 2009 Nov 02, 22:46 UT * magnitude of target star: 11.2 * magnitude drop [mag]: 1.6 * estimated maximum duration [s]: 5.0 * Moon: 100 % sunlit, 82° distance * Sun: 98° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 99 * 1 sigma uncertainty interval [path widths]: +/- 0.29 * 1 sigma uncertainty interval [seconds]: +/- 1.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .038 +/- .028) * 1 sigma uncertainty ellipse (major, minor, PA): ( .039", .027", 76° ) * approx speed of asteroid's shadow [km/s]: 19.7564 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0530-01501-1 by 694 Ekard on 2009 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 - 73 0 0 - 0 41 34 22 40 14 82 69 -1 - 1 8 45 - 0 14 24 - 1 24 31 0 1 21 - 72 0 0 - 0 49 59 22 40 20 83 65 -2 - 1 17 10 - 0 22 49 - 1 32 56 - 0 7 3 - 71 0 0 - 0 58 27 22 40 26 84 60 -3 - 1 25 38 - 0 31 17 - 1 41 25 - 0 15 32 - 70 0 0 - 1 6 59 22 40 32 85 52 -4 - 1 34 10 - 0 39 48 - 1 49 57 - 0 24 3 - 69 0 0 - 1 15 33 22 40 37 86 43 -5 - 1 42 45 - 0 48 23 - 1 58 32 - 0 32 37 - 68 0 0 - 1 24 11 22 40 43 86 30 -6 - 1 51 22 - 0 57 0 - 2 7 9 - 0 41 14 - 67 0 0 - 1 32 51 22 40 49 86 15 -7 - 2 0 2 - 1 5 39 - 2 15 49 - 0 49 54 - 66 0 0 - 1 41 33 22 40 55 86 359 -8 - 2 8 45 - 1 14 22 - 2 24 32 - 0 58 36 - 65 0 0 - 1 50 18 22 41 1 86 344 -9 - 2 17 30 - 1 23 6 - 2 33 17 - 1 7 21 - 64 0 0 - 1 59 5 22 41 6 86 332 -10 - 2 26 17 - 1 31 53 - 2 42 4 - 1 16 7 - 63 0 0 - 2 7 53 22 41 12 85 322 -10 - 2 35 6 - 1 40 42 - 2 50 53 - 1 24 56 - 62 0 0 - 2 16 44 22 41 18 84 315 -11 - 2 43 56 - 1 49 32 - 2 59 44 - 1 33 46 - 61 0 0 - 2 25 36 22 41 24 83 310 -12 - 2 52 49 - 1 58 24 - 3 8 36 - 1 42 38 - 60 0 0 - 2 34 29 22 41 30 82 306 -13 - 3 1 42 - 2 7 18 - 3 17 30 - 1 51 31 - 59 0 0 - 2 43 24 22 41 35 81 303 -14 - 3 10 37 - 2 16 12 - 3 26 24 - 2 0 26 - 58 0 0 - 2 52 20 22 41 41 80 300 -15 - 3 19 33 - 2 25 8 - 3 35 20 - 2 9 22 - 57 0 0 - 3 1 16 22 41 47 79 298 -16 - 3 28 29 - 2 34 4 - 3 44 17 - 2 18 18 - 56 0 0 - 3 10 14 22 41 53 78 296 -17 - 3 37 26 - 2 43 1 - 3 53 14 - 2 27 15 - 55 0 0 - 3 19 11 22 41 58 77 295 -18 - 3 46 24 - 2 51 59 - 4 2 12 - 2 36 13 - 54 0 0 - 3 28 9 22 42 4 77 294 -19 - 3 55 22 - 3 0 57 - 4 11 10 - 2 45 11 - 53 0 0 - 3 37 7 22 42 10 76 292 -20 - 4 4 20 - 3 9 55 - 4 20 8 - 2 54 9 - 52 0 0 - 3 46 5 22 42 15 75 291 -21 - 4 13 18 - 3 18 53 - 4 29 6 - 3 3 7 - 51 0 0 - 3 55 3 22 42 21 73 291 -22 - 4 22 16 - 3 27 51 - 4 38 3 - 3 12 5 - 50 0 0 - 4 4 0 22 42 27 72 290 -23 - 4 31 13 - 3 36 48 - 4 47 0 - 3 21 2 - 49 0 0 - 4 12 57 22 42 32 71 289 -24 - 4 40 10 - 3 45 45 - 4 55 57 - 3 29 59 - 48 0 0 - 4 21 53 22 42 38 70 288 -24 - 4 49 5 - 3 54 41 - 5 4 53 - 3 38 55 - 47 0 0 - 4 30 47 22 42 43 69 288 -25 - 4 58 0 - 4 3 36 - 5 13 47 - 3 47 49 - 46 0 0 - 4 39 41 22 42 48 68 287 -26 - 5 6 54 - 4 12 29 - 5 22 41 - 3 56 43 - 45 0 0 - 4 48 33 22 42 54 67 287 -27 - 5 15 46 - 4 21 22 - 5 31 33 - 4 5 36 - 44 0 0 - 4 57 24 22 42 59 66 286 -28 - 5 24 37 - 4 30 13 - 5 40 24 - 4 14 27 - 43 0 0 - 5 6 13 22 43 4 65 286 -29 - 5 33 26 - 4 39 2 - 5 49 13 - 4 23 16 - 42 0 0 - 5 15 0 22 43 10 64 286 -30 - 5 42 13 - 4 47 49 - 5 58 0 - 4 32 3 - 41 0 0 - 5 23 46 22 43 15 63 285 -31 - 5 50 58 - 4 56 34 - 6 6 44 - 4 40 49 - 40 0 0 - 5 32 28 22 43 20 62 285 -32 - 5 59 40 - 5 5 17 - 6 15 27 - 4 49 32 - 39 0 0 - 5 41 9 22 43 25 61 285 -33 - 6 8 21 - 5 13 58 - 6 24 7 - 4 58 13 - 38 0 0 - 5 49 47 22 43 30 60 284 -33 - 6 16 58 - 5 22 36 - 6 32 45 - 5 6 51 - 37 0 0 - 5 58 22 22 43 35 59 284 -34 - 6 25 33 - 5 31 11 - 6 41 20 - 5 15 26 - 36 0 0 - 6 6 54 22 43 40 58 284 -35 - 6 34 5 - 5 39 44 - 6 49 52 - 5 23 59 - 35 0 0 - 6 15 23 22 43 45 57 283 -36 - 6 42 34 - 5 48 13 - 6 58 21 - 5 32 28 - 34 0 0 - 6 23 49 22 43 50 56 283 -37 - 6 51 0 - 5 56 39 - 7 6 46 - 5 40 54 - 33 0 0 - 6 32 12 22 43 55 55 283 -38 - 6 59 22 - 6 5 2 - 7 15 8 - 5 49 17 - 32 0 0 - 6 40 31 22 43 59 54 283 -39 - 7 7 41 - 6 13 21 - 7 23 27 - 5 57 36 - 31 0 0 - 6 48 46 22 44 4 53 282 -40 - 7 15 56 - 6 21 37 - 7 31 42 - 6 5 52 - 30 0 0 - 6 56 57 22 44 9 52 282 -40 - 7 24 7 - 6 29 48 - 7 39 52 - 6 14 4 - 29 0 0 - 7 5 4 22 44 13 51 282 -41 - 7 32 14 - 6 37 56 - 7 47 59 - 6 22 11 - 28 0 0 - 7 13 7 22 44 18 50 282 -42 - 7 40 16 - 6 45 59 - 7 56 2 - 6 30 15 - 27 0 0 - 7 21 6 22 44 22 49 282 -43 - 7 48 15 - 6 53 58 - 8 4 0 - 6 38 14 - 26 0 0 - 7 29 0 22 44 26 48 281 -44 - 7 56 9 - 7 1 52 - 8 11 54 - 6 46 8 - 25 0 0 - 7 36 50 22 44 31 47 281 -45 - 8 3 58 - 7 9 42 - 8 19 43 - 6 53 58 - 24 0 0 - 7 44 34 22 44 35 46 281 -45 - 8 11 42 - 7 17 27 - 8 27 27 - 7 1 43 - 23 0 0 - 7 52 14 22 44 39 45 281 -46 - 8 19 22 - 7 25 7 - 8 35 6 - 7 9 23 - 22 0 0 - 7 59 49 22 44 43 44 281 -47 - 8 26 56 - 7 32 42 - 8 42 41 - 7 16 59 - 21 0 0 - 8 7 18 22 44 47 43 280 -48 - 8 34 25 - 7 40 12 - 8 50 10 - 7 24 29 - 20 0 0 - 8 14 42 22 44 51 42 280 -49 - 8 41 49 - 7 47 36 - 8 57 33 - 7 31 53 - 19 0 0 - 8 22 1 22 44 54 41 280 -49 - 8 49 7 - 7 54 55 - 9 4 51 - 7 39 12 - 18 0 0 - 8 29 14 22 44 58 40 280 -50 - 8 56 20 - 8 2 8 - 9 12 4 - 7 46 26 - 17 0 0 - 8 36 21 22 45 2 39 280 -51 - 9 3 27 - 8 9 16 - 9 19 11 - 7 53 33 - 16 0 0 - 8 43 22 22 45 5 38 279 -51 - 9 10 28 - 8 16 17 - 9 26 11 - 8 0 35 - 15 0 0 - 8 50 18 22 45 9 37 279 -52 - 9 17 23 - 8 23 13 - 9 33 6 - 8 7 31 - 14 0 0 - 8 57 7 22 45 12 36 279 -53 - 9 24 12 - 8 30 3 - 9 39 55 - 8 14 21 - 13 0 0 - 9 3 50 22 45 15 35 279 -54 - 9 30 55 - 8 36 46 - 9 46 38 - 8 21 4 - 12 0 0 - 9 10 27 22 45 19 34 279 -54 - 9 37 31 - 8 43 23 - 9 53 14 - 8 27 42 - 11 0 0 - 9 16 57 22 45 22 33 278 -55 - 9 44 1 - 8 49 53 - 9 59 43 - 8 34 12 - 10 0 0 - 9 23 20 22 45 25 32 278 -56 - 9 50 24 - 8 56 17 -10 6 6 - 8 40 36 - 9 0 0 - 9 29 37 22 45 28 31 278 -56 - 9 56 41 - 9 2 35 -10 12 23 - 8 46 54 - 8 0 0 - 9 35 48 22 45 31 30 278 -57 -10 2 51 - 9 8 45 -10 18 33 - 8 53 4 - 7 0 0 - 9 41 51 22 45 33 29 278 -57 -10 8 54 - 9 14 49 -10 24 35 - 8 59 8 - 6 0 0 - 9 47 47 22 45 36 28 277 -58 -10 14 50 - 9 20 45 -10 30 31 - 9 5 5 - 5 0 0 - 9 53 36 22 45 39 27 277 -59 -10 20 39 - 9 26 35 -10 36 20 - 9 10 55 - 4 0 0 - 9 59 18 22 45 41 26 277 -59 -10 26 20 - 9 32 17 -10 42 1 - 9 16 37 - 3 0 0 -10 4 53 22 45 44 25 277 -60 -10 31 55 - 9 37 52 -10 47 36 - 9 22 13 - 2 0 0 -10 10 21 22 45 46 24 277 -60 -10 37 22 - 9 43 20 -10 53 3 - 9 27 40 - 1 0 0 -10 15 41 22 45 48 23 277 -60 -10 42 42 - 9 48 40 -10 58 22 - 9 33 1 0 0 0 -10 20 53 22 45 50 22 276 -61 -10 47 54 - 9 53 53 -11 3 34 - 9 38 14 1 0 0 -10 25 58 22 45 52 21 276 -61 -10 52 58 - 9 58 58 -11 8 38 - 9 43 19 2 0 0 -10 30 55 22 45 54 20 276 -62 -10 57 55 -10 3 56 -11 13 35 - 9 48 17 3 0 0 -10 35 44 22 45 56 19 276 -62 -11 2 44 -10 8 45 -11 18 24 - 9 53 7 4 0 0 -10 40 26 22 45 58 18 276 -62 -11 7 25 -10 13 27 -11 23 5 - 9 57 49 5 0 0 -10 45 0 22 46 0 17 275 -63 -11 11 59 -10 18 1 -11 27 38 -10 2 23 6 0 0 -10 49 25 22 46 1 16 275 -63 -11 16 24 -10 22 27 -11 32 4 -10 6 49 7 0 0 -10 53 43 22 46 3 15 275 -63 -11 20 42 -10 26 45 -11 36 21 -10 11 7 8 0 0 -10 57 53 22 46 4 14 275 -63 -11 24 51 -10 30 55 -11 40 30 -10 15 17 9 0 0 -11 1 54 22 46 5 13 275 -63 -11 28 52 -10 34 57 -11 44 31 -10 19 19 10 0 0 -11 5 47 22 46 7 12 274 -64 -11 32 45 -10 38 50 -11 48 24 -10 23 12 11 0 0 -11 9 32 22 46 8 11 274 -64 -11 36 30 -10 42 35 -11 52 9 -10 26 58 12 0 0 -11 13 9 22 46 9 10 274 -64 -11 40 6 -10 46 12 -11 55 45 -10 30 35 13 0 0 -11 16 37 22 46 10 9 274 -64 -11 43 35 -10 49 41 -11 59 13 -10 34 3 14 0 0 -11 19 57 22 46 11 8 274 -64 -11 46 54 -10 53 1 -12 2 32 -10 37 24 15 0 0 -11 23 9 22 46 11 7 273 -64 -11 50 5 -10 56 13 -12 5 44 -10 40 35 16 0 0 -11 26 12 22 46 12 6 273 -64 -11 53 8 -10 59 16 -12 8 46 -10 43 39 17 0 0 -11 29 6 22 46 12 5 273 -63 -11 56 2 -11 2 10 -12 11 40 -10 46 33 18 0 0 -11 31 52 22 46 13 4 273 -63 -11 58 48 -11 4 56 -12 14 26 -10 49 20 19 0 0 -11 34 29 22 46 13 3 273 -63 -12 1 25 -11 7 34 -12 17 3 -10 51 57 20 0 0 -11 36 58 22 46 13 2 272 -63 -12 3 54 -11 10 3 -12 19 31 -10 54 26 21 0 0 -11 39 18 22 46 14 1 272 -63 -12 6 14 -11 12 23 -12 21 51 -10 56 46 22 0 0 -11 41 29 22 46 14 0 272 -62 -12 8 25 -11 14 34 -12 24 2 -10 58 58 Uncertainty in time = +/- 2 secs [Prediction of 2008 Mar 20.0] Data for the target star ------------------------ * name: TYC 0530-01501-1 * constellation : Aquarius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 21 05 27.0213 DE: +01 56 20.008 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .021, .022 ) * V mag [mag]: 11.2 * B mag [mag]: 12.2 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (694) Ekard approx. diameter [km]: 99 approx. diameter ["]: .099 distance from Earth [AU]: 1.37200 * orbital information: orbit source: Preston date of fit: 2008 Mar 20 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 807 number of rejected observations: 78 time covered by the observations: 1909 Nov 09 - 2008 Jan 15 1 sigma uncertainty ellipse (major, minor, PA): 0.033, 0.016, 70° remarks: * orbital elements for (694) Ekard : Mean anomaly = 5.32181138 deg Arg. of pericenter = 110.86856456 deg Long. of node = 230.39020038 deg Inclination = 15.84261857 deg Eccentricity = 0.32557792 Semimajor axis = 2.66903777 AU Perihelion dist = 1.80005801 AU Mag: H = 9.15, G = 0.15 Epoch of elements : MJD 55137.94500000 TDT (2009 Nov 02.945) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Nov 2 694 Ekard 22h 40.9m UT 11.2 21 5 27.021 1 56 20.01TYC 0530-01501-1 12.2 12.5 99 5.0 1.372 4.720 -9.95 -66.1852 1.942 -164.32 -15.02 22.6809 -0.00976 -0.06232 11.04217 -1.55445 0.00485 0.00128 2000 3.52597820091026.00000110.868565230.390200 15.8426190.32557792 2.6690378 1.8000580 9.2 5.00.15 RATE 2.2603310 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.039 0.027 76 1.29 0.029 0 54545.5020091102_1501-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 20, 16:04 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org