IOTA/IOTA-ES occultation update for (1017) Jacqueline / TYC 1414-00789-1 event on 2008 May 21, 20:34 UT Visible from Africa Summary ------- On 2008 May 21 UT, the 38 km diameter asteroid (1017) Jacqueline will occult a 11.2 mag star in the constellation Leo for observers along a path across Africa. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.6 mag to 15.8 mag (the magnitude of the asteroid) for at most 1.8 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: 58 * date and approx. time of event: 2008 May 21, 20:35 - 2008 May 21, 20:39 UT * midpoint of event [JD]: 2454608.35763333 * magnitude of target star: 11.2 * magnitude drop [mag]: 4.6 * estimated maximum duration [s]: 1.8 * Moon: 97 % sunlit, 117° distance * Sun: 82° distance * rough path description: Africa The occultation path -------------------- * approximate projected width [km]: 38 * 1 sigma uncertainty interval [path widths]: +/- 1.07 * 1 sigma uncertainty interval [seconds]: +/- 2.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .030 +/- .024) * 1 sigma uncertainty ellipse (major, minor, PA): ( .030", .024", 96° ) * approx speed of asteroid's shadow [km/s]: 21.2846 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1414-00789-1 by 1017 Jacqueline on 2008 May 21 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 - 35 0 0 10 59 3 20 35 43 80 328 -1 10 47 45 11 10 21 10 23 33 11 34 30 - 34 0 0 10 33 2 20 35 49 79 325 -2 10 21 42 10 44 21 9 57 27 11 8 34 - 33 0 0 10 6 36 20 35 55 78 322 -3 9 55 15 10 17 57 9 30 56 10 42 13 - 32 0 0 9 39 46 20 36 0 77 320 -4 9 28 23 9 51 8 9 4 1 10 15 28 - 31 0 0 9 12 32 20 36 6 76 319 -5 9 1 7 9 23 56 8 36 42 9 48 19 - 30 0 0 8 44 54 20 36 12 75 317 -6 8 33 28 8 56 19 8 8 59 9 20 46 - 29 0 0 8 16 53 20 36 17 74 316 -7 8 5 26 8 28 20 7 40 54 8 52 50 - 28 0 0 7 48 30 20 36 23 73 315 -8 7 37 1 7 59 59 7 12 26 8 24 32 - 27 0 0 7 19 45 20 36 29 72 314 -9 7 8 15 7 31 16 6 43 37 7 55 52 - 26 0 0 6 50 40 20 36 34 71 313 -11 6 39 8 7 2 11 6 14 26 7 26 50 - 25 0 0 6 21 13 20 36 40 70 312 -12 6 9 40 6 32 46 5 44 56 6 57 28 - 24 0 0 5 51 27 20 36 45 68 311 -13 5 39 53 6 3 2 5 15 6 6 27 47 - 23 0 0 5 21 22 20 36 51 67 311 -14 5 9 47 5 32 58 4 44 56 5 57 46 - 22 0 0 4 50 59 20 36 56 66 310 -15 4 39 22 5 2 36 4 14 29 5 27 26 - 21 0 0 4 20 18 20 37 2 65 310 -16 4 8 40 4 31 56 3 43 44 4 56 50 - 20 0 0 3 49 21 20 37 7 64 309 -17 3 37 41 4 1 0 3 12 43 4 25 56 - 19 0 0 3 18 7 20 37 13 63 309 -19 3 6 26 3 29 48 2 41 26 3 54 46 - 18 0 0 2 46 39 20 37 18 62 308 -20 2 34 57 2 58 20 2 9 54 3 23 20 - 17 0 0 2 14 56 20 37 23 61 308 -21 2 3 13 2 26 38 1 38 8 2 51 41 - 16 0 0 1 43 0 20 37 28 60 308 -22 1 31 16 1 54 43 1 6 9 2 19 48 - 15 0 0 1 10 51 20 37 34 58 307 -23 0 59 6 1 22 35 0 33 57 1 47 42 - 14 0 0 0 38 31 20 37 39 57 307 -24 0 26 45 0 50 16 0 1 34 1 15 25 - 13 0 0 0 6 0 20 37 44 56 307 -25 - 0 5 46 0 17 47 - 0 30 59 0 42 57 - 12 0 0 - 0 26 40 20 37 49 55 306 -27 - 0 38 27 - 0 14 53 - 1 3 41 0 10 19 - 11 0 0 - 0 59 29 20 37 54 54 306 -28 - 1 11 16 - 0 47 41 - 1 36 32 - 0 22 28 - 10 0 0 - 1 32 25 20 37 59 53 306 -29 - 1 44 13 - 1 20 37 - 2 9 30 - 0 55 22 - 9 0 0 - 2 5 28 20 38 3 52 306 -30 - 2 17 17 - 1 53 39 - 2 42 35 - 1 28 23 - 8 0 0 - 2 38 36 20 38 8 50 306 -31 - 2 50 26 - 2 26 47 - 3 15 45 - 2 1 31 - 7 0 0 - 3 11 50 20 38 13 49 305 -32 - 3 23 39 - 3 0 0 - 3 48 59 - 2 34 42 - 6 0 0 - 3 45 6 20 38 17 48 305 -33 - 3 56 56 - 3 33 16 - 4 22 17 - 3 7 58 - 5 0 0 - 4 18 25 20 38 22 47 305 -35 - 4 30 16 - 4 6 35 - 4 55 37 - 3 41 16 - 4 0 0 - 4 51 46 20 38 26 46 305 -36 - 5 3 37 - 4 39 56 - 5 28 58 - 4 14 36 - 3 0 0 - 5 25 7 20 38 31 45 304 -37 - 5 36 58 - 5 13 17 - 6 2 20 - 4 47 57 - 2 0 0 - 5 58 28 20 38 35 44 304 -38 - 6 10 18 - 5 46 37 - 6 35 40 - 5 21 17 - 1 0 0 - 6 31 47 20 38 39 42 304 -39 - 6 43 37 - 6 19 56 - 7 8 59 - 5 54 36 0 0 0 - 7 5 3 20 38 43 41 304 -40 - 7 16 53 - 6 53 12 - 7 42 15 - 6 27 53 1 0 0 - 7 38 15 20 38 47 40 304 -41 - 7 50 6 - 7 26 25 - 8 15 27 - 7 1 6 2 0 0 - 8 11 23 20 38 51 39 303 -43 - 8 23 14 - 7 59 33 - 8 48 34 - 7 34 15 3 0 0 - 8 44 25 20 38 55 38 303 -44 - 8 56 15 - 8 32 36 - 9 21 36 - 8 7 18 4 0 0 - 9 17 21 20 38 58 37 303 -45 - 9 29 11 - 9 5 32 - 9 54 30 - 8 40 14 5 0 0 - 9 50 9 20 39 2 36 303 -46 -10 1 58 - 9 38 20 -10 27 17 - 9 13 4 6 0 0 -10 22 48 20 39 5 34 302 -47 -10 34 37 -10 11 0 -10 59 55 - 9 45 45 7 0 0 -10 55 18 20 39 8 33 302 -48 -11 7 7 -10 43 31 -11 32 23 -10 18 17 8 0 0 -11 27 38 20 39 12 32 302 -49 -11 39 25 -11 15 51 -12 4 40 -10 50 38 9 0 0 -11 59 46 20 39 15 31 302 -50 -12 11 33 -11 48 0 -12 36 46 -11 22 48 10 0 0 -12 31 42 20 39 18 30 301 -52 -12 43 28 -12 19 56 -13 8 40 -11 54 47 11 0 0 -13 3 25 20 39 21 29 301 -53 -13 15 10 -12 51 40 -13 40 21 -12 26 32 12 0 0 -13 34 54 20 39 23 28 301 -54 -13 46 39 -13 23 10 -14 11 47 -12 58 4 13 0 0 -14 6 9 20 39 26 27 301 -55 -14 17 52 -13 54 26 -14 42 59 -13 29 22 14 0 0 -14 37 8 20 39 29 25 300 -56 -14 48 50 -14 25 26 -15 13 55 -14 0 24 15 0 0 -15 7 51 20 39 31 24 300 -57 -15 19 32 -14 56 10 -15 44 34 -14 31 10 16 0 0 -15 38 17 20 39 33 23 300 -58 -15 49 57 -15 26 37 -16 14 57 -15 1 39 17 0 0 -16 8 25 20 39 36 22 300 -59 -16 20 5 -15 56 46 -16 45 2 -15 31 51 18 0 0 -16 38 16 20 39 38 21 299 -60 -16 49 54 -16 26 38 -17 14 48 -16 1 45 19 0 0 -17 7 47 20 39 40 20 299 -61 -17 19 24 -16 56 10 -17 44 16 -16 31 20 20 0 0 -17 36 59 20 39 42 19 299 -62 -17 48 35 -17 25 24 -18 13 24 -17 0 36 21 0 0 -18 5 51 20 39 43 18 298 -63 -18 17 25 -17 54 17 -18 42 12 -17 29 32 22 0 0 -18 34 22 20 39 45 17 298 -64 -18 45 55 -18 22 49 -19 10 39 -17 58 8 23 0 0 -19 2 32 20 39 47 16 298 -65 -19 14 4 -18 51 1 -19 38 45 -18 26 22 24 0 0 -19 30 20 20 39 48 15 297 -66 -19 41 51 -19 18 50 -20 6 29 -18 54 15 25 0 0 -19 57 47 20 39 49 14 297 -67 -20 9 16 -19 46 18 -20 33 50 -19 21 45 26 0 0 -20 24 51 20 39 51 13 297 -68 -20 36 18 -20 13 23 -21 0 50 -19 48 54 27 0 0 -20 51 32 20 39 52 12 296 -69 -21 2 57 -20 40 6 -21 27 26 -20 15 39 28 0 0 -21 17 49 20 39 53 11 296 -70 -21 29 13 -21 6 25 -21 53 39 -20 42 1 29 0 0 -21 43 43 20 39 54 9 296 -71 -21 55 6 -21 32 20 -22 19 28 -21 8 0 30 0 0 -22 9 13 20 39 55 8 295 -72 -22 20 34 -21 57 52 -22 44 53 -21 33 35 31 0 0 -22 34 18 20 39 55 7 295 -73 -22 45 38 -22 22 59 -23 9 54 -21 58 45 32 0 0 -22 58 59 20 39 56 6 294 -74 -23 10 17 -22 47 41 -23 34 30 -22 23 31 33 0 0 -23 23 15 20 39 56 5 294 -75 -23 34 32 -23 11 59 -23 58 41 -22 47 52 34 0 0 -23 47 6 20 39 57 4 294 -75 -23 58 21 -23 35 51 -24 22 27 -23 11 48 35 0 0 -24 10 32 20 39 57 3 293 -76 -24 21 45 -23 59 18 -24 45 48 -23 35 18 36 0 0 -24 33 32 20 39 58 2 293 -77 -24 44 44 -24 22 20 -25 8 43 -23 58 23 37 0 0 -24 56 6 20 39 58 1 292 -78 -25 7 17 -24 44 56 -25 31 12 -24 21 3 38 0 0 -25 18 15 20 39 58 0 292 -78 -25 29 24 -25 7 6 -25 53 16 -24 43 16 Uncertainty in time = +/- 2 secs [Prediction of 2008 Apr 9.0] Data for the target star ------------------------ * name: TYC 1414-00789-1 * constellation : Leo * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 09 51 39.6449 DE: +19 35 00.837 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .019, .020 ) * V mag [mag]: 11.2 * B mag [mag]: 12.4 * Apparent position with proper motion RA(deg): 148.0340742425 DE(deg): 19.5449417771 * Equation of equinoxes (radians) : 0.000040507410235 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1017) Jacqueline approx. diameter [km]: 38 approx. diameter ["]: .023 distance from Earth [AU]: 2.32800 * orbital information: orbit source: Preston date of fit: 2008 Apr 08 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 868 number of rejected observations: 49 time covered by the observations: 1928 Jan 29 - 2008 Apr 08 1 sigma uncertainty ellipse (major, minor, PA): 0.023, 0.013, 101° remarks: * orbital elements for (1017) Jacqueline : Mean anomaly = 345.29085264 deg Arg. of pericenter = 66.42416750 deg Long. of node = 119.15005796 deg Inclination = 7.93879732 deg Eccentricity = 0.07674468 Semimajor axis = 2.60557818 AU Perihelion dist = 2.40561391 AU Mag: H = 10.97, G = 0.15 Epoch of elements : MJD 54607.85800000 TDT (2008 May 21.858) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 May 21 1017 Jacqueline 20h 35.0m UT 11.2 9 51 39.645 19 35 0.84TYC 1414-00789-1 12.4 15.8 38 1.8 2.328 2.997 -16.33 -40.6854 19.588 -129.58 20.39 20.5832 -0.03830 -0.09572 11.20887 -4.32293 0.00508 -0.00175 2000 343.4494032008 514.00000 66.424168119.150058 7.9387970.07674468 2.6055782 2.405613910.9 5.00.15 RATE 2.3434080 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.030 0.024 96 2.07 0.024 0 54565.5020080521_0789-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Apr 13, 03:52 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org