IOTA/IOTA-ES occultation update for (354) Eleonora / TYC 5754-00763-1 event on 2007 Jul 02, 08:40 UT Visible from Venezuela, Colombia Summary ------- On 2007 Jul 02 UT, the 155 km diameter asteroid (354) Eleonora will occult a 11.6 mag star in the constellation Capricornus for observers along a path across Venezuela, Colombia. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.5 mag to 11.0 mag (the magnitude of the asteroid) for at most 13.9 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: 2007 Jul 02, 08:31 - 2007 Jul 02, 08:50 UT * magnitude of target star: 11.6 * magnitude drop [mag]: 0.5 * estimated maximum duration [s]: 13.9 * Moon: 96 % sunlit, 14° distance * Sun: 150° distance * rough path description: Venezuela, Colombia The occultation path -------------------- * approximate projected width [km]: 155 * 1 sigma uncertainty interval [path widths]: +/- 0.27 * 1 sigma uncertainty interval [seconds]: +/- 3.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .024 +/- .027) * 1 sigma uncertainty ellipse (major, minor, PA): ( .027", .024", 1° ) * approx speed of asteroid's shadow [km/s]: 11.1527 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5754-00763-1 by 354 Eleonora on 2007 Jul 02 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 161 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. -28 31 32 162 0 0 -27 34 59 8 50 4 1 99 -30 -26 52 26 -28 17 31 -26 29 26 -28 40 29 163 0 0 -27 43 33 8 50 4 2 99 -31 -27 1 3 -28 26 1 -26 38 5 -28 48 57 164 0 0 -27 51 37 8 50 3 3 98 -32 -27 9 11 -28 34 3 -26 46 15 -28 56 57 165 0 0 -27 59 14 8 50 3 3 98 -33 -27 16 50 -28 41 36 -26 53 56 -29 4 28 166 0 0 -28 6 22 8 50 2 4 98 -34 -27 24 1 -28 48 41 -27 1 9 -29 11 31 167 0 0 -28 13 1 8 50 1 5 97 -35 -27 30 43 -28 55 17 -27 7 53 -29 18 7 168 0 0 -28 19 12 8 50 1 6 97 -36 -27 36 57 -29 1 26 -27 14 8 -29 24 14 169 0 0 -28 24 55 8 50 0 7 96 -37 -27 42 43 -29 7 6 -27 19 55 -29 29 53 170 0 0 -28 30 10 8 49 58 8 96 -37 -27 48 0 -29 12 19 -27 25 13 -29 35 5 171 0 0 -28 34 57 8 49 57 9 95 -38 -27 52 49 -29 17 4 -27 30 3 -29 39 48 172 0 0 -28 39 16 8 49 56 10 95 -39 -27 57 10 -29 21 21 -27 34 25 -29 44 5 173 0 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19 24 17 6 26 10 25 23 53 1 - 36 0 0 25 20 58 8 31 34 19 250 10 26 5 29 24 36 29 26 29 32 24 12 27 - 35 0 0 25 39 47 8 31 31 18 250 11 26 24 12 24 55 24 26 48 11 24 31 26 - 34 0 0 25 58 9 8 31 28 18 251 12 26 42 27 25 13 52 27 6 23 24 49 58 - 33 0 0 26 16 4 8 31 25 17 251 13 27 0 16 25 31 53 27 24 8 25 8 2 - 32 0 0 26 33 30 8 31 22 16 252 14 27 17 36 25 49 26 27 41 26 25 25 38 - 31 0 0 26 50 29 8 31 20 15 252 15 27 34 29 26 6 31 27 58 16 25 42 46 - 30 0 0 27 7 1 8 31 18 14 253 16 27 50 55 26 23 8 28 14 38 25 59 27 - 29 0 0 27 23 5 8 31 16 13 253 17 28 6 53 26 39 18 28 30 33 26 15 39 - 28 0 0 27 38 41 8 31 14 12 254 18 28 22 23 26 55 0 28 46 0 26 31 24 - 27 0 0 27 53 49 8 31 12 11 254 19 28 37 26 27 10 14 29 1 0 26 46 41 - 26 0 0 28 8 30 8 31 10 10 254 20 28 52 1 27 25 0 29 15 32 27 1 30 - 25 0 0 28 22 43 8 31 9 9 255 21 29 6 9 27 39 18 29 29 36 27 15 52 - 24 0 0 28 36 28 8 31 7 8 255 21 29 19 49 27 53 8 29 43 13 27 29 45 - 23 0 0 28 49 45 8 31 6 7 256 22 29 33 1 28 6 31 29 56 23 27 43 10 - 22 0 0 29 2 35 8 31 5 7 256 23 29 45 45 28 19 25 30 9 5 27 56 7 - 21 0 0 29 14 57 8 31 4 6 257 24 29 58 2 28 31 52 30 21 19 28 8 37 - 20 0 0 29 26 51 8 31 3 5 257 25 30 9 52 28 43 51 30 33 6 28 20 38 - 19 0 0 29 38 18 8 31 3 4 258 26 30 21 14 28 55 22 30 44 25 28 32 12 - 18 0 0 29 49 17 8 31 2 3 258 27 30 32 8 29 6 26 30 55 17 28 43 18 - 17 0 0 29 59 48 8 31 2 2 259 28 30 42 35 29 17 1 31 5 42 28 53 55 - 16 0 0 30 9 51 8 31 1 1 259 29 30 52 35 29 27 9 31 15 39 29 4 5 - 15 0 0 30 19 27 8 31 1 0 260 29 31 2 7 29 36 49 31 25 9 29 13 48 Data for the target star ------------------------ * name: TYC 5754-00763-1 * constellation : Capricornus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 20 32 30.8428 DE: -08 40 09.687 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .020, .025 ) * V mag [mag]: 11.6 * B mag [mag]: 12.0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (354) Eleonora approx. diameter [km]: 155 approx. diameter ["]: .100 distance from Earth [AU]: 2.14300 * orbital information: orbit source: Preston date of fit: 2007 Jun 28 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1360 number of rejected observations: 192 time covered by the observations: 1913 Jun 10 - 2007 Jun 27 1 sigma uncertainty ellipse (major, minor, PA): 0.013, 0.011, 94° remarks: * orbital elements for (354) Eleonora : Mean anomaly = 143.93654908 deg Arg. of pericenter = 6.93544926 deg Long. of node = 140.41045771 deg Inclination = 18.38975048 deg Eccentricity = 0.11386419 Semimajor axis = 2.79871018 AU Perihelion dist = 2.48003731 AU Mag: H = 6.34, G = 0.37 Epoch of elements : MJD 54283.36200000 TDT (2007 Jul 02.362) ------ occelmnt file for Occult BEGIN ----------------------------------- 2007 Jul 02 354 Eleonora 8h 40.5m UT 11.6 20 32 30.843- 8 40 9.69TYC 5754-00763-1 12.0 11.0 155 13.9 2.143 -1.522 -12.58 257.982 -8.666 50.86 23.05 8.6756 -.01203 .02280 -5.49904 -3.06375 -0.00236 -0.00147 2000 143.2288232007 629.00000 6.935449140.410458 18.3897500.113864192.798710182.480037316.445 0.37 RATE 2.1050730 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.027 0.024 0.6 1.270 0.027 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2007 Jun 29, 01:57 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org