IOTA/IOTA-ES occultation update for (1649) Fabre / TYC 0719-01041-1 event on 2008 Jan 09, 04:32 UT Visible from Argentina, Chile Summary ------- On 2008 Jan 09 UT, the 28 km diameter asteroid (1649) Fabre will occult a 10.4 mag star in the constellation Orion for observers along a path across Argentina, Chile. In the case of an occultation, the combined light of the asteroid and the star will drop by 6.2 mag to 16.6 mag (the magnitude of the asteroid) for at most 2.4 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: 25 * date and approx. time of event: 2008 Jan 09, 04:25 - 2008 Jan 09, 04:39 UT * magnitude of target star: 10.4 * magnitude drop [mag]: 6.2 * estimated maximum duration [s]: 2.4 * Moon: 1 % sunlit, 147° distance * Sun: 155° distance * rough path description: Argentina, Chile The occultation path -------------------- * approximate projected width [km]: 35 * 1 sigma uncertainty interval [path widths]: +/- 2.70 * 1 sigma uncertainty interval [seconds]: +/- 7.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .060 +/- .050) * 1 sigma uncertainty ellipse (major, minor, PA): ( .060", .050", 85° ) * approx speed of asteroid's shadow [km/s]: 11.6416 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0719-01041-1 by 1649 Fabre on 2008 Jan 09 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 -177 0 0 -17 24 16 4 39 53 1 78 23 -17 14 39 -17 33 53 .. .. .. -18 26 13 -176 0 0 -17 13 10 4 39 53 2 78 22 -17 3 35 -17 22 47 .. .. .. -18 15 2 -175 0 0 -17 2 30 4 39 53 3 78 21 -16 52 55 -17 12 6 .. .. .. -18 4 16 -174 0 0 -16 52 16 4 39 52 4 77 20 -16 42 42 -17 1 51 .. .. .. -17 53 56 -173 0 0 -16 42 27 4 39 51 5 77 19 -16 32 54 -16 52 1 .. .. .. -17 44 2 -172 0 0 -16 33 5 4 39 50 6 77 19 -16 23 33 -16 42 38 .. .. .. -17 34 35 -171 0 0 -16 24 8 4 39 49 7 77 18 -16 14 37 -16 33 41 -15 23 31 -17 25 33 -170 0 0 -16 15 38 4 39 48 8 76 17 -16 6 7 -16 25 10 -15 15 5 -17 16 58 -169 0 0 -16 7 34 4 39 46 9 76 16 -15 58 4 -16 17 5 -15 7 5 -17 8 50 -168 0 0 -15 59 56 4 39 44 9 76 15 -15 50 27 -16 9 26 -14 59 32 -17 1 7 -167 0 0 -15 52 44 4 39 42 10 75 14 -15 43 16 -16 2 14 -14 52 24 -16 53 52 -166 0 0 -15 45 59 4 39 40 11 75 13 -15 36 31 -15 55 28 -14 45 43 -16 47 3 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0 0 -48 13 53 4 25 26 13 304 -14 -48 3 37 -48 24 11 -47 8 35 -49 20 12 - 31 0 0 -48 31 14 4 25 25 13 303 -13 -48 20 59 -48 41 31 -47 26 2 -49 37 26 - 30 0 0 -48 48 19 4 25 23 12 302 -13 -48 38 5 -48 58 35 -47 43 13 -49 54 24 - 29 0 0 -49 5 8 4 25 21 11 301 -12 -48 54 55 -49 15 22 -48 0 8 -50 11 6 - 28 0 0 -49 21 40 4 25 20 10 300 -12 -49 11 28 -49 31 53 -48 16 47 -50 27 31 - 27 0 0 -49 37 56 4 25 18 10 300 -11 -49 27 45 -49 48 8 -48 33 10 -50 43 40 - 26 0 0 -49 53 55 4 25 17 9 299 -10 -49 43 45 -50 4 6 -48 49 16 -50 59 31 - 25 0 0 -50 9 37 4 25 16 8 298 -10 -49 59 28 -50 19 47 -49 5 5 -51 15 6 - 24 0 0 -50 25 2 4 25 14 8 297 -9 -50 14 55 -50 35 11 -49 20 38 -51 30 24 - 23 0 0 -50 40 11 4 25 13 7 297 -9 -50 30 5 -50 50 19 -49 35 54 -51 45 25 - 22 0 0 -50 55 3 4 25 12 6 296 -8 -50 44 57 -51 5 9 -49 50 53 -52 0 9 - 21 0 0 -51 9 37 4 25 12 6 295 -7 -50 59 33 -51 19 42 -50 5 35 -52 14 36 - 20 0 0 -51 23 55 4 25 11 5 294 -7 -51 13 52 -51 33 59 .. .. .. -52 28 45 - 19 0 0 -51 37 55 4 25 10 4 293 -6 -51 27 53 -51 47 58 .. .. .. -52 42 38 - 18 0 0 -51 51 38 4 25 10 4 293 -6 -51 41 38 -52 1 40 .. .. .. -52 56 13 - 17 0 0 -52 5 4 4 25 9 3 292 -5 -51 55 5 -52 15 5 .. .. .. -53 9 32 - 16 0 0 -52 18 13 4 25 9 2 291 -4 -52 8 15 -52 28 13 .. .. .. -53 22 33 - 15 0 0 -52 31 5 4 25 9 2 290 -4 -52 21 8 -52 41 3 .. .. .. -53 35 16 - 14 0 0 -52 43 39 4 25 9 1 290 -3 -52 33 44 -52 53 36 .. .. .. -53 47 43 - 13 0 0 -52 55 57 4 25 8 0 289 -3 -52 46 2 -53 5 52 .. .. .. -53 59 52 Data for the target star ------------------------ * name: TYC 0719-01041-1 * constellation : Orion * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 05 46 42.4467 DE: +10 53 36.445 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .019, .019 ) * V mag [mag]: 10.4 * B mag [mag]: 10.6 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1649) Fabre approx. diameter [km]: 28 approx. diameter ["]: .019 distance from Earth [AU]: 2.02400 * orbital information: orbit source: Preston date of fit: 2008 Jan 02 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 658 number of rejected observations: 11 time covered by the observations: 1930 Feb 24 - 2007 Dec 17 1 sigma uncertainty ellipse (major, minor, PA): 0.057, 0.046, 85° remarks: * orbital elements for (1649) Fabre : Mean anomaly = 301.35681691 deg Arg. of pericenter = 11.28509060 deg Long. of node = 145.75351953 deg Inclination = 10.81333864 deg Eccentricity = 0.05071174 Semimajor axis = 3.02036560 AU Perihelion dist = 2.86719760 AU Mag: H = 11.98, G = 0.15 Epoch of elements : MJD 54474.18900000 TDT (2008 Jan 09.189) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Jan 09 1649 Fabre 4h 32.5m UT 10.4 5 46 42.447 10 53 36.45TYC 0719-01041-1 10.6 16.6 28 2.4 2.024 -1.840 8.93 -89.551 10.890 113.57 -22.19 4.5418 -.18410 -.55806 -6.24138 2.05447 0.00219 0.00127 2000 300.5702692008 1 5.00000 11.285091145.753520 10.8133390.050711743.020365602.8671976012.25 0.15 RATE 1.8776500 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.060 0.050 85.5 3.700 0.052 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Jan 02, 23:35 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org