IOTA/IOTA-ES occultation update for (3132) Landgraf / TYC 0663-01230-1 event on 2007 Nov 01, 19:12 UT Visible from Japan, China, India, Africa Summary ------- On 2007 Nov 01 UT, the 39 km diameter asteroid (3132) Landgraf will occult a 9.2 mag star in the constellation Taurus for observers along a path across Japan, China, India, Africa. In the case of an occultation, the combined light of the asteroid and the star will drop by 6.5 mag to 15.7 mag (the magnitude of the asteroid) for at most 3.7 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: 39 * date and approx. time of event: 2007 Nov 01, 19:02 - 2007 Nov 01, 19:22 UT * magnitude of target star: 9.2 * magnitude drop [mag]: 6.5 * estimated maximum duration [s]: 3.7 * Moon: 50 % sunlit, 73° distance * Sun: 162° distance * rough path description: Japan, China, India, Africa The occultation path -------------------- * approximate projected width [km]: 40 * 1 sigma uncertainty interval [path widths]: +/- 1.68 * 1 sigma uncertainty interval [seconds]: +/- 12.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .093 +/- .053) * 1 sigma uncertainty ellipse (major, minor, PA): ( .096", .049", 75° ) * approx speed of asteroid's shadow [km/s]: 10.4276 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0663-01230-1 by 3132 Landgraf on 2007 Nov 01 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 - 6 0 0 .. .. .. .. .. .. .. .. .. - 1 38 0 .. .. .. - 1 0 45 .. .. .. - 5 0 0 - 1 34 39 19 22 34 1 77 -19 - 1 23 34 - 1 45 44 - 0 46 16 .. .. .. - 4 0 0 - 1 19 58 19 22 33 2 77 -20 - 1 8 53 - 1 31 3 - 0 31 33 .. .. .. - 3 0 0 - 1 5 3 19 22 33 3 77 -21 - 0 53 57 - 1 16 9 - 0 16 35 - 1 53 23 - 2 0 0 - 0 49 53 19 22 32 4 77 -22 - 0 38 46 - 1 1 0 - 0 1 23 - 1 38 16 - 1 0 0 - 0 34 29 19 22 31 5 77 -23 - 0 23 22 - 0 45 36 0 14 4 - 1 22 54 0 0 0 - 0 18 51 19 22 30 6 77 -24 - 0 7 43 - 0 29 59 0 29 44 - 1 7 19 1 0 0 - 0 3 0 19 22 29 7 77 -25 0 8 8 - 0 14 8 0 45 38 - 0 51 30 2 0 0 0 13 4 19 22 27 8 77 -26 0 24 14 0 1 56 1 1 45 - 0 35 28 3 0 0 0 29 22 19 22 26 9 77 -27 0 40 31 0 18 12 1 18 5 - 0 19 14 4 0 0 0 45 52 19 22 24 10 77 -28 0 57 2 0 34 42 1 34 38 - 0 2 46 5 0 0 1 2 34 19 22 22 11 77 -29 1 13 45 0 51 23 1 51 22 0 13 53 6 0 0 1 19 28 19 22 19 12 77 -30 1 30 39 1 8 17 2 8 19 0 30 45 7 0 0 1 36 33 19 22 17 13 77 -31 1 47 45 1 25 22 2 25 26 0 47 48 8 0 0 1 53 50 19 22 14 14 77 -32 2 5 2 1 42 38 2 42 45 1 5 2 9 0 0 2 11 17 19 22 11 15 77 -33 2 22 30 2 0 5 3 0 15 1 22 27 10 0 0 2 28 55 19 22 8 16 77 -34 2 40 9 2 17 42 3 17 55 1 40 3 11 0 0 2 46 43 19 22 5 17 77 -35 2 57 57 2 35 29 3 35 45 1 57 49 12 0 0 3 4 41 19 22 1 18 77 -36 3 15 55 2 53 26 3 53 45 2 15 44 13 0 0 3 22 48 19 21 58 19 77 -37 3 34 3 3 11 33 4 11 54 2 33 49 14 0 0 3 41 3 19 21 54 21 77 -38 3 52 19 3 29 48 4 30 12 2 52 3 15 0 0 3 59 28 19 21 50 22 77 -39 4 10 44 3 48 12 4 48 39 3 10 25 16 0 0 4 18 0 19 21 46 23 77 -40 4 29 17 4 6 44 5 7 13 3 28 56 17 0 0 4 36 41 19 21 41 24 77 -41 4 47 58 4 25 24 5 25 55 3 47 34 18 0 0 4 55 29 19 21 37 25 78 -42 5 6 46 4 44 12 5 44 45 4 6 20 19 0 0 5 14 23 19 21 32 26 78 -43 5 25 41 5 3 6 6 3 41 4 25 13 20 0 0 5 33 24 19 21 27 27 78 -44 5 44 43 5 22 7 6 22 44 4 44 13 21 0 0 5 52 32 19 21 22 28 78 -45 6 3 50 5 41 14 6 41 53 5 3 19 22 0 0 6 11 45 19 21 17 29 78 -46 6 23 4 6 0 27 7 1 8 5 22 30 23 0 0 6 31 3 19 21 11 30 78 -47 6 42 23 6 19 45 7 20 28 5 41 48 24 0 0 6 50 27 19 21 6 31 79 -48 7 1 46 6 39 8 7 39 53 6 1 10 25 0 0 7 9 55 19 21 0 32 79 -49 7 21 15 6 58 36 7 59 22 6 20 36 26 0 0 7 29 27 19 20 54 33 79 -50 7 40 47 7 18 7 8 18 55 6 40 7 27 0 0 7 49 3 19 20 48 34 79 -51 8 0 23 7 37 43 8 38 32 6 59 42 28 0 0 8 8 42 19 20 42 35 79 -53 8 20 2 7 57 21 8 58 12 7 19 20 29 0 0 8 28 23 19 20 35 36 80 -54 8 39 44 8 17 3 9 17 55 7 39 1 30 0 0 8 48 8 19 20 29 37 80 -55 8 59 29 8 36 47 9 37 40 7 58 44 31 0 0 9 7 54 19 20 22 38 80 -56 9 19 15 8 56 33 9 57 27 8 18 29 32 0 0 9 27 42 19 20 15 39 80 -57 9 39 3 9 16 21 10 17 15 8 38 17 33 0 0 9 47 31 19 20 8 40 81 -58 9 58 52 9 36 10 10 37 5 8 58 5 34 0 0 10 7 21 19 20 1 41 81 -59 10 18 42 9 56 0 10 56 55 9 17 55 35 0 0 10 27 11 19 19 54 42 81 -60 10 38 32 10 15 50 11 16 46 9 37 44 36 0 0 10 47 1 19 19 47 43 82 -61 10 58 23 10 35 40 11 36 37 9 57 34 37 0 0 11 6 51 19 19 39 44 82 -62 11 18 13 10 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24 -179 0 0 24 53 19 19 2 36 3 283 12 25 4 24 24 42 14 25 41 41 24 5 5 -178 0 0 24 39 46 19 2 35 2 284 13 24 50 52 24 28 41 25 28 11 23 51 29 -177 0 0 24 25 58 19 2 35 2 284 14 24 37 4 24 14 52 25 14 26 .. .. .. -176 0 0 24 11 54 19 2 35 1 284 15 24 23 1 24 0 48 25 0 25 .. .. .. Data for the target star ------------------------ * name: TYC 0663-01230-1 * constellation : Taurus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 03 39 18.0300 DE: +13 17 47.303 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .019, .019 ) * V mag [mag]: 9.2 * B mag [mag]: 10.4 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3132) Landgraf approx. diameter [km]: 39 approx. diameter ["]: .029 distance from Earth [AU]: 1.85500 * orbital information: orbit source: Preston date of fit: 2007 Oct 23 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 766 number of rejected observations: 14 time covered by the observations: 1929 Nov 27 - 2007 Aug 15 1 sigma uncertainty ellipse (major, minor, PA): 0.094, 0.045, 74° remarks: * orbital elements for (3132) Landgraf : Mean anomaly = 24.34457527 deg Arg. of pericenter = 265.77156702 deg Long. of node = 113.08736383 deg Inclination = 4.45576955 deg Eccentricity = 0.12003895 Semimajor axis = 3.15107208 AU Perihelion dist = 2.77282068 AU Mag: H = 11.51, G = 0.15 Epoch of elements : MJD 54405.80000000 TDT (2007 Nov 01.800) ------ occelmnt file for Occult BEGIN ----------------------------------- 2007 Nov 01 3132 Landgraf 19h 12.6m UT 9.2 3 39 18.030 13 17 47.30TYC 0663-01230-1 10.4 15.7 39 3.7 1.855 -1.862 -6.39 -274.010 13.298 -112.24 -14.49 19.2094 -.04482 .19208 -5.72949 -1.34658 -0.00181 0.00017 2000 23.322589920071027.00000265.771567113.087364 4.4557700.120038953.151072082.7728206811.65 0.15 RATE 1.7620432 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.096 0.049 74.6 2.680 0.049 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2007 Oct 23, 22:05 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org