IOTA/IOTA-ES occultation update for (775) Lumiere / TYC 2421-00831-1 event on 2012 Oct 11, 04:07 UT Visible from Europe, Caribbean Summary ------- On 2012 Oct 11 UT, the 29 km diameter asteroid (775) Lumiere will occult a 11.7 mag star in the constellation Auriga for observers along a path across Europe, Caribbean. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.8 mag to 15.4 mag (the magnitude of the asteroid) for at most 2.9 seconds. This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Alice Monet, TMO astrometry for the asteroid kindly provided by Bill Owen, 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: 2012 Oct 11, 03:57 - 2012 Oct 11, 04:09 UT * geocentric midpoint of event [JD]: 2456211.67189583 * magnitude of target star: 11.7 * magnitude drop [mag]: 3.8 * estimated maximum duration [s]: 2.9 * Moon: 22 % sunlit, 49° distance * Sun: 103° distance * rough path description: Europe, Caribbean The occultation path -------------------- * approximate projected width [km]: 30 * 1 sigma uncertainty interval [path widths]: +/- 2.66 * 1 sigma uncertainty interval [seconds]: +/- 5.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .036 +/- .045) * 1 sigma uncertainty ellipse (major, minor, PA): ( .045", .036", 1° ) * approx speed of asteroid's shadow [km/s]: 9.9191 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 2421-00831-1 by 775 Lumiere on 2012 Oct 11 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 - 79 0 0 10 55 52 3 57 9 1 59 -73 10 46 17 11 5 27 .. .. .. 11 56 36 - 78 0 0 11 32 13 3 57 10 2 59 -74 11 22 37 11 41 49 .. .. .. 12 33 2 - 77 0 0 12 8 40 3 57 10 3 59 -75 11 59 3 12 18 16 .. .. .. 13 9 34 - 76 0 0 12 45 11 3 57 11 4 59 -76 12 35 34 12 54 49 11 44 34 13 46 10 - 75 0 0 13 21 47 3 57 12 6 60 -76 13 12 9 13 31 25 12 21 6 14 22 49 - 74 0 0 13 58 25 3 57 14 7 60 -77 13 48 47 14 8 3 12 57 40 14 59 30 - 73 0 0 14 35 4 3 57 16 8 60 -77 14 25 25 14 44 43 13 34 16 15 36 12 - 72 0 0 15 11 42 3 57 18 9 60 -78 15 2 4 15 21 22 14 10 53 16 12 53 - 71 0 0 15 48 20 3 57 20 10 61 -78 15 38 41 15 58 0 14 47 28 16 49 33 - 70 0 0 16 24 55 3 57 22 11 61 -78 16 15 16 16 34 35 15 24 2 17 26 9 - 69 0 0 17 1 26 3 57 25 12 61 -78 16 51 47 17 11 6 16 0 32 18 2 42 - 68 0 0 17 37 53 3 57 28 14 62 -78 17 28 13 17 47 33 16 36 58 18 39 8 - 67 0 0 18 14 13 3 57 31 15 62 -78 18 4 33 18 23 53 17 13 18 19 15 28 - 66 0 0 18 50 25 3 57 35 16 62 -78 18 40 46 19 0 5 17 49 31 19 51 40 - 65 0 0 19 26 29 3 57 38 17 63 -78 19 16 50 19 36 9 18 25 36 20 27 43 - 64 0 0 20 2 23 3 57 42 18 63 -77 19 52 44 20 12 3 19 1 31 21 3 36 - 63 0 0 20 38 6 3 57 47 19 63 -77 20 28 27 20 47 45 19 37 16 21 39 17 - 62 0 0 21 13 37 3 57 51 20 64 -76 21 3 59 21 23 16 20 12 50 22 14 45 - 61 0 0 21 48 55 3 57 56 21 64 -75 21 39 17 21 58 33 20 48 10 22 49 59 - 60 0 0 22 23 58 3 58 0 23 65 -75 22 14 20 22 33 36 21 23 17 23 24 59 - 59 0 0 22 58 46 3 58 5 24 65 -74 22 49 9 23 8 23 21 58 9 23 59 43 - 58 0 0 23 33 17 3 58 11 25 66 -73 23 23 41 23 42 53 22 32 44 24 34 9 - 57 0 0 24 7 31 3 58 16 26 66 -72 23 57 55 24 17 6 23 7 3 25 8 18 - 56 0 0 24 41 26 3 58 22 27 66 -71 24 31 51 24 51 1 23 41 4 25 42 8 - 55 0 0 25 15 2 3 58 28 28 67 -70 25 5 28 25 24 36 24 14 45 26 15 38 - 54 0 0 25 48 17 3 58 33 29 68 -70 25 38 45 25 57 50 24 48 7 26 48 47 - 53 0 0 26 21 12 3 58 40 30 68 -69 26 11 40 26 30 44 25 21 8 27 21 35 - 52 0 0 26 53 44 3 58 46 31 69 -68 26 44 14 27 3 15 25 53 47 27 54 0 - 51 0 0 27 25 53 3 58 52 32 69 -67 27 16 24 27 35 23 26 26 4 28 26 2 - 50 0 0 27 57 39 3 58 59 33 70 -66 27 48 11 28 7 8 26 57 58 28 57 40 - 49 0 0 28 29 1 3 59 6 34 70 -65 28 19 34 28 38 28 27 29 27 29 28 53 - 48 0 0 28 59 58 3 59 13 35 71 -64 28 50 32 29 9 23 28 0 32 29 59 41 - 47 0 0 29 30 29 3 59 20 36 72 -63 29 21 5 29 39 53 28 31 12 30 30 4 - 46 0 0 30 0 34 3 59 27 37 72 -62 29 51 11 30 9 57 29 1 26 31 0 0 - 45 0 0 30 30 12 3 59 34 38 73 -61 30 20 51 30 39 34 29 31 14 31 29 29 - 44 0 0 30 59 24 3 59 41 39 74 -60 30 50 4 31 8 44 30 0 35 31 58 30 - 43 0 0 31 28 7 3 59 49 40 74 -59 31 18 49 31 37 26 30 29 28 32 27 4 - 42 0 0 31 56 23 3 59 56 41 75 -58 31 47 6 32 5 40 30 57 54 32 55 9 - 41 0 0 32 24 10 4 0 4 42 76 -57 32 14 55 32 33 25 31 25 51 33 22 46 - 40 0 0 32 51 28 4 0 12 43 77 -56 32 42 15 33 0 42 31 53 20 33 49 54 - 39 0 0 33 18 18 4 0 20 44 77 -55 33 9 6 33 27 29 32 20 20 34 16 32 - 38 0 0 33 44 38 4 0 27 45 78 -55 33 35 28 33 53 48 32 46 50 34 42 41 - 37 0 0 34 10 28 4 0 35 46 79 -54 34 1 20 34 19 36 33 12 52 35 8 21 - 36 0 0 34 35 49 4 0 43 47 80 -53 34 26 42 34 44 55 33 38 23 35 33 30 - 35 0 0 35 0 39 4 0 51 48 81 -52 34 51 35 35 9 44 34 3 25 35 58 10 - 34 0 0 35 25 0 4 1 0 49 82 -51 35 15 57 35 34 3 34 27 56 36 22 19 - 33 0 0 35 48 50 4 1 8 50 83 -50 35 39 49 35 57 52 34 51 58 36 45 59 - 32 0 0 36 12 10 4 1 16 50 84 -49 36 3 11 36 21 10 35 15 29 37 9 7 - 31 0 0 36 35 0 4 1 24 51 85 -48 36 26 3 36 43 58 35 38 30 37 31 46 - 30 0 0 36 57 19 4 1 32 52 86 -47 36 48 24 37 6 15 36 1 0 37 53 54 - 29 0 0 37 19 8 4 1 41 53 87 -46 37 10 14 37 28 3 36 23 0 38 15 32 - 28 0 0 37 40 27 4 1 49 54 88 -46 37 31 35 37 49 19 36 44 30 38 36 39 - 27 0 0 38 1 15 4 1 57 55 89 -45 37 52 25 38 10 6 37 5 29 38 57 16 - 26 0 0 38 21 33 4 2 6 55 90 -44 38 12 44 38 30 22 37 25 58 39 17 23 - 25 0 0 38 41 20 4 2 14 56 91 -43 38 32 33 38 50 8 37 45 56 39 36 59 - 24 0 0 39 0 38 4 2 23 57 92 -42 38 51 53 39 9 23 38 5 24 39 56 6 - 23 0 0 39 19 25 4 2 31 58 93 -41 39 10 42 39 28 9 38 24 22 40 14 42 - 22 0 0 39 37 42 4 2 40 59 94 -40 39 29 1 39 46 25 38 42 50 40 32 49 - 21 0 0 39 55 30 4 2 48 59 96 -40 39 46 50 40 4 11 39 0 48 40 50 26 - 20 0 0 40 12 48 4 2 56 60 97 -39 40 4 9 40 21 27 39 18 16 41 7 34 - 19 0 0 40 29 36 4 3 5 61 98 -38 40 20 59 40 38 13 39 35 14 41 24 11 - 18 0 0 40 45 54 4 3 13 62 100 -37 40 37 19 40 54 30 39 51 42 41 40 20 - 17 0 0 41 1 44 4 3 22 62 101 -36 40 53 10 41 10 18 40 7 41 41 56 0 - 16 0 0 41 17 4 4 3 30 63 103 -35 41 8 32 41 25 37 40 23 11 42 11 10 - 15 0 0 41 31 55 4 3 39 64 104 -35 41 23 24 41 40 26 40 38 12 42 25 52 - 14 0 0 41 46 18 4 3 47 64 106 -34 41 37 48 41 54 47 40 52 43 42 40 5 - 13 0 0 42 0 11 4 3 56 65 107 -33 41 51 43 42 8 40 41 6 46 42 53 50 - 12 0 0 42 13 36 4 4 4 66 109 -32 42 5 10 42 22 3 41 20 20 43 7 6 - 11 0 0 42 26 33 4 4 13 66 111 -31 42 18 8 42 34 59 41 33 25 43 19 55 - 10 0 0 42 39 2 4 4 21 67 113 -31 42 30 38 42 47 26 41 46 2 43 32 15 - 9 0 0 42 51 3 4 4 29 68 115 -30 42 42 40 42 59 26 41 58 11 43 44 8 - 8 0 0 43 2 36 4 4 38 68 117 -29 42 54 14 43 10 58 42 9 51 43 55 33 - 7 0 0 43 13 41 4 4 46 69 119 -28 43 5 21 43 22 2 42 21 4 44 6 31 - 6 0 0 43 24 19 4 4 55 69 121 -28 43 16 0 43 32 39 42 31 50 44 17 1 - 5 0 0 43 34 30 4 5 3 70 123 -27 43 26 12 43 42 48 42 42 7 44 27 5 - 4 0 0 43 44 13 4 5 11 70 125 -26 43 35 56 43 52 31 42 51 57 44 36 42 - 3 0 0 43 53 30 4 5 20 71 127 -25 43 45 14 44 1 46 43 1 20 44 45 52 - 2 0 0 44 2 20 4 5 28 71 130 -24 43 54 5 44 10 35 43 10 16 44 54 35 - 1 0 0 44 10 43 4 5 37 72 132 -24 44 2 29 44 18 57 43 18 45 45 2 52 0 0 0 44 18 39 4 5 45 72 135 -23 44 10 26 44 26 53 43 26 47 45 10 43 1 0 0 44 26 9 4 5 53 73 138 -22 44 17 57 44 34 22 43 34 23 45 18 8 2 0 0 44 33 13 4 6 1 73 141 -21 44 25 2 44 41 25 43 41 32 45 25 7 3 0 0 44 39 51 4 6 10 73 144 -21 44 31 40 44 48 2 43 48 14 45 31 40 4 0 0 44 46 3 4 6 18 74 147 -20 44 37 53 44 54 13 43 54 30 45 37 47 5 0 0 44 51 49 4 6 26 74 150 -19 44 43 39 44 59 58 44 0 20 45 43 29 6 0 0 44 57 9 4 6 35 74 153 -18 44 49 0 45 5 18 44 5 44 45 48 45 7 0 0 45 2 3 4 6 43 75 156 -18 44 53 55 45 10 12 44 10 42 45 53 36 8 0 0 45 6 32 4 6 51 75 160 -17 44 58 24 45 14 40 44 15 14 45 58 1 9 0 0 45 10 36 4 6 59 75 163 -16 45 2 28 45 18 43 44 19 21 46 2 2 10 0 0 45 14 14 4 7 7 75 167 -16 45 6 7 45 22 21 44 23 1 46 5 37 11 0 0 45 17 26 4 7 16 75 170 -15 45 9 20 45 25 33 44 26 16 46 8 47 12 0 0 45 20 13 4 7 24 75 174 -14 45 12 7 45 28 20 44 29 6 46 11 33 13 0 0 45 22 36 4 7 32 75 177 -13 45 14 30 45 30 42 44 31 30 46 13 53 14 0 0 45 24 33 4 7 40 75 181 -13 45 16 27 45 32 38 44 33 28 46 15 49 15 0 0 45 26 4 4 7 48 75 184 -12 45 17 59 45 34 10 44 35 1 46 17 19 16 0 0 45 27 11 4 7 57 75 188 -11 45 19 6 45 35 17 44 36 8 46 18 25 17 0 0 45 27 53 4 8 5 75 191 -10 45 19 47 45 35 58 44 36 51 46 19 6 18 0 0 45 28 9 4 8 13 75 195 -10 45 20 4 45 36 15 44 37 7 46 19 23 19 0 0 45 28 1 4 8 21 75 198 -9 45 19 56 45 36 6 44 36 59 46 19 14 20 0 0 45 27 27 4 8 29 74 201 -8 45 19 22 45 35 33 44 36 25 46 18 41 21 0 0 45 26 29 4 8 37 74 205 -8 45 18 23 45 34 35 44 35 25 46 17 44 22 0 0 45 25 5 4 8 45 74 208 -7 45 17 0 45 33 11 44 34 1 46 16 21 23 0 0 45 23 16 4 8 53 73 211 -6 45 15 11 45 31 22 44 32 11 46 14 34 24 0 0 45 21 2 4 9 2 73 214 -5 45 12 56 45 29 9 44 29 55 46 12 21 25 0 0 45 18 23 4 9 10 73 216 -5 45 10 17 45 26 30 44 27 14 46 9 44 26 0 0 45 15 19 4 9 18 72 219 -4 45 7 12 45 23 26 44 24 8 46 6 42 27 0 0 45 11 50 4 9 26 72 222 -3 45 3 42 45 19 57 44 20 35 46 3 15 28 0 0 45 7 55 4 9 34 71 224 -2 44 59 47 45 16 3 44 16 38 45 59 23 29 0 0 45 3 34 4 9 42 71 227 -2 44 55 26 45 11 43 44 12 14 45 55 6 30 0 0 44 58 48 4 9 50 71 229 -1 44 50 40 45 6 57 44 7 25 45 50 24 31 0 0 44 53 37 4 9 58 70 231 0 44 45 28 45 1 47 44 2 10 45 45 16 Uncertainty in time = +/- 8 secs Prediction of 2012 Oct 8.0 Data for the target star ------------------------ * name: TYC 2421-00831-1 * constellation : Auriga * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 06 22 30.5120 DE: +30 47 05.927 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .023, .042 ) * V mag [mag]: 11.7 * B mag [mag]: 11.9 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (775) Lumiere approx. diameter [km]: 29 approx. diameter ["]: .017 distance from Earth [AU]: 2.42200 * orbital information: orbit source: Preston date of fit: 2012 Oct 07 source of used astrometry: FASTT TMO MPC (via Astdys) number of used observations: 1020 number of rejected observations: 36 time covered by the observations: 1930 Mar 26 - 2012 Sep 30 1 sigma uncertainty ellipse (major, minor, PA): 0.028, 0.016, 102° remarks: * orbital elements for (775) Lumiere : Mean anomaly = 333.25716986 deg Arg. of pericenter = 167.29671037 deg Long. of node = 297.78572845 deg Inclination = 9.28211451 deg Eccentricity = 0.07357022 Semimajor axis = 3.01483555 AU Perihelion dist = 2.79303343 AU Mag: H = 10.18, G = 0.15 Epoch of elements : MJD 56211.17200000 TDT (2012 Oct 11.172) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Oct 11 775 Lumiere 4h 7.5m UT 11.7 6 22 30.512 30 47 5.93TYC 2421-00831-1 11.9 15.4 29 2.9 2.422 1.575 0.83 13.5883 30.785 114.80 -7.16 4.1255 -0.01020 0.24843 5.59400 0.22722 -0.00565 0.00006 2000 333.03650420121010.00000167.296710297.785728 9.2821150.07357022 3.0148356 2.793033410.2 5.00.15 RATE 1.8828190 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.045 0.036 1 3.66 0.044 0 0 0-3 056208.0020121011_0831-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Oct 07, 18:30 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org