IOTA/IOTA-ES occultation update for (419) Aurelia / TYC 0604-01147-1 event on 2009 Jul 04, 01:54 UT Visible from Africa Summary ------- On 2009 Jul 04 UT, the 129 km diameter asteroid (419) Aurelia will occult a 12.6 mag star in the constellation Pisces 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 1.0 mag to 13.0 mag (the magnitude of the asteroid) for at most 7.3 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: 97 * date and approx. time of event: 2009 Jul 04, 01:50 - 2009 Jul 04, 01:55 UT * midpoint of event [JD]: 2455016.5802 * magnitude of target star: 12.6 * magnitude drop [mag]: 1.0 * estimated maximum duration [s]: 7.3 * Moon: 90 % sunlit, 130° distance * Sun: 87° distance * rough path description: Africa The occultation path -------------------- * approximate projected width [km]: 161 * 1 sigma uncertainty interval [path widths]: +/- 0.38 * 1 sigma uncertainty interval [seconds]: +/- 2.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .034 +/- .032) * 1 sigma uncertainty ellipse (major, minor, PA): ( .035", .032", 85° ) * approx speed of asteroid's shadow [km/s]: 17.7191 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0604-01147-1 by 419 Aurelia on 2009 Jul 4 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 - 29 0 0 11 56 7 1 50 41 0 80 -55 11 11 46 12 40 55 .. .. .. 13 15 16 - 28 0 0 12 6 37 1 50 42 1 81 -55 11 22 11 12 51 30 .. .. .. 13 25 55 - 27 0 0 12 17 42 1 50 42 2 81 -55 11 33 10 13 2 40 10 59 37 13 37 9 - 26 0 0 12 29 21 1 50 42 3 81 -55 11 44 44 13 14 24 11 11 7 13 48 58 - 25 0 0 12 41 34 1 50 43 4 81 -54 11 56 52 13 26 43 11 23 11 14 1 21 - 24 0 0 12 54 21 1 50 43 5 81 -54 12 9 33 13 39 37 11 35 48 14 14 20 - 23 0 0 13 7 43 1 50 44 6 82 -54 12 22 49 13 53 5 11 48 59 14 27 52 - 22 0 0 13 21 39 1 50 45 7 82 -54 12 36 39 14 7 7 12 2 44 14 42 0 - 21 0 0 13 36 9 1 50 46 8 82 -53 12 51 2 14 21 44 12 17 3 14 56 42 - 20 0 0 13 51 13 1 50 47 9 82 -53 13 5 59 14 36 54 12 31 55 15 11 58 - 19 0 0 14 6 50 1 50 49 10 83 -52 13 21 30 14 52 39 12 47 20 15 27 48 - 18 0 0 14 23 1 1 50 50 11 83 -52 13 37 34 15 8 57 13 3 19 15 44 12 - 17 0 0 14 39 46 1 50 52 12 83 -51 13 54 11 15 25 50 13 19 51 16 1 10 - 16 0 0 14 57 4 1 50 54 13 84 -51 14 11 21 15 43 15 13 36 56 16 18 42 - 15 0 0 15 14 55 1 50 55 14 84 -50 14 29 5 16 1 15 13 54 33 16 36 48 - 14 0 0 15 33 19 1 50 57 15 84 -50 14 47 21 16 19 47 14 12 44 16 55 26 - 13 0 0 15 52 16 1 51 0 16 84 -49 15 6 9 16 38 52 14 31 26 17 14 38 - 12 0 0 16 11 45 1 51 2 17 85 -48 15 25 30 16 58 30 14 50 41 17 34 23 - 11 0 0 16 31 46 1 51 4 18 85 -48 15 45 23 17 18 40 15 10 27 17 54 40 - 10 0 0 16 52 20 1 51 7 19 86 -47 16 5 48 17 39 22 15 30 46 18 15 29 - 9 0 0 17 13 25 1 51 10 20 86 -46 16 26 44 18 0 36 15 51 35 18 36 50 - 8 0 0 17 35 1 1 51 13 21 86 -46 16 48 11 18 22 22 16 12 56 18 58 43 - 7 0 0 17 57 8 1 51 16 22 87 -45 17 10 9 18 44 39 16 34 47 19 21 7 - 6 0 0 18 19 46 1 51 19 23 87 -44 17 32 38 19 7 26 16 57 9 19 44 2 - 5 0 0 18 42 54 1 51 22 24 88 -43 17 55 36 19 30 44 17 20 0 20 7 27 - 4 0 0 19 6 31 1 51 25 25 88 -43 18 19 4 19 54 31 17 43 21 20 31 22 - 3 0 0 19 30 38 1 51 29 26 89 -42 18 43 2 20 18 48 18 7 11 20 55 47 - 2 0 0 19 55 14 1 51 33 27 89 -41 19 7 28 20 43 34 18 31 30 21 20 41 - 1 0 0 20 20 18 1 51 36 28 90 -40 19 32 22 21 8 48 18 56 17 21 46 3 0 0 0 20 45 50 1 51 40 29 90 -39 19 57 44 21 34 30 19 21 32 22 11 53 1 0 0 21 11 49 1 51 44 30 91 -38 20 23 33 22 0 39 19 47 13 22 38 11 2 0 0 21 38 14 1 51 48 31 92 -37 20 49 48 22 27 15 20 13 21 23 4 55 3 0 0 22 5 6 1 51 53 32 92 -37 21 16 29 22 54 17 20 39 55 23 32 5 4 0 0 22 32 22 1 51 57 33 93 -36 21 43 36 23 21 44 21 6 54 23 59 40 5 0 0 23 0 4 1 52 2 34 94 -35 22 11 7 23 49 36 21 34 18 24 27 40 6 0 0 23 28 9 1 52 6 34 95 -34 22 39 2 24 17 52 22 2 5 24 56 4 7 0 0 23 56 37 1 52 11 35 95 -33 23 7 20 24 46 30 22 30 16 25 24 51 8 0 0 24 25 28 1 52 16 36 96 -32 23 36 1 25 15 31 22 58 49 25 54 0 9 0 0 24 54 40 1 52 21 37 97 -31 24 5 2 25 44 54 23 27 44 26 23 31 10 0 0 25 24 12 1 52 26 38 98 -30 24 34 25 26 14 37 23 56 59 26 53 22 11 0 0 25 54 5 1 52 31 39 99 -29 25 4 8 26 44 39 24 26 34 27 23 32 12 0 0 26 24 16 1 52 36 40 100 -28 25 34 9 27 15 1 24 56 28 27 54 2 13 0 0 26 54 45 1 52 41 40 101 -27 26 4 28 27 45 40 25 26 40 28 24 48 14 0 0 27 25 31 1 52 47 41 102 -26 26 35 5 28 16 35 25 57 10 28 55 52 15 0 0 27 56 32 1 52 52 42 103 -25 27 5 57 28 47 47 26 27 55 29 27 11 16 0 0 28 27 49 1 52 58 43 104 -24 27 37 4 29 19 13 26 58 56 29 58 45 17 0 0 28 59 19 1 53 3 43 105 -23 28 8 26 29 50 53 27 30 11 30 30 32 18 0 0 29 31 3 1 53 9 44 106 -22 28 40 0 30 22 45 28 1 38 31 2 32 19 0 0 30 2 57 1 53 15 45 108 -21 29 11 46 30 54 49 28 33 18 31 34 42 20 0 0 30 35 3 1 53 20 46 109 -20 29 43 43 31 27 3 29 5 9 32 7 3 21 0 0 31 7 17 1 53 26 46 110 -19 30 15 50 31 59 26 29 37 10 32 39 33 22 0 0 31 39 40 1 53 32 47 112 -18 30 48 5 32 31 57 30 9 19 33 12 10 23 0 0 32 12 10 1 53 38 47 113 -17 31 20 27 33 4 34 30 41 36 33 44 54 24 0 0 32 44 45 1 53 44 48 115 -16 31 52 56 33 37 17 31 13 59 34 17 43 25 0 0 33 17 26 1 53 50 49 116 -15 32 25 29 34 10 5 31 46 27 34 50 36 26 0 0 33 50 9 1 53 56 49 118 -14 32 58 6 34 42 55 32 18 59 35 23 31 27 0 0 34 22 55 1 54 2 49 119 -13 33 30 46 35 15 48 32 51 35 35 56 29 28 0 0 34 55 42 1 54 8 50 121 -12 34 3 27 35 48 41 33 24 11 36 29 26 29 0 0 35 28 29 1 54 14 50 123 -11 34 36 8 36 21 33 33 56 49 37 2 23 30 0 0 36 1 14 1 54 20 51 124 -10 35 8 49 36 54 23 34 29 25 37 35 18 31 0 0 36 33 57 1 54 26 51 126 -9 35 41 27 37 27 11 35 2 0 38 8 9 32 0 0 37 6 36 1 54 32 51 128 -8 36 14 1 37 59 54 35 34 32 38 40 55 33 0 0 37 39 10 1 54 38 52 130 -7 36 46 32 38 32 32 36 6 59 39 13 36 34 0 0 38 11 38 1 54 44 52 132 -6 37 18 56 39 5 3 36 39 22 39 46 10 35 0 0 38 43 58 1 54 50 52 133 -5 37 51 14 39 37 26 37 11 37 40 18 36 36 0 0 39 16 10 1 54 56 52 135 -4 38 23 24 40 9 41 37 43 45 40 50 52 37 0 0 39 48 13 1 55 2 53 137 -3 38 55 24 40 41 45 38 15 45 41 22 58 38 0 0 40 20 5 1 55 8 53 139 -2 39 27 15 41 13 39 38 47 34 41 54 53 39 0 0 40 51 45 1 55 14 53 141 -1 39 58 54 41 45 20 39 19 13 42 26 35 40 0 0 41 23 13 1 55 20 53 143 0 40 30 21 42 16 48 39 50 40 42 58 3 Uncertainty in time = +/- 3 secs Prediction of 2009 Apr 12.0 Data for the target star ------------------------ * name: TYC 0604-01147-1 * constellation : Pisces * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 00 50 09.3221 DE: +09 25 00.297 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .029, .030 ) * V mag [mag]: 12.6 * B mag [mag]: 12.4 * Apparent position with proper motion RA(deg): 12.6660830949 DE(deg): 9.4698074076 * Equation of equinoxes (radians) : 0.000066478771973 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (419) Aurelia approx. diameter [km]: 129 approx. diameter ["]: .085 distance from Earth [AU]: 2.09300 * orbital information: orbit source: Preston date of fit: 2009 Apr 11 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1117 number of rejected observations: 132 time covered by the observations: 1900 Jul 21 - 2008 Aug 19 1 sigma uncertainty ellipse (major, minor, PA): 0.019, 0.010, 72° remarks: * orbital elements for (419) Aurelia : Mean anomaly = 48.29403292 deg Arg. of pericenter = 44.63978333 deg Long. of node = 229.30666227 deg Inclination = 3.92453584 deg Eccentricity = 0.25317854 Semimajor axis = 2.59576942 AU Perihelion dist = 1.93857631 AU Mag: H = 8.48, G = 0.15 Epoch of elements : MJD 55016.08000000 TDT (2009 Jul 04.080) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Jul 4 419 Aurelia 1h 55.5m UT 12.6 0 50 9.322 9 25 0.30TYC 0604-01147-1 12.4 13.0 129 7.3 2.093 2.574 17.72 61.4489 9.412 152.23 22.87 1.9248 -0.25306 0.54482 9.06843 4.21747 -0.00487 -0.00204 2000 46.8611572009 628.00000 44.639783229.306662 3.9245360.25317854 2.5957694 1.9385763 8.4 5.00.15 RATE 2.3567040 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.035 0.032 85 1.38 0.032 0 54933.0020090704_1147-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2009 May 30, 00:47 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org