IOTA/IOTA-ES occultation update for (3540) Protesilaos / TYC 2519-01389-1 event on 2012 Nov 19, 07:30 UT Visible from E USA Summary ------- On 2012 Nov 19 UT, the 88 km diameter asteroid (3540) Protesilaos will occult a 11.3 mag star in the constellation Leo Minor for observers along a path across E USA. In the case of an occultation, the combined light of the asteroid and the star will drop by 5.4 mag to 16.7 mag (the magnitude of the asteroid) for at most 4.9 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: 31 * date and approx. time of event: 2012 Nov 19, 07:24 - 2012 Nov 19, 07:30 UT * geocentric midpoint of event [JD]: 2456250.81272083 * magnitude of target star: 11.3 * magnitude drop [mag]: 5.4 * estimated maximum duration [s]: 4.9 * Moon: 37 % sunlit, 146° distance * Sun: 85° distance * rough path description: E USA The occultation path -------------------- * approximate projected width [km]: 95 * 1 sigma uncertainty interval [path widths]: +/- 2.18 * 1 sigma uncertainty interval [seconds]: +/- 11.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .069 +/- .056) * 1 sigma uncertainty ellipse (major, minor, PA): ( .073", .050", 119° ) * approx speed of asteroid's shadow [km/s]: 17.9709 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 2519-01389-1 by 3540 Protesilaos on 2012 Nov 19 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 -108 0 0 18 37 50 7 24 53 0 57 -83 .. .. .. 19 8 49 .. .. .. 21 25 41 -107 0 0 19 14 30 7 24 53 1 58 -82 18 43 36 19 45 33 .. .. .. 22 2 41 -106 0 0 19 51 16 7 24 53 2 58 -82 19 20 19 20 22 22 .. .. .. 22 39 45 -105 0 0 20 28 6 7 24 53 3 58 -81 19 57 6 20 59 15 .. .. .. 23 16 52 -104 0 0 21 5 0 7 24 54 5 59 -80 20 33 57 21 36 11 .. .. .. 23 54 0 -103 0 0 21 41 55 7 24 55 6 59 -79 21 10 49 22 13 9 .. .. .. 24 31 9 -102 0 0 22 18 50 7 24 55 7 60 -78 21 47 42 22 50 6 .. .. .. 25 8 17 -101 0 0 22 55 44 7 24 56 8 60 -77 22 24 34 23 27 3 .. .. .. 25 45 23 -100 0 0 23 32 36 7 24 57 9 60 -76 23 1 24 24 3 57 20 47 0 26 22 25 - 99 0 0 24 9 25 7 24 59 10 61 -75 23 38 12 24 40 47 21 23 41 26 59 22 - 98 0 0 24 46 9 7 25 0 11 61 -73 24 14 54 25 17 32 22 0 18 27 36 12 - 97 0 0 25 22 46 7 25 2 12 62 -72 24 51 31 25 54 11 22 36 51 28 12 55 - 96 0 0 25 59 17 7 25 3 13 62 -71 25 28 1 26 30 42 23 13 17 28 49 30 - 95 0 0 26 35 39 7 25 5 14 63 -70 26 4 23 27 7 4 23 49 37 29 25 54 - 94 0 0 27 11 51 7 25 7 15 63 -69 26 40 35 27 43 17 24 25 48 30 2 7 - 93 0 0 27 47 53 7 25 9 17 64 -68 27 16 36 28 19 18 25 1 50 30 38 8 - 92 0 0 28 23 42 7 25 11 18 64 -67 27 52 26 28 55 7 25 37 42 31 13 54 - 91 0 0 28 59 18 7 25 13 19 65 -66 28 28 2 29 30 42 26 13 21 31 49 26 - 90 0 0 29 34 39 7 25 16 20 65 -65 29 3 25 30 6 3 26 48 47 32 24 42 - 89 0 0 30 9 46 7 25 18 21 66 -64 29 38 32 30 41 8 27 24 0 32 59 41 - 88 0 0 30 44 35 7 25 21 22 66 -63 30 13 23 31 15 56 27 58 57 33 34 22 - 87 0 0 31 19 7 7 25 23 23 67 -62 30 47 57 31 50 26 28 33 38 34 8 44 - 86 0 0 31 53 20 7 25 26 24 67 -61 31 22 12 32 24 37 29 8 2 34 42 46 - 85 0 0 32 27 14 7 25 29 25 68 -60 31 56 9 32 58 29 29 42 8 35 16 27 - 84 0 0 33 0 48 7 25 32 26 69 -59 32 29 45 33 32 0 30 15 55 35 49 46 - 83 0 0 33 34 0 7 25 35 27 69 -58 33 3 0 34 5 9 30 49 22 36 22 43 - 82 0 0 34 6 50 7 25 38 28 70 -57 33 35 53 34 37 56 31 22 27 36 55 16 - 81 0 0 34 39 18 7 25 41 29 71 -56 34 8 24 35 10 20 31 55 12 37 27 25 - 80 0 0 35 11 22 7 25 44 30 71 -55 34 40 31 35 42 20 32 27 34 37 59 9 - 79 0 0 35 43 1 7 25 48 31 72 -54 35 12 14 36 13 56 32 59 33 38 30 27 - 78 0 0 36 14 16 7 25 51 32 73 -53 35 43 33 36 45 7 33 31 8 39 1 20 - 77 0 0 36 45 5 7 25 54 33 74 -53 36 14 26 37 15 52 34 2 18 39 31 45 - 76 0 0 37 15 28 7 25 58 33 74 -52 36 44 53 37 46 10 34 33 4 40 1 44 - 75 0 0 37 45 24 7 26 2 34 75 -51 37 14 54 38 16 2 35 3 23 40 31 15 - 74 0 0 38 14 53 7 26 5 35 76 -50 37 44 28 38 45 27 35 33 17 41 0 18 - 73 0 0 38 43 55 7 26 9 36 77 -49 38 13 35 39 14 24 36 2 44 41 28 53 - 72 0 0 39 12 29 7 26 13 37 78 -48 38 42 14 39 42 53 36 31 44 41 56 59 - 71 0 0 39 40 35 7 26 16 38 79 -47 39 10 25 40 10 53 37 0 17 42 24 36 - 70 0 0 40 8 13 7 26 20 39 80 -46 39 38 8 40 38 25 37 28 21 42 51 44 - 69 0 0 40 35 21 7 26 24 40 80 -45 40 5 21 41 5 28 37 55 58 43 18 22 - 68 0 0 41 2 1 7 26 28 40 81 -45 40 32 7 41 32 2 38 23 6 43 44 31 - 67 0 0 41 28 11 7 26 32 41 82 -44 40 58 23 41 58 7 38 49 46 44 10 10 - 66 0 0 41 53 52 7 26 36 42 83 -43 41 24 9 42 23 43 39 15 57 44 35 20 - 65 0 0 42 19 4 7 26 39 43 84 -42 41 49 27 42 48 48 39 41 38 44 59 59 - 64 0 0 42 43 46 7 26 43 44 85 -41 42 14 15 43 13 25 40 6 51 45 24 9 - 63 0 0 43 7 59 7 26 47 44 86 -40 42 38 33 43 37 31 40 31 34 45 47 48 - 62 0 0 43 31 41 7 26 51 45 87 -40 43 2 22 44 1 8 40 55 48 46 10 58 - 61 0 0 43 54 55 7 26 55 46 88 -39 43 25 41 44 24 15 41 19 32 46 33 38 - 60 0 0 44 17 38 7 26 59 47 89 -38 43 48 31 44 46 53 41 42 47 46 55 48 - 59 0 0 44 39 52 7 27 3 47 91 -37 44 10 51 45 9 1 42 5 33 47 17 29 - 58 0 0 45 1 37 7 27 7 48 92 -37 44 32 41 45 30 39 42 27 49 47 38 40 - 57 0 0 45 22 52 7 27 11 49 93 -36 44 54 3 45 51 48 42 49 36 47 59 21 - 56 0 0 45 43 38 7 27 15 49 94 -35 45 14 54 46 12 28 43 10 53 48 19 34 - 55 0 0 46 3 55 7 27 19 50 95 -34 45 35 17 46 32 39 43 31 41 48 39 17 - 54 0 0 46 23 42 7 27 24 51 96 -34 45 55 11 46 52 20 43 52 0 48 58 31 - 53 0 0 46 43 1 7 27 28 51 98 -33 46 14 35 47 11 33 44 11 50 49 17 17 - 52 0 0 47 1 51 7 27 32 52 99 -32 46 33 31 47 30 17 44 31 11 49 35 34 - 51 0 0 47 20 12 7 27 36 53 100 -31 46 51 58 47 48 32 44 50 3 49 53 22 - 50 0 0 47 38 5 7 27 40 53 102 -31 47 9 57 48 6 19 45 8 27 50 10 43 - 49 0 0 47 55 30 7 27 44 54 103 -30 47 27 28 48 23 38 45 26 22 50 27 36 - 48 0 0 48 12 27 7 27 48 54 104 -29 47 44 30 48 40 29 45 43 48 50 44 1 - 47 0 0 48 28 56 7 27 52 55 106 -29 48 1 5 48 56 53 46 0 47 50 59 59 - 46 0 0 48 44 57 7 27 56 56 107 -28 48 17 12 49 12 49 46 17 18 51 15 29 - 45 0 0 49 0 32 7 28 0 56 108 -27 48 32 52 49 28 17 46 33 21 51 30 33 - 44 0 0 49 15 39 7 28 4 57 110 -27 48 48 4 49 43 19 46 48 56 51 45 11 - 43 0 0 49 30 19 7 28 8 57 111 -26 49 2 50 49 57 54 47 4 4 51 59 21 - 42 0 0 49 44 33 7 28 12 58 113 -25 49 17 9 50 12 2 47 18 45 52 13 6 - 41 0 0 49 58 20 7 28 16 58 114 -25 49 31 1 50 25 44 47 32 59 52 26 25 - 40 0 0 50 11 41 7 28 20 59 116 -24 49 44 27 50 39 0 47 46 46 52 39 19 - 39 0 0 50 24 36 7 28 24 59 118 -23 49 57 27 50 51 50 48 0 7 52 51 47 - 38 0 0 50 37 5 7 28 28 60 119 -23 50 10 1 51 4 15 48 13 1 53 3 50 - 37 0 0 50 49 9 7 28 32 60 121 -22 50 22 10 51 16 14 48 25 30 53 15 28 - 36 0 0 51 0 48 7 28 36 61 123 -21 50 33 53 51 27 48 48 37 32 53 26 41 - 35 0 0 51 12 1 7 28 39 61 124 -21 50 45 11 51 38 57 48 49 9 53 37 31 - 34 0 0 51 22 50 7 28 43 61 126 -20 50 56 4 51 49 42 49 0 20 53 47 56 - 33 0 0 51 33 14 7 28 47 62 128 -20 51 6 32 52 0 2 49 11 6 53 57 57 - 32 0 0 51 43 14 7 28 51 62 130 -19 51 16 36 52 9 57 49 21 27 54 7 34 - 31 0 0 51 52 50 7 28 55 63 131 -18 51 26 15 52 19 29 49 31 23 54 16 48 - 30 0 0 52 2 1 7 28 59 63 133 -18 51 35 31 52 28 37 49 40 54 54 25 39 - 29 0 0 52 10 49 7 29 3 63 135 -17 51 44 22 52 37 21 49 50 1 54 34 7 - 28 0 0 52 19 13 7 29 7 64 137 -17 51 52 50 52 45 42 49 58 44 54 42 12 - 27 0 0 52 27 14 7 29 10 64 139 -16 52 0 54 52 53 39 50 7 2 54 49 54 - 26 0 0 52 34 52 7 29 14 64 141 -15 52 8 35 53 1 14 50 14 56 54 57 14 - 25 0 0 52 42 6 7 29 18 65 143 -15 52 15 52 53 8 25 50 22 27 55 4 12 - 24 0 0 52 48 58 7 29 22 65 145 -14 52 22 47 53 15 14 50 29 34 55 10 47 - 23 0 0 52 55 27 7 29 26 65 147 -14 52 29 18 53 21 40 50 36 17 55 17 1 - 22 0 0 53 1 33 7 29 30 65 149 -13 52 35 27 53 27 43 50 42 37 55 22 53 - 21 0 0 53 7 17 7 29 33 66 151 -13 52 41 14 53 33 25 50 48 34 55 28 23 - 20 0 0 53 12 38 7 29 37 66 153 -12 52 46 37 53 38 44 50 54 8 55 33 32 - 19 0 0 53 17 37 7 29 41 66 155 -11 52 51 39 53 43 41 50 59 18 55 38 19 - 18 0 0 53 22 15 7 29 45 66 158 -11 52 56 18 53 48 16 51 4 6 55 42 45 - 17 0 0 53 26 30 7 29 48 66 160 -10 53 0 35 53 52 29 51 8 31 55 46 50 - 16 0 0 53 30 23 7 29 52 66 162 -10 53 4 30 53 56 21 51 12 33 55 50 34 - 15 0 0 53 33 55 7 29 56 66 164 -9 53 8 3 53 59 51 51 16 13 55 53 57 - 14 0 0 53 37 5 7 30 0 67 166 -9 53 11 15 54 2 59 51 19 30 55 57 0 - 13 0 0 53 39 53 7 30 3 67 169 -8 53 14 4 54 5 47 51 22 25 55 59 41 - 12 0 0 53 42 20 7 30 7 67 171 -8 53 16 32 54 8 12 51 24 57 56 2 2 - 11 0 0 53 44 25 7 30 11 67 173 -7 53 18 38 54 10 17 51 27 7 56 4 2 - 10 0 0 53 46 9 7 30 15 67 175 -7 53 20 23 54 12 0 51 28 55 56 5 42 - 9 0 0 53 47 31 7 30 18 67 178 -6 53 21 46 54 13 21 51 30 21 56 7 1 - 8 0 0 53 48 32 7 30 22 67 180 -5 53 22 47 54 14 22 51 31 24 56 7 59 - 7 0 0 53 49 12 7 30 26 67 182 -5 53 23 27 54 15 1 51 32 5 56 8 37 - 6 0 0 53 49 30 7 30 30 67 184 -4 53 23 46 54 15 20 51 32 25 56 8 55 - 5 0 0 53 49 27 7 30 33 67 187 -4 53 23 43 54 15 17 51 32 22 56 8 52 - 4 0 0 53 49 3 7 30 37 67 189 -3 53 23 19 54 14 53 51 31 56 56 8 29 - 3 0 0 53 48 18 7 30 41 67 191 -3 53 22 33 54 14 8 51 31 9 56 7 46 - 2 0 0 53 47 11 7 30 44 66 193 -2 53 21 25 54 13 1 51 30 0 56 6 42 - 1 0 0 53 45 43 7 30 48 66 195 -2 53 19 57 54 11 34 51 28 28 56 5 17 0 0 0 53 43 53 7 30 52 66 198 -1 53 18 6 54 9 45 51 26 34 56 3 32 1 0 0 53 41 42 7 30 56 66 200 -1 53 15 54 54 7 35 51 24 18 56 1 26 2 0 0 53 39 10 7 30 59 66 202 0 53 13 21 54 5 4 51 21 40 55 59 0 Uncertainty in time = +/- 14 secs Prediction of 2012 Nov 16.0 Data for the target star ------------------------ * name: TYC 2519-01389-1 * constellation : Leo Minor * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 10 52 56.9838 DE: +30 47 51.944 * position source: mpos:UCAC4 pm:UCAC4 * standard error: RA,DE ["]: ( .039, .029 ) * V mag [mag]: 11.3 * B mag [mag]: 11.9 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3540) Protesilaos approx. diameter [km]: 88 approx. diameter ["]: .026 distance from Earth [AU]: 4.62300 * orbital information: orbit source: Preston date of fit: 2012 Jul 10 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 611 number of rejected observations: 8 time covered by the observations: 1953 Feb 14 - 2012 Apr 28 1 sigma uncertainty ellipse (major, minor, PA): 0.064, 0.042, 129° remarks: * orbital elements for (3540) Protesilaos : Mean anomaly = 356.38045497 deg Arg. of pericenter = 115.66226400 deg Long. of node = 26.43755834 deg Inclination = 23.31240988 deg Eccentricity = 0.11778416 Semimajor axis = 5.26354694 AU Perihelion dist = 4.64358447 AU Mag: H = 9.44, G = 0.15 Epoch of elements : MJD 56250.31300000 TDT (2012 Nov 19.313) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Nov 19 3540 Protesilaos 7h 30.3m UT 11.3 10 52 56.984 30 47 51.94TYC 2519-01389-1 11.9 16.7 88 4.9 4.623 1.497 0.40 -8.0776 30.798 63.79 -19.57 7.5053 -0.00939 0.38810 10.14114 0.20934 -0.00548 0.00267 2000 356.35490920121119.00000115.662264 26.437558 23.3124100.11778416 5.2635469 4.6435845 9.3 5.00.15 RATE 0.8161800 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.073 0.050 119 3.18 0.057 0 0-2 4 056247.0020121119_1389-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Jul 10, 02:35 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org