IOTA/IOTA-ES occultation update for (13) Egeria / TYC 2488-00479-1 event on 2012 Oct 28, 00:44 UT Visible from Russia, Europe, N Africa Summary ------- On 2012 Oct 28 UT, the 215 km diameter asteroid (13) Egeria will occult a 8.1 mag star in the constellation Lynx for observers along a path across Russia, Europe, N Africa. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.4 mag to 11.5 mag (the magnitude of the asteroid) for at most 10.2 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: . The event at a glimpse ---------------------- * Rank: 99 * date and approx. time of event: 2012 Oct 28, 00:40 - 2012 Oct 28, 00:45 UT * geocentric midpoint of event [JD]: 2456228.53082083 * magnitude of target star: 8.1 * magnitude drop [mag]: 3.4 * estimated maximum duration [s]: 10.2 * Moon: 97 % sunlit, 111° distance * Sun: 87° distance * rough path description: Russia, Europe, N Africa The occultation path -------------------- * approximate projected width [km]: 255 * 1 sigma uncertainty interval [path widths]: +/- 0.22 * 1 sigma uncertainty interval [seconds]: +/- 1.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .029 +/- .030) * 1 sigma uncertainty ellipse (major, minor, PA): ( .030", .029", 2° ) * approx speed of asteroid's shadow [km/s]: 21.2423 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 2488-00479-1 by 13 Egeria on 2012 Oct 28 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 - 16 0 0 20 30 44 0 40 8 0 54 -82 .. .. .. 21 57 19 .. .. .. 22 35 58 - 15 0 0 21 11 36 0 40 8 1 55 -82 19 46 16 22 38 36 19 9 12 23 17 26 - 14 0 0 21 52 49 0 40 9 2 55 -81 20 27 6 23 20 14 19 49 53 23 59 16 - 13 0 0 22 34 23 0 40 9 4 55 -81 21 8 17 24 2 12 20 30 54 24 41 26 - 12 0 0 23 16 16 0 40 10 5 56 -80 21 49 47 24 44 29 21 12 15 25 23 54 - 11 0 0 23 58 27 0 40 10 6 56 -79 22 31 35 25 27 3 21 53 53 26 6 39 - 10 0 0 24 40 53 0 40 11 7 57 -78 23 13 40 26 9 52 22 35 49 26 49 38 - 9 0 0 25 23 33 0 40 12 8 57 -77 23 55 59 26 52 55 23 17 59 27 32 51 - 8 0 0 26 6 26 0 40 13 9 58 -76 24 38 31 27 36 10 24 0 22 28 16 16 - 7 0 0 26 49 29 0 40 14 10 58 -75 25 21 15 28 19 34 24 42 58 28 59 50 - 6 0 0 27 32 41 0 40 16 12 59 -74 26 4 8 29 3 6 25 25 43 29 43 31 - 5 0 0 28 16 0 0 40 17 13 59 -73 26 47 9 29 46 45 26 8 36 30 27 19 - 4 0 0 28 59 25 0 40 19 14 60 -72 27 30 16 30 30 28 26 51 35 31 11 10 - 3 0 0 29 42 52 0 40 20 15 60 -71 28 13 27 31 14 13 27 34 39 31 55 3 - 2 0 0 30 26 21 0 40 22 16 61 -69 28 56 40 31 57 58 28 17 46 32 38 56 - 1 0 0 31 9 49 0 40 24 17 61 -68 29 39 54 32 41 42 29 0 54 33 22 47 0 0 0 31 53 15 0 40 26 18 62 -67 30 23 6 33 25 22 29 44 0 34 6 34 1 0 0 32 36 37 0 40 29 19 62 -66 31 6 15 34 8 56 30 27 4 34 50 14 2 0 0 33 19 52 0 40 31 20 63 -65 31 49 19 34 52 23 31 10 3 35 33 47 3 0 0 34 2 58 0 40 33 21 64 -64 32 32 15 35 35 41 31 52 55 36 17 9 4 0 0 34 45 55 0 40 36 23 64 -63 33 15 3 36 18 47 32 35 39 37 0 19 5 0 0 35 28 39 0 40 39 24 65 -62 33 57 40 37 1 39 33 18 13 37 43 15 6 0 0 36 11 10 0 40 41 25 66 -61 34 40 4 37 44 16 34 0 34 38 25 56 7 0 0 36 53 25 0 40 44 26 67 -60 35 22 14 38 26 37 34 42 42 39 8 19 8 0 0 37 35 22 0 40 47 27 67 -59 36 4 7 39 8 38 35 24 34 39 50 22 9 0 0 38 17 1 0 40 50 28 68 -58 36 45 43 39 50 19 36 6 9 40 32 4 10 0 0 38 58 18 0 40 53 29 69 -56 37 27 0 40 31 37 36 47 25 41 13 23 11 0 0 39 39 13 0 40 56 30 70 -55 38 7 55 41 12 32 37 28 20 41 54 17 12 0 0 40 19 44 0 41 0 31 71 -54 38 48 28 41 53 2 38 8 53 42 34 46 13 0 0 40 59 50 0 41 3 32 72 -53 39 28 36 42 33 4 38 49 3 43 14 47 14 0 0 41 39 29 0 41 6 32 72 -52 40 8 19 43 12 38 39 28 48 43 54 19 15 0 0 42 18 40 0 41 9 33 73 -51 40 47 36 43 51 43 40 8 7 44 33 21 16 0 0 42 57 21 0 41 13 34 74 -50 41 26 24 44 30 17 40 46 58 45 11 52 17 0 0 43 35 32 0 41 16 35 75 -49 42 4 43 45 8 20 41 25 20 45 49 50 18 0 0 44 13 11 0 41 20 36 76 -48 42 42 32 45 45 49 42 3 13 46 27 15 19 0 0 44 50 18 0 41 23 37 77 -48 43 19 49 46 22 44 42 40 35 47 4 5 20 0 0 45 26 51 0 41 27 38 78 -47 43 56 34 46 59 5 43 17 25 47 40 20 21 0 0 46 2 50 0 41 30 38 80 -46 44 32 46 47 34 50 43 53 42 48 15 58 22 0 0 46 38 14 0 41 34 39 81 -45 45 8 24 48 9 59 44 29 26 48 51 0 23 0 0 47 13 3 0 41 37 40 82 -44 45 43 27 48 44 31 45 4 35 49 25 25 24 0 0 47 47 15 0 41 41 41 83 -43 46 17 55 49 18 26 45 39 10 49 59 12 25 0 0 48 20 50 0 41 45 42 84 -42 46 51 47 49 51 43 46 13 9 50 32 21 26 0 0 48 53 48 0 41 48 42 85 -41 47 25 3 50 24 22 46 46 33 51 4 51 27 0 0 49 26 8 0 41 52 43 86 -40 47 57 43 50 56 23 47 19 20 51 36 42 28 0 0 49 57 51 0 41 55 44 88 -40 48 29 45 51 27 45 47 51 31 52 7 55 29 0 0 50 28 56 0 41 59 44 89 -39 49 1 10 51 58 28 48 23 4 52 38 28 30 0 0 50 59 22 0 42 2 45 90 -38 49 31 58 52 28 32 48 54 1 53 8 22 31 0 0 51 29 11 0 42 6 46 92 -37 50 2 8 52 57 57 49 24 20 53 37 36 32 0 0 51 58 21 0 42 10 46 93 -36 50 31 40 53 26 44 49 54 2 54 6 12 33 0 0 52 26 53 0 42 13 47 94 -36 51 0 35 53 54 52 50 23 7 54 34 9 34 0 0 52 54 47 0 42 17 47 96 -35 51 28 53 54 22 21 50 51 34 55 1 27 35 0 0 53 22 3 0 42 20 48 97 -34 51 56 32 54 49 13 51 19 24 55 28 7 36 0 0 53 48 42 0 42 23 48 98 -33 52 23 35 55 15 26 51 46 37 55 54 8 37 0 0 54 14 43 0 42 27 49 100 -33 52 50 1 55 41 1 52 13 12 56 19 32 38 0 0 54 40 7 0 42 30 49 101 -32 53 15 49 56 5 59 52 39 11 56 44 18 39 0 0 55 4 54 0 42 34 50 103 -31 53 41 1 56 30 20 53 4 34 57 8 26 40 0 0 55 29 5 0 42 37 50 104 -30 54 5 37 56 54 4 53 29 20 57 31 58 41 0 0 55 52 39 0 42 40 51 106 -30 54 29 36 57 17 12 53 53 31 57 54 54 42 0 0 56 15 38 0 42 44 51 107 -29 54 53 0 57 39 44 54 17 5 58 17 14 43 0 0 56 38 1 0 42 47 52 109 -28 55 15 49 58 1 41 54 40 5 58 38 59 44 0 0 56 59 50 0 42 50 52 110 -28 55 38 3 58 23 3 55 2 29 59 0 8 45 0 0 57 21 4 0 42 53 52 112 -27 55 59 42 58 43 50 55 24 20 59 20 44 46 0 0 57 41 44 0 42 56 53 113 -27 56 20 48 59 4 4 55 45 36 59 40 45 47 0 0 58 1 51 0 43 0 53 115 -26 56 41 20 59 23 44 56 6 18 60 0 14 48 0 0 58 21 25 0 43 3 54 116 -25 57 1 19 59 42 52 56 26 28 60 19 9 49 0 0 58 40 26 0 43 6 54 118 -25 57 20 45 60 1 27 56 46 4 60 37 33 50 0 0 58 58 56 0 43 9 54 119 -24 57 39 39 60 19 31 57 5 9 60 55 25 51 0 0 59 16 54 0 43 12 54 121 -24 57 58 1 60 37 3 57 23 41 61 12 46 52 0 0 59 34 20 0 43 15 55 123 -23 58 15 52 60 54 5 57 41 43 61 29 36 53 0 0 59 51 17 0 43 18 55 124 -22 58 33 12 61 10 37 57 59 13 61 45 56 54 0 0 60 7 44 0 43 21 55 126 -22 58 50 2 61 26 39 58 16 13 62 1 47 55 0 0 60 23 41 0 43 24 56 128 -21 59 6 23 61 42 12 58 32 43 62 17 9 56 0 0 60 39 9 0 43 26 56 129 -21 59 22 14 61 57 16 58 48 44 62 32 3 57 0 0 60 54 9 0 43 29 56 131 -20 59 37 36 62 11 53 59 4 16 62 46 28 58 0 0 61 8 41 0 43 32 56 132 -20 59 52 30 62 26 1 59 19 20 63 0 27 59 0 0 61 22 46 0 43 35 56 134 -19 60 6 56 62 39 43 59 33 55 63 13 58 60 0 0 61 36 23 0 43 38 57 136 -19 60 20 55 62 52 59 59 48 3 63 27 4 61 0 0 61 49 34 0 43 40 57 137 -18 60 34 27 63 5 48 60 1 44 63 39 43 62 0 0 62 2 19 0 43 43 57 139 -18 60 47 32 63 18 12 60 14 58 63 51 57 63 0 0 62 14 39 0 43 46 57 141 -17 61 0 12 63 30 11 60 27 45 64 3 47 64 0 0 62 26 33 0 43 48 57 142 -17 61 12 25 63 41 45 60 40 7 64 15 11 65 0 0 62 38 2 0 43 51 57 144 -16 61 24 14 63 52 54 60 52 4 64 26 12 66 0 0 62 49 7 0 43 54 57 146 -16 61 35 37 64 3 40 61 3 36 64 36 49 67 0 0 62 59 49 0 43 56 57 147 -15 61 46 37 64 14 3 61 14 43 64 47 3 68 0 0 63 10 7 0 43 59 58 149 -15 61 57 12 64 24 2 61 25 25 64 56 55 69 0 0 63 20 1 0 44 1 58 151 -14 62 7 24 64 33 39 61 35 44 65 6 24 70 0 0 63 29 33 0 44 4 58 152 -14 62 17 12 64 42 54 61 45 40 65 15 31 71 0 0 63 38 43 0 44 6 58 154 -13 62 26 37 64 51 47 61 55 12 65 24 16 72 0 0 63 47 30 0 44 9 58 156 -13 62 35 40 65 0 19 62 4 21 65 32 41 73 0 0 63 55 56 0 44 11 58 157 -13 62 44 21 65 8 29 62 13 8 65 40 44 74 0 0 64 4 0 0 44 14 58 159 -12 62 52 39 65 16 18 62 21 33 65 48 26 75 0 0 64 11 43 0 44 16 58 161 -12 63 0 36 65 23 47 62 29 36 65 55 49 76 0 0 64 19 6 0 44 18 58 162 -11 63 8 12 65 30 56 62 37 17 66 2 51 77 0 0 64 26 8 0 44 21 58 164 -11 63 15 27 65 37 45 62 44 38 66 9 34 78 0 0 64 32 50 0 44 23 58 166 -10 63 22 21 65 44 14 62 51 37 66 15 57 79 0 0 64 39 11 0 44 26 58 167 -10 63 28 54 65 50 23 62 58 15 66 22 2 80 0 0 64 45 13 0 44 28 58 169 -10 63 35 7 65 56 14 63 4 33 66 27 47 81 0 0 64 50 56 0 44 30 58 171 -9 63 41 0 66 1 46 63 10 30 66 33 14 82 0 0 64 56 19 0 44 32 58 172 -9 63 46 33 66 6 58 63 16 8 66 38 22 83 0 0 65 1 23 0 44 35 58 174 -8 63 51 47 66 11 53 63 21 26 66 43 12 84 0 0 65 6 9 0 44 37 58 175 -8 63 56 41 66 16 29 63 26 24 66 47 44 85 0 0 65 10 35 0 44 39 58 177 -8 64 1 16 66 20 47 63 31 2 66 51 58 86 0 0 65 14 43 0 44 42 58 179 -7 64 5 32 66 24 47 63 35 21 66 55 54 87 0 0 65 18 33 0 44 44 58 180 -7 64 9 29 66 28 29 63 39 22 66 59 33 88 0 0 65 22 5 0 44 46 58 182 -7 64 13 8 66 31 54 63 43 3 67 2 55 89 0 0 65 25 18 0 44 48 58 183 -6 64 16 27 66 35 1 63 46 25 67 5 59 90 0 0 65 28 14 0 44 50 58 185 -6 64 19 29 66 37 51 63 49 29 67 8 47 91 0 0 65 30 52 0 44 53 57 187 -5 64 22 11 66 40 24 63 52 14 67 11 17 92 0 0 65 33 12 0 44 55 57 188 -5 64 24 36 66 42 40 63 54 40 67 13 31 93 0 0 65 35 15 0 44 57 57 190 -5 64 26 43 66 44 38 63 56 48 67 15 27 94 0 0 65 37 0 0 44 59 57 191 -4 64 28 31 66 46 20 63 58 38 67 17 7 95 0 0 65 38 27 0 45 1 57 193 -4 64 30 1 66 47 45 64 0 10 67 18 31 96 0 0 65 39 38 0 45 4 57 194 -3 64 31 14 66 48 53 64 1 23 67 19 38 97 0 0 65 40 31 0 45 6 57 196 -3 64 32 8 66 49 44 64 2 18 67 20 28 98 0 0 65 41 6 0 45 8 57 197 -3 64 32 45 66 50 18 64 2 56 67 21 2 99 0 0 65 41 24 0 45 10 57 199 -2 64 33 4 66 50 36 64 3 15 67 21 19 100 0 0 65 41 25 0 45 12 56 201 -2 64 33 5 66 50 37 64 3 16 67 21 20 101 0 0 65 41 9 0 45 14 56 202 -2 64 32 48 66 50 21 64 2 58 67 21 5 102 0 0 65 40 36 0 45 16 56 204 -1 64 32 13 66 49 49 64 2 23 67 20 33 103 0 0 65 39 45 0 45 19 56 205 -1 64 31 21 66 49 0 64 1 30 67 19 45 104 0 0 65 38 36 0 45 21 56 207 -1 64 30 10 66 47 54 64 0 19 67 18 40 105 0 0 65 37 11 0 45 23 56 208 0 64 28 42 66 46 31 63 58 49 67 17 18 Uncertainty in time = +/- 2 secs Prediction of 2012 Oct 26.0 Data for the target star ------------------------ * name: TYC 2488-00479-1 * constellation : Lynx * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 08 58 20.6872 DE: +33 11 42.148 * position source: mpos:TYC pm:TYC * standard error: RA,DE ["]: ( .025, .028 ) * V mag [mag]: 8.1 * B mag [mag]: 9.5 * Diameter [mas]: 1 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (13) Egeria approx. diameter [km]: 215 approx. diameter ["]: .135 distance from Earth [AU]: 2.19900 * orbital information: orbit source: Preston date of fit: 2012 Oct 25 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1369 number of rejected observations: 136 time covered by the observations: 1904 Nov 15 - 2012 Jan 20 1 sigma uncertainty ellipse (major, minor, PA): 0.015, 0.010, 104° remarks: * orbital elements for (13) Egeria : Mean anomaly = 343.07889047 deg Arg. of pericenter = 79.79848388 deg Long. of node = 43.26093349 deg Inclination = 16.54124136 deg Eccentricity = 0.08414090 Semimajor axis = 2.57678779 AU Perihelion dist = 2.35997455 AU Mag: H = 6.72, G = 0.15 Epoch of elements : MJD 56228.03100000 TDT (2012 Oct 28.031) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Oct 28 13 Egeria 0h 44.4m UT 8.1 8 58 20.687 33 11 42.15TYC 2488-00479-1 9.5 11.5 217 10.2 2.199 3.790 5.94 86.7168 33.194 164.86 -13.19 0.7397 -0.06769 0.52018 11.89769 1.48270 -0.00536 0.00169 2000 341.16527020121020.00000 79.798484 43.260933 16.5412410.08414090 2.5767878 2.3599745 6.7 5.00.15 RATE 2.3827920 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.030 0.029 2 1.22 0.030 0 1 2-2 056226.0020121028_0479-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Oct 25, 21:22 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org