IOTA/IOTA-ES occultation update for (369) Aeria / TYC 6971-00203-1 event on 2010 Nov 20, 05:51 UT Visible from Summary ------- On 2010 Nov 20 UT, the 60 km diameter asteroid (369) Aeria will occult a 10.4 mag star in the constellation Aquarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 2.8 mag to 13.1 mag (the magnitude of the asteroid) for at most 4.0 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: 75 * date and approx. time of event: 2010 Nov 20, 05:50 - 2010 Nov 20, 05:58 UT * magnitude of target star: 10.4 * magnitude drop [mag]: 2.8 * estimated maximum duration [s]: 4.0 * Moon: 98 % sunlit, 67° distance * Sun: 98° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 61 * 1 sigma uncertainty interval [path widths]: +/- 0.75 * 1 sigma uncertainty interval [seconds]: +/- 3.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .034 +/- .030) * 1 sigma uncertainty ellipse (major, minor, PA): ( .034", .029", 82° ) * approx speed of asteroid's shadow [km/s]: 15.0096 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6971-00203-1 by 369 Aeria on 2010 Nov 20 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 ' " Longitude Longitude Longitude Longitude -103 38 57 49 0 0 5 58 24 0 234 -59 ... .. .. -104 20 51 ... .. .. -105 22 58 -105 38 34 48 0 0 5 58 23 2 232 -60 -104 58 13 -106 18 34 -103 56 59 -107 17 55 -107 31 10 47 0 0 5 58 23 3 231 -60 -106 52 32 -108 9 29 -105 54 0 -109 6 25 -109 17 36 46 0 0 5 58 22 5 229 -61 -108 40 30 -109 54 27 -107 44 20 -110 49 13 -110 58 37 45 0 0 5 58 21 7 228 -61 -110 22 52 -111 34 8 -109 28 48 -112 26 59 -112 34 48 44 0 0 5 58 19 8 227 -61 -112 0 16 -113 9 8 -111 8 4 -114 0 16 -114 6 41 43 0 0 5 58 18 10 226 -61 -113 33 15 -114 39 57 -112 42 44 -115 29 30 -115 34 41 42 0 0 5 58 16 11 225 -61 -115 2 14 -116 6 58 -114 13 16 -116 55 7 -116 59 12 41 0 0 5 58 13 12 224 -61 -116 27 39 -117 30 36 -115 40 3 -118 17 26 -118 20 32 40 0 0 5 58 11 14 223 -60 -117 49 49 -118 51 7 -117 3 29 -119 36 47 -119 39 0 39 0 0 5 58 8 15 222 -60 -119 9 2 -120 8 50 -118 23 52 -120 53 24 -120 54 50 38 0 0 5 58 5 17 222 -60 -120 25 34 -121 23 59 -119 41 28 -122 7 33 -122 8 16 37 0 0 5 58 2 18 221 -59 -121 39 38 -122 36 48 -120 56 32 -123 19 26 -123 19 30 36 0 0 5 57 59 20 220 -59 -122 51 29 -123 47 27 -122 9 16 -124 29 13 -124 28 44 35 0 0 5 57 55 21 219 -58 -124 1 15 -124 56 8 -123 19 53 -125 37 7 -125 36 6 34 0 0 5 57 51 22 219 -58 -125 9 8 -126 3 1 -124 28 33 -126 43 15 -126 41 47 33 0 0 5 57 47 24 218 -57 -126 15 17 -127 8 13 -125 35 25 -127 47 46 -127 45 53 32 0 0 5 57 43 25 217 -57 -127 19 50 -128 11 54 -126 40 38 -128 50 48 -128 48 33 31 0 0 5 57 39 26 217 -56 -128 22 54 -129 14 9 -127 44 19 -129 52 28 -129 49 53 30 0 0 5 57 34 28 216 -55 -129 24 37 -130 15 7 -128 46 37 -130 52 53 -130 50 0 29 0 0 5 57 29 29 216 -54 -130 25 4 -131 14 52 -129 47 37 -131 52 7 -131 48 58 28 0 0 5 57 25 30 215 -54 -131 24 23 -132 13 32 -130 47 25 -132 50 18 -132 46 55 27 0 0 5 57 19 32 214 -53 -132 22 38 -133 11 10 -131 46 8 -133 47 30 -133 43 54 26 0 0 5 57 14 33 214 -52 -133 19 54 -134 7 53 -132 43 51 -134 43 47 -134 40 1 25 0 0 5 57 9 34 213 -51 -134 16 17 -135 3 44 -133 40 37 -135 39 15 -135 35 20 24 0 0 5 57 3 36 213 -50 -135 11 50 -135 58 48 -134 36 33 -136 33 58 -136 29 55 23 0 0 5 56 57 37 212 -49 -136 6 39 -136 53 9 -135 31 43 -137 28 0 -137 23 49 22 0 0 5 56 51 38 212 -48 -137 0 46 -137 46 52 -136 26 9 -138 21 24 -138 17 8 21 0 0 5 56 45 39 211 -47 -137 54 16 -138 39 59 -137 19 57 -139 14 14 -139 9 54 20 0 0 5 56 38 41 211 -46 -138 47 13 -139 32 34 -138 13 10 -140 6 34 -140 2 11 19 0 0 5 56 32 42 210 -45 -139 39 39 -140 24 42 -139 5 51 -140 58 27 -140 54 1 18 0 0 5 56 25 43 210 -44 -140 31 39 -141 16 24 -139 58 5 -141 49 56 -141 45 29 17 0 0 5 56 18 45 209 -43 -141 23 15 -142 7 44 -140 49 53 -142 41 5 -142 36 38 16 0 0 5 56 11 46 209 -42 -142 14 30 -142 58 45 -141 41 20 -143 31 55 -143 27 29 15 0 0 5 56 4 47 208 -41 -143 5 28 -143 49 30 -142 32 27 -144 22 31 -144 18 6 14 0 0 5 55 57 48 208 -40 -143 56 11 -144 40 2 -143 23 19 -145 12 55 -145 8 33 13 0 0 5 55 49 50 207 -39 -144 46 43 -145 30 23 -144 13 58 -146 3 10 -145 58 51 12 0 0 5 55 42 51 207 -38 -145 37 5 -146 20 37 -145 4 27 -146 53 18 -146 49 3 11 0 0 5 55 34 52 206 -37 -146 27 21 -147 10 47 -145 54 48 -147 43 23 -147 39 13 10 0 0 5 55 26 54 205 -36 -147 17 33 -148 0 54 -146 45 5 -148 33 26 -148 29 23 9 0 0 5 55 18 55 205 -35 -148 7 45 -148 51 1 -147 35 20 -149 23 31 -149 19 35 8 0 0 5 55 10 56 204 -34 -148 57 58 -149 41 12 -148 25 35 -150 13 41 -150 9 52 7 0 0 5 55 2 57 203 -33 -149 48 16 -150 31 29 -149 15 54 -151 3 57 -151 0 17 6 0 0 5 54 53 59 203 -31 -150 38 41 -151 21 54 -150 6 19 -151 54 23 -151 50 53 5 0 0 5 54 45 60 202 -30 -151 29 16 -152 12 31 -150 56 52 -152 45 2 -152 41 42 4 0 0 5 54 36 61 201 -29 -152 20 3 -153 3 23 -151 47 38 -153 35 56 -153 32 48 3 0 0 5 54 27 62 200 -28 -153 11 6 -153 54 31 -152 38 38 -154 27 8 -154 24 13 2 0 0 5 54 18 64 199 -27 -154 2 28 -154 45 59 -153 29 55 -155 18 42 -155 15 59 1 0 0 5 54 9 65 198 -26 -154 54 11 -155 37 50 -154 21 32 -156 10 40 -156 8 12 0 0 0 5 54 0 66 197 -24 -155 46 18 -156 30 7 -155 13 32 -157 3 4 -157 0 52 - 1 0 0 5 53 50 67 195 -23 -156 38 53 -157 22 54 -156 5 59 -157 56 0 Latitude Latitude Latitude Latitude -159 0 0 - 3 13 26 5 53 29 70 191 -20 - 3 38 2 - 2 48 47 - 4 14 51 - 2 11 43 -160 0 0 - 4 19 20 5 53 18 71 189 -19 - 4 43 46 - 3 54 51 - 5 20 20 - 3 18 2 -161 0 0 - 5 24 17 5 53 8 72 187 -18 - 5 48 33 - 4 59 59 - 6 24 51 - 4 23 26 -162 0 0 - 6 28 15 5 52 57 73 184 -16 - 6 52 20 - 6 4 7 - 7 28 22 - 5 27 50 -163 0 0 - 7 31 10 5 52 46 75 180 -15 - 7 55 4 - 7 7 13 - 8 30 50 - 6 31 13 -164 0 0 - 8 33 0 5 52 36 76 176 -14 - 8 56 43 - 8 9 15 - 9 32 12 - 7 33 31 -165 0 0 - 9 33 43 5 52 25 76 172 -12 - 9 57 15 - 9 10 9 -10 32 27 - 8 34 42 -166 0 0 -10 33 18 5 52 14 77 167 -11 -10 56 38 -10 9 55 -11 31 33 - 9 34 46 -167 0 0 -11 31 42 5 52 4 78 162 -10 -11 54 50 -11 8 30 -12 29 28 -10 33 39 -168 0 0 -12 28 54 5 51 54 78 156 -8 -12 51 51 -12 5 54 -13 26 11 -11 31 20 -169 0 0 -13 24 53 5 51 44 79 149 -7 -13 47 38 -13 2 6 -14 21 42 -12 27 49 -170 0 0 -14 19 39 5 51 34 79 143 -6 -14 42 13 -13 57 3 -15 15 58 -13 23 5 -171 0 0 -15 13 11 5 51 24 79 136 -4 -15 35 33 -14 50 47 -16 9 1 -14 17 6 -172 0 0 -16 5 28 5 51 14 79 130 -3 -16 27 38 -15 43 16 -17 0 49 -15 9 53 -173 0 0 -16 56 31 5 51 4 78 124 -2 -17 18 29 -16 34 30 -17 51 23 -16 1 24 -174 0 0 -17 46 18 5 50 55 78 118 -1 -18 8 5 -17 24 29 -18 40 42 -16 51 41 Uncertainty in time = +/- 3 secs Prediction of 2009 Apr 19.0 Data for the target star ------------------------ * name: TYC 6971-00203-1 * constellation : Aquarius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 22 56 23.8848 DE: -22 58 46.424 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .023, .026 ) * V mag [mag]: 10.4 * B mag [mag]: 11.3 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (369) Aeria approx. diameter [km]: 60 approx. diameter ["]: .041 distance from Earth [AU]: 2.03300 * orbital information: orbit source: Preston date of fit: 2009 Apr 19 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 715 number of rejected observations: 106 time covered by the observations: 1901 Apr 19 - 2009 Mar 27 1 sigma uncertainty ellipse (major, minor, PA): 0.025, 0.014, 75° remarks: * orbital elements for (369) Aeria : Mean anomaly = 358.26005642 deg Arg. of pericenter = 269.06525544 deg Long. of node = 94.33747513 deg Inclination = 12.70278794 deg Eccentricity = 0.09903874 Semimajor axis = 2.65033299 AU Perihelion dist = 2.38784735 AU Mag: H = 8.54, G = 0.15 Epoch of elements : MJD 55520.24400000 TDT (2010 Nov 20.244) ------ occelmnt file for Occult BEGIN ----------------------------------- 2010 Nov 20 369 Aeria 5h 51.4m UT 10.4 22 56 23.885-22 58 46.42TYC 6971-00203-1 11.3 13.1 60 4.0 2.033 1.914 25.39 -162.9086 -22.986 88.53 -19.67 5.8575 -0.13281 0.13734 6.10888 5.86971 0.00509 0.00243 2000 358.20431920101120.00000269.065255 94.337475 12.7027880.09903874 2.6503330 2.3878474 8.5 5.00.15 RATE 2.2843010 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.034 0.029 82 1.75 0.031 0 54940.0020101120_0203-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2009 Apr 19, 01:39 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org