IOTA/IOTA-ES occultation update for (2490) Bussolini / 2UCAC 35139206 event on 2008 Nov 04, 08:29 UT Visible from USA, Mexico, New Zealand Summary ------- On 2008 Nov 04 UT, the 12 km diameter asteroid (2490) Bussolini will occult a 5.2 mag star in the constellation Pisces for observers along a path across USA, Mexico, New Zealand. In the case of an occultation, the combined light of the asteroid and the star will drop by 9.7 mag to 14.9 mag (the magnitude of the asteroid) for at most 1.2 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: UCAC. The event at a glimpse ---------------------- * Rank: 7 * date and approx. time of event: 2008 Nov 04, 08:18 - 2008 Nov 04, 08:39 UT * midpoint of event [JD]: 2454774.85374583 * magnitude of target star: 5.2 * magnitude drop [mag]: 9.7 * estimated maximum duration [s]: 1.2 * Moon: 33 % sunlit, 91° distance * Sun: 161° distance * rough path description: USA, Mexico, New Zealand The occultation path -------------------- * approximate projected width [km]: 12 * 1 sigma uncertainty interval [path widths]: +/- 9.95 * 1 sigma uncertainty interval [seconds]: +/- 11.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .133 +/- .102) * 1 sigma uncertainty ellipse (major, minor, PA): ( .134", .102", 86° ) * approx speed of asteroid's shadow [km/s]: 9.6968 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of 2UCAC 35139206 by 2490 Bussolini on 2008 Nov 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 ' " Longitude Longitude Longitude Longitude Latitude Latitude Latitude Latitude 158 0 0 -52 20 41 8 39 47 15 51 -1 -52 16 36 -52 24 45 -50 55 36 -53 46 14 159 0 0 -51 53 24 8 39 44 16 50 -1 -51 49 17 -51 57 31 -50 27 38 -53 19 40 160 0 0 -51 25 12 8 39 42 17 49 -2 -51 21 3 -51 29 21 -49 58 43 -52 52 12 161 0 0 -50 56 4 8 39 39 17 49 -3 -50 51 53 -51 0 15 -49 28 52 -52 23 48 162 0 0 -50 25 58 8 39 36 18 48 -4 -50 21 45 -50 30 11 -48 58 3 -51 54 27 163 0 0 -49 54 54 8 39 33 19 47 -4 -49 50 39 -49 59 9 -48 26 14 -51 24 8 164 0 0 -49 22 49 8 39 30 20 46 -5 -49 18 32 -49 27 7 -47 53 24 -50 52 49 165 0 0 -48 49 43 8 39 26 21 46 -6 -48 45 23 -48 54 3 -47 19 33 -50 20 29 166 0 0 -48 15 34 8 39 23 22 45 -7 -48 11 12 -48 19 56 -46 44 38 -49 47 7 167 0 0 -47 40 21 8 39 19 23 44 -8 -47 35 57 -47 44 45 -46 8 39 -49 12 41 168 0 0 -47 4 2 8 39 15 23 43 -9 -46 59 36 -47 8 29 -45 31 34 -48 37 10 169 0 0 -46 26 37 8 39 11 24 42 -10 -46 22 8 -46 31 6 -44 53 22 -48 0 33 170 0 0 -45 48 4 8 39 6 25 42 -11 -45 43 33 -45 52 35 -44 14 3 -47 22 48 171 0 0 -45 8 22 8 39 1 26 41 -12 -45 3 49 -45 12 55 -43 33 34 -46 43 54 172 0 0 -44 27 30 8 38 56 27 40 -13 -44 22 55 -44 32 6 -42 51 56 -46 3 50 173 0 0 -43 45 27 8 38 51 28 40 -14 -43 40 49 -43 50 5 -42 9 6 -45 22 34 174 0 0 -43 2 12 8 38 45 29 39 -15 -42 57 32 -43 6 52 -41 25 5 -44 40 7 175 0 0 -42 17 45 8 38 39 30 38 -16 -42 13 2 -42 22 27 -40 39 52 -43 56 26 176 0 0 -41 32 4 8 38 33 31 37 -17 -41 27 19 -41 36 48 -39 53 26 -43 11 32 177 0 0 -40 45 9 8 38 26 32 37 -18 -40 40 22 -40 49 55 -39 5 46 -42 25 22 178 0 0 -39 56 59 8 38 19 33 36 -19 -39 52 11 -40 1 48 -38 16 53 -41 37 58 179 0 0 -39 7 35 8 38 12 35 35 -20 -39 2 45 -39 12 26 -37 26 47 -40 49 18 180 0 0 -38 16 57 8 38 5 36 35 -21 -38 12 4 -38 21 50 -36 35 26 -39 59 23 -179 0 0 -37 25 4 8 37 57 37 34 -22 -37 20 9 -37 29 58 -35 42 52 -39 8 12 -178 0 0 -36 31 56 8 37 48 38 33 -23 -36 26 59 -36 36 53 -34 49 5 -38 15 45 -177 0 0 -35 37 35 8 37 40 39 32 -24 -35 32 36 -35 42 33 -33 54 6 -37 22 3 -176 0 0 -34 42 0 8 37 31 40 32 -26 -34 37 0 -34 47 0 -32 57 55 -36 27 6 -175 0 0 -33 45 13 8 37 21 42 31 -27 -33 40 11 -33 50 15 -32 0 34 -35 30 55 -174 0 0 -32 47 15 8 37 12 43 30 -28 -32 42 12 -32 52 19 -31 2 3 -34 33 31 -173 0 0 -31 48 8 8 37 1 44 30 -29 -31 43 3 -31 53 13 -30 2 24 -33 34 55 -172 0 0 -30 47 53 8 36 51 45 29 -31 -30 42 46 -30 52 59 -29 1 40 -32 35 10 -171 0 0 -29 46 31 8 36 40 47 28 -32 -29 41 23 -29 51 39 -27 59 52 -31 34 16 -170 0 0 -28 44 6 8 36 29 48 27 -33 -28 38 57 -28 49 15 -26 57 1 -30 32 16 -169 0 0 -27 40 39 8 36 17 49 27 -35 -27 35 29 -27 45 49 -25 53 12 -29 29 12 -168 0 0 -26 36 13 8 36 5 51 26 -36 -26 31 2 -26 41 24 -24 48 26 -28 25 7 -167 0 0 -25 30 51 8 35 52 52 25 -37 -25 25 39 -25 36 3 -23 42 47 -27 20 3 -166 0 0 -24 24 37 8 35 39 53 24 -39 -24 19 24 -24 29 49 -22 36 18 -26 14 3 -165 0 0 -23 17 32 8 35 26 55 23 -40 -23 12 19 -23 22 46 -21 29 1 -25 7 12 -164 0 0 -22 9 42 8 35 12 56 23 -42 -22 4 29 -22 14 56 -20 21 1 -23 59 32 -163 0 0 -21 1 10 8 34 58 57 22 -43 -20 55 56 -21 6 24 -19 12 22 -22 51 7 -162 0 0 -19 52 0 8 34 44 59 21 -44 -19 46 46 -19 57 14 -18 3 7 -21 42 1 -161 0 0 -18 42 15 8 34 29 60 20 -46 -18 37 1 -18 47 29 -16 53 20 -20 32 18 -160 0 0 -17 32 0 8 34 15 62 19 -47 -17 26 46 -17 37 15 -15 43 6 -19 22 2 -159 0 0 -16 21 20 8 33 59 63 17 -49 -16 16 6 -16 26 34 -14 32 29 -18 11 18 -158 0 0 -15 10 18 8 33 44 64 16 -50 -15 5 5 -15 15 32 -13 21 33 -17 0 10 -157 0 0 -13 59 0 8 33 28 66 15 -52 -13 53 47 -14 4 13 -12 10 23 -15 48 43 -156 0 0 -12 47 29 8 33 12 67 13 -53 -12 42 17 -12 52 42 -10 59 3 -14 37 0 -155 0 0 -11 35 51 8 32 56 68 11 -55 -11 30 39 -11 41 3 - 9 47 37 -13 25 8 -154 0 0 -10 24 10 8 32 40 70 9 -56 -10 18 58 -10 29 21 - 8 36 11 -12 13 11 -153 0 0 - 9 12 29 8 32 23 71 7 -58 - 9 7 19 - 9 17 40 - 7 24 48 -11 1 12 -152 0 0 - 8 0 55 8 32 7 72 4 -59 - 7 55 46 - 8 6 5 - 6 13 34 - 9 49 17 -151 0 0 - 6 49 31 8 31 50 74 1 -61 - 6 44 23 - 6 54 40 - 5 2 31 - 8 37 30 -150 0 0 - 5 38 21 8 31 33 75 358 -62 - 5 33 14 - 5 43 29 - 3 51 45 - 7 25 56 -149 0 0 - 4 27 31 8 31 16 76 354 -64 - 4 22 25 - 4 32 37 - 2 41 20 - 6 14 38 -148 0 0 - 3 17 2 8 30 59 77 350 -65 - 3 11 58 - 3 22 7 - 1 31 19 - 5 3 41 -147 0 0 - 2 7 1 8 30 43 78 344 -67 - 2 1 58 - 2 12 5 - 0 21 46 - 3 53 10 -146 0 0 - 0 57 30 8 30 26 79 338 -68 - 0 52 28 - 1 2 32 0 47 14 - 2 43 7 -145 0 0 0 11 27 8 30 9 79 331 -70 0 16 27 0 6 26 1 55 39 - 1 33 37 -144 0 0 1 19 46 8 29 52 80 324 -71 1 24 45 1 14 47 3 3 25 - 0 24 44 -143 0 0 2 27 24 8 29 35 80 316 -73 2 32 21 2 22 27 4 10 29 0 43 31 -142 0 0 3 34 19 8 29 19 80 308 -74 3 39 14 3 29 24 5 16 49 1 51 2 -141 0 0 4 40 27 8 29 2 80 300 -76 4 45 21 4 35 34 6 22 20 2 57 48 -140 0 0 5 45 46 8 28 46 80 292 -77 5 50 37 5 40 54 7 27 1 4 3 46 -139 0 0 6 50 12 8 28 30 79 285 -78 6 55 2 6 45 23 8 30 49 5 8 52 -138 0 0 7 53 45 8 28 14 78 279 -80 7 58 33 7 48 57 9 33 43 6 13 5 -137 0 0 8 56 21 8 27 58 77 274 -81 9 1 7 8 51 35 10 35 39 7 16 22 -136 0 0 9 58 0 8 27 42 77 270 -83 10 2 44 9 53 16 11 36 37 8 18 42 -135 0 0 10 58 38 8 27 27 76 266 -84 11 3 20 10 53 56 12 36 35 9 20 3 -134 0 0 11 58 15 8 27 12 75 263 -85 12 2 55 11 53 35 13 35 31 10 20 23 -133 0 0 12 56 50 8 26 57 74 260 -86 13 1 28 12 52 12 14 33 24 11 19 40 -132 0 0 13 54 21 8 26 42 73 258 -88 13 58 57 13 49 45 15 30 12 12 17 54 -131 0 0 14 50 47 8 26 28 71 256 -89 14 55 21 14 46 13 16 25 57 13 15 3 -130 0 0 15 46 8 8 26 13 70 254 -89 15 50 40 15 41 36 17 20 35 14 11 7 -129 0 0 16 40 22 8 25 59 69 253 -88 16 44 52 16 35 52 18 14 7 15 6 5 -128 0 0 17 33 30 8 25 46 68 252 -87 17 37 58 17 29 2 19 6 33 15 59 56 -127 0 0 18 25 31 8 25 32 67 251 -85 18 29 57 18 21 5 19 57 51 16 52 40 -126 0 0 19 16 24 8 25 19 66 250 -84 19 20 48 19 12 1 20 48 3 17 44 16 -125 0 0 20 6 10 8 25 6 65 249 -83 20 10 32 20 1 49 21 37 7 18 34 45 -124 0 0 20 54 49 8 24 54 64 249 -82 20 59 9 20 50 29 22 25 4 19 24 6 -123 0 0 21 42 20 8 24 42 62 248 -81 21 46 38 21 38 2 23 11 53 20 12 19 -122 0 0 22 28 44 8 24 29 61 248 -80 22 33 0 22 24 29 23 57 36 20 59 25 -121 0 0 23 14 2 8 24 18 60 248 -78 23 18 15 23 9 48 24 42 13 21 45 23 -120 0 0 23 58 12 8 24 6 59 247 -77 24 2 24 23 54 0 25 25 44 22 30 15 -119 0 0 24 41 17 8 23 55 58 247 -76 24 45 27 24 37 7 26 8 8 23 14 0 -118 0 0 25 23 16 8 23 44 57 247 -75 25 27 24 25 19 8 26 49 28 23 56 39 -117 0 0 26 4 10 8 23 34 56 247 -74 26 8 17 26 0 4 27 29 44 24 38 13 -116 0 0 26 44 0 8 23 23 55 247 -73 26 48 4 26 39 56 28 8 55 25 18 41 -115 0 0 27 22 46 8 23 13 54 247 -72 27 26 49 27 18 44 28 47 4 25 58 6 -114 0 0 28 0 29 8 23 3 53 247 -71 28 4 30 27 56 29 29 24 10 26 36 26 -113 0 0 28 37 10 8 22 54 52 247 -70 28 41 9 28 33 11 30 0 14 27 13 44 -112 0 0 29 12 50 8 22 44 51 248 -69 29 16 47 29 8 52 30 35 18 27 50 0 -111 0 0 29 47 28 8 22 35 50 248 -68 29 51 24 29 43 33 31 9 21 28 25 14 -110 0 0 30 21 7 8 22 26 49 248 -67 30 25 1 30 17 13 31 42 26 28 59 28 -109 0 0 30 53 47 8 22 18 48 248 -66 30 57 39 30 49 55 32 14 32 29 32 41 -108 0 0 31 25 28 8 22 9 47 249 -65 31 29 19 31 21 38 32 45 40 30 4 56 -107 0 0 31 56 13 8 22 1 46 249 -64 32 0 2 31 52 23 33 15 52 30 36 13 -106 0 0 32 26 0 8 21 53 45 249 -63 32 29 48 32 22 13 33 45 8 31 6 33 -105 0 0 32 54 52 8 21 45 44 250 -62 32 58 38 32 51 6 34 13 29 31 35 56 -104 0 0 33 22 49 8 21 38 43 250 -61 33 26 34 33 19 5 34 40 56 32 4 23 -103 0 0 33 49 52 8 21 31 42 250 -60 33 53 36 33 46 9 35 7 30 32 31 56 -102 0 0 34 16 2 8 21 24 41 251 -59 34 19 44 34 12 20 35 33 11 32 58 35 -101 0 0 34 41 20 8 21 17 40 251 -58 34 45 0 34 37 39 35 58 1 33 24 20 -100 0 0 35 5 46 8 21 10 40 252 -57 35 9 25 35 2 7 36 22 0 33 49 14 - 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69 0 0 41 36 27 8 18 59 15 270 -33 41 39 45 41 33 10 42 45 9 40 27 31 - 68 0 0 41 38 33 8 18 57 14 270 -32 41 41 51 41 35 16 42 47 13 40 29 39 - 67 0 0 41 40 2 8 18 55 14 271 -31 41 43 20 41 36 45 42 48 40 40 31 9 - 66 0 0 41 40 54 8 18 53 13 272 -30 41 44 12 41 37 37 42 49 32 40 32 2 - 65 0 0 41 41 10 8 18 51 12 272 -30 41 44 27 41 37 53 42 49 47 40 32 18 - 64 0 0 41 40 49 8 18 49 11 273 -29 41 44 6 41 37 31 42 49 26 40 31 56 - 63 0 0 41 39 50 8 18 48 11 274 -28 41 43 8 41 36 33 42 48 30 40 30 56 - 62 0 0 41 38 15 8 18 46 10 274 -27 41 41 33 41 34 57 42 46 57 40 29 18 - 61 0 0 41 36 3 8 18 45 9 275 -27 41 39 20 41 32 45 42 44 48 40 27 3 - 60 0 0 41 33 13 8 18 44 8 275 -26 41 36 31 41 29 55 42 42 2 40 24 9 - 59 0 0 41 29 46 8 18 42 8 276 -25 41 33 4 41 26 28 42 38 40 40 20 37 - 58 0 0 41 25 42 8 18 41 7 277 -24 41 29 0 41 22 23 42 34 41 40 16 27 - 57 0 0 41 20 59 8 18 40 6 277 -24 41 24 18 41 17 40 42 30 4 40 11 38 - 56 0 0 41 15 38 8 18 39 5 278 -23 41 18 57 41 12 19 42 24 51 40 6 10 - 55 0 0 41 9 39 8 18 39 5 279 -22 41 12 59 41 6 20 42 19 0 40 0 3 - 54 0 0 41 3 1 8 18 38 4 279 -21 41 6 21 40 59 42 42 12 31 39 53 16 - 53 0 0 40 55 45 8 18 37 3 280 -21 40 59 5 40 52 24 42 5 23 39 45 49 - 52 0 0 40 47 48 8 18 37 2 281 -20 40 51 9 40 44 27 41 57 37 39 37 42 - 51 0 0 40 39 12 8 18 37 1 281 -19 40 42 33 40 35 50 .. .. .. 39 28 54 - 50 0 0 40 29 55 8 18 37 1 282 -18 40 33 17 40 26 33 .. .. .. 39 19 25 Uncertainty in time = +/- 13 secs [Prediction of 2008 Oct 1.0] Data for the target star ------------------------ * name: 2UCAC 35139206 * constellation : Pisces * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 01 24 47.7621 DE: +09 32 20.053 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .097, .087 ) * V mag [mag]: 5.2 * B mag [mag]: 0.0 * Apparent position with proper motion RA(deg): 21.3229526598 DE(deg): 9.5885675765 * Equation of equinoxes (radians) : 0.000048246145531 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2490) Bussolini approx. diameter [km]: 12 approx. diameter ["]: .012 distance from Earth [AU]: 1.34600 * orbital information: orbit source: Preston date of fit: 2008 Sep 30 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 529 number of rejected observations: 10 time covered by the observations: 1949 Nov 23 - 2008 Sep 02 1 sigma uncertainty ellipse (major, minor, PA): 0.092, 0.053, 81° remarks: * orbital elements for (2490) Bussolini : Mean anomaly = 335.09912646 deg Arg. of pericenter = 210.85223378 deg Long. of node = 212.68580400 deg Inclination = 12.96533577 deg Eccentricity = 0.13211403 Semimajor axis = 2.60914546 AU Perihelion dist = 2.26444074 AU Mag: H = 11.78, G = 0.15 Epoch of elements : MJD 54774.35400000 TDT (2008 Nov 04.354) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Nov 4 2490 Bussolini 8h 29.4m UT 5.2 1 24 47.762 9 32 20.052UCAC 35139206 0.0 14.9 12 1.2 1.346 -1.527 -27.70 -150.1091 9.546 48.55 -15.53 8.4899 0.13356 -0.10943 -3.45885 -4.24167 0.00176 0.00064 2000 334.08089820081031.00000210.852234212.685804 12.9653360.13211403 2.6091455 2.264440711.9 5.00.15 RATE 2.3386040 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.134 0.102 86 10.95 0.119 0 54740.5020081104_139206 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Oct 01, 23:34 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org