IOTA/IOTA-ES occultation update for (1527) Malmquista / TYC 0004-00331-1 event on 2012 Dec 05, 11:12 UT Visible from New Guinea, N Australia Summary ------- On 2012 Dec 05 UT, the 12 km diameter asteroid (1527) Malmquista will occult a 10.1 mag star in the constellation Pisces for observers along a path across New Guinea, N Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 5.6 mag to 15.7 mag (the magnitude of the asteroid) for at most 1.1 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: 25 * date and approx. time of event: 2012 Dec 05, 11:08 - 2012 Dec 05, 11:20 UT * geocentric midpoint of event [JD]: 2456266.966525 * magnitude of target star: 10.1 * magnitude drop [mag]: 5.6 * estimated maximum duration [s]: 1.1 * Moon: 62 % sunlit, 146° distance * Sun: 110° distance * rough path description: New Guinea, N Australia The occultation path -------------------- * approximate projected width [km]: 13 * 1 sigma uncertainty interval [path widths]: +/- 2.68 * 1 sigma uncertainty interval [seconds]: +/- 3.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .035 +/- .029) * 1 sigma uncertainty ellipse (major, minor, PA): ( .036", .029", 79° ) * approx speed of asteroid's shadow [km/s]: 11.0227 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0004-00331-1 by 1527 Malmquista on 2012 Dec 5 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 112 0 0 -25 0 55 11 8 23 61 18 0 -25 5 3 -24 56 47 -25 27 13 -24 34 42 113 0 0 -24 24 37 11 8 34 62 16 -1 -24 28 45 -24 20 29 -24 50 56 -23 58 23 114 0 0 -23 48 5 11 8 45 63 14 -3 -23 52 13 -23 43 57 -24 14 25 -23 21 50 115 0 0 -23 11 20 11 8 56 63 12 -4 -23 15 28 -23 7 12 -23 37 40 -22 45 4 116 0 0 -22 34 23 11 9 7 64 10 -5 -22 38 31 -22 30 15 -23 0 44 -22 8 6 117 0 0 -21 57 15 11 9 18 65 8 -6 -22 1 24 -21 53 7 -22 23 37 -21 30 59 118 0 0 -21 19 59 11 9 29 66 6 -7 -21 24 7 -21 15 51 -21 46 20 -20 53 42 119 0 0 -20 42 35 11 9 40 66 3 -8 -20 46 43 -20 38 26 -21 8 56 -20 16 18 120 0 0 -20 5 4 11 9 52 67 1 -9 -20 9 12 -20 0 56 -20 31 25 -19 38 48 121 0 0 -19 27 28 11 10 3 68 358 -11 -19 31 36 -19 23 20 -19 53 49 -19 1 13 122 0 0 -18 49 49 11 10 15 68 355 -12 -18 53 57 -18 45 41 -19 16 8 -18 23 35 123 0 0 -18 12 8 11 10 27 69 352 -13 -18 16 16 -18 8 0 -18 38 26 -17 45 55 124 0 0 -17 34 26 11 10 38 69 349 -14 -17 38 33 -17 30 18 -18 0 43 -17 8 14 125 0 0 -16 56 44 11 10 50 70 346 -15 -17 0 52 -16 52 37 -17 23 0 -16 30 34 126 0 0 -16 19 5 11 11 2 70 342 -16 -16 23 12 -16 14 58 -16 45 19 -15 52 57 127 0 0 -15 41 30 11 11 14 70 339 -18 -15 45 37 -15 37 23 -16 7 41 -15 15 24 128 0 0 -15 3 59 11 11 26 70 335 -19 -15 8 6 -14 59 53 -15 30 8 -14 37 55 129 0 0 -14 26 36 11 11 38 70 332 -20 -14 30 42 -14 22 30 -14 52 42 -14 0 34 130 0 0 -13 49 20 11 11 50 70 328 -21 -13 53 25 -13 45 14 -14 15 23 -13 23 21 131 0 0 -13 12 13 11 12 2 70 325 -22 -13 16 18 -13 8 8 -13 38 14 -12 46 17 132 0 0 -12 35 17 11 12 14 70 321 -24 -12 39 22 -12 31 13 -13 1 15 -12 9 24 133 0 0 -11 58 33 11 12 26 70 318 -25 -12 2 37 -11 54 29 -12 24 28 -11 32 43 134 0 0 -11 22 3 11 12 38 70 314 -26 -11 26 6 -11 17 59 -11 47 54 -10 56 16 135 0 0 -10 45 47 11 12 50 69 311 -27 -10 49 50 -10 41 44 -11 11 34 -10 20 4 136 0 0 -10 9 47 11 13 2 69 308 -28 -10 13 49 -10 5 45 -10 35 31 - 9 44 8 137 0 0 - 9 34 4 11 13 14 68 305 -30 - 9 38 6 - 9 30 3 - 9 59 44 - 9 8 29 138 0 0 - 8 58 40 11 13 26 68 302 -31 - 9 2 41 - 8 54 39 - 9 24 16 - 8 33 9 139 0 0 - 8 23 36 11 13 38 67 299 -32 - 8 27 36 - 8 19 35 - 8 49 7 - 7 58 9 140 0 0 - 7 48 52 11 13 49 67 297 -33 - 7 52 52 - 7 44 52 - 8 14 19 - 7 23 29 141 0 0 - 7 14 30 11 14 1 66 294 -34 - 7 18 29 - 7 10 31 - 7 39 53 - 6 49 11 142 0 0 - 6 40 30 11 14 13 65 292 -35 - 6 44 29 - 6 36 32 - 7 5 49 - 6 15 16 143 0 0 - 6 6 55 11 14 24 65 290 -37 - 6 10 53 - 6 2 57 - 6 32 9 - 5 41 45 144 0 0 - 5 33 44 11 14 35 64 288 -38 - 5 37 41 - 5 29 47 - 5 58 54 - 5 8 39 145 0 0 - 5 0 59 11 14 47 63 287 -39 - 5 4 56 - 4 57 3 - 5 26 4 - 4 35 59 146 0 0 - 4 28 41 11 14 58 62 285 -40 - 4 32 36 - 4 24 45 - 4 53 41 - 4 3 45 147 0 0 - 3 56 50 11 15 9 61 284 -41 - 4 0 45 - 3 52 55 - 4 21 45 - 3 31 59 148 0 0 - 3 25 27 11 15 20 60 282 -42 - 3 29 21 - 3 21 33 - 3 50 17 - 3 0 41 149 0 0 - 2 54 33 11 15 30 59 281 -44 - 2 58 26 - 2 50 40 - 3 19 18 - 2 29 52 150 0 0 - 2 24 8 11 15 41 58 280 -45 - 2 28 1 - 2 20 16 - 2 48 49 - 1 59 32 151 0 0 - 1 54 14 11 15 52 57 279 -46 - 1 58 6 - 1 50 23 - 2 18 49 - 1 29 43 152 0 0 - 1 24 51 11 16 2 56 278 -47 - 1 28 42 - 1 21 0 - 1 49 21 - 1 0 25 153 0 0 - 0 55 59 11 16 12 55 277 -48 - 0 59 49 - 0 52 9 - 1 20 24 - 0 31 37 154 0 0 - 0 27 38 11 16 22 55 276 -49 - 0 31 28 - 0 23 49 - 0 51 59 - 0 3 22 155 0 0 0 0 9 11 16 32 54 275 -50 - 0 3 39 0 3 58 - 0 24 6 0 24 21 156 0 0 0 27 24 11 16 42 53 274 -51 0 23 37 0 31 12 0 3 14 0 51 31 157 0 0 0 54 6 11 16 51 52 274 -53 0 50 19 0 57 53 0 30 0 1 18 8 158 0 0 1 20 14 11 17 1 50 273 -54 1 16 28 1 24 1 0 56 13 1 44 11 159 0 0 1 45 49 11 17 10 49 273 -55 1 42 3 1 49 34 1 21 53 2 9 41 160 0 0 2 10 49 11 17 19 48 272 -56 2 7 4 2 14 33 1 46 57 2 34 36 161 0 0 2 35 14 11 17 28 47 272 -57 2 31 30 2 38 58 2 11 28 2 58 57 162 0 0 2 59 5 11 17 36 46 271 -58 2 55 22 3 2 49 2 35 23 3 22 43 163 0 0 3 22 21 11 17 45 45 271 -59 3 18 39 3 26 4 2 58 44 3 45 55 164 0 0 3 45 2 11 17 53 44 271 -60 3 41 20 3 48 44 3 21 29 4 8 31 165 0 0 4 7 8 11 18 1 43 270 -61 4 3 26 4 10 49 3 43 39 4 30 32 166 0 0 4 28 38 11 18 9 42 270 -62 4 24 57 4 32 18 4 5 14 4 51 58 167 0 0 4 49 32 11 18 17 41 270 -63 4 45 53 4 53 12 4 26 13 5 12 49 168 0 0 5 9 51 11 18 24 40 270 -64 5 6 12 5 13 31 4 46 36 5 33 3 169 0 0 5 29 35 11 18 32 39 269 -65 5 25 56 5 33 13 5 6 23 5 52 43 170 0 0 5 48 42 11 18 39 38 269 -66 5 45 4 5 52 20 5 25 35 6 11 46 171 0 0 6 7 14 11 18 46 37 269 -67 6 3 37 6 10 51 5 44 10 6 30 14 172 0 0 6 25 10 11 18 53 36 269 -68 6 21 33 6 28 47 6 2 10 6 48 6 173 0 0 6 42 30 11 18 59 35 269 -69 6 38 54 6 46 6 6 19 34 7 5 23 174 0 0 6 59 14 11 19 6 34 269 -69 6 55 39 7 2 50 6 36 22 7 22 3 175 0 0 7 15 23 11 19 12 33 269 -70 7 11 48 7 18 58 6 52 34 7 38 9 176 0 0 7 30 56 11 19 18 32 269 -71 7 27 21 7 34 30 7 8 10 7 53 38 177 0 0 7 45 53 11 19 24 31 269 -72 7 42 19 7 49 27 7 23 10 8 8 32 178 0 0 8 0 14 11 19 30 30 269 -73 7 56 41 8 3 47 7 37 35 8 22 50 179 0 0 8 14 0 11 19 35 29 269 -73 8 10 27 8 17 33 7 51 24 8 36 33 180 0 0 8 27 10 11 19 40 28 269 -74 8 23 37 8 30 42 8 4 37 8 49 40 -179 0 0 8 39 45 11 19 46 27 269 -75 8 36 12 8 43 17 8 17 14 9 2 12 -178 0 0 8 51 44 11 19 50 26 269 -75 8 48 12 8 55 15 8 29 16 9 14 8 -177 0 0 9 3 8 11 19 55 25 269 -76 8 59 36 9 6 39 8 40 42 9 25 29 -176 0 0 9 13 56 11 20 0 24 269 -76 9 10 25 9 17 27 8 51 34 9 36 16 -175 0 0 9 24 10 11 20 4 23 269 -77 9 20 39 9 27 40 9 1 49 9 46 27 -174 0 0 9 33 48 11 20 8 22 269 -77 9 30 18 9 37 18 9 11 30 9 56 3 -173 0 0 9 42 51 11 20 12 21 270 -77 9 39 21 9 46 21 9 20 35 10 5 4 -172 0 0 9 51 20 11 20 16 20 270 -77 9 47 50 9 54 49 9 29 6 10 13 30 -171 0 0 9 59 13 11 20 19 19 270 -77 9 55 44 10 2 42 9 37 1 10 21 22 -170 0 0 10 6 32 11 20 23 18 270 -77 10 3 3 10 10 1 9 44 21 10 28 39 -169 0 0 10 13 16 11 20 26 17 270 -77 10 9 47 10 16 45 9 51 7 10 35 22 -168 0 0 10 19 26 11 20 29 16 270 -77 10 15 57 10 22 54 9 57 18 10 41 30 -167 0 0 10 25 1 11 20 32 15 270 -77 10 21 33 10 28 29 10 2 55 10 47 4 -166 0 0 10 30 2 11 20 35 14 271 -76 10 26 34 10 33 30 10 7 57 10 52 3 -165 0 0 10 34 28 11 20 37 13 271 -76 10 31 0 10 37 56 10 12 25 10 56 29 -164 0 0 10 38 21 11 20 39 12 271 -76 10 34 53 10 41 48 10 16 18 11 0 20 -163 0 0 10 41 39 11 20 42 11 271 -75 10 38 12 10 45 7 10 19 37 11 3 38 -162 0 0 10 44 23 11 20 43 10 271 -75 10 40 56 10 47 51 10 22 23 11 6 21 -161 0 0 10 46 34 11 20 45 9 271 -74 10 43 6 10 50 1 10 24 34 11 8 31 -160 0 0 10 48 10 11 20 47 8 272 -73 10 44 43 10 51 38 10 26 11 11 10 7 -159 0 0 10 49 13 11 20 48 7 272 -73 10 45 46 10 52 40 10 27 14 11 11 10 -158 0 0 10 49 42 11 20 49 6 272 -72 10 46 15 10 53 10 10 27 43 11 11 39 -157 0 0 10 49 38 11 20 50 5 272 -71 10 46 11 10 53 5 10 27 39 11 11 34 -156 0 0 10 49 0 11 20 51 4 272 -70 10 45 33 10 52 27 10 27 1 11 10 56 -155 0 0 10 47 49 11 20 52 3 272 -70 10 44 22 10 51 16 10 25 50 11 9 45 -154 0 0 10 46 4 11 20 52 2 273 -69 10 42 37 10 49 31 10 24 5 .. .. .. -153 0 0 10 43 46 11 20 53 1 273 -68 10 40 19 10 47 13 10 21 46 .. .. .. -152 0 0 10 40 55 11 20 53 0 273 -67 10 37 27 10 44 22 10 18 55 .. .. .. Uncertainty in time = +/- 3 secs Prediction of 2012 Dec 3.0 Data for the target star ------------------------ * name: TYC 0004-00331-1 * constellation : Pisces * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 00 08 57.9855 DE: +02 56 42.001 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .029, .024 ) * V mag [mag]: 10.1 * B mag [mag]: 10.3 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1527) Malmquista approx. diameter [km]: 12 approx. diameter ["]: .011 distance from Earth [AU]: 1.44800 * orbital information: orbit source: Preston date of fit: 2012 Nov 29 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1163 number of rejected observations: 33 time covered by the observations: 1929 Oct 09 - 2012 Nov 29 1 sigma uncertainty ellipse (major, minor, PA): 0.021, 0.016, 58° remarks: * orbital elements for (1527) Malmquista : Mean anomaly = 50.10667787 deg Arg. of pericenter = 304.32621234 deg Long. of node = 16.25274887 deg Inclination = 5.19406141 deg Eccentricity = 0.19727866 Semimajor axis = 2.22764192 AU Perihelion dist = 1.78817570 AU Mag: H = 11.93, G = 0.15 Epoch of elements : MJD 56266.46700000 TDT (2012 Dec 05.467) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Dec 5 1527 Malmquista 11h 11.8m UT 10.1 0 8 57.986 2 56 42.00TYC 0004-00331-1 10.3 15.7 12 1.1 1.448 2.181 19.01 119.6347 2.939 9.75 -22.45 11.1966 0.16862 -0.28937 5.37752 3.12885 0.00473 0.00199 2000 48.18960420121129.00000304.326212 16.252749 5.1940610.19727866 2.2276419 1.788175712.2 5.00.15 RATE 2.9643950 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.036 0.029 79 3.68 0.031 0 0-5 1 456264.0020121205_0331-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Nov 29, 22:37 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org