IOTA/IOTA-ES occultation update for (246) Asporina / TYC 0701-00962-1 event on 2008 Mar 03, 03:21 UT Visible from Mexico, Caribbean Summary ------- On 2008 Mar 03 UT, the 60 km diameter asteroid (246) Asporina will occult a 11.4 mag star in the constellation Orion for observers along a path across Mexico, Caribbean. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.7 mag to 14.0 mag (the magnitude of the asteroid) for at most 4.7 seconds. This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Alice Monet, TMO astrometry for the asteroid kindly provided by Bill Owen, historical astrometry from the MPC files (via AstDys), and the following catalogs for the star position: UCAC. The event at a glimpse ---------------------- * Rank: 49 * date and approx. time of event: 2008 Mar 03, 03:18 - 2008 Mar 03, 03:29 UT * magnitude of target star: 11.4 * magnitude drop [mag]: 2.7 * estimated maximum duration [s]: 4.7 * Moon: 22 % sunlit, 150° distance * Sun: 100° distance * rough path description: Mexico, Caribbean The occultation path -------------------- * approximate projected width [km]: 62 * 1 sigma uncertainty interval [path widths]: +/- 1.32 * 1 sigma uncertainty interval [seconds]: +/- 6.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .041 +/- .043) * 1 sigma uncertainty ellipse (major, minor, PA): ( .043", .041", 360° ) * approx speed of asteroid's shadow [km/s]: 12.8471 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0701-00962-1 by 246 Asporina on 2008 Mar 3 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 -134 0 0 -19 54 1 3 18 10 62 13 0 -20 19 25 -19 28 40 -21 26 49 -18 22 6 -133 0 0 -18 49 29 3 18 21 63 12 -1 -19 14 53 -18 24 9 -20 22 17 -17 17 35 -132 0 0 -17 44 36 3 18 33 64 10 -2 -18 9 59 -17 19 17 -19 17 21 -16 12 46 -131 0 0 -16 39 27 3 18 45 65 8 -4 -17 4 48 -16 14 9 -18 12 6 -15 7 42 -130 0 0 -15 34 5 3 18 57 66 5 -5 -15 59 24 -15 8 49 -17 6 36 -14 2 28 -129 0 0 -14 28 35 3 19 9 68 3 -6 -14 53 52 -14 3 23 -16 0 56 -12 57 9 -128 0 0 -13 23 2 3 19 22 69 0 -7 -13 48 16 -12 57 54 -14 55 11 -11 51 49 -127 0 0 -12 17 31 3 19 34 70 357 -8 -12 42 40 -11 52 26 -13 49 24 -10 46 32 -126 0 0 -11 12 6 3 19 47 71 354 -9 -11 37 10 -10 47 6 -12 43 42 - 9 41 24 -125 0 0 -10 6 51 3 19 59 72 350 -11 -10 31 50 - 9 41 56 -11 38 8 - 8 36 29 -124 0 0 - 9 1 51 3 20 12 73 346 -12 - 9 26 44 - 8 37 2 -10 32 46 - 7 31 50 -123 0 0 - 7 57 11 3 20 25 73 342 -13 - 8 21 58 - 7 32 28 - 9 27 42 - 6 27 33 -122 0 0 - 6 52 54 3 20 38 74 337 -14 - 7 17 34 - 6 28 18 - 8 23 0 - 5 23 41 -121 0 0 - 5 49 5 3 20 51 74 332 -15 - 6 13 37 - 5 24 36 - 7 18 43 - 4 20 18 -120 0 0 - 4 45 47 3 21 4 75 327 -17 - 5 10 11 - 4 21 26 - 6 14 57 - 3 17 28 -119 0 0 - 3 43 4 3 21 16 75 321 -18 - 4 7 20 - 3 18 52 - 5 11 44 - 2 15 15 -118 0 0 - 2 41 0 3 21 29 75 315 -19 - 3 5 7 - 2 16 56 - 4 9 8 - 1 13 42 -117 0 0 - 1 39 38 3 21 42 75 310 -20 - 2 3 36 - 1 15 43 - 3 7 13 - 0 12 52 -116 0 0 - 0 39 1 3 21 54 75 305 -21 - 1 2 50 - 0 15 15 - 2 6 2 0 47 12 -115 0 0 0 20 48 3 22 7 74 299 -22 - 0 2 51 0 44 25 - 1 5 38 1 46 26 -114 0 0 1 19 47 3 22 19 74 295 -24 0 56 17 1 43 14 - 0 6 4 2 44 50 -113 0 0 2 17 53 3 22 31 73 290 -25 1 54 33 2 41 9 0 52 38 3 42 20 -112 0 0 3 15 3 3 22 44 73 286 -26 2 51 53 3 38 10 1 50 26 4 38 54 -111 0 0 4 11 17 3 22 56 72 283 -27 3 48 17 4 34 13 2 47 17 5 34 31 -110 0 0 5 6 32 3 23 7 71 280 -28 4 43 42 5 29 18 3 43 10 6 29 9 -109 0 0 6 0 46 3 23 19 70 277 -29 5 38 7 6 23 22 4 38 3 7 22 46 -108 0 0 6 53 59 3 23 30 69 274 -30 6 31 30 7 16 24 5 31 54 8 15 21 -107 0 0 7 46 9 3 23 42 68 272 -31 7 23 51 8 8 24 6 24 43 9 6 53 -106 0 0 8 37 15 3 23 53 67 270 -33 8 15 8 8 59 20 7 16 27 9 57 22 -105 0 0 9 27 17 3 24 4 66 268 -34 9 5 20 9 49 12 8 7 8 10 46 47 -104 0 0 10 16 15 3 24 14 65 267 -35 9 54 28 10 37 58 8 56 43 11 35 6 -103 0 0 11 4 6 3 24 25 64 265 -36 10 42 30 11 25 40 9 45 13 12 22 21 -102 0 0 11 50 52 3 24 35 63 264 -37 11 29 26 12 12 15 10 32 36 13 8 30 -101 0 0 12 36 32 3 24 45 62 263 -38 12 15 16 12 57 45 11 18 53 13 53 33 -100 0 0 13 21 6 3 24 55 61 262 -39 13 0 0 13 42 9 12 4 4 14 37 31 - 99 0 0 14 4 34 3 25 5 60 262 -40 13 43 38 14 25 28 12 48 9 15 20 24 - 98 0 0 14 46 57 3 25 14 58 261 -41 14 26 11 15 7 41 13 31 7 16 2 12 - 97 0 0 15 28 14 3 25 23 57 261 -42 15 7 37 15 48 48 14 13 0 16 42 54 - 96 0 0 16 8 26 3 25 32 56 260 -43 15 47 59 16 28 51 14 53 47 17 22 33 - 95 0 0 16 47 34 3 25 41 55 260 -43 16 27 16 17 7 49 15 33 28 18 1 7 - 94 0 0 17 25 37 3 25 50 54 259 -44 17 5 28 17 45 44 16 12 5 18 38 37 - 93 0 0 18 2 37 3 25 58 53 259 -45 17 42 37 18 22 34 16 49 37 19 15 5 - 92 0 0 18 38 33 3 26 6 52 259 -46 18 18 42 18 58 22 17 26 6 19 50 30 - 91 0 0 19 13 28 3 26 14 51 259 -47 18 53 45 19 33 8 18 1 31 20 24 54 - 90 0 0 19 47 20 3 26 22 50 259 -48 19 27 46 20 6 52 18 35 54 20 58 17 - 89 0 0 20 20 12 3 26 30 49 259 -49 20 0 45 20 39 36 19 9 16 21 30 39 - 88 0 0 20 52 3 3 26 37 48 259 -49 20 32 44 21 11 19 19 41 36 22 2 2 - 87 0 0 21 22 54 3 26 44 47 259 -50 21 3 44 21 42 3 20 12 56 22 32 26 - 86 0 0 21 52 47 3 26 51 46 259 -51 21 33 44 22 11 48 20 43 16 23 1 51 - 85 0 0 22 21 42 3 26 58 45 259 -52 22 2 46 22 40 36 21 12 37 23 30 20 - 84 0 0 22 49 39 3 27 4 44 259 -52 22 30 50 23 8 26 21 41 0 23 57 51 - 83 0 0 23 16 40 3 27 11 43 259 -53 22 57 58 23 35 20 22 8 26 24 24 27 - 82 0 0 23 42 44 3 27 17 42 259 -54 23 24 9 24 1 18 22 34 55 24 50 8 - 81 0 0 24 7 54 3 27 23 41 259 -55 23 49 25 24 26 21 23 0 28 25 14 55 - 80 0 0 24 32 10 3 27 29 40 260 -55 24 13 47 24 50 30 23 25 7 25 38 48 - 79 0 0 24 55 31 3 27 35 39 260 -56 24 37 15 25 13 46 23 48 51 26 1 48 - 78 0 0 25 18 0 3 27 40 38 260 -57 24 59 50 25 36 9 24 11 41 26 23 56 - 77 0 0 25 39 37 3 27 45 37 261 -57 25 21 32 25 57 41 24 33 38 26 45 13 - 76 0 0 26 0 23 3 27 51 36 261 -58 25 42 23 26 18 21 24 54 43 27 5 39 - 75 0 0 26 20 17 3 27 56 35 261 -58 26 2 23 26 38 10 25 14 57 27 25 15 - 74 0 0 26 39 22 3 28 1 34 261 -59 26 21 32 26 57 10 25 34 20 27 44 2 - 73 0 0 26 57 37 3 28 5 33 262 -60 26 39 52 27 15 20 25 52 53 28 2 0 - 72 0 0 27 15 4 3 28 10 32 262 -60 26 57 23 27 32 42 26 10 36 28 19 10 - 71 0 0 27 31 42 3 28 14 31 263 -61 27 14 6 27 49 16 26 27 30 28 35 32 - 70 0 0 27 47 32 3 28 18 30 263 -61 27 30 0 28 5 3 26 43 36 28 51 8 - 69 0 0 28 2 36 3 28 23 29 263 -62 27 45 8 28 20 2 26 58 54 29 5 57 - 68 0 0 28 16 53 3 28 27 28 264 -62 27 59 29 28 34 15 27 13 25 29 20 1 - 67 0 0 28 30 24 3 28 30 27 264 -62 28 13 3 28 47 43 27 27 9 29 33 19 - 66 0 0 28 43 10 3 28 34 26 265 -63 28 25 52 29 0 25 27 40 7 29 45 52 - 65 0 0 28 55 10 3 28 38 25 265 -63 28 37 56 29 12 23 27 52 19 29 57 42 - 64 0 0 29 6 26 3 28 41 25 265 -64 28 49 15 29 23 36 28 3 46 30 8 47 - 63 0 0 29 16 58 3 28 44 24 266 -64 28 59 50 29 34 5 28 14 28 30 19 9 - 62 0 0 29 26 46 3 28 48 23 266 -64 29 9 41 29 43 51 28 24 26 30 28 48 - 61 0 0 29 35 51 3 28 51 22 267 -65 29 18 48 29 52 53 28 33 40 30 37 44 - 60 0 0 29 44 13 3 28 54 21 267 -65 29 27 12 30 1 13 28 42 10 30 45 58 - 59 0 0 29 51 53 3 28 56 20 268 -65 29 34 54 30 8 50 28 49 57 30 53 30 - 58 0 0 29 58 50 3 28 59 19 268 -65 29 41 53 30 15 45 28 57 1 31 0 20 - 57 0 0 30 5 5 3 29 2 18 269 -66 29 48 10 30 21 59 29 3 23 31 6 29 - 56 0 0 30 10 38 3 29 4 17 269 -66 29 53 44 30 27 30 29 9 2 31 11 57 - 55 0 0 30 15 30 3 29 6 17 270 -66 29 58 38 30 32 21 29 13 58 31 16 44 - 54 0 0 30 19 40 3 29 8 16 270 -66 30 2 49 30 36 30 29 18 13 31 20 50 - 53 0 0 30 23 10 3 29 11 15 271 -66 30 6 20 30 39 59 29 21 46 31 24 16 - 52 0 0 30 25 58 3 29 12 14 271 -66 30 9 9 30 42 46 29 24 38 31 27 1 - 51 0 0 30 28 6 3 29 14 13 272 -66 30 11 17 30 44 54 29 26 48 31 29 7 - 50 0 0 30 29 33 3 29 16 12 272 -66 30 12 45 30 46 20 29 28 17 31 30 32 - 49 0 0 30 30 20 3 29 18 11 273 -66 30 13 32 30 47 6 29 29 4 31 31 18 - 48 0 0 30 30 26 3 29 19 10 273 -66 30 13 38 30 47 13 29 29 11 31 31 23 - 47 0 0 30 29 52 3 29 20 10 274 -66 30 13 4 30 46 38 29 28 37 31 30 49 - 46 0 0 30 28 37 3 29 22 9 274 -66 30 11 49 30 45 24 29 27 21 31 29 36 - 45 0 0 30 26 42 3 29 23 8 275 -66 30 9 54 30 43 29 29 25 25 31 27 42 - 44 0 0 30 24 7 3 29 24 7 275 -66 30 7 18 30 40 55 29 22 48 31 25 9 - 43 0 0 30 20 52 3 29 25 6 276 -66 30 4 2 30 37 40 29 19 30 31 21 56 - 42 0 0 30 16 56 3 29 25 5 276 -65 30 0 5 30 33 45 29 15 30 31 18 3 - 41 0 0 30 12 19 3 29 26 4 277 -65 29 55 28 30 29 9 29 10 50 31 13 31 - 40 0 0 30 7 2 3 29 27 4 277 -65 29 50 9 30 23 54 29 5 29 31 8 18 - 39 0 0 30 1 5 3 29 27 3 278 -65 29 44 10 30 17 57 28 59 26 31 2 25 - 38 0 0 29 54 26 3 29 27 2 278 -64 29 37 30 30 11 21 28 52 42 30 55 53 - 37 0 0 29 47 7 3 29 28 1 279 -64 29 30 9 30 4 3 28 45 16 30 48 39 - 36 0 0 29 39 6 3 29 28 0 279 -64 29 22 7 29 56 4 .. .. .. 30 40 46 Uncertainty in time = +/- 6 secs [Prediction of 2008 Feb 27.0] Data for the target star ------------------------ * name: TYC 0701-00962-1 * constellation : Orion * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 05 32 18.9493 DE: +07 54 11.719 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .039, .042 ) * V mag [mag]: 11.4 * B mag [mag]: 12.5 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (246) Asporina approx. diameter [km]: 60 approx. diameter ["]: .032 distance from Earth [AU]: 2.61800 * orbital information: orbit source: Preston date of fit: 2008 Feb 27 source of used astrometry: FASTT TMO MPC (via Astdys) number of used observations: 799 number of rejected observations: 105 time covered by the observations: 1907 Mar 11 - 2008 Feb 17 1 sigma uncertainty ellipse (major, minor, PA): 0.013, 0.008, 84° remarks: * orbital elements for (246) Asporina : Mean anomaly = 208.98998053 deg Arg. of pericenter = 95.62965323 deg Long. of node = 162.50418021 deg Inclination = 15.64146772 deg Eccentricity = 0.10623586 Semimajor axis = 2.69551012 AU Perihelion dist = 2.40915029 AU Mag: H = 8.33, G = 0.15 Epoch of elements : MJD 54528.14000000 TDT (2008 Mar 03.140) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Mar 3 246 Asporina 3h 21.5m UT 11.4 5 32 18.949 7 54 11.72TYC 0701-00962-1 12.5 14.0 60 4.7 2.618 1.167 17.12 -128.5660 7.898 132.62 -6.70 3.3577 0.17941 -0.18310 5.15767 5.09699 0.00580 0.00057 2000 207.1771092008 224.00000 95.629653162.504180 15.6414680.10623586 2.6955101 2.4091503 8.6 5.00.15 RATE 2.2271150 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.043 0.041 360 2.32 0.042 0 54523.5020080303_0962-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Feb 27, 19:21 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org