IOTA/IOTA-ES occultation update for (819) Barnardiana / TYC 6911-01414-1 event on 2008 May 09, 07:19 UT Visible from Argentina, Chile Summary ------- On 2008 May 09 UT, the 14 km diameter asteroid (819) Barnardiana will occult a 10.2 mag star in the constellation Capricornus for observers along a path across Argentina, Chile. In the case of an occultation, the combined light of the asteroid and the star will drop by 5.0 mag to 15.2 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: 29 * date and approx. time of event: 2008 May 09, 07:11 - 2008 May 09, 07:21 UT * midpoint of event [JD]: 2454595.80510417 * magnitude of target star: 10.2 * magnitude drop [mag]: 5.0 * estimated maximum duration [s]: 1.1 * Moon: 21 % sunlit, 160° distance * Sun: 106° distance * rough path description: Argentina, Chile The occultation path -------------------- * approximate projected width [km]: 16 * 1 sigma uncertainty interval [path widths]: +/- 2.34 * 1 sigma uncertainty interval [seconds]: +/- 3.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .049 +/- .034) * 1 sigma uncertainty ellipse (major, minor, PA): ( .050", .032", 73° ) * approx speed of asteroid's shadow [km/s]: 12.2259 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6911-01414-1 by 819 Barnardiana on 2008 May 9 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 -135 0 0 -32 14 26 7 11 31 1 120 -62 -32 19 20 -32 9 31 -32 42 21 .. .. .. -134 0 0 -32 44 7 7 11 31 2 119 -63 -32 49 1 -32 39 13 -33 12 1 .. .. .. -133 0 0 -33 13 34 7 11 31 3 119 -63 -33 18 28 -33 8 40 -33 41 27 -32 45 48 -132 0 0 -33 42 47 7 11 32 4 118 -64 -33 47 41 -33 37 53 -34 10 39 -33 15 2 -131 0 0 -34 11 45 7 11 32 4 118 -64 -34 16 38 -34 6 51 -34 39 35 -33 44 2 -130 0 0 -34 40 27 7 11 33 5 117 -64 -34 45 20 -34 35 34 -35 8 15 -34 12 45 -129 0 0 -35 8 52 7 11 34 6 117 -65 -35 13 45 -35 3 59 -35 36 39 -34 41 13 -128 0 0 -35 37 0 7 11 35 7 116 -65 -35 41 53 -35 32 8 -36 4 45 -35 9 23 -127 0 0 -36 4 50 7 11 37 8 115 -65 -36 9 43 -35 59 59 -36 32 33 -35 37 15 -126 0 0 -36 32 22 7 11 38 9 115 -66 -36 37 14 -36 27 31 -37 0 2 -36 4 50 -125 0 0 -36 59 35 7 11 40 10 114 -66 -37 4 27 -36 54 44 -37 27 13 -36 32 5 -124 0 0 -37 26 29 7 11 41 11 114 -66 -37 31 20 -37 21 38 -37 54 4 -36 59 2 -123 0 0 -37 53 3 7 11 43 12 113 -66 -37 57 53 -37 48 13 -38 20 34 -37 25 38 -122 0 0 -38 19 16 7 11 45 13 112 -66 -38 24 6 -38 14 26 -38 46 45 -37 51 54 -121 0 0 -38 45 8 7 11 47 14 112 -66 -38 49 57 -38 40 19 -39 12 34 -38 17 49 -120 0 0 -39 10 39 7 11 50 15 111 -66 -39 15 27 -39 5 50 -39 38 1 -38 43 24 -119 0 0 -39 35 48 7 11 52 15 110 -66 -39 40 36 -39 31 0 -40 3 7 -39 8 36 -118 0 0 -40 0 35 7 11 54 16 110 -66 -40 5 23 -39 55 48 -40 27 51 -39 33 27 -117 0 0 -40 25 0 7 11 57 17 109 -66 -40 29 47 -40 20 13 -40 52 12 -39 57 55 -116 0 0 -40 49 2 7 12 0 18 108 -66 -40 53 48 -40 44 16 -41 16 10 -40 22 1 -115 0 0 -41 12 41 7 12 2 19 108 -66 -41 17 26 -41 7 56 -41 39 45 -40 45 44 -114 0 0 -41 35 57 7 12 5 20 107 -65 -41 40 42 -41 31 12 -42 2 57 -41 9 3 -113 0 0 -41 58 49 7 12 8 21 106 -65 -42 3 33 -41 54 5 -42 25 45 -41 32 0 -112 0 0 -42 21 18 7 12 11 21 105 -65 -42 26 1 -42 16 35 -42 48 10 -41 54 32 -111 0 0 -42 43 23 7 12 14 22 105 -65 -42 48 5 -42 38 40 -43 10 11 -42 16 41 -110 0 0 -43 5 4 7 12 18 23 104 -64 -43 9 46 -43 0 22 -43 31 47 -42 38 27 -109 0 0 -43 26 20 7 12 21 24 103 -64 -43 31 2 -43 21 40 -43 53 0 -42 59 48 -108 0 0 -43 47 13 7 12 24 25 102 -64 -43 51 53 -43 42 33 -44 13 48 -43 20 44 -107 0 0 -44 7 41 7 12 28 25 102 -63 -44 12 21 -44 3 2 -44 34 12 -43 41 17 -106 0 0 -44 27 45 7 12 31 26 101 -63 -44 32 24 -44 23 7 -44 54 11 -44 1 25 -105 0 0 -44 47 25 7 12 35 27 100 -62 -44 52 3 -44 42 47 -45 13 46 -44 21 9 -104 0 0 -45 6 40 7 12 39 28 99 -62 -45 11 17 -45 2 2 -45 32 57 -44 40 28 -103 0 0 -45 25 30 7 12 42 28 98 -62 -45 30 7 -45 20 54 -45 51 43 -44 59 23 -102 0 0 -45 43 56 7 12 46 29 97 -61 -45 48 32 -45 39 21 -46 10 5 -45 17 54 -101 0 0 -46 1 58 7 12 50 30 97 -61 -46 6 33 -45 57 23 -46 28 2 -45 36 0 -100 0 0 -46 19 35 7 12 54 31 96 -60 -46 24 9 -46 15 1 -46 45 34 -45 53 41 - 99 0 0 -46 36 48 7 12 58 31 95 -60 -46 41 21 -46 32 14 -47 2 43 -46 10 58 - 98 0 0 -46 53 36 7 13 2 32 94 -59 -46 58 9 -46 49 4 -47 19 27 -46 27 51 - 97 0 0 -47 10 0 7 13 6 33 93 -59 -47 14 32 -47 5 29 -47 35 46 -46 44 20 - 96 0 0 -47 26 0 7 13 10 34 92 -58 -47 30 31 -47 21 29 -47 51 42 -47 0 24 - 95 0 0 -47 41 36 7 13 14 34 91 -58 -47 46 6 -47 37 6 -48 7 14 -47 16 4 - 94 0 0 -47 56 48 7 13 18 35 90 -57 -48 1 17 -47 52 18 -48 22 21 -47 31 20 - 93 0 0 -48 11 36 7 13 23 36 89 -57 -48 16 4 -48 7 7 -48 37 5 -47 46 12 - 92 0 0 -48 26 0 7 13 27 36 89 -56 -48 30 28 -48 21 32 -48 51 25 -48 0 41 - 91 0 0 -48 40 0 7 13 31 37 88 -55 -48 44 27 -48 35 33 -49 5 21 -48 14 45 - 90 0 0 -48 53 37 7 13 36 38 87 -55 -48 58 4 -48 49 11 -49 18 54 -48 28 26 - 89 0 0 -49 6 50 7 13 40 38 86 -54 -49 11 16 -49 2 25 -49 32 3 -48 41 43 - 88 0 0 -49 19 40 7 13 44 39 85 -54 -49 24 6 -49 15 15 -49 44 49 -48 54 37 - 87 0 0 -49 32 7 7 13 49 40 84 -53 -49 36 32 -49 27 43 -49 57 12 -49 7 8 - 86 0 0 -49 44 11 7 13 53 40 83 -53 -49 48 35 -49 39 47 -50 9 12 -49 19 15 - 85 0 0 -49 55 52 7 13 58 41 82 -52 -50 0 15 -49 51 29 -50 20 49 -49 31 0 - 84 0 0 -50 7 10 7 14 2 41 81 -52 -50 11 32 -50 2 47 -50 32 3 -49 42 22 - 83 0 0 -50 18 5 7 14 7 42 80 -51 -50 22 27 -50 13 43 -50 42 55 -49 53 20 - 82 0 0 -50 28 38 7 14 12 43 79 -50 -50 32 59 -50 24 17 -50 53 24 -50 3 57 - 81 0 0 -50 38 48 7 14 16 43 77 -50 -50 43 9 -50 34 28 -51 3 31 -50 14 11 - 80 0 0 -50 48 36 7 14 21 44 76 -49 -50 52 56 -50 44 16 -51 13 16 -50 24 2 - 79 0 0 -50 58 2 7 14 25 44 75 -49 -51 2 22 -50 53 43 -51 22 38 -50 33 31 - 78 0 0 -51 7 6 7 14 30 45 74 -48 -51 11 25 -51 2 47 -51 31 39 -50 42 38 - 77 0 0 -51 15 48 7 14 35 46 73 -48 -51 20 7 -51 11 30 -51 40 18 -50 51 23 - 76 0 0 -51 24 9 7 14 40 46 72 -47 -51 28 27 -51 19 51 -51 48 36 -50 59 47 - 75 0 0 -51 32 7 7 14 44 47 71 -46 -51 36 25 -51 27 50 -51 56 32 -51 7 48 - 74 0 0 -51 39 45 7 14 49 47 70 -46 -51 44 2 -51 35 28 -52 4 6 -51 15 28 - 73 0 0 -51 47 0 7 14 54 48 68 -45 -51 51 17 -51 42 44 -52 11 19 -51 22 46 - 72 0 0 -51 53 55 7 14 59 48 67 -45 -51 58 11 -51 49 39 -52 18 11 -51 29 43 - 71 0 0 -52 0 28 7 15 4 49 66 -44 -52 4 44 -51 56 13 -52 24 42 -51 36 19 - 70 0 0 -52 6 41 7 15 9 49 65 -43 -52 10 56 -52 2 26 -52 30 53 -51 42 34 - 69 0 0 -52 12 32 7 15 14 50 64 -43 -52 16 47 -52 8 17 -52 36 42 -51 48 27 - 68 0 0 -52 18 3 7 15 18 50 62 -42 -52 22 17 -52 13 48 -52 42 10 -51 54 0 - 67 0 0 -52 23 12 7 15 23 51 61 -42 -52 27 27 -52 18 58 -52 47 18 -51 59 12 - 66 0 0 -52 28 1 7 15 28 51 60 -41 -52 32 15 -52 23 48 -52 52 5 -52 4 2 - 65 0 0 -52 32 30 7 15 33 52 59 -41 -52 36 43 -52 28 16 -52 56 32 -52 8 33 - 64 0 0 -52 36 38 7 15 38 52 57 -40 -52 40 51 -52 32 25 -53 0 38 -52 12 42 - 63 0 0 -52 40 25 7 15 43 53 56 -39 -52 44 38 -52 36 12 -53 4 24 -52 16 31 - 62 0 0 -52 43 52 7 15 48 53 55 -39 -52 48 5 -52 39 40 -53 7 50 -52 19 59 - 61 0 0 -52 46 59 7 15 53 54 53 -38 -52 51 12 -52 42 47 -53 10 56 -52 23 7 - 60 0 0 -52 49 46 7 15 59 54 52 -38 -52 53 58 -52 45 33 -53 13 41 -52 25 55 - 59 0 0 -52 52 12 7 16 4 55 50 -37 -52 56 24 -52 48 0 -53 16 6 -52 28 22 - 58 0 0 -52 54 18 7 16 9 55 49 -36 -52 58 30 -52 50 6 -53 18 12 -52 30 29 - 57 0 0 -52 56 4 7 16 14 56 48 -36 -53 0 16 -52 51 52 -53 19 57 -52 32 16 - 56 0 0 -52 57 30 7 16 19 56 46 -35 -53 1 41 -52 53 18 -53 21 22 -52 33 42 - 55 0 0 -52 58 35 7 16 24 56 45 -35 -53 2 47 -52 54 24 -53 22 27 -52 34 48 - 54 0 0 -52 59 21 7 16 29 57 43 -34 -53 3 32 -52 55 9 -53 23 12 -52 35 34 - 53 0 0 -52 59 46 7 16 35 57 42 -33 -53 3 58 -52 55 35 -53 23 38 -52 35 59 - 52 0 0 -52 59 52 7 16 40 58 40 -33 -53 4 3 -52 55 40 -53 23 43 -52 36 5 - 51 0 0 -52 59 37 7 16 45 58 38 -32 -53 3 49 -52 55 25 -53 23 28 -52 35 50 - 50 0 0 -52 59 2 7 16 51 58 37 -32 -53 3 14 -52 54 51 -53 22 54 -52 35 15 - 49 0 0 -52 58 7 7 16 56 59 35 -31 -53 2 19 -52 53 56 -53 21 59 -52 34 20 - 48 0 0 -52 56 52 7 17 1 59 34 -31 -53 1 4 -52 52 40 -53 20 44 -52 33 4 - 47 0 0 -52 55 17 7 17 7 60 32 -30 -52 59 29 -52 51 5 -53 19 10 -52 31 29 - 46 0 0 -52 53 21 7 17 12 60 30 -29 -52 57 33 -52 49 10 -53 17 15 -52 29 33 - 45 0 0 -52 51 6 7 17 18 60 28 -29 -52 55 18 -52 46 54 -53 15 0 -52 27 16 - 44 0 0 -52 48 30 7 17 23 61 27 -28 -52 52 42 -52 44 18 -53 12 25 -52 24 39 - 43 0 0 -52 45 33 7 17 28 61 25 -27 -52 49 46 -52 41 21 -53 9 30 -52 21 42 - 42 0 0 -52 42 17 7 17 34 61 23 -27 -52 46 29 -52 38 4 -53 6 14 -52 18 24 - 41 0 0 -52 38 39 7 17 40 61 21 -26 -52 42 52 -52 34 27 -53 2 38 -52 14 45 - 40 0 0 -52 34 42 7 17 45 62 19 -26 -52 38 55 -52 30 29 -52 58 42 -52 10 46 - 39 0 0 -52 30 23 7 17 51 62 17 -25 -52 34 37 -52 26 10 -52 54 25 -52 6 26 - 38 0 0 -52 25 44 7 17 56 62 16 -24 -52 29 58 -52 21 30 -52 49 47 -52 1 45 - 37 0 0 -52 20 44 7 18 2 62 14 -24 -52 24 58 -52 16 30 -52 44 49 -51 56 44 - 36 0 0 -52 15 23 7 18 8 63 12 -23 -52 19 38 -52 11 9 -52 39 30 -51 51 21 - 35 0 0 -52 9 41 7 18 13 63 10 -23 -52 13 56 -52 5 27 -52 33 50 -51 45 37 - 34 0 0 -52 3 38 7 18 19 63 8 -22 -52 7 53 -51 59 23 -52 27 50 -51 39 32 - 33 0 0 -51 57 14 7 18 25 63 6 -21 -52 1 29 -51 52 58 -52 21 28 -51 33 5 - 32 0 0 -51 50 28 7 18 31 63 4 -21 -51 54 44 -51 46 12 -52 14 44 -51 26 17 - 31 0 0 -51 43 21 7 18 37 64 1 -20 -51 47 38 -51 39 5 -52 7 40 -51 19 7 - 30 0 0 -51 35 52 7 18 43 64 359 -19 -51 40 9 -51 31 36 -52 0 14 -51 11 36 - 29 0 0 -51 28 2 7 18 48 64 357 -19 -51 32 19 -51 23 45 -51 52 26 -51 3 43 - 28 0 0 -51 19 50 7 18 54 64 355 -18 -51 24 7 -51 15 32 -51 44 16 -50 55 28 - 27 0 0 -51 11 15 7 19 0 64 353 -17 -51 15 34 -51 6 57 -51 35 45 -50 46 50 - 26 0 0 -51 2 19 7 19 6 64 351 -17 -51 6 37 -50 58 0 -51 26 51 -50 37 51 - 25 0 0 -50 53 0 7 19 12 64 349 -16 -50 57 19 -50 48 40 -51 17 36 -50 28 29 - 24 0 0 -50 43 18 7 19 19 64 346 -15 -50 47 38 -50 38 58 -51 7 58 -50 18 44 - 23 0 0 -50 33 14 7 19 25 64 344 -15 -50 37 35 -50 28 54 -50 57 57 -50 8 37 - 22 0 0 -50 22 48 7 19 31 64 342 -14 -50 27 9 -50 18 27 -50 47 34 -49 58 7 - 21 0 0 -50 11 58 7 19 37 64 340 -13 -50 16 20 -50 7 36 -50 36 48 -49 47 13 - 20 0 0 -50 0 45 7 19 43 64 338 -13 -50 5 8 -49 56 23 -50 25 39 -49 35 57 - 19 0 0 -49 49 9 7 19 50 64 335 -12 -49 53 32 -49 44 46 -50 14 6 -49 24 17 - 18 0 0 -49 37 10 7 19 56 64 333 -11 -49 41 34 -49 32 46 -50 2 11 -49 12 14 - 17 0 0 -49 24 47 7 20 2 64 331 -11 -49 29 11 -49 20 22 -49 49 52 -48 59 47 - 16 0 0 -49 12 0 7 20 9 64 329 -10 -49 16 25 -49 7 35 -49 37 9 -48 46 57 - 15 0 0 -48 58 49 7 20 15 63 327 -9 -49 3 15 -48 54 24 -49 24 2 -48 33 42 - 14 0 0 -48 45 15 7 20 21 63 324 -9 -48 49 41 -48 40 48 -49 10 32 -48 20 3 - 13 0 0 -48 31 16 7 20 28 63 322 -8 -48 35 43 -48 26 49 -48 56 37 -48 6 0 - 12 0 0 -48 16 53 7 20 34 63 320 -7 -48 21 21 -48 12 25 -48 42 18 -47 51 33 - 11 0 0 -48 2 5 7 20 41 62 318 -6 -48 6 34 -47 57 36 -48 27 35 -47 36 41 - 10 0 0 -47 46 53 7 20 48 62 316 -6 -47 51 23 -47 42 23 -48 12 27 -47 21 24 - 9 0 0 -47 31 16 7 20 54 62 314 -5 -47 35 46 -47 26 46 -47 56 55 -47 5 43 - 8 0 0 -47 15 14 7 21 1 62 312 -4 -47 19 45 -47 10 43 -47 40 57 -46 49 36 - 7 0 0 -46 58 47 7 21 8 61 310 -3 -47 3 19 -46 54 15 -47 24 35 -46 33 5 - 6 0 0 -46 41 55 7 21 14 61 308 -3 -46 46 28 -46 37 23 -47 7 48 -46 16 9 - 5 0 0 -46 24 38 7 21 21 60 306 -2 -46 29 12 -46 20 5 -46 50 35 -45 58 47 - 4 0 0 -46 6 56 7 21 28 60 304 -1 -46 11 30 -46 2 21 -46 32 57 -45 41 0 - 3 0 0 -45 48 48 7 21 35 60 302 0 -45 53 23 -45 44 13 -46 14 54 -45 22 47 Uncertainty in time = +/- 4 secs [Prediction of 2008 Feb 17.0] Data for the target star ------------------------ * name: TYC 6911-01414-1 * constellation : Capricornus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 20 26 46.6184 DE: -25 24 39.196 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .023, .021 ) * V mag [mag]: 10.2 * B mag [mag]: 11.3 * Apparent position with proper motion RA(deg): 306.8236550616 DE(deg): -25.3831434641 * Equation of equinoxes (radians) : 0.000040318701896 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (819) Barnardiana approx. diameter [km]: 14 approx. diameter ["]: .014 distance from Earth [AU]: 1.34200 * orbital information: orbit source: Preston date of fit: 2008 Feb 16 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1070 number of rejected observations: 48 time covered by the observations: 1904 Sep 19 - 2007 May 14 1 sigma uncertainty ellipse (major, minor, PA): 0.045, 0.025, 69° remarks: * orbital elements for (819) Barnardiana : Mean anomaly = 354.44005175 deg Arg. of pericenter = 305.92600820 deg Long. of node = 333.30580897 deg Inclination = 4.89596145 deg Eccentricity = 0.14199338 Semimajor axis = 2.19786724 AU Perihelion dist = 1.88578465 AU Mag: H = 11.88, G = 0.15 Epoch of elements : MJD 54595.30500000 TDT (2008 May 09.305) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 May 9 819 Barnardiana 7h 19.4m UT 10.2 20 26 46.618-25 24 39.20TYC 6911-01414-1 11.3 15.2 14 1.1 1.342 3.287 7.87 -30.6243 -25.414 69.28 17.48 7.3225 0.07626 -0.42506 6.79521 1.20150 -0.00472 -0.00101 2000 352.8353762008 5 4.00000305.926008333.305809 4.8959610.14199338 2.1978672 1.885784611.9 5.00.15 RATE 3.0248370 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.050 0.032 73 3.34 0.034 0 54513.5020080509_1414-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 31, 04:20 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org