IOTA/IOTA-ES occultation update for (290) Bruna / TYC 6106-00148-1 event on 2008 Jul 03, 02:36 UT Visible from Brazil, Argentina, Chile Summary ------- On 2008 Jul 03 UT, the 17 km diameter asteroid (290) Bruna will occult a 9.0 mag star in the constellation Corvus for observers along a path across Brazil, Argentina, Chile. In the case of an occultation, the combined light of the asteroid and the star will drop by 7.1 mag to 16.1 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: 2008 Jul 03, 02:36 - 2008 Jul 03, 02:43 UT * midpoint of event [JD]: 2454650.6086625 * magnitude of target star: 9.0 * magnitude drop [mag]: 7.1 * estimated maximum duration [s]: 1.1 * Moon: 0 % sunlit, 95° distance * Sun: 94° distance * rough path description: Brazil, Argentina, Chile The occultation path -------------------- * approximate projected width [km]: 17 * 1 sigma uncertainty interval [path widths]: +/- 2.73 * 1 sigma uncertainty interval [seconds]: +/- 2.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .028 +/- .032) * 1 sigma uncertainty ellipse (major, minor, PA): ( .032", .028", 161° ) * approx speed of asteroid's shadow [km/s]: 15.0689 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6106-00148-1 by 290 Bruna on 2008 Jul 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 ' " Latitude Latitude Latitude Latitude -131 0 0 - 9 55 10 2 36 1 81 182 -1 -10 0 26 - 9 49 53 -10 29 12 - 9 21 4 -130 0 0 -10 26 30 2 36 9 81 189 -2 -10 31 45 -10 21 15 -11 0 26 - 9 52 31 -129 0 0 -10 57 19 2 36 18 82 196 -3 -11 2 33 -10 52 4 -11 31 8 -10 23 26 -128 0 0 -11 27 35 2 36 26 82 203 -4 -11 32 48 -11 22 22 -12 1 17 -10 53 49 -127 0 0 -11 57 18 2 36 34 82 211 -6 -12 2 31 -11 52 6 -12 30 54 -11 23 40 -126 0 0 -12 26 29 2 36 43 82 218 -7 -12 31 40 -12 21 18 -12 59 58 -11 52 57 -125 0 0 -12 55 6 2 36 51 81 225 -8 -13 0 16 -12 49 55 -13 28 28 -12 21 40 -124 0 0 -13 23 8 2 36 59 81 231 -9 -13 28 17 -13 17 59 -13 56 24 -12 49 50 -123 0 0 -13 50 37 2 37 7 80 237 -10 -13 55 45 -13 45 29 -14 23 45 -13 17 25 -122 0 0 -14 17 31 2 37 15 80 242 -11 -14 22 38 -14 12 24 -14 50 33 -13 44 26 -121 0 0 -14 43 51 2 37 23 79 246 -12 -14 48 56 -14 38 45 -15 16 45 -14 10 52 -120 0 0 -15 9 35 2 37 31 78 249 -13 -15 14 40 -15 4 30 -15 42 23 -14 36 44 -119 0 0 -15 34 44 2 37 39 77 252 -14 -15 39 48 -15 29 40 -16 7 26 -15 2 0 -118 0 0 -15 59 18 2 37 47 76 255 -15 -16 4 21 -15 54 16 -16 31 54 -15 26 40 -117 0 0 -16 23 17 2 37 55 76 257 -17 -16 28 19 -16 18 15 -16 55 46 -15 50 45 -116 0 0 -16 46 41 2 38 2 75 259 -18 -16 51 41 -16 41 40 -17 19 3 -16 14 15 -115 0 0 -17 9 28 2 38 10 74 261 -19 -17 14 28 -17 4 28 -17 41 44 -16 37 9 -114 0 0 -17 31 40 2 38 17 73 262 -20 -17 36 39 -17 26 41 -18 3 50 -16 59 28 -113 0 0 -17 53 17 2 38 25 72 263 -21 -17 58 15 -17 48 19 -18 25 21 -17 21 10 -112 0 0 -18 14 18 2 38 32 71 264 -22 -18 19 15 -18 9 21 -18 46 16 -17 42 17 -111 0 0 -18 34 43 2 38 39 70 265 -23 -18 39 39 -18 29 47 -19 6 35 -18 2 49 -110 0 0 -18 54 33 2 38 47 69 266 -24 -18 59 28 -18 49 38 -19 26 19 -18 22 44 -109 0 0 -19 13 47 2 38 54 68 267 -25 -19 18 42 -19 8 53 -19 45 28 -18 42 4 -108 0 0 -19 32 26 2 39 1 67 267 -26 -19 37 19 -19 27 32 -20 4 1 -19 0 48 -107 0 0 -19 50 29 2 39 8 66 268 -27 -19 55 22 -19 45 37 -20 21 59 -19 18 57 -106 0 0 -20 7 57 2 39 15 65 268 -28 -20 12 49 -20 3 5 -20 39 21 -19 36 30 -105 0 0 -20 24 50 2 39 21 64 268 -29 -20 29 41 -20 19 59 -20 56 9 -19 53 28 -104 0 0 -20 41 7 2 39 28 63 269 -30 -20 45 58 -20 36 17 -21 12 21 -20 9 50 -103 0 0 -20 56 50 2 39 35 62 269 -31 -21 1 39 -20 52 0 -21 27 59 -20 25 38 -102 0 0 -21 11 57 2 39 41 61 269 -32 -21 16 46 -21 7 8 -21 43 2 -20 40 50 -101 0 0 -21 26 30 2 39 48 61 269 -33 -21 31 18 -21 21 41 -21 57 30 -20 55 27 -100 0 0 -21 40 27 2 39 54 60 269 -34 -21 45 15 -21 35 40 -22 11 23 -21 9 29 - 99 0 0 -21 53 50 2 40 0 59 269 -35 -21 58 37 -21 49 4 -22 24 42 -21 22 56 - 98 0 0 -22 6 39 2 40 6 58 269 -36 -22 11 25 -22 1 53 -22 37 27 -21 35 49 - 97 0 0 -22 18 53 2 40 13 57 269 -37 -22 23 39 -22 14 8 -22 49 37 -21 48 7 - 96 0 0 -22 30 33 2 40 19 56 269 -38 -22 35 18 -22 25 48 -23 1 13 -21 59 51 - 95 0 0 -22 41 39 2 40 25 55 269 -39 -22 46 23 -22 36 54 -23 12 15 -22 11 0 - 94 0 0 -22 52 11 2 40 30 54 269 -40 -22 56 55 -22 47 27 -23 22 44 -22 21 35 - 93 0 0 -23 2 9 2 40 36 53 269 -41 -23 6 52 -22 57 25 -23 32 38 -22 31 36 - 92 0 0 -23 11 33 2 40 42 52 268 -42 -23 16 15 -23 6 50 -23 41 59 -22 41 3 - 91 0 0 -23 20 23 2 40 47 51 268 -43 -23 25 5 -23 15 40 -23 50 47 -22 49 57 - 90 0 0 -23 28 40 2 40 53 50 268 -43 -23 33 22 -23 23 58 -23 59 1 -22 58 16 - 89 0 0 -23 36 23 2 40 58 49 268 -44 -23 41 5 -23 31 41 -24 6 42 -23 6 2 - 88 0 0 -23 43 33 2 41 3 48 268 -45 -23 48 14 -23 38 52 -24 13 49 -23 13 14 - 87 0 0 -23 50 10 2 41 9 47 267 -46 -23 54 51 -23 45 29 -24 20 24 -23 19 53 - 86 0 0 -23 56 13 2 41 14 46 267 -47 -24 0 54 -23 51 33 -24 26 25 -23 25 59 - 85 0 0 -24 1 44 2 41 19 46 267 -48 -24 6 24 -23 57 4 -24 31 54 -23 31 32 - 84 0 0 -24 6 42 2 41 24 45 267 -49 -24 11 22 -24 2 2 -24 36 50 -23 36 31 - 83 0 0 -24 11 7 2 41 29 44 266 -50 -24 15 46 -24 6 27 -24 41 14 -23 40 57 - 82 0 0 -24 14 59 2 41 33 43 266 -51 -24 19 38 -24 10 19 -24 45 4 -23 44 50 - 81 0 0 -24 18 18 2 41 38 42 266 -52 -24 22 57 -24 13 38 -24 48 22 -23 48 11 - 80 0 0 -24 21 5 2 41 43 41 265 -53 -24 25 44 -24 16 25 -24 51 8 -23 50 59 - 79 0 0 -24 23 19 2 41 47 40 265 -54 -24 27 58 -24 18 39 -24 53 21 -23 53 13 - 78 0 0 -24 25 0 2 41 52 39 265 -55 -24 29 39 -24 20 21 -24 55 2 -23 54 56 - 77 0 0 -24 26 9 2 41 56 38 264 -56 -24 30 48 -24 21 30 -24 56 11 -23 56 5 - 76 0 0 -24 26 46 2 42 0 37 264 -57 -24 31 25 -24 22 7 -24 56 48 -23 56 42 - 75 0 0 -24 26 51 2 42 4 36 264 -57 -24 31 30 -24 22 11 -24 56 52 -23 56 47 - 74 0 0 -24 26 23 2 42 8 35 263 -58 -24 31 2 -24 21 43 -24 56 24 -23 56 19 - 73 0 0 -24 25 22 2 42 12 34 263 -59 -24 30 1 -24 20 43 -24 55 24 -23 55 18 - 72 0 0 -24 23 50 2 42 16 34 263 -60 -24 28 29 -24 19 11 -24 53 52 -23 53 45 - 71 0 0 -24 21 45 2 42 20 33 262 -61 -24 26 24 -24 17 6 -24 51 48 -23 51 40 - 70 0 0 -24 19 8 2 42 24 32 262 -62 -24 23 47 -24 14 29 -24 49 12 -23 49 2 - 69 0 0 -24 15 59 2 42 27 31 262 -63 -24 20 38 -24 11 19 -24 46 4 -23 45 52 - 68 0 0 -24 12 17 2 42 31 30 261 -64 -24 16 57 -24 7 38 -24 42 23 -23 42 9 - 67 0 0 -24 8 4 2 42 34 29 261 -65 -24 12 44 -24 3 24 -24 38 11 -23 37 54 - 66 0 0 -24 3 18 2 42 37 28 260 -66 -24 7 58 -23 58 38 -24 33 26 -23 33 7 - 65 0 0 -23 58 0 2 42 41 27 260 -67 -24 2 40 -23 53 19 -24 28 10 -23 27 47 - 64 0 0 -23 52 9 2 42 44 26 260 -68 -23 56 50 -23 47 29 -24 22 21 -23 21 55 - 63 0 0 -23 45 47 2 42 47 25 259 -68 -23 50 28 -23 41 6 -24 16 1 -23 15 31 - 62 0 0 -23 38 52 2 42 50 24 259 -69 -23 43 33 -23 34 11 -24 9 8 -23 8 33 - 61 0 0 -23 31 25 2 42 53 23 259 -70 -23 36 6 -23 26 43 -24 1 43 -23 1 4 - 60 0 0 -23 23 25 2 42 55 22 258 -71 -23 28 7 -23 18 43 -23 53 46 -22 53 2 - 59 0 0 -23 14 53 2 42 58 21 258 -72 -23 19 36 -23 10 11 -23 45 16 -22 44 27 - 58 0 0 -23 5 49 2 43 0 21 257 -73 -23 10 32 -23 1 6 -23 36 15 -22 35 20 - 57 0 0 -22 56 12 2 43 3 20 257 -74 -23 0 55 -22 51 29 -23 26 41 -22 25 41 - 56 0 0 -22 46 3 2 43 5 19 257 -75 -22 50 47 -22 41 19 -23 16 35 -22 15 28 - 55 0 0 -22 35 21 2 43 7 18 256 -76 -22 40 5 -22 30 37 -23 5 56 -22 4 43 - 54 0 0 -22 24 7 2 43 9 17 256 -77 -22 28 51 -22 19 22 -22 54 45 -21 53 26 - 53 0 0 -22 12 20 2 43 11 16 256 -78 -22 17 5 -22 7 35 -22 43 2 -21 41 35 - 52 0 0 -22 0 0 2 43 13 15 255 -78 -22 4 46 -21 55 14 -22 30 46 -21 29 12 - 51 0 0 -21 47 8 2 43 15 14 255 -79 -21 51 55 -21 42 22 -22 17 58 -21 16 16 - 50 0 0 -21 33 43 2 43 17 13 254 -80 -21 38 31 -21 28 56 -22 4 37 -21 2 48 - 49 0 0 -21 19 46 2 43 18 12 254 -81 -21 24 34 -21 14 58 -21 50 43 -20 48 46 - 48 0 0 -21 5 16 2 43 20 11 254 -82 -21 10 4 -21 0 27 -21 36 17 -20 34 12 - 47 0 0 -20 50 13 2 43 21 10 253 -83 -20 55 2 -20 45 24 -21 21 19 -20 19 5 - 46 0 0 -20 34 37 2 43 22 9 253 -84 -20 39 27 -20 29 47 -21 5 47 -20 3 24 - 45 0 0 -20 18 29 2 43 23 8 253 -84 -20 23 19 -20 13 38 -20 49 43 -19 47 11 - 44 0 0 -20 1 47 2 43 24 7 252 -85 -20 6 38 -19 56 56 -20 33 7 -19 30 25 - 43 0 0 -19 44 33 2 43 25 6 252 -85 -19 49 25 -19 39 41 -20 15 57 -19 13 7 - 42 0 0 -19 26 46 2 43 26 5 252 -86 -19 31 39 -19 21 54 -19 58 15 -18 55 15 - 41 0 0 -19 8 27 2 43 27 4 251 -86 -19 13 20 -19 3 34 -19 40 1 -18 36 51 - 40 0 0 -18 49 35 2 43 27 3 251 -86 -18 54 29 -18 44 41 -19 21 14 -18 17 53 - 39 0 0 -18 30 10 2 43 27 2 251 -85 -18 35 5 -18 25 15 -19 1 54 -17 58 23 - 38 0 0 -18 10 13 2 43 28 1 250 -85 -18 15 8 -18 5 17 -18 42 2 -17 38 21 - 37 0 0 -17 49 43 2 43 28 0 250 -84 -17 54 39 -17 44 46 -18 21 37 .. .. .. Uncertainty in time = +/- 3 secs [Prediction of 2008 May 26.0] Data for the target star ------------------------ * name: TYC 6106-00148-1 * constellation : Corvus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 12 36 16.2485 DE: -18 53 21.273 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .024, .024 ) * V mag [mag]: 9.0 * B mag [mag]: 10.5 * Apparent position with proper motion RA(deg): 189.1814325275 DE(deg): -18.9389003200 * Equation of equinoxes (radians) : 0.000050641518423 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (290) Bruna approx. diameter [km]: 17 approx. diameter ["]: .011 distance from Earth [AU]: 2.07100 * orbital information: orbit source: Preston date of fit: 2008 May 22 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 463 number of rejected observations: 23 time covered by the observations: 1915 Apr 15 - 2008 May 08 1 sigma uncertainty ellipse (major, minor, PA): 0.023, 0.015, 141° remarks: * orbital elements for (290) Bruna : Mean anomaly = 78.80903114 deg Arg. of pericenter = 104.67712514 deg Long. of node = 10.63534530 deg Inclination = 22.30567633 deg Eccentricity = 0.25859259 Semimajor axis = 2.33710346 AU Perihelion dist = 1.73274583 AU Mag: H = 11.91, G = 0.15 Epoch of elements : MJD 54650.10900000 TDT (2008 Jul 03.109) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Jul 3 290 Bruna 2h 36.5m UT 9.0 12 36 16.248-18 53 21.27TYC 6106-00148-1 10.5 16.1 17 1.1 2.071 2.269 -16.38 -131.5496 -18.885 141.94 22.94 2.6079 0.06382 0.12820 7.58036 -3.85724 0.00497 -0.00209 2000 76.0203722008 623.00000104.677125 10.635345 22.3056760.25859259 2.3371035 1.732745811.5 5.00.15 RATE 2.7585900 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.032 0.028 161 3.73 0.030 0 54612.5020080703_0148-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 May 26, 14:41 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org