IOTA/IOTA-ES occultation update for (619) Triberga / TYC 5679-01027-1 event on 2009 Oct 08, 19:30 UT Visible from Summary ------- On 2009 Oct 08 UT, the 34 km diameter asteroid (619) Triberga will occult a 10.0 mag star in the constellation Serpens for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.0 mag to 15.0 mag (the magnitude of the asteroid) for at most 1.3 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: 51 * date and approx. time of event: 2009 Oct 08, 19:29 - 2009 Oct 08, 19:32 UT * magnitude of target star: 10.0 * magnitude drop [mag]: 5.0 * estimated maximum duration [s]: 1.3 * Moon: 78 % sunlit, 155° distance * Sun: 75° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 57 * 1 sigma uncertainty interval [path widths]: +/- 1.24 * 1 sigma uncertainty interval [seconds]: +/- 2.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .029 +/- .023) * 1 sigma uncertainty ellipse (major, minor, PA): ( .029", .023", 89° ) * approx speed of asteroid's shadow [km/s]: 26.0195 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5679-01027-1 by 619 Triberga on 2009 Oct 8 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 - 31 0 0 43 1 14 19 29 29 36 190 0 42 44 49 43 17 46 42 4 33 43 59 17 - 30 0 0 42 45 21 19 29 33 36 191 -1 42 28 57 43 1 50 41 48 47 43 43 15 - 29 0 0 42 29 43 19 29 36 36 193 -2 42 13 22 42 46 11 41 33 17 43 27 30 - 28 0 0 42 14 22 19 29 40 36 194 -2 41 58 3 42 30 47 41 18 4 43 12 1 - 27 0 0 41 59 18 19 29 43 36 195 -3 41 43 2 42 15 41 41 3 8 42 56 49 - 26 0 0 41 44 32 19 29 46 36 196 -4 41 28 18 42 0 53 40 48 29 42 41 55 - 25 0 0 41 30 3 19 29 50 36 198 -5 41 13 51 41 46 22 40 34 8 42 27 18 - 24 0 0 41 15 53 19 29 53 36 199 -5 40 59 43 41 32 10 40 20 5 42 13 1 - 23 0 0 41 2 2 19 29 57 36 200 -6 40 45 54 41 18 17 40 6 20 41 59 2 - 22 0 0 40 48 30 19 30 0 36 201 -7 40 32 24 41 4 42 39 52 55 41 45 22 - 21 0 0 40 35 17 19 30 3 36 203 -8 40 19 13 40 51 28 39 39 49 41 32 2 - 20 0 0 40 22 25 19 30 7 36 204 -8 40 6 23 40 38 33 39 27 3 41 19 3 - 19 0 0 40 9 52 19 30 10 36 205 -9 39 53 52 40 25 58 39 14 37 41 6 23 - 18 0 0 39 57 40 19 30 14 36 206 -10 39 41 42 40 13 44 39 2 32 40 54 4 - 17 0 0 39 45 49 19 30 17 36 208 -11 39 29 52 40 1 51 38 50 47 40 42 6 - 16 0 0 39 34 19 19 30 20 36 209 -11 39 18 24 39 50 20 38 39 23 40 30 30 - 15 0 0 39 23 10 19 30 24 35 210 -12 39 7 17 39 39 9 38 28 20 40 19 15 - 14 0 0 39 12 23 19 30 27 35 211 -13 38 56 32 39 28 21 38 17 39 40 8 22 - 13 0 0 39 1 59 19 30 30 35 212 -14 38 46 9 39 17 54 38 7 20 39 57 51 - 12 0 0 38 51 56 19 30 34 34 213 -15 38 36 8 39 7 50 37 57 23 39 47 43 - 11 0 0 38 42 16 19 30 37 34 215 -15 38 26 30 38 58 8 37 47 48 39 37 57 - 10 0 0 38 32 59 19 30 40 34 216 -16 38 17 14 38 48 50 37 38 36 39 28 34 - 9 0 0 38 24 4 19 30 43 34 217 -17 38 8 21 38 39 54 37 29 46 39 19 35 - 8 0 0 38 15 33 19 30 47 33 218 -18 37 59 51 38 31 21 37 21 20 39 10 59 - 7 0 0 38 7 26 19 30 50 33 219 -19 37 51 45 38 23 12 37 13 17 39 2 46 - 6 0 0 37 59 41 19 30 53 32 220 -19 37 44 2 38 15 27 37 5 37 38 54 57 - 5 0 0 37 52 21 19 30 56 32 221 -20 37 36 43 38 8 5 36 58 21 38 47 32 - 4 0 0 37 45 24 19 30 59 31 222 -21 37 29 47 38 1 7 36 51 28 38 40 32 - 3 0 0 37 38 52 19 31 2 31 223 -22 37 23 16 37 54 34 36 44 59 38 33 55 - 2 0 0 37 32 44 19 31 5 31 224 -23 37 17 9 37 48 24 36 38 54 38 27 43 - 1 0 0 37 27 0 19 31 8 30 225 -23 37 11 26 37 42 40 36 33 14 38 21 56 0 0 0 37 21 40 19 31 11 30 226 -24 37 6 7 37 37 19 36 27 57 38 16 33 1 0 0 37 16 45 19 31 14 29 227 -25 37 1 13 37 32 23 36 23 5 38 11 35 2 0 0 37 12 15 19 31 17 28 228 -26 36 56 44 37 27 52 36 18 38 38 7 2 3 0 0 37 8 10 19 31 19 28 229 -27 36 52 39 37 23 46 36 14 35 38 2 54 4 0 0 37 4 29 19 31 22 27 230 -27 36 48 59 37 20 5 36 10 56 37 59 11 5 0 0 37 1 13 19 31 25 27 231 -28 36 45 44 37 16 48 36 7 42 37 55 53 6 0 0 36 58 22 19 31 27 26 232 -29 36 42 53 37 13 57 36 4 53 37 53 0 7 0 0 36 55 57 19 31 30 26 233 -30 36 40 28 37 11 31 36 2 29 37 50 33 8 0 0 36 53 56 19 31 32 25 233 -31 36 38 28 37 9 30 36 0 30 37 48 31 9 0 0 36 52 20 19 31 35 24 234 -31 36 36 52 37 7 53 35 58 55 37 46 54 10 0 0 36 51 9 19 31 37 24 235 -32 36 35 42 37 6 43 35 57 45 37 45 42 11 0 0 36 50 24 19 31 39 23 236 -33 36 34 56 37 5 57 35 57 0 37 44 56 12 0 0 36 50 3 19 31 42 22 237 -34 36 34 36 37 5 36 35 56 40 37 44 35 13 0 0 36 50 8 19 31 44 22 237 -34 36 34 41 37 5 41 35 56 45 37 44 39 14 0 0 36 50 37 19 31 46 21 238 -35 36 35 10 37 6 10 35 57 14 37 45 9 15 0 0 36 51 32 19 31 48 20 239 -36 36 36 5 37 7 5 35 58 9 37 46 4 16 0 0 36 52 52 19 31 50 19 240 -37 36 37 24 37 8 25 35 59 28 37 47 24 17 0 0 36 54 36 19 31 52 19 240 -37 36 39 9 37 10 9 36 1 12 37 49 9 18 0 0 36 56 46 19 31 54 18 241 -38 36 41 18 37 12 19 36 3 20 37 51 20 19 0 0 36 59 20 19 31 55 17 242 -39 36 43 52 37 14 54 36 5 53 37 53 55 20 0 0 37 2 19 19 31 57 17 243 -40 36 46 50 37 17 53 36 8 51 37 56 55 21 0 0 37 5 42 19 31 59 16 243 -40 36 50 13 37 21 17 36 12 13 38 0 20 22 0 0 37 9 30 19 32 0 15 244 -41 36 54 1 37 25 6 36 15 59 38 4 10 23 0 0 37 13 43 19 32 2 14 245 -42 36 58 13 37 29 19 36 20 10 38 8 25 24 0 0 37 18 19 19 32 3 14 245 -42 37 2 49 37 33 56 36 24 44 38 13 4 25 0 0 37 23 20 19 32 4 13 246 -43 37 7 49 37 38 58 36 29 43 38 18 8 26 0 0 37 28 45 19 32 6 12 247 -44 37 13 13 37 44 24 36 35 5 38 23 36 27 0 0 37 34 34 19 32 7 11 247 -44 37 19 1 37 50 13 36 40 51 38 29 28 28 0 0 37 40 47 19 32 8 11 248 -45 37 25 13 37 56 27 36 47 1 38 35 44 29 0 0 37 47 23 19 32 9 10 249 -45 37 31 48 38 3 4 36 53 34 38 42 23 30 0 0 37 54 23 19 32 10 9 249 -46 37 38 47 38 10 5 37 0 30 38 49 27 31 0 0 38 1 46 19 32 11 8 250 -46 37 46 9 38 17 29 37 7 49 38 56 54 32 0 0 38 9 32 19 32 11 7 250 -47 37 53 53 38 25 16 37 15 31 39 4 44 33 0 0 38 17 41 19 32 12 7 251 -47 38 2 1 38 33 26 37 23 36 39 12 57 34 0 0 38 26 12 19 32 13 6 252 -48 38 10 31 38 41 59 37 32 3 39 21 33 35 0 0 38 35 6 19 32 13 5 252 -48 38 19 24 38 50 54 37 40 52 39 30 31 36 0 0 38 44 22 19 32 14 4 253 -49 38 28 38 39 0 11 .. .. .. 39 39 52 37 0 0 38 53 59 19 32 14 3 254 -49 38 38 15 39 9 50 .. .. .. 39 49 35 38 0 0 39 3 59 19 32 14 3 254 -50 38 48 13 39 19 51 .. .. .. 39 59 40 39 0 0 39 14 20 19 32 15 2 255 -50 38 58 32 39 30 14 .. .. .. 40 10 7 40 0 0 39 25 2 19 32 15 1 256 -50 39 9 13 39 40 57 .. .. .. 40 20 54 41 0 0 39 36 5 19 32 15 0 256 -51 39 20 14 39 52 2 .. .. .. 40 32 3 Uncertainty in time = +/- 2 secs [Prediction of 2008 Apr 25.0] Data for the target star ------------------------ * name: TYC 5679-01027-1 * constellation : Serpens * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 18 02 20.6942 DE: -10 30 32.156 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .019, .020 ) * V mag [mag]: 10.0 * B mag [mag]: 10.4 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (619) Triberga approx. diameter [km]: 34 approx. diameter ["]: .019 distance from Earth [AU]: 2.49800 * orbital information: orbit source: Preston date of fit: 2008 Apr 25 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 813 number of rejected observations: 55 time covered by the observations: 1906 Oct 23 - 2008 Feb 14 1 sigma uncertainty ellipse (major, minor, PA): 0.022, 0.012, 89° remarks: * orbital elements for (619) Triberga : Mean anomaly = 296.63410601 deg Arg. of pericenter = 177.94906988 deg Long. of node = 187.54441799 deg Inclination = 13.78466108 deg Eccentricity = 0.07585667 Semimajor axis = 2.52020273 AU Perihelion dist = 2.32902855 AU Mag: H = 9.76, G = 0.15 Epoch of elements : MJD 55112.81300000 TDT (2009 Oct 08.813) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Oct 8 619 Triberga 19h 29.8m UT 10.0 18 2 20.694-10 30 32.16TYC 5679-01027-1 10.4 15.0 34 1.3 2.498 3.414 -11.78 -39.4295 -10.505 -115.60 -6.16 19.4969 0.18165 0.78150 14.29940 -3.34813 0.00542 0.00034 2000 295.941126200910 6.00000177.949070187.544418 13.7846610.07585667 2.5202027 2.329028510.0 5.00.15 RATE 2.4634900 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.029 0.023 89 2.24 0.023 0 54581.5020091008_1027-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Apr 25, 08:53 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org