IOTA/IOTA-ES occultation update for (480) Hansa / TYC 1057-02086-1 event on 2009 Sep 07, 20:45 UT Visible from Summary ------- On 2009 Sep 07 UT, the 59 km diameter asteroid (480) Hansa will occult a 8.6 mag star in the constellation Aquila for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.4 mag to 13.0 mag (the magnitude of the asteroid) for at most 7.9 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: 83 * date and approx. time of event: 2009 Sep 07, 20:34 - 2009 Sep 07, 20:56 UT * magnitude of target star: 8.6 * magnitude drop [mag]: 4.4 * estimated maximum duration [s]: 7.9 * Moon: 89 % sunlit, 83° distance * Sun: 127° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 75 * 1 sigma uncertainty interval [path widths]: +/- 0.63 * 1 sigma uncertainty interval [seconds]: +/- 4.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .026 +/- .022) * 1 sigma uncertainty ellipse (major, minor, PA): ( .027", .022", 79° ) * approx speed of asteroid's shadow [km/s]: 7.4647 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1057-02086-1 by 480 Hansa on 2009 Sep 7 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 61 54 34 -65 0 0 20 56 38 2 293 -30 60 3 56 63 56 2 57 56 7 ... .. .. 57 26 43 -64 0 0 20 56 36 4 297 -31 55 57 28 59 1 24 54 11 23 61 10 21 53 57 18 -63 0 0 20 56 33 6 300 -32 52 40 41 55 17 16 51 8 17 57 3 41 51 4 48 -62 0 0 20 56 29 7 303 -34 49 56 47 52 15 9 48 34 2 53 47 33 48 38 27 -61 0 0 20 56 25 9 305 -35 47 36 46 49 41 51 46 21 17 51 4 29 46 31 52 -60 0 0 20 56 20 10 307 -36 45 35 7 47 29 58 44 25 21 48 45 16 44 40 55 -59 0 0 20 56 15 12 308 -37 43 48 7 45 34 47 42 43 2 46 44 20 43 2 41 -58 0 0 20 56 10 13 310 -38 42 13 10 43 53 5 41 11 58 44 57 58 41 35 3 -57 0 0 20 56 4 14 311 -39 40 48 18 42 22 33 39 50 25 43 23 33 40 16 25 -56 0 0 20 55 58 16 312 -40 39 32 3 41 1 26 38 37 1 41 59 8 39 5 32 -55 0 0 20 55 52 17 313 -41 38 23 14 39 48 24 37 30 41 40 43 16 38 1 24 -54 0 0 20 55 45 18 314 -41 37 20 54 38 42 23 36 30 33 39 34 46 37 3 11 -53 0 0 20 55 38 19 314 -42 36 24 19 37 42 30 35 35 55 38 32 42 36 10 15 -52 0 0 20 55 31 20 315 -43 35 32 48 36 48 5 34 46 10 37 36 20 35 22 1 -51 0 0 20 55 24 21 315 -44 34 45 52 35 58 31 34 0 49 36 45 2 34 38 1 -50 0 0 20 55 16 22 316 -45 34 3 3 35 13 18 33 19 26 35 58 16 33 57 51 -49 0 0 20 55 8 23 316 -46 33 23 57 34 32 3 32 41 38 35 15 35 33 21 10 -48 0 0 20 54 59 24 317 -47 32 48 14 33 54 22 32 7 7 34 36 36 32 47 40 -47 0 0 20 54 51 25 317 -47 32 15 38 33 19 57 31 35 37 34 1 1 32 17 6 -46 0 0 20 54 42 26 317 -48 31 45 53 32 48 33 31 6 53 33 28 31 31 49 14 -45 0 0 20 54 33 27 317 -49 31 18 47 32 19 54 30 40 43 32 58 53 31 23 52 -44 0 0 20 54 24 28 317 -50 30 54 7 31 53 49 30 16 55 32 31 52 31 0 48 -43 0 0 20 54 14 29 317 -51 30 31 42 31 30 6 29 55 19 32 7 18 30 39 55 -42 0 0 20 54 5 30 317 -51 30 11 25 31 8 36 29 35 46 31 45 0 30 21 2 -41 0 0 20 53 55 31 317 -52 29 53 6 30 49 9 29 18 9 31 24 49 30 4 4 -40 0 0 20 53 45 32 317 -53 29 36 39 30 31 38 29 2 21 31 6 38 29 48 51 -39 0 0 20 53 34 33 317 -54 29 21 56 30 15 56 28 48 14 30 50 18 29 35 20 -38 0 0 20 53 24 34 317 -55 29 8 52 30 1 57 28 35 44 30 35 43 29 23 24 -37 0 0 20 53 13 35 317 -55 28 57 22 29 49 35 28 24 45 30 22 47 29 12 58 -36 0 0 20 53 2 35 316 -56 28 47 20 29 38 45 28 15 13 30 11 26 29 3 58 -35 0 0 20 52 51 36 316 -57 28 38 42 29 29 22 28 7 3 30 1 34 28 56 19 -34 0 0 20 52 39 37 316 -58 28 31 24 29 21 22 28 0 11 29 53 7 28 49 58 -33 0 0 20 52 28 38 315 -58 28 25 23 29 14 41 27 54 34 29 46 1 28 44 52 -32 0 0 20 52 16 39 315 -59 28 20 35 29 9 17 27 50 10 29 40 12 28 40 58 -31 0 0 20 52 4 39 315 -60 28 16 58 29 5 5 27 46 54 29 35 38 28 38 12 -30 0 0 20 51 52 40 314 -61 28 14 28 29 2 3 27 44 44 29 32 16 28 36 33 -29 0 0 20 51 40 41 314 -61 28 13 4 29 0 8 27 43 38 29 30 2 28 35 57 -28 0 0 20 51 27 42 313 -62 28 12 42 28 59 18 27 43 34 29 28 54 28 36 24 -27 0 0 20 51 15 42 312 -63 28 13 22 28 59 32 27 44 30 29 28 50 28 37 50 -26 0 0 20 51 2 43 312 -63 28 15 1 29 0 46 27 46 24 29 29 49 28 40 15 -25 0 0 20 50 49 44 311 -64 28 17 37 29 3 0 27 49 15 29 31 48 28 43 37 -24 0 0 20 50 36 44 310 -65 28 21 10 29 6 11 27 53 0 29 34 46 28 47 55 -23 0 0 20 50 23 45 310 -66 28 25 37 29 10 19 27 57 39 29 38 42 28 53 7 -22 0 0 20 50 9 46 309 -66 28 30 58 29 15 22 28 3 11 29 43 33 28 59 12 -21 0 0 20 49 56 46 308 -67 28 37 11 29 21 19 28 9 35 29 49 20 29 6 10 -20 0 0 20 49 42 47 307 -68 28 44 16 29 28 9 28 16 49 29 56 1 29 13 59 -19 0 0 20 49 28 47 306 -68 28 52 12 29 35 52 28 24 53 30 3 34 29 22 39 -18 0 0 20 49 14 48 305 -69 29 0 58 29 44 26 28 33 47 30 12 1 29 32 10 -17 0 0 20 49 0 48 304 -69 29 10 34 29 53 51 28 43 30 30 21 19 29 42 30 -16 0 0 20 48 46 49 303 -70 29 20 59 30 4 7 28 54 0 30 31 29 29 53 40 -15 0 0 20 48 32 49 302 -71 29 32 13 30 15 13 29 5 19 30 42 30 30 5 39 -14 0 0 20 48 17 50 301 -71 29 44 16 30 27 8 29 17 26 30 54 21 30 18 28 -13 0 0 20 48 3 50 300 -72 29 57 7 30 39 54 29 30 21 31 7 4 30 32 5 -12 0 0 20 47 48 50 299 -72 30 10 46 30 53 30 29 44 3 31 20 37 30 46 32 -11 0 0 20 47 33 51 297 -73 30 25 15 31 7 55 29 58 33 31 35 0 31 1 48 -10 0 0 20 47 18 51 296 -73 30 40 32 31 23 10 30 13 51 31 50 15 31 17 54 - 9 0 0 20 47 3 51 295 -73 30 56 38 31 39 16 30 29 58 32 6 20 31 34 50 - 8 0 0 20 46 48 51 294 -74 31 13 33 31 56 13 30 46 53 32 23 17 31 52 36 - 7 0 0 20 46 33 52 292 -74 31 31 19 32 14 0 31 4 37 32 41 6 32 11 14 - 6 0 0 20 46 18 52 291 -74 31 49 55 32 32 40 31 23 11 32 59 48 32 30 44 - 5 0 0 20 46 3 52 290 -75 32 9 22 32 52 12 31 42 35 33 19 24 32 51 6 - 4 0 0 20 45 47 52 288 -75 32 29 41 33 12 37 32 2 50 33 39 53 33 12 22 - 3 0 0 20 45 32 52 287 -75 32 50 53 33 33 57 32 23 58 34 1 18 33 34 33 - 2 0 0 20 45 16 52 286 -75 33 12 59 33 56 12 32 45 59 34 23 40 33 57 39 - 1 0 0 20 45 1 52 284 -75 33 36 1 34 19 25 33 8 54 34 46 59 34 21 43 0 0 0 20 44 45 52 283 -75 33 59 59 34 43 35 33 32 44 35 11 17 34 46 46 1 0 0 20 44 30 52 282 -75 34 24 55 35 8 45 33 57 32 35 36 36 35 12 50 2 0 0 20 44 14 51 280 -75 34 50 51 35 34 56 34 23 19 36 2 57 35 39 56 3 0 0 20 43 58 51 279 -75 35 17 49 36 2 11 34 50 6 36 30 24 36 8 7 4 0 0 20 43 42 51 278 -74 35 45 50 36 30 31 35 17 55 36 58 56 36 37 24 5 0 0 20 43 26 51 277 -74 36 14 57 36 59 59 35 46 50 37 28 38 37 7 51 6 0 0 20 43 11 50 275 -74 36 45 12 37 30 38 36 16 51 37 59 32 Latitude Latitude Latitude Latitude 38 0 0 7 37 39 20 42 45 50 274 -73 8 19 7 6 55 23 9 10 18 6 0 54 39 0 0 9 22 51 20 42 17 49 272 -72 10 2 21 8 42 40 10 51 11 7 51 0 40 0 0 11 1 15 20 41 50 48 270 -71 11 39 2 10 22 53 12 25 50 9 33 37 41 0 0 12 33 35 20 41 26 47 268 -70 13 9 52 11 56 47 13 54 52 11 9 37 42 0 0 14 0 26 20 41 2 46 267 -69 14 35 23 13 25 2 15 18 47 12 39 42 43 0 0 15 22 19 20 40 41 45 266 -68 15 56 4 14 48 9 16 38 2 14 4 27 44 0 0 16 39 39 20 40 20 44 265 -67 17 12 20 16 6 35 17 52 59 15 24 21 45 0 0 17 52 47 20 40 0 43 264 -66 18 24 29 17 20 43 19 3 58 16 39 49 46 0 0 19 2 2 20 39 42 42 264 -65 19 32 51 18 30 53 20 11 16 17 51 10 47 0 0 20 7 40 20 39 24 41 263 -64 20 37 42 19 37 22 21 15 7 18 58 44 48 0 0 21 9 57 20 39 7 40 263 -63 21 39 14 20 40 24 22 15 45 20 2 47 49 0 0 22 9 5 20 38 51 39 262 -62 22 37 41 21 40 14 23 13 21 21 3 31 50 0 0 23 5 15 20 38 36 38 262 -61 23 33 13 22 37 4 24 8 7 22 1 11 51 0 0 23 58 39 20 38 22 37 262 -60 24 26 1 23 31 3 25 0 12 22 55 57 52 0 0 24 49 24 20 38 8 36 262 -59 25 16 14 24 22 22 25 49 45 23 47 59 53 0 0 25 37 40 20 37 55 35 261 -59 26 4 0 25 11 9 26 36 54 24 37 27 54 0 0 26 23 35 20 37 43 34 261 -58 26 49 26 25 57 33 27 21 45 25 24 28 55 0 0 27 7 15 20 37 31 33 261 -57 27 32 40 26 41 40 28 4 26 26 9 10 56 0 0 27 48 47 20 37 20 33 262 -56 28 13 47 27 23 37 28 45 3 26 51 40 57 0 0 28 28 17 20 37 9 32 262 -55 28 52 54 28 3 31 29 23 42 27 32 4 58 0 0 29 5 51 20 36 59 31 262 -54 29 30 6 28 41 26 30 0 27 28 10 27 59 0 0 29 41 32 20 36 49 30 262 -54 30 5 27 29 17 29 30 35 23 28 46 56 60 0 0 30 15 27 20 36 40 29 262 -53 30 39 3 29 51 42 31 8 35 29 21 35 61 0 0 30 47 39 20 36 31 28 262 -52 31 10 57 30 24 12 31 40 7 29 54 28 62 0 0 31 18 12 20 36 22 27 263 -51 31 41 13 30 55 2 32 10 3 30 25 40 63 0 0 31 47 9 20 36 14 26 263 -51 32 9 55 31 24 16 32 38 25 30 55 14 64 0 0 32 14 35 20 36 7 25 263 -50 32 37 6 31 51 57 33 5 18 31 23 14 65 0 0 32 40 32 20 35 59 24 264 -49 33 2 50 32 18 8 33 30 45 31 49 43 66 0 0 33 5 4 20 35 52 24 264 -49 33 27 8 32 42 52 33 54 48 32 14 44 67 0 0 33 28 12 20 35 46 23 265 -48 33 50 5 33 6 13 34 17 29 32 38 20 68 0 0 33 50 0 20 35 39 22 265 -47 34 11 41 33 28 12 34 38 52 33 0 33 69 0 0 34 10 29 20 35 33 21 265 -47 34 32 0 33 48 51 34 58 57 33 21 27 70 0 0 34 29 42 20 35 27 20 266 -46 34 51 3 34 8 14 35 17 49 33 41 2 71 0 0 34 47 40 20 35 22 19 266 -45 35 8 53 34 26 22 35 35 27 33 59 21 72 0 0 35 4 27 20 35 16 19 267 -45 35 25 31 34 43 16 35 51 55 34 16 27 73 0 0 35 20 2 20 35 11 18 267 -44 35 40 58 34 58 59 36 7 13 34 32 19 74 0 0 35 34 27 20 35 7 17 268 -43 35 55 17 35 13 32 36 21 23 34 47 1 75 0 0 35 47 45 20 35 2 16 268 -43 36 8 28 35 26 56 36 34 26 35 0 34 76 0 0 35 59 56 20 34 58 15 269 -42 36 20 33 35 39 13 36 46 24 35 12 58 77 0 0 36 11 1 20 34 54 15 269 -41 36 31 33 35 50 23 36 57 18 35 24 15 78 0 0 36 21 2 20 34 50 14 270 -41 36 41 29 36 0 28 37 7 8 35 34 26 79 0 0 36 29 58 20 34 47 13 270 -40 36 50 22 36 9 29 37 15 56 35 43 32 80 0 0 36 37 52 20 34 43 12 271 -40 36 58 12 36 17 26 37 23 41 35 51 33 81 0 0 36 44 43 20 34 40 11 272 -39 37 5 0 36 24 20 37 30 26 35 58 31 82 0 0 36 50 32 20 34 37 11 272 -38 37 10 47 36 30 11 37 36 10 36 4 25 83 0 0 36 55 20 20 34 35 10 273 -38 37 15 33 36 35 1 37 40 54 36 9 17 84 0 0 36 59 6 20 34 32 9 273 -37 37 19 18 36 38 49 37 44 37 36 13 7 85 0 0 37 1 52 20 34 30 8 274 -37 37 22 3 36 41 35 37 47 21 36 15 54 86 0 0 37 3 37 20 34 28 7 274 -36 37 23 48 36 43 20 37 49 6 36 17 39 87 0 0 37 4 21 20 34 26 7 275 -36 37 24 32 36 44 4 37 49 51 36 18 22 88 0 0 37 4 4 20 34 24 6 276 -35 37 24 17 36 43 47 37 49 36 36 18 4 89 0 0 37 2 47 20 34 23 5 276 -34 37 23 1 36 42 27 37 48 22 36 16 43 90 0 0 37 0 28 20 34 22 4 277 -34 37 20 44 36 40 6 37 46 7 36 14 19 91 0 0 36 57 7 20 34 21 4 277 -33 37 17 25 36 36 43 37 42 53 36 10 52 92 0 0 36 52 44 20 34 20 3 278 -33 37 13 6 36 32 17 37 38 37 36 6 22 93 0 0 36 47 19 20 34 19 2 279 -32 37 7 44 36 26 47 37 33 19 36 0 47 94 0 0 36 40 49 20 34 19 1 279 -32 37 1 19 36 20 14 .. .. .. 35 54 8 95 0 0 36 33 15 20 34 19 0 280 -31 36 53 50 36 12 35 .. .. .. 35 46 22 Uncertainty in time = +/- 5 secs [Prediction of 2008 Apr 25.0] Data for the target star ------------------------ * name: TYC 1057-02086-1 * constellation : Aquila * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 19 39 40.2714 DE: +08 00 41.089 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .020, .019 ) * V mag [mag]: 8.6 * B mag [mag]: 8.7 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (480) Hansa approx. diameter [km]: 59 approx. diameter ["]: .041 distance from Earth [AU]: 1.99900 * orbital information: orbit source: Preston date of fit: 2008 Apr 25 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 918 number of rejected observations: 85 time covered by the observations: 1901 May 22 - 2008 Apr 08 1 sigma uncertainty ellipse (major, minor, PA): 0.018, 0.011, 66° remarks: * orbital elements for (480) Hansa : Mean anomaly = 230.51762218 deg Arg. of pericenter = 212.05095468 deg Long. of node = 237.34274392 deg Inclination = 21.27844136 deg Eccentricity = 0.04535749 Semimajor axis = 2.64580386 AU Perihelion dist = 2.52579683 AU Mag: H = 8.16, G = 0.15 Epoch of elements : MJD 55081.86500000 TDT (2009 Sep 07.865) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Sep 7 480 Hansa 20h 45.5m UT 8.6 19 39 40.271 8 0 41.09TYC 1057-02086-1 8.7 13.0 59 7.9 1.999 -0.323 -17.90 -3.5137 8.016 -131.91 5.77 20.7582 0.59622 -0.16084 -1.09484 -4.06856 0.00435 -0.00106 2000 230.0905052009 9 6.00000212.050955237.342744 21.2784410.04535749 2.6458039 2.5257968 8.4 5.00.15 RATE 2.2901700 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.027 0.022 79 1.63 0.026 0 54581.5020090907_2086-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Apr 25, 08:24 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org