IOTA/IOTA-ES occultation update for (526) Jena / TYC 1374-01792-1 event on 2008 May 17, 04:48 UT Visible from USA, SW Canada Summary ------- On 2008 May 17 UT, the 42 km diameter asteroid (526) Jena will occult a 10.0 mag star in the constellation Gemini for observers along a path across USA, SW Canada. In the case of an occultation, the combined light of the asteroid and the star will drop by 5.7 mag to 15.7 mag (the magnitude of the asteroid) for at most 1.2 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: 63 * date and approx. time of event: 2008 May 17, 04:50 - 2008 May 17, 04:51 UT * midpoint of event [JD]: 2454603.70076667 * magnitude of target star: 10.0 * magnitude drop [mag]: 5.7 * estimated maximum duration [s]: 1.2 * Moon: 93 % sunlit, 90° distance * Sun: 58° distance * rough path description: USA, SW Canada The occultation path -------------------- * approximate projected width [km]: 63 * 1 sigma uncertainty interval [path widths]: +/- 0.97 * 1 sigma uncertainty interval [seconds]: +/- 1.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .021 +/- .019) * 1 sigma uncertainty ellipse (major, minor, PA): ( .021", .018", 94° ) * approx speed of asteroid's shadow [km/s]: 33.6682 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1374-01792-1 by 526 Jena on 2008 May 17 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 56 38 20 4 50 16 34 257 0 56 17 28 56 59 23 55 37 27 57 40 44 -130 0 0 56 14 33 4 50 18 33 258 -1 55 53 40 56 35 38 55 13 36 57 17 1 -129 0 0 55 50 28 4 50 20 33 259 -2 55 29 34 56 11 34 54 49 28 56 52 59 -128 0 0 55 26 5 4 50 22 32 261 -2 55 5 10 55 47 11 54 25 3 56 28 39 -127 0 0 55 1 25 4 50 24 32 262 -3 54 40 28 55 22 32 54 0 20 56 4 1 -126 0 0 54 36 27 4 50 26 31 263 -4 54 15 31 54 57 35 53 35 21 55 39 5 -125 0 0 54 11 14 4 50 28 31 264 -4 53 50 17 54 32 21 53 10 7 55 13 52 -124 0 0 53 45 44 4 50 29 30 265 -5 53 24 47 54 6 52 52 44 37 54 48 23 -123 0 0 53 20 0 4 50 31 29 266 -6 52 59 3 53 41 7 52 18 53 54 22 38 -122 0 0 52 54 1 4 50 33 29 267 -7 52 33 5 53 15 8 51 52 56 53 56 38 -121 0 0 52 27 49 4 50 35 28 268 -7 52 6 53 52 48 56 51 26 45 53 30 24 -120 0 0 52 1 24 4 50 37 28 269 -8 51 40 28 52 22 30 51 0 22 53 3 57 -119 0 0 51 34 47 4 50 38 27 270 -9 51 13 52 51 55 52 50 33 47 52 37 17 -118 0 0 51 7 58 4 50 40 26 271 -10 50 47 5 51 29 2 50 7 2 52 10 25 -117 0 0 50 40 59 4 50 42 26 272 -10 50 20 7 51 2 2 49 40 7 51 43 22 -116 0 0 50 13 51 4 50 43 25 273 -11 49 53 1 50 34 52 49 13 3 51 16 9 -115 0 0 49 46 34 4 50 45 24 274 -12 49 25 45 50 7 33 48 45 51 50 48 47 -114 0 0 49 19 9 4 50 47 24 275 -13 48 58 22 49 40 6 48 18 31 50 21 16 -113 0 0 48 51 37 4 50 48 23 276 -13 48 30 52 49 12 33 47 51 5 49 53 38 -112 0 0 48 24 0 4 50 50 22 277 -14 48 3 17 48 44 53 47 23 34 49 25 54 -111 0 0 47 56 17 4 50 51 22 278 -15 47 35 37 48 17 7 46 55 58 48 58 4 -110 0 0 47 28 30 4 50 53 21 279 -16 47 7 52 47 49 18 46 28 19 48 30 9 -109 0 0 47 0 40 4 50 54 20 280 -16 46 40 5 47 21 26 46 0 36 48 2 11 -108 0 0 46 32 48 4 50 56 19 280 -17 46 12 16 46 53 31 45 32 53 47 34 10 -107 0 0 46 4 55 4 50 57 19 281 -18 45 44 26 46 25 35 45 5 8 47 6 8 -106 0 0 45 37 2 4 50 58 18 282 -19 45 16 36 45 57 38 44 37 24 46 38 5 -105 0 0 45 9 10 4 51 0 17 283 -20 44 48 47 45 29 43 44 9 41 46 10 3 -104 0 0 44 41 20 4 51 1 16 284 -20 44 21 0 45 1 49 43 42 0 45 42 3 -103 0 0 44 13 32 4 51 2 15 285 -21 43 53 16 44 33 58 43 14 23 45 14 4 -102 0 0 43 45 48 4 51 3 15 285 -22 43 25 36 44 6 11 42 46 49 44 46 10 -101 0 0 43 18 9 4 51 4 14 286 -23 42 58 0 43 38 28 42 19 21 44 18 20 -100 0 0 42 50 36 4 51 5 13 287 -23 42 30 31 43 10 51 41 51 58 43 50 35 - 99 0 0 42 23 10 4 51 6 12 287 -24 42 3 9 42 43 21 41 24 43 43 22 57 - 98 0 0 41 55 51 4 51 7 11 288 -25 41 35 54 42 15 58 40 57 36 42 55 26 - 97 0 0 41 28 42 4 51 8 10 289 -26 41 8 48 41 48 44 40 30 37 42 28 4 - 96 0 0 41 1 41 4 51 9 10 290 -26 40 41 52 41 21 40 40 3 48 42 0 52 - 95 0 0 40 34 51 4 51 9 9 290 -27 40 15 6 40 54 46 39 37 10 41 33 49 - 94 0 0 40 8 13 4 51 10 8 291 -28 39 48 31 40 28 3 39 10 43 41 6 58 - 93 0 0 39 41 47 4 51 11 7 292 -28 39 22 10 40 1 33 38 44 29 40 40 20 - 92 0 0 39 15 34 4 51 11 6 292 -29 38 56 1 39 35 16 38 18 28 40 13 54 - 91 0 0 38 49 35 4 51 11 5 293 -30 38 30 6 39 9 13 37 52 42 39 47 42 - 90 0 0 38 23 51 4 51 12 4 294 -30 38 4 26 38 43 24 .. .. .. 39 21 45 - 89 0 0 37 58 23 4 51 12 3 294 -31 37 39 2 38 17 52 .. .. .. 38 56 4 - 88 0 0 37 33 11 4 51 12 2 295 -32 37 13 54 37 52 35 .. .. .. 38 30 39 - 87 0 0 37 8 16 4 51 13 2 295 -32 36 49 4 37 27 36 .. .. .. 38 5 31 - 86 0 0 36 43 39 4 51 13 1 296 -33 36 24 31 37 2 55 .. .. .. 37 40 42 Uncertainty in time = +/- 1 secs [Prediction of 2008 Apr 13.0] Data for the target star ------------------------ * name: TYC 1374-01792-1 * constellation : Gemini * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 07 45 19.4988 DE: +21 04 13.429 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .015, .016 ) * V mag [mag]: 10.0 * B mag [mag]: 10.1 * Apparent position with proper motion RA(deg): 116.4544797797 DE(deg): 21.0515242782 * Equation of equinoxes (radians) : 0.000039619356634 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (526) Jena approx. diameter [km]: 42 approx. diameter ["]: .019 distance from Earth [AU]: 3.08300 * orbital information: orbit source: Preston date of fit: 2008 Feb 16 source of used astrometry: FASTT TMO MPC (via Astdys) number of used observations: 1029 number of rejected observations: 103 time covered by the observations: 1904 Mar 15 - 2008 Jan 31 1 sigma uncertainty ellipse (major, minor, PA): 0.015, 0.010, 98° remarks: * orbital elements for (526) Jena : Mean anomaly = 357.32028222 deg Arg. of pericenter = 358.70784472 deg Long. of node = 137.92008335 deg Inclination = 2.17167043 deg Eccentricity = 0.13874805 Semimajor axis = 3.11814537 AU Perihelion dist = 2.68550879 AU Mag: H = 10.05, G = 0.15 Epoch of elements : MJD 54603.20100000 TDT (2008 May 17.201) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 May 17 526 Jena 4h 49.1m UT 10.0 7 45 19.499 21 4 13.43TYC 1374-01792-1 10.1 15.7 42 1.2 3.083 3.827 -8.32 168.7925 21.073 106.83 19.41 4.8184 0.11348 0.73499 18.77821 -2.91596 0.00462 -0.00083 2000 356.7472942008 514.00000358.707845137.920083 2.1716700.13874805 3.1181454 2.685508810.2 5.00.15 RATE 1.7900270 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.021 0.018 94 1.97 0.019 0 54569.5020080517_1792-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Apr 13, 02:56 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org