IOTA/IOTA-ES occultation update for (1127) Mimi / TYC 1323-00121-1 event on 2008 May 07, 21:13 UT Visible from UK, Europe Summary ------- On 2008 May 07 UT, the 47 km diameter asteroid (1127) Mimi will occult a 10.9 mag star in the constellation Orion for observers along a path across UK, Europe. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.9 mag to 15.8 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: 73 * date and approx. time of event: 2008 May 07, 21:15 - 2008 May 07, 21:15 UT * midpoint of event [JD]: 2454594.38458333 * magnitude of target star: 10.9 * magnitude drop [mag]: 4.9 * estimated maximum duration [s]: 1.1 * Moon: 9 % sunlit, 16° distance * Sun: 47° distance * rough path description: UK, Europe The occultation path -------------------- * approximate projected width [km]: 62 * 1 sigma uncertainty interval [path widths]: +/- 0.79 * 1 sigma uncertainty interval [seconds]: +/- 1.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .022 +/- .019) * 1 sigma uncertainty ellipse (major, minor, PA): ( .022", .019", 82° ) * approx speed of asteroid's shadow [km/s]: 41.4566 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1323-00121-1 by 1127 Mimi on 2008 May 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 ' " Latitude Latitude Latitude Latitude - 21 0 0 57 3 2 21 15 18 28 264 0 56 44 54 57 21 15 56 16 26 57 50 14 - 20 0 0 56 49 31 21 15 19 28 265 -1 56 31 20 57 7 47 56 2 48 57 36 50 - 19 0 0 56 35 42 21 15 20 27 266 -1 56 17 29 56 54 1 55 48 52 57 23 8 - 18 0 0 56 21 35 21 15 21 27 267 -2 56 3 19 56 39 56 55 34 39 57 9 8 - 17 0 0 56 7 10 21 15 22 26 268 -3 55 48 51 56 25 34 55 20 7 56 54 49 - 16 0 0 55 52 26 21 15 23 26 269 -3 55 34 6 56 10 53 55 5 17 56 40 13 - 15 0 0 55 37 25 21 15 24 25 270 -4 55 19 2 55 55 54 54 50 9 56 25 18 - 14 0 0 55 22 6 21 15 25 25 271 -4 55 3 40 55 40 37 54 34 43 56 10 5 - 13 0 0 55 6 28 21 15 26 24 272 -5 54 48 0 55 25 2 54 18 59 55 54 34 - 12 0 0 54 50 32 21 15 27 23 273 -6 54 32 1 55 9 9 54 2 57 55 38 45 - 11 0 0 54 34 19 21 15 28 23 274 -6 54 15 45 54 52 58 53 46 37 55 22 38 - 10 0 0 54 17 47 21 15 28 22 274 -7 53 59 11 54 36 28 53 29 59 55 6 12 - 9 0 0 54 0 57 21 15 29 22 275 -7 53 42 19 54 19 41 53 13 4 54 49 29 - 8 0 0 53 43 49 21 15 30 21 276 -8 53 25 9 54 2 35 52 55 50 54 32 27 - 7 0 0 53 26 24 21 15 31 20 277 -9 53 7 41 53 45 12 52 38 19 54 15 8 - 6 0 0 53 8 40 21 15 32 20 278 -9 52 49 55 53 27 31 52 20 30 53 57 30 - 5 0 0 52 50 39 21 15 33 19 279 -10 52 31 52 53 9 32 52 2 24 53 39 35 - 4 0 0 52 32 21 21 15 33 18 280 -11 52 13 32 52 51 16 51 44 0 53 21 22 - 3 0 0 52 13 45 21 15 34 18 281 -11 51 54 54 52 32 43 51 25 19 53 2 52 - 2 0 0 51 54 52 21 15 35 17 281 -12 51 35 59 52 13 52 51 6 21 52 44 4 - 1 0 0 51 35 43 21 15 36 16 282 -13 51 16 48 51 54 44 50 47 6 52 24 59 0 0 0 51 16 16 21 15 36 16 283 -13 50 57 19 51 35 19 50 27 35 52 5 37 1 0 0 50 56 33 21 15 37 15 284 -14 50 37 34 51 15 37 50 7 47 51 45 59 2 0 0 50 36 33 21 15 38 14 285 -15 50 17 33 50 55 39 49 47 44 51 26 4 3 0 0 50 16 17 21 15 38 14 286 -15 49 57 16 50 35 25 49 27 24 51 5 52 4 0 0 49 55 46 21 15 39 13 286 -16 49 36 43 50 14 55 49 6 49 50 45 25 5 0 0 49 34 59 21 15 39 12 287 -17 49 15 54 49 54 10 48 45 58 50 24 41 6 0 0 49 13 57 21 15 40 11 288 -17 48 54 51 49 33 9 48 24 53 50 3 43 7 0 0 48 52 40 21 15 41 11 289 -18 48 33 33 49 11 53 48 3 33 49 42 29 8 0 0 48 31 8 21 15 41 10 290 -19 48 12 0 48 50 23 47 41 59 49 21 0 9 0 0 48 9 23 21 15 41 9 290 -19 47 50 14 48 28 38 47 20 10 48 59 17 10 0 0 47 47 24 21 15 42 8 291 -20 47 28 14 48 6 40 46 58 9 48 37 21 11 0 0 47 25 11 21 15 42 8 292 -20 47 6 0 47 44 28 46 35 54 48 15 10 12 0 0 47 2 46 21 15 43 7 293 -21 46 43 34 47 22 4 46 13 27 47 52 47 13 0 0 46 40 8 21 15 43 6 293 -22 46 20 56 46 59 27 45 50 48 47 30 10 14 0 0 46 17 18 21 15 43 5 294 -22 45 58 6 46 36 37 45 27 57 47 7 22 15 0 0 45 54 17 21 15 44 5 295 -23 45 35 4 46 13 37 45 4 55 46 44 22 16 0 0 45 31 5 21 15 44 4 295 -24 45 11 52 45 50 25 44 41 42 46 21 11 17 0 0 45 7 43 21 15 44 3 296 -24 44 48 30 45 27 3 44 18 20 45 57 49 18 0 0 44 44 11 21 15 44 2 297 -25 44 24 57 45 3 31 .. .. .. 45 34 17 19 0 0 44 20 30 21 15 44 1 298 -26 44 1 16 44 39 49 .. .. .. 45 10 35 20 0 0 43 56 40 21 15 44 1 298 -26 43 37 26 44 15 59 .. .. .. 44 46 45 Uncertainty in time = +/- 1 secs [Prediction of 2008 Mar 31.0] Data for the target star ------------------------ * name: TYC 1323-00121-1 * constellation : Orion * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 06 19 20.4005 DE: +20 26 11.287 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .016, .017 ) * V mag [mag]: 10.9 * B mag [mag]: 10.7 * Apparent position with proper motion RA(deg): 94.9578473399 DE(deg): 20.4343285350 * Equation of equinoxes (radians) : 0.000039214510316 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1127) Mimi approx. diameter [km]: 47 approx. diameter ["]: .024 distance from Earth [AU]: 2.71600 * orbital information: orbit source: Preston date of fit: 2008 Feb 16 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 576 number of rejected observations: 49 time covered by the observations: 1933 Jan 25 - 2008 Feb 08 1 sigma uncertainty ellipse (major, minor, PA): 0.016, 0.008, 74° remarks: * orbital elements for (1127) Mimi : Mean anomaly = 38.83740445 deg Arg. of pericenter = 281.89058448 deg Long. of node = 128.71416887 deg Inclination = 14.75273305 deg Eccentricity = 0.26447931 Semimajor axis = 2.59497291 AU Perihelion dist = 1.90865626 AU Mag: H = 10.59, G = 0.15 Epoch of elements : MJD 54593.88500000 TDT (2008 May 07.885) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 May 7 1127 Mimi 21h 13.8m UT 10.9 6 19 20.400 20 26 11.29TYC 1323-00121-1 10.7 15.8 47 1.1 2.716 5.357 8.38 -89.6958 20.435 -139.32 17.10 21.2300 -0.07307 0.64976 23.25551 2.58982 0.00388 -0.00032 2000 37.9214032008 5 4.00000281.890584128.714169 14.7527330.26447931 2.5949729 1.908656311.0 5.00.15 RATE 2.3577890 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.022 0.019 82 1.79 0.019 0 54556.5020080507_0121-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 31, 04:12 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org