IOTA/IOTA-ES occultation update for (2502) Nummela / TYC 3372-00277-1 event on 2012 Dec 21, 04:05 UT Visible from Caribbean, Central America Summary ------- On 2012 Dec 21 UT, the 17 km diameter asteroid (2502) Nummela will occult a 8.8 mag star in the constellation Auriga for observers along a path across Caribbean, Central America. In the case of an occultation, the combined light of the asteroid and the star will drop by 6.5 mag to 15.3 mag (the magnitude of the asteroid) for at most 1.6 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: . The event at a glimpse ---------------------- * Rank: 17 * date and approx. time of event: 2012 Dec 21, 03:56 - 2012 Dec 21, 04:13 UT * geocentric midpoint of event [JD]: 2456282.67005833 * magnitude of target star: 8.8 * magnitude drop [mag]: 6.5 * estimated maximum duration [s]: 1.6 * Moon: 59 % sunlit, 77° distance * Sun: 152° distance * rough path description: Caribbean, Central America The occultation path -------------------- * approximate projected width [km]: 20 * 1 sigma uncertainty interval [path widths]: +/- 4.01 * 1 sigma uncertainty interval [seconds]: +/- 5.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .073 +/- .060) * 1 sigma uncertainty ellipse (major, minor, PA): ( .073", .059", 82° ) * approx speed of asteroid's shadow [km/s]: 10.5187 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 3372-00277-1 by 2502 Nummela on 2012 Dec 21 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 - 8 21 21 -25 0 0 3 56 30 1 330 -21 - 8 14 8 - 8 28 35 ... .. .. - 9 26 47 - 9 0 46 -24 0 0 3 56 30 2 330 -22 - 8 53 34 - 9 7 59 ... .. .. - 10 6 4 - 9 40 45 -23 0 0 3 56 31 3 330 -23 - 9 33 34 - 9 47 57 ... .. .. - 10 45 58 - 10 21 20 -22 0 0 3 56 31 4 330 -24 - 10 14 9 - 10 28 32 ... .. .. - 11 26 30 - 11 2 33 -21 0 0 3 56 33 5 331 -25 - 10 55 22 - 11 9 45 ... .. .. - 12 7 43 - 11 44 27 -20 0 0 3 56 34 6 331 -26 - 11 37 16 - 11 51 38 - 10 39 56 - 12 49 38 - 12 27 3 -19 0 0 3 56 36 8 331 -27 - 12 19 51 - 12 34 15 - 11 22 28 - 13 32 19 - 13 10 24 -18 0 0 3 56 38 9 331 -29 - 13 3 12 - 13 17 37 - 12 5 44 - 14 15 47 - 13 54 32 -17 0 0 3 56 41 10 332 -30 - 13 47 19 - 14 1 46 - 12 49 44 - 15 0 5 - 14 39 31 -16 0 0 3 56 43 11 332 -31 - 14 32 16 - 14 46 46 - 13 34 31 - 15 45 16 - 15 25 22 -15 0 0 3 56 47 12 332 -32 - 15 18 6 - 15 32 39 - 14 20 9 - 16 31 23 - 16 12 9 -14 0 0 3 56 50 14 332 -33 - 16 4 51 - 16 19 28 - 15 6 40 - 17 18 28 - 16 59 55 -13 0 0 3 56 54 15 333 -35 - 16 52 35 - 17 7 16 - 15 54 6 - 18 6 36 - 17 48 44 -12 0 0 3 56 58 16 333 -36 - 17 41 21 - 17 56 8 - 16 42 32 - 18 55 49 - 18 38 39 -11 0 0 3 57 3 17 333 -37 - 18 31 13 - 18 46 5 - 17 32 1 - 19 46 12 - 19 29 44 -10 0 0 3 57 8 19 333 -38 - 19 22 14 - 19 37 13 - 18 22 37 - 20 37 48 - 20 22 3 - 9 0 0 3 57 14 20 334 -40 - 20 14 30 - 20 29 36 - 19 14 23 - 21 30 43 - 21 15 41 - 8 0 0 3 57 20 21 334 -41 - 21 8 3 - 21 23 19 - 20 7 24 - 22 25 1 - 22 10 43 - 7 0 0 3 57 26 22 334 -42 - 22 3 1 - 22 18 25 - 21 1 45 - 23 20 47 - 23 7 14 - 6 0 0 3 57 33 24 334 -44 - 22 59 27 - 23 15 2 - 21 57 31 - 24 18 8 - 24 5 22 - 5 0 0 3 57 40 25 335 -45 - 23 57 29 - 24 13 16 - 22 54 48 - 25 17 10 - 25 5 11 - 4 0 0 3 57 47 26 335 -46 - 24 57 12 - 25 13 12 - 23 53 41 - 26 18 1 - 26 6 51 - 3 0 0 3 57 56 28 335 -48 - 25 58 44 - 26 14 59 - 24 54 19 - 27 20 47 - 27 10 29 - 2 0 0 3 58 4 29 336 -49 - 27 2 14 - 27 18 44 - 25 56 48 - 28 25 40 - 28 16 14 - 1 0 0 3 58 13 30 336 -51 - 28 7 51 - 28 24 38 - 27 1 17 - 29 32 47 - 29 24 17 0 0 0 3 58 23 32 336 -52 - 29 15 44 - 29 32 51 - 28 7 55 - 30 42 22 - 30 34 50 1 0 0 3 58 33 33 337 -54 - 30 26 6 - 30 43 35 - 29 16 54 - 31 54 38 Latitude Latitude Latitude Latitude - 32 0 0 2 9 32 3 58 46 35 337 -55 2 16 41 2 2 22 3 13 37 1 4 22 - 33 0 0 2 56 38 3 58 55 36 337 -57 3 3 42 2 49 34 3 59 56 1 52 18 - 34 0 0 3 42 15 3 59 4 37 338 -58 3 49 14 3 35 15 4 44 47 2 38 42 - 35 0 0 4 26 23 3 59 14 38 338 -59 4 33 17 4 19 28 5 28 12 3 23 36 - 36 0 0 5 9 4 3 59 23 39 339 -60 5 15 53 5 2 14 6 10 12 4 7 0 - 37 0 0 5 50 20 3 59 33 40 339 -61 5 57 5 5 43 34 6 50 48 4 48 58 - 38 0 0 6 30 13 3 59 42 41 340 -63 6 36 53 6 23 31 7 30 3 5 29 30 - 39 0 0 7 8 44 3 59 52 42 340 -64 7 15 20 7 2 7 8 7 58 6 8 39 - 40 0 0 7 45 55 4 0 1 43 341 -65 7 52 27 7 39 22 8 44 34 6 46 27 - 41 0 0 8 21 48 4 0 11 44 341 -66 8 28 16 8 15 18 9 19 53 7 22 55 - 42 0 0 8 56 24 4 0 21 44 342 -67 9 2 49 8 49 58 9 53 57 7 58 4 - 43 0 0 9 29 44 4 0 31 45 342 -68 9 36 6 9 23 22 10 26 47 8 31 56 - 44 0 0 10 1 51 4 0 41 46 343 -69 10 8 9 9 55 32 10 58 25 9 4 33 - 45 0 0 10 32 45 4 0 51 47 343 -70 10 39 0 10 26 29 11 28 51 9 35 56 - 46 0 0 11 2 27 4 1 1 47 344 -71 11 8 40 10 56 15 11 58 7 10 6 6 - 47 0 0 11 31 0 4 1 10 48 345 -72 11 37 9 11 24 50 12 26 14 10 35 5 - 48 0 0 11 58 24 4 1 20 49 345 -73 12 4 30 11 52 17 12 53 14 11 2 54 - 49 0 0 12 24 40 4 1 30 50 346 -74 12 30 44 12 18 36 13 19 7 11 29 35 - 50 0 0 12 49 50 4 1 40 50 347 -75 12 55 51 12 43 48 13 43 54 11 55 7 - 51 0 0 13 13 54 4 1 50 51 348 -76 13 19 53 13 7 55 14 7 38 12 19 34 - 52 0 0 13 36 54 4 2 0 51 349 -77 13 42 51 13 30 57 14 30 18 12 42 54 - 53 0 0 13 58 51 4 2 10 52 349 -78 14 4 46 13 52 56 14 51 56 13 5 11 - 54 0 0 14 19 45 4 2 20 52 350 -79 14 25 38 14 13 52 15 12 32 13 26 24 - 55 0 0 14 39 38 4 2 30 53 351 -79 14 45 29 14 33 47 15 32 8 13 46 34 - 56 0 0 14 58 30 4 2 40 53 352 -80 15 4 19 14 52 41 15 50 44 14 5 43 - 57 0 0 15 16 23 4 2 50 54 353 -81 15 22 10 15 10 35 16 8 21 14 23 51 - 58 0 0 15 33 16 4 3 0 54 354 -81 15 39 2 15 27 30 16 25 0 14 40 59 - 59 0 0 15 49 11 4 3 10 54 355 -82 15 54 55 15 43 26 16 40 41 14 57 8 - 60 0 0 16 4 8 4 3 20 55 356 -82 16 9 51 15 58 25 16 55 26 15 12 18 - 61 0 0 16 18 8 4 3 30 55 357 -83 16 23 50 16 12 26 17 9 14 15 26 30 - 62 0 0 16 31 12 4 3 40 55 358 -83 16 36 52 16 25 31 17 22 7 15 39 45 - 63 0 0 16 43 20 4 3 50 55 359 -83 16 48 59 16 37 40 17 34 5 15 52 3 - 64 0 0 16 54 32 4 3 59 56 0 -83 17 0 10 16 48 54 17 45 8 16 3 26 - 65 0 0 17 4 50 4 4 9 56 1 -83 17 10 27 16 59 12 17 55 17 16 13 52 - 66 0 0 17 14 13 4 4 19 56 2 -82 17 19 49 17 8 36 18 4 32 16 23 23 - 67 0 0 17 22 42 4 4 29 56 3 -82 17 28 17 17 17 6 18 12 55 16 31 59 - 68 0 0 17 30 17 4 4 39 56 4 -81 17 35 52 17 24 42 18 20 24 16 39 41 - 69 0 0 17 36 59 4 4 48 56 6 -81 17 42 33 17 31 25 18 27 0 16 46 28 - 70 0 0 17 42 48 4 4 58 56 7 -80 17 48 21 17 37 14 18 32 44 16 52 22 - 71 0 0 17 47 44 4 5 8 56 8 -80 17 53 17 17 42 10 18 37 36 16 57 22 - 72 0 0 17 51 47 4 5 17 56 9 -79 17 57 20 17 46 14 18 41 36 17 1 28 - 73 0 0 17 54 57 4 5 27 56 10 -78 18 0 30 17 49 25 18 44 44 17 4 42 - 74 0 0 17 57 16 4 5 37 56 11 -77 18 2 48 17 51 43 18 47 0 17 7 2 - 75 0 0 17 58 41 4 5 46 56 12 -76 18 4 14 17 53 9 18 48 25 17 8 29 - 76 0 0 17 59 15 4 5 56 55 13 -76 18 4 47 17 53 43 18 48 58 17 9 3 - 77 0 0 17 58 56 4 6 6 55 14 -75 18 4 29 17 53 24 18 48 40 17 8 43 - 78 0 0 17 57 45 4 6 15 55 15 -74 18 3 18 17 52 13 18 47 30 17 7 31 - 79 0 0 17 55 42 4 6 25 55 16 -73 18 1 15 17 50 9 18 45 29 17 5 26 - 80 0 0 17 52 46 4 6 34 54 17 -72 17 58 19 17 47 13 18 42 35 17 2 28 - 81 0 0 17 48 58 4 6 44 54 18 -71 17 54 31 17 43 24 18 38 50 16 58 36 - 82 0 0 17 44 17 4 6 53 54 18 -71 17 49 50 17 38 43 18 34 13 16 53 50 - 83 0 0 17 38 42 4 7 3 53 19 -70 17 44 17 17 33 8 18 28 44 16 48 11 - 84 0 0 17 32 15 4 7 12 53 20 -69 17 37 50 17 26 40 18 22 22 16 41 38 - 85 0 0 17 24 54 4 7 21 53 21 -68 17 30 29 17 19 18 18 15 7 16 34 10 - 86 0 0 17 16 39 4 7 31 52 22 -67 17 22 15 17 11 2 18 6 59 16 25 48 - 87 0 0 17 7 29 4 7 40 52 22 -66 17 13 7 17 1 52 17 57 58 16 16 30 - 88 0 0 16 57 25 4 7 49 51 23 -65 17 3 4 16 51 47 17 48 2 16 6 18 - 89 0 0 16 46 26 4 7 59 51 24 -64 16 52 5 16 40 47 17 37 12 15 55 9 - 90 0 0 16 34 31 4 8 8 50 24 -63 16 40 12 16 28 50 17 25 28 15 43 3 - 91 0 0 16 21 40 4 8 17 49 25 -62 16 27 22 16 15 58 17 12 48 15 30 1 - 92 0 0 16 7 52 4 8 26 49 26 -61 16 13 35 16 2 9 16 59 12 15 16 0 - 93 0 0 15 53 7 4 8 35 48 26 -60 15 58 51 15 47 22 16 44 39 15 1 2 - 94 0 0 15 37 23 4 8 44 48 27 -59 15 43 9 15 31 37 16 29 9 14 45 4 - 95 0 0 15 20 41 4 8 53 47 27 -58 15 26 29 15 14 53 16 12 41 14 28 7 - 96 0 0 15 2 59 4 9 2 46 28 -58 15 8 48 14 57 9 15 55 15 14 10 9 - 97 0 0 14 44 17 4 9 11 45 28 -57 14 50 8 14 38 25 15 36 49 13 51 10 - 98 0 0 14 24 33 4 9 20 45 29 -56 14 30 26 14 18 40 15 17 23 13 31 8 - 99 0 0 14 3 47 4 9 29 44 29 -55 14 9 43 13 57 52 14 56 55 13 10 3 -100 0 0 13 41 58 4 9 38 43 29 -54 13 47 56 13 36 1 14 35 26 12 47 54 -101 0 0 13 19 5 4 9 47 42 30 -53 13 25 5 13 13 5 14 12 53 12 24 40 -102 0 0 12 55 7 4 9 55 42 30 -52 13 1 9 12 49 5 13 49 16 12 0 20 -103 0 0 12 30 3 4 10 4 41 30 -50 12 36 7 12 23 58 13 24 34 11 34 52 -104 0 0 12 3 51 4 10 13 40 31 -49 12 9 58 11 57 43 12 58 46 11 8 15 -105 0 0 11 36 30 4 10 21 39 31 -48 11 42 40 11 30 20 12 31 51 10 40 29 -106 0 0 11 8 0 4 10 30 38 31 -47 11 14 13 11 1 46 12 3 46 10 11 32 -107 0 0 10 38 18 4 10 38 37 31 -46 10 44 34 10 32 2 11 34 32 9 41 22 -108 0 0 10 7 24 4 10 46 36 32 -45 10 13 43 10 1 4 11 4 6 9 9 58 -109 0 0 9 35 16 4 10 54 35 32 -44 9 41 38 9 28 53 10 32 28 8 37 18 -110 0 0 9 1 52 4 11 2 34 32 -43 9 8 18 8 55 25 9 59 36 8 3 22 -111 0 0 8 27 11 4 11 10 33 32 -42 8 33 41 8 20 41 9 25 28 7 28 7 -112 0 0 7 51 12 4 11 18 32 32 -41 7 57 46 7 44 38 8 50 3 6 51 32 -113 0 0 7 13 52 4 11 26 31 33 -40 7 20 30 7 7 14 8 13 19 6 13 35 -114 0 0 6 35 11 4 11 33 30 33 -39 6 41 53 6 28 28 7 35 15 5 34 14 -115 0 0 5 55 6 4 11 41 29 33 -37 6 1 52 5 48 18 6 55 49 4 53 28 -116 0 0 5 13 35 4 11 48 28 33 -36 5 20 26 5 6 43 6 14 59 4 11 14 -117 0 0 4 30 37 4 11 55 27 33 -35 4 37 33 4 23 40 5 32 44 3 27 31 -118 0 0 3 46 9 4 12 2 26 33 -34 3 53 10 3 39 7 4 49 1 2 42 16 -119 0 0 3 0 11 4 12 9 25 34 -33 3 7 17 2 53 3 4 3 49 1 55 28 -120 0 0 2 12 38 4 12 15 23 34 -31 2 19 50 2 5 26 3 17 6 1 7 5 -121 0 0 1 23 31 4 12 21 22 34 -30 1 30 49 1 16 12 2 28 50 0 17 3 -122 0 0 0 32 46 4 12 27 21 34 -29 0 40 10 0 25 21 1 38 59 - 0 34 38 -123 0 0 - 0 19 38 4 12 33 20 34 -28 - 0 12 8 - 0 27 10 0 47 30 - 1 28 2 -124 0 0 - 1 13 45 4 12 39 18 34 -26 - 1 6 8 - 1 21 23 - 0 5 38 - 2 23 10 -125 0 0 - 2 9 35 4 12 44 17 34 -25 - 2 1 51 - 2 17 20 - 1 0 27 - 3 20 6 -126 0 0 - 3 7 12 4 12 49 16 34 -24 - 2 59 21 - 3 15 4 - 1 56 59 - 4 18 50 -127 0 0 - 4 6 37 4 12 54 14 34 -23 - 3 58 38 - 4 14 37 - 2 55 17 - 5 19 27 -128 0 0 - 5 7 52 4 12 58 13 35 -21 - 4 59 45 - 5 16 0 - 3 55 22 - 6 21 57 -129 0 0 - 6 11 1 4 13 2 12 35 -20 - 6 2 46 - 6 19 17 - 4 57 17 - 7 26 24 -130 0 0 - 7 16 4 4 13 5 10 35 -18 - 7 7 40 - 7 24 30 - 6 1 4 - 8 32 51 -131 0 0 - 8 23 5 4 13 8 9 35 -17 - 8 14 32 - 8 31 40 - 7 6 43 - 9 41 18 -132 0 0 - 9 32 5 4 13 11 7 35 -16 - 9 23 22 - 9 40 49 - 8 14 19 -10 51 49 -133 0 0 -10 43 6 4 13 13 6 35 -14 -10 34 13 -10 52 0 - 9 23 51 -12 4 25 -134 0 0 -11 56 9 4 13 15 4 36 -13 -11 47 6 -12 5 15 .. .. .. -13 19 10 -135 0 0 -13 11 18 4 13 16 3 36 -11 -13 2 3 -13 20 34 .. .. .. -14 36 4 -136 0 0 -14 28 32 4 13 17 1 36 -10 -14 19 5 -14 38 1 .. .. .. .. .. .. Uncertainty in time = +/- 8 secs Prediction of 2012 Dec 17.0 Data for the target star ------------------------ * name: TYC 3372-00277-1 * constellation : Auriga * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 05 47 47.3822 DE: +51 05 58.571 * position source: mpos:TYC pm:TYC * standard error: RA,DE ["]: ( .029, .030 ) * V mag [mag]: 8.8 * B mag [mag]: 10.3 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2502) Nummela approx. diameter [km]: 17 approx. diameter ["]: .015 distance from Earth [AU]: 1.57300 * orbital information: orbit source: Preston date of fit: 2012 Dec 16 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 704 number of rejected observations: 21 time covered by the observations: 1933 Apr 20 - 2012 Dec 13 1 sigma uncertainty ellipse (major, minor, PA): 0.067, 0.051, 80° remarks: * orbital elements for (2502) Nummela : Mean anomaly = 323.41419560 deg Arg. of pericenter = 129.92103176 deg Long. of node = 14.87466437 deg Inclination = 17.76899757 deg Eccentricity = 0.22064466 Semimajor axis = 2.94031082 AU Perihelion dist = 2.29154693 AU Mag: H = 11.49, G = 0.15 Epoch of elements : MJD 56282.17000000 TDT (2012 Dec 21.170) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Dec 21 2502 Nummela 4h 4.9m UT 8.8 5 47 47.382 51 5 58.57TYC 3372-00277-1 10.3 15.3 17 1.6 1.573 -3.478 5.28 -64.4099 51.097 118.32 -23.44 4.0814 -0.08883 -0.54923 -5.86094 0.94758 0.00027 -0.00271 2000 322.98999320121219.00000129.921032 14.874664 17.7689980.22064466 2.9403108 2.291546911.7 5.00.15 RATE 1.9548530 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.073 0.059 82 5.01 0.060 0 0 2 1 056278.0020121221_0277-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Dec 16, 19:01 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org