IOTA/IOTA-ES occultation update for (15788) 1993 SB / UCAC2 37831932 event on 2012 Dec 05, 19:24 UT Visible from Africa, Brazil Summary ------- On 2012 Dec 05 UT, the 127 km diameter asteroid (15788) 1993 SB will occult a 12.6 mag star in the constellation Aries for observers along a path across Africa, Brazil. In the case of an occultation, the combined light of the asteroid and the star will drop by 9.7 mag to 22.2 mag (the magnitude of the asteroid) for at most 6.5 seconds. This update is based on historical astrometry from the MPC files (via AstDys), and the following catalogs for the star position: UCAC. The event at a glimpse ---------------------- * Rank: 0 * date and approx. time of event: 2012 Dec 05, 22:27 - 2012 Dec 05, 22:37 UT * geocentric midpoint of event [JD]: 2456267.43964167 * magnitude of target star: 12.6 * magnitude drop [mag]: 9.7 * estimated maximum duration [s]: 6.5 * Moon: 57 % sunlit, 112° distance * Sun: 150° distance * rough path description: Africa, Brazil The occultation path -------------------- * approximate projected width [km]: 131 * 1 sigma uncertainty interval [path widths]: +/- 107.96 * 1 sigma uncertainty interval [seconds]: +/- 1457.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 1.472 +/- .871) * 1 sigma uncertainty ellipse (major, minor, PA): ( 1.535", .755", 71° ) * approx speed of asteroid's shadow [km/s]: 19.5625 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC2 37831932 by 15788 1993 SB on 2012 Dec 5 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 - 63 0 0 -19 16 29 22 37 39 29 56 0 -18 37 6 -19 55 59 .. .. .. .. .. .. - 62 0 0 -18 49 16 22 37 36 30 56 -1 -18 9 52 -19 28 47 .. .. .. .. .. .. - 61 0 0 -18 21 55 22 37 33 31 55 -2 -17 42 30 -19 1 27 .. .. .. .. .. .. - 60 0 0 -17 54 27 22 37 30 32 55 -3 -17 15 2 -18 34 0 .. .. .. .. .. .. - 59 0 0 -17 26 54 22 37 26 33 54 -5 -16 47 28 -18 6 27 .. .. .. .. .. .. - 58 0 0 -16 59 14 22 37 23 34 54 -6 -16 19 48 -17 38 48 .. .. .. .. .. .. - 57 0 0 -16 31 30 22 37 19 35 54 -7 -15 52 4 -17 11 4 .. .. .. .. .. .. - 56 0 0 -16 3 42 22 37 16 36 53 -8 -15 24 16 -16 43 16 .. .. .. .. .. .. - 55 0 0 -15 35 50 22 37 12 37 53 -9 -14 56 24 -16 15 24 .. .. .. .. .. .. - 54 0 0 -15 7 56 22 37 8 38 52 -10 -14 28 30 -15 47 29 .. .. .. .. .. .. - 53 0 0 -14 39 59 22 37 4 40 52 -11 -14 0 34 -15 19 32 .. .. .. .. .. .. - 52 0 0 -14 12 1 22 37 0 41 52 -12 -13 32 37 -14 51 33 .. .. .. .. .. .. - 51 0 0 -13 44 3 22 36 56 42 51 -13 -13 4 39 -14 23 34 .. .. .. .. .. .. - 50 0 0 -13 16 5 22 36 52 43 51 -14 -12 36 42 -13 55 35 .. .. .. .. .. .. - 49 0 0 -12 48 7 22 36 48 44 50 -15 -12 8 46 -13 27 36 .. .. .. .. .. .. - 48 0 0 -12 20 12 22 36 43 45 50 -16 -11 40 52 -12 59 39 .. .. .. .. .. .. - 47 0 0 -11 52 18 22 36 39 46 49 -17 -11 13 0 -12 31 44 .. .. .. .. .. .. - 46 0 0 -11 24 28 22 36 34 47 49 -18 -10 45 11 -12 3 52 .. .. .. .. .. .. - 45 0 0 -10 56 41 22 36 30 48 48 -19 -10 17 26 -11 36 4 .. .. .. .. .. .. - 44 0 0 -10 28 58 22 36 25 49 48 -20 - 9 49 45 -11 8 19 .. .. .. .. .. .. - 43 0 0 -10 1 21 22 36 20 50 47 -21 - 9 22 10 -10 40 40 .. .. .. .. .. .. - 42 0 0 - 9 33 50 22 36 16 51 47 -23 - 8 54 41 -10 13 6 .. .. .. .. .. .. - 41 0 0 - 9 6 25 22 36 11 52 46 -24 - 8 27 18 - 9 45 39 .. .. .. .. .. .. - 40 0 0 - 8 39 7 22 36 6 53 45 -25 - 8 0 3 - 9 18 19 .. .. .. .. .. .. - 39 0 0 - 8 11 57 22 36 1 54 45 -26 - 7 32 55 - 8 51 6 .. .. .. .. .. .. - 38 0 0 - 7 44 55 22 35 56 55 44 -27 - 7 5 57 - 8 24 2 .. .. .. .. .. .. - 37 0 0 - 7 18 3 22 35 50 56 43 -28 - 6 39 7 - 7 57 7 .. .. .. .. .. .. - 36 0 0 - 6 51 21 22 35 45 57 43 -29 - 6 12 27 - 7 30 21 .. .. .. .. .. .. - 35 0 0 - 6 24 48 22 35 40 58 42 -30 - 5 45 58 - 7 3 46 .. .. .. .. .. .. - 34 0 0 - 5 58 27 22 35 35 59 41 -31 - 5 19 40 - 6 37 22 .. .. .. .. .. .. - 33 0 0 - 5 32 18 22 35 29 60 40 -32 - 4 53 34 - 6 11 9 .. .. .. .. .. .. - 32 0 0 - 5 6 21 22 35 24 61 39 -33 - 4 27 40 - 5 45 9 .. .. .. .. .. .. - 31 0 0 - 4 40 36 22 35 18 62 38 -34 - 4 1 59 - 5 19 21 .. .. .. .. .. .. - 30 0 0 - 4 15 5 22 35 13 63 37 -35 - 3 36 31 - 4 53 46 .. .. .. .. .. .. - 29 0 0 - 3 49 48 22 35 7 63 36 -36 - 3 11 17 - 4 28 25 .. .. .. .. .. .. - 28 0 0 - 3 24 45 22 35 2 64 35 -37 - 2 46 18 - 4 3 19 .. .. .. .. .. .. - 27 0 0 - 2 59 57 22 34 56 65 34 -38 - 2 21 34 - 3 38 28 .. .. .. .. .. .. - 26 0 0 - 2 35 25 22 34 50 66 32 -39 - 1 57 6 - 3 13 52 .. .. .. .. .. .. - 25 0 0 - 2 11 9 22 34 45 67 31 -40 - 1 32 53 - 2 49 32 .. .. .. .. .. .. - 24 0 0 - 1 47 9 22 34 39 68 29 -41 - 1 8 57 - 2 25 28 .. .. .. .. .. .. - 23 0 0 - 1 23 26 22 34 33 69 28 -43 - 0 45 18 - 2 1 41 .. .. .. .. .. .. - 22 0 0 - 1 0 0 22 34 28 69 26 -44 - 0 21 56 - 1 38 12 .. .. .. .. .. .. - 21 0 0 - 0 36 53 22 34 22 70 24 -45 0 1 8 - 1 15 0 .. .. .. .. .. .. - 20 0 0 - 0 14 3 22 34 16 71 22 -46 0 23 53 - 0 52 6 .. .. .. .. .. .. - 19 0 0 0 8 28 22 34 10 72 19 -47 0 46 20 - 0 29 31 .. .. .. .. .. .. - 18 0 0 0 30 40 22 34 4 72 17 -48 1 8 28 - 0 7 15 .. .. .. .. .. .. - 17 0 0 0 52 32 22 33 59 73 14 -49 1 30 16 0 14 41 .. .. .. .. .. .. - 16 0 0 1 14 5 22 33 53 73 11 -50 1 51 45 0 36 18 .. .. .. .. .. .. - 15 0 0 1 35 18 22 33 47 74 8 -51 2 12 54 0 57 35 .. .. .. .. .. .. - 14 0 0 1 56 10 22 33 41 74 5 -52 2 33 42 1 18 31 .. .. .. .. .. .. - 13 0 0 2 16 41 22 33 35 75 2 -53 2 54 9 1 39 6 .. .. .. .. .. .. - 12 0 0 2 36 52 22 33 29 75 358 -54 3 14 16 1 59 21 .. .. .. .. .. .. - 11 0 0 2 56 41 22 33 24 75 354 -55 3 34 1 2 19 14 .. .. .. .. .. .. - 10 0 0 3 16 8 22 33 18 76 350 -56 3 53 24 2 38 45 .. .. .. .. .. .. - 9 0 0 3 35 13 22 33 12 76 346 -57 4 12 26 2 57 55 .. .. .. .. .. .. - 8 0 0 3 53 57 22 33 6 76 343 -58 4 31 5 3 16 42 .. .. .. .. .. .. - 7 0 0 4 12 18 22 33 0 76 339 -58 4 49 22 3 35 7 .. .. .. .. .. .. - 6 0 0 4 30 16 22 32 54 76 335 -59 5 7 17 3 53 9 .. .. .. .. .. .. - 5 0 0 4 47 51 22 32 49 75 331 -60 5 24 48 4 10 48 .. .. .. .. .. .. - 4 0 0 5 5 4 22 32 43 75 327 -61 5 41 57 4 28 4 .. .. .. .. .. .. - 3 0 0 5 21 53 22 32 37 75 324 -62 5 58 42 4 44 57 .. .. .. .. .. .. - 2 0 0 5 38 18 22 32 31 74 320 -63 6 15 4 5 1 26 .. .. .. .. .. .. - 1 0 0 5 54 20 22 32 26 74 317 -64 6 31 2 5 17 32 .. .. .. .. .. .. 0 0 0 6 9 59 22 32 20 73 314 -65 6 46 37 5 33 14 .. .. .. .. .. .. 1 0 0 6 25 13 22 32 15 73 312 -66 7 1 48 5 48 32 .. .. .. .. .. .. 2 0 0 6 40 3 22 32 9 72 309 -67 7 16 34 6 3 25 .. .. .. .. .. .. 3 0 0 6 54 29 22 32 3 72 307 -68 7 30 57 6 17 54 .. .. .. .. .. .. 4 0 0 7 8 30 22 31 58 71 305 -68 7 44 55 6 31 59 .. .. .. .. .. .. 5 0 0 7 22 7 22 31 52 70 303 -69 7 58 29 6 45 39 .. .. .. .. .. .. 6 0 0 7 35 19 22 31 47 70 301 -70 8 11 38 6 58 55 .. .. .. .. .. .. 7 0 0 7 48 7 22 31 41 69 299 -71 8 24 22 7 11 46 .. .. .. .. .. .. 8 0 0 8 0 30 22 31 36 68 298 -72 8 36 42 7 24 11 .. .. .. .. .. .. 9 0 0 8 12 27 22 31 31 67 296 -72 8 48 37 7 36 12 .. .. .. .. .. .. 10 0 0 8 24 0 22 31 25 67 295 -73 9 0 7 7 47 47 .. .. .. .. .. .. 11 0 0 8 35 8 22 31 20 66 294 -74 9 11 11 7 58 58 .. .. .. .. .. .. 12 0 0 8 45 50 22 31 15 65 293 -74 9 21 51 8 9 43 .. .. .. .. .. .. 13 0 0 8 56 7 22 31 9 64 292 -75 9 32 6 8 20 2 .. .. .. .. .. .. 14 0 0 9 5 58 22 31 4 63 291 -75 9 41 55 8 29 56 .. .. .. .. .. .. 15 0 0 9 15 25 22 30 59 63 290 -76 9 51 19 8 39 25 .. .. .. .. .. .. 16 0 0 9 24 25 22 30 54 62 290 -76 10 0 17 8 48 28 .. .. .. .. .. .. 17 0 0 9 33 0 22 30 49 61 289 -77 10 8 50 8 57 5 .. .. .. .. .. .. 18 0 0 9 41 10 22 30 44 60 288 -77 10 16 57 9 5 17 .. .. .. .. .. .. 19 0 0 9 48 54 22 30 39 59 288 -77 10 24 39 9 13 2 .. .. .. .. .. .. 20 0 0 9 56 12 22 30 34 58 287 -77 10 31 55 9 20 22 .. .. .. .. .. .. 21 0 0 10 3 4 22 30 29 57 287 -77 10 38 46 9 27 16 .. .. .. .. .. .. 22 0 0 10 9 30 22 30 25 56 286 -77 10 45 11 9 33 45 .. .. .. .. .. .. 23 0 0 10 15 31 22 30 20 56 286 -77 10 51 10 9 39 47 .. .. .. .. .. .. 24 0 0 10 21 6 22 30 15 55 286 -77 10 56 43 9 45 23 .. .. .. .. .. .. 25 0 0 10 26 14 22 30 11 54 285 -77 11 1 50 9 50 33 .. .. .. .. .. .. 26 0 0 10 30 57 22 30 6 53 285 -77 11 6 32 9 55 17 .. .. .. .. .. .. 27 0 0 10 35 14 22 30 2 52 285 -76 11 10 47 9 59 35 .. .. .. .. .. .. 28 0 0 10 39 4 22 29 57 51 285 -76 11 14 37 10 3 26 .. .. .. .. .. .. 29 0 0 10 42 29 22 29 53 50 285 -75 11 18 1 10 6 52 .. .. .. .. .. .. 30 0 0 10 45 28 22 29 48 49 284 -75 11 20 59 10 9 51 .. .. .. .. .. .. 31 0 0 10 48 0 22 29 44 48 284 -74 11 23 30 10 12 24 .. .. .. .. .. .. 32 0 0 10 50 6 22 29 40 47 284 -74 11 25 36 10 14 30 .. .. .. .. .. .. 33 0 0 10 51 46 22 29 36 46 284 -73 11 27 15 10 16 11 .. .. .. .. .. .. 34 0 0 10 53 0 22 29 32 45 284 -72 11 28 29 10 17 25 .. .. .. .. .. .. 35 0 0 10 53 47 22 29 28 44 284 -72 11 29 16 10 18 12 .. .. .. .. .. .. 36 0 0 10 54 8 22 29 24 44 284 -71 11 29 37 10 18 34 .. .. .. .. .. .. 37 0 0 10 54 3 22 29 20 43 284 -70 11 29 32 10 18 28 .. .. .. .. .. .. 38 0 0 10 53 32 22 29 16 42 284 -70 11 29 1 10 17 57 .. .. .. .. .. .. 39 0 0 10 52 34 22 29 12 41 284 -69 11 28 4 10 16 59 .. .. .. .. .. .. 40 0 0 10 51 10 22 29 9 40 284 -68 11 26 40 10 15 34 .. .. .. .. .. .. 41 0 0 10 49 19 22 29 5 39 284 -67 11 24 50 10 13 43 .. .. .. .. .. .. 42 0 0 10 47 2 22 29 2 38 284 -66 11 22 34 10 11 25 .. .. .. .. .. .. 43 0 0 10 44 19 22 28 58 37 284 -65 11 19 51 10 8 41 .. .. .. .. .. .. 44 0 0 10 41 9 22 28 55 36 284 -65 11 16 42 10 5 30 .. .. .. .. .. .. 45 0 0 10 37 33 22 28 52 35 284 -64 11 13 7 10 1 53 .. .. .. .. .. .. 46 0 0 10 33 30 22 28 48 34 284 -63 11 9 6 9 57 49 .. .. .. .. .. .. 47 0 0 10 29 1 22 28 45 33 284 -62 11 4 38 9 53 19 .. .. .. .. .. .. 48 0 0 10 24 5 22 28 42 32 284 -61 10 59 43 9 48 22 .. .. .. .. .. .. 49 0 0 10 18 43 22 28 39 31 284 -60 10 54 23 9 42 58 .. .. .. .. .. .. 50 0 0 10 12 55 22 28 36 30 284 -59 10 48 36 9 37 8 .. .. .. .. .. .. 51 0 0 10 6 40 22 28 33 29 284 -58 10 42 22 9 30 51 .. .. .. .. .. .. 52 0 0 9 59 58 22 28 30 28 285 -57 10 35 43 9 24 7 .. .. .. .. .. .. 53 0 0 9 52 50 22 28 28 27 285 -57 10 28 37 9 16 57 .. .. .. .. .. .. 54 0 0 9 45 15 22 28 25 26 285 -56 10 21 4 9 9 20 .. .. .. .. .. .. 55 0 0 9 37 14 22 28 23 25 285 -55 10 13 5 9 1 17 .. .. .. .. .. .. 56 0 0 9 28 46 22 28 20 24 285 -54 10 4 40 8 52 47 .. .. .. .. .. .. 57 0 0 9 19 52 22 28 18 23 285 -53 9 55 48 8 43 51 .. .. .. .. .. .. 58 0 0 9 10 32 22 28 16 22 285 -52 9 46 30 8 34 27 .. .. .. .. .. .. 59 0 0 9 0 45 22 28 13 21 285 -51 9 36 46 8 24 38 .. .. .. .. .. .. 60 0 0 8 50 31 22 28 11 20 285 -50 9 26 35 8 14 22 .. .. .. .. .. .. 61 0 0 8 39 51 22 28 9 19 286 -49 9 15 58 8 3 39 .. .. .. .. .. .. 62 0 0 8 28 45 22 28 7 18 286 -48 9 4 55 7 52 30 .. .. .. .. .. .. 63 0 0 8 17 13 22 28 6 17 286 -47 8 53 25 7 40 54 .. .. .. .. .. .. 64 0 0 8 5 14 22 28 4 16 286 -46 8 41 30 7 28 52 .. .. .. .. .. .. 65 0 0 7 52 49 22 28 2 15 286 -45 8 29 8 7 16 24 .. .. .. .. .. .. 66 0 0 7 39 58 22 28 1 14 286 -44 8 16 20 7 3 30 .. .. .. .. .. .. 67 0 0 7 26 41 22 27 59 13 286 -43 8 3 7 6 50 9 .. .. .. .. .. .. 68 0 0 7 12 58 22 27 58 12 286 -42 7 49 27 6 36 22 .. .. .. .. .. .. 69 0 0 6 58 49 22 27 57 11 286 -41 7 35 21 6 22 10 .. .. .. .. .. .. 70 0 0 6 44 14 22 27 56 10 287 -40 7 20 50 6 7 31 .. .. .. .. .. .. 71 0 0 6 29 13 22 27 55 9 287 -39 7 5 53 5 52 27 .. .. .. .. .. .. 72 0 0 6 13 47 22 27 54 8 287 -38 6 50 31 5 36 56 .. .. .. .. .. .. 73 0 0 5 57 55 22 27 53 7 287 -37 6 34 43 5 21 1 .. .. .. .. .. .. 74 0 0 5 41 38 22 27 52 6 287 -36 6 18 30 5 4 40 .. .. .. .. .. .. 75 0 0 5 24 55 22 27 52 5 287 -35 6 1 51 4 47 53 .. .. .. .. .. .. 76 0 0 5 7 48 22 27 51 4 287 -34 5 44 48 4 30 41 .. .. .. .. .. .. 77 0 0 4 50 15 22 27 51 3 287 -33 5 27 19 4 13 5 .. .. .. .. .. .. 78 0 0 4 32 18 22 27 50 2 287 -32 5 9 26 3 55 3 .. .. .. .. .. .. 79 0 0 4 13 56 22 27 50 1 287 -31 4 51 9 3 36 37 .. .. .. .. .. .. 80 0 0 3 55 10 22 27 50 0 287 -30 4 32 27 .. .. .. .. .. .. .. .. .. Uncertainty in time = +/- 1522 secs Prediction of 2012 Dec 3.0 Data for the target star ------------------------ * name: UCAC2 37831932 * constellation : Aries * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 02 43 00.5983 DE: +17 24 24.042 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .081, .080 ) * V mag [mag]: 12.6 * B mag [mag]: 0.0 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (15788) 1993 SB approx. diameter [km]: 127 approx. diameter ["]: .007 distance from Earth [AU]: 26.74600 * orbital information: orbit source: Preston date of fit: 2012 Jul 10 source of used astrometry: MPC (via Astdys) number of used observations: 50 number of rejected observations: 1 time covered by the observations: 1993 Sep 16 - 2008 Oct 22 1 sigma uncertainty ellipse (major, minor, PA): 1.533, 0.751, 71° remarks: * orbital elements for (15788) 1993 SB : Mean anomaly = 345.74637672 deg Arg. of pericenter = 78.86445293 deg Long. of node = 354.87712387 deg Inclination = 1.93879988 deg Eccentricity = 0.32545815 Semimajor axis = 39.65741732 AU Perihelion dist = 26.75058763 AU Mag: H = 7.69, G = 0.15 Epoch of elements : MJD 56266.80900000 TDT (2012 Dec 05.809) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Dec 5 15788 1993 SB 22h 33.1m UT 12.6 2 43 0.598 17 24 24.04UCAC2 37831932 0.0 22.2 127 6.5 26.746 -0.241 -1.14 -12.6431 17.407 -160.52 -22.50 22.5514 0.08050 -0.23308-10.48140 -3.47249 0.00300 0.00080 2000 345.71950520121129.00000 78.864453354.877124 1.9388000.3254581539.657417326.7505876 7.7 5.00.15 RATE 0.0394650 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 1.535 0.755 71108.96 0.707 0 0 3 2 056264.0020121205_831932 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Jul 10, 04:26 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org