IOTA/IOTA-ES occultation update for (3036) Krat / TYC 1434-00157-1 event on 2009 Jun 05, 02:04 UT Visible from Summary ------- On 2009 Jun 05 UT, the 42 km diameter asteroid (3036) Krat will occult a 9.9 mag star in the constellation Leo for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.3 mag to 16.2 mag (the magnitude of the asteroid) for at most 2.0 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: 27 * date and approx. time of event: 2009 Jun 05, 02:04 - 2009 Jun 05, 02:08 UT * magnitude of target star: 9.9 * magnitude drop [mag]: 6.3 * estimated maximum duration [s]: 2.0 * Moon: 93 % sunlit, 72° distance * Sun: 80° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 47 * 1 sigma uncertainty interval [path widths]: +/- 2.50 * 1 sigma uncertainty interval [seconds]: +/- 6.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .049 +/- .044) * 1 sigma uncertainty ellipse (major, minor, PA): ( .053", .039", 125° ) * approx speed of asteroid's shadow [km/s]: 21.6226 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1434-00157-1 by 3036 Krat on 2009 Jun 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 ' " Longitude Longitude Longitude Longitude - 46 42 56 -22 0 0 2 8 59 2 295 -77 - 47 14 9 - 46 11 10 ... .. .. ... .. .. - 48 50 6 -21 0 0 2 8 58 5 295 -75 - 49 19 11 - 48 20 36 - 51 38 49 - 45 45 56 Latitude Latitude Latitude Latitude - 50 0 0 -20 24 41 2 8 57 6 296 -74 -20 39 15 -20 10 5 .. .. .. -18 56 28 - 51 0 0 -19 53 0 2 8 56 7 296 -73 -20 7 42 -19 38 16 -21 20 40 -18 23 59 - 52 0 0 -19 20 2 2 8 56 8 296 -72 -19 34 52 -19 5 9 -20 48 30 -17 50 10 - 53 0 0 -18 45 44 2 8 55 9 297 -70 -19 0 43 -18 30 43 -20 15 3 -17 14 59 - 54 0 0 -18 10 5 2 8 54 10 297 -69 -18 25 13 -17 54 55 -19 40 17 -16 38 24 - 55 0 0 -17 33 3 2 8 52 11 297 -68 -17 48 20 -17 17 43 -19 4 10 -16 0 24 - 56 0 0 -16 54 35 2 8 51 12 298 -67 -17 10 2 -16 39 6 -18 26 40 -15 20 56 - 57 0 0 -16 14 40 2 8 50 14 298 -66 -16 30 18 -15 59 1 -17 47 45 -14 39 58 - 58 0 0 -15 33 16 2 8 48 15 298 -65 -15 49 4 -15 17 25 -17 7 23 -13 57 28 - 59 0 0 -14 50 20 2 8 46 16 298 -64 -15 6 19 -14 34 18 -16 25 32 -13 13 23 - 60 0 0 -14 5 50 2 8 44 17 299 -63 -14 22 1 -13 49 37 -15 42 10 -12 27 42 - 61 0 0 -13 19 44 2 8 42 18 299 -61 -13 36 7 -13 3 18 -14 57 14 -11 40 21 - 62 0 0 -12 31 59 2 8 40 20 299 -60 -12 48 35 -12 15 21 -14 10 43 -10 51 19 - 63 0 0 -11 42 34 2 8 37 21 299 -59 -11 59 22 -11 25 42 -13 22 33 -10 0 32 - 64 0 0 -10 51 25 2 8 34 22 299 -58 -11 8 26 -10 34 20 -12 32 44 - 9 7 58 - 65 0 0 - 9 58 30 2 8 31 23 299 -56 -10 15 46 - 9 41 10 -11 41 12 - 8 13 36 - 66 0 0 - 9 3 47 2 8 28 25 299 -55 - 9 21 17 - 8 46 13 -10 47 55 - 7 17 21 - 67 0 0 - 8 7 13 2 8 25 26 299 -54 - 8 24 59 - 7 49 23 - 9 52 50 - 6 19 12 - 68 0 0 - 7 8 46 2 8 21 27 299 -52 - 7 26 48 - 6 50 40 - 8 55 56 - 5 19 5 - 69 0 0 - 6 8 24 2 8 17 29 299 -51 - 6 26 42 - 5 50 1 - 7 57 11 - 4 17 0 - 70 0 0 - 5 6 4 2 8 13 30 299 -50 - 5 24 39 - 4 47 24 - 6 56 31 - 3 12 52 - 71 0 0 - 4 1 44 2 8 9 32 299 -48 - 4 20 37 - 3 42 46 - 5 53 55 - 2 6 40 - 72 0 0 - 2 55 22 2 8 4 33 298 -47 - 3 14 34 - 2 36 5 - 4 49 21 - 0 58 21 - 73 0 0 - 1 46 55 2 7 59 34 298 -45 - 2 6 27 - 1 27 19 - 3 42 47 0 12 7 - 74 0 0 - 0 36 23 2 7 54 36 298 -44 - 0 56 14 - 0 16 26 - 2 34 11 1 24 45 - 75 0 0 0 36 17 2 7 49 37 297 -42 0 16 5 0 56 34 - 1 23 32 2 39 35 - 76 0 0 1 51 5 2 7 43 39 297 -41 1 30 32 2 11 45 - 0 10 48 3 56 40 - 77 0 0 3 8 4 2 7 37 40 296 -39 2 47 8 3 29 6 1 4 2 5 15 59 - 78 0 0 4 27 12 2 7 31 42 296 -38 4 5 54 4 48 38 2 20 57 6 37 34 - 79 0 0 5 48 32 2 7 24 43 295 -36 5 26 49 6 10 21 3 39 59 8 1 24 - 80 0 0 7 12 1 2 7 17 45 294 -35 6 49 54 7 34 16 5 1 7 9 27 31 - 81 0 0 8 37 41 2 7 10 46 293 -33 8 15 8 9 0 21 6 24 20 10 55 51 - 82 0 0 10 5 28 2 7 2 48 292 -31 9 42 30 10 28 35 7 49 37 12 26 25 - 83 0 0 11 35 21 2 6 55 49 290 -30 11 11 56 11 58 56 9 16 56 13 59 10 - 84 0 0 13 7 17 2 6 47 51 289 -28 12 43 25 13 31 19 10 46 15 15 34 2 - 85 0 0 14 41 12 2 6 38 52 287 -26 14 16 52 15 5 43 12 17 29 17 10 57 - 86 0 0 16 17 1 2 6 30 54 285 -24 15 52 12 16 42 1 13 50 34 18 49 51 - 87 0 0 17 54 39 2 6 21 55 283 -23 17 29 20 18 20 8 15 25 26 20 30 36 - 88 0 0 19 33 58 2 6 12 56 280 -21 19 8 10 19 59 57 17 1 56 22 13 6 - 89 0 0 21 14 50 2 6 2 57 278 -19 20 48 32 21 41 20 18 39 59 23 57 11 - 90 0 0 22 57 6 2 5 53 59 275 -17 22 30 18 23 24 6 20 19 26 25 42 41 - 91 0 0 24 40 35 2 5 43 60 272 -16 24 13 18 25 8 6 22 0 6 27 29 24 - 92 0 0 26 25 6 2 5 33 61 268 -14 25 57 20 26 53 7 23 41 50 29 17 9 - 93 0 0 28 10 26 2 5 23 61 264 -12 27 42 10 28 38 57 25 24 25 31 5 40 - 94 0 0 29 56 20 2 5 13 62 261 -10 29 27 36 30 25 20 27 7 39 32 54 41 - 95 0 0 31 42 34 2 5 3 63 256 -9 31 13 22 32 12 2 28 51 17 34 43 57 - 96 0 0 33 28 50 2 4 53 63 252 -7 32 59 13 33 58 46 30 35 6 36 33 9 - 97 0 0 35 14 54 2 4 43 63 248 -5 34 44 51 35 45 15 32 18 49 38 21 58 - 98 0 0 37 0 26 2 4 33 63 243 -4 36 30 0 37 31 11 34 2 10 40 10 6 - 99 0 0 38 45 10 2 4 23 63 239 -2 38 14 23 39 16 16 35 44 55 41 57 12 -100 0 0 40 28 47 2 4 13 63 234 -1 39 57 41 41 0 13 37 26 45 43 42 57 Uncertainty in time = +/- 6 secs [Prediction of 2008 Apr 25.0] Data for the target star ------------------------ * name: TYC 1434-00157-1 * constellation : Leo * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 10 43 59.3743 DE: +21 52 27.005 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .016, .016 ) * V mag [mag]: 9.9 * B mag [mag]: 10.6 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3036) Krat approx. diameter [km]: 42 approx. diameter ["]: .016 distance from Earth [AU]: 3.54800 * orbital information: orbit source: Preston date of fit: 2008 Apr 25 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 607 number of rejected observations: 16 time covered by the observations: 1931 Oct 06 - 2008 Feb 28 1 sigma uncertainty ellipse (major, minor, PA): 0.051, 0.036, 128° remarks: * orbital elements for (3036) Krat : Mean anomaly = 188.50249629 deg Arg. of pericenter = 317.82561799 deg Long. of node = 24.00659761 deg Inclination = 22.88009522 deg Eccentricity = 0.09522401 Semimajor axis = 3.21325694 AU Perihelion dist = 2.90727771 AU Mag: H = 10.34, G = 0.15 Epoch of elements : MJD 54987.08600000 TDT (2009 Jun 05.086) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Jun 5 3036 Krat 2h 4.6m UT 9.9 10 43 59.374 21 52 27.01TYC 1434-00157-1 10.6 16.2 42 2.0 3.548 1.354 -23.66 -123.7901 21.881 148.47 22.55 2.0765 0.35165 0.28074 7.60400 -9.54605 0.00525 -0.00194 2000 187.2899812009 529.00000317.825618 24.006598 22.8800950.09522401 3.2132569 2.9072777 9.8 5.00.15 RATE 1.7111420 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.053 0.039 125 3.50 0.041 0 54581.5020090605_0157-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Apr 25, 07:03 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org