IOTA/IOTA-ES occultation update for (1305) Pongola / TYC 1397-00304-1 event on 2009 Nov 05, 07:58 UT Visible from Summary ------- On 2009 Nov 05 UT, the 30 km diameter asteroid (1305) Pongola will occult a 10.2 mag star in the constellation Cancer for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.1 mag to 16.3 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: 38 * date and approx. time of event: 2009 Nov 05, 07:51 - 2009 Nov 05, 07:58 UT * magnitude of target star: 10.2 * magnitude drop [mag]: 6.1 * estimated maximum duration [s]: 2.0 * Moon: 92 % sunlit, 55° distance * Sun: 92° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 31 * 1 sigma uncertainty interval [path widths]: +/- 1.72 * 1 sigma uncertainty interval [seconds]: +/- 4.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .032 +/- .026) * 1 sigma uncertainty ellipse (major, minor, PA): ( .032", .026", 100° ) * approx speed of asteroid's shadow [km/s]: 14.8772 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1397-00304-1 by 1305 Pongola on 2009 Nov 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 -126 0 0 20 26 27 7 51 22 0 69 -84 20 17 36 20 35 18 19 47 12 21 5 48 -125 0 0 20 47 38 7 51 22 1 70 -84 20 38 48 20 56 29 20 8 25 21 26 57 -124 0 0 21 8 36 7 51 23 2 70 -84 20 59 46 21 17 26 20 29 25 21 47 52 -123 0 0 21 29 19 7 51 23 3 70 -84 21 20 30 21 38 9 20 50 11 22 8 32 -122 0 0 21 49 48 7 51 24 4 71 -84 21 40 59 21 58 37 21 10 43 22 28 58 -121 0 0 22 10 2 7 51 24 5 71 -83 22 1 14 22 18 50 21 31 0 22 49 10 -120 0 0 22 30 1 7 51 25 6 72 -83 22 21 14 22 38 49 21 51 2 23 9 6 -119 0 0 22 49 44 7 51 26 7 72 -82 22 40 58 22 58 31 22 10 48 23 28 46 -118 0 0 23 9 12 7 51 27 8 72 -82 23 0 26 23 17 58 22 30 18 23 48 10 -117 0 0 23 28 23 7 51 28 9 73 -81 23 19 38 23 37 9 22 49 33 24 7 19 -116 0 0 23 47 18 7 51 29 10 73 -80 23 38 33 23 56 3 23 8 31 24 26 10 -115 0 0 24 5 56 7 51 31 11 74 -79 23 57 12 24 14 40 23 27 12 24 44 45 -114 0 0 24 24 17 7 51 32 12 74 -79 24 15 34 24 33 1 23 45 36 25 3 3 -113 0 0 24 42 21 7 51 34 13 74 -78 24 33 39 24 51 4 24 3 43 25 21 4 -112 0 0 25 0 7 7 51 35 14 75 -77 24 51 26 25 8 49 24 21 33 25 38 47 -111 0 0 25 17 36 7 51 37 15 75 -76 25 8 55 25 26 17 24 39 5 25 56 12 -110 0 0 25 34 46 7 51 39 16 76 -75 25 26 6 25 43 27 24 56 18 26 13 19 -109 0 0 25 51 38 7 51 41 17 76 -74 25 42 59 26 0 18 25 13 14 26 30 8 -108 0 0 26 8 12 7 51 43 18 77 -73 25 59 33 26 16 51 25 29 51 26 46 38 -107 0 0 26 24 27 7 51 46 19 77 -72 26 15 49 26 33 5 25 46 9 27 2 50 -106 0 0 26 40 23 7 51 48 20 78 -71 26 31 46 26 49 1 26 2 9 27 18 43 -105 0 0 26 56 1 7 51 50 21 78 -71 26 47 24 27 4 37 26 17 50 27 34 16 -104 0 0 27 11 19 7 51 53 22 79 -70 27 2 43 27 19 55 26 33 11 27 49 31 -103 0 0 27 26 17 7 51 56 22 79 -69 27 17 43 27 34 53 26 48 13 28 4 27 -102 0 0 27 40 57 7 51 58 23 80 -68 27 32 23 27 49 31 27 2 56 28 19 2 -101 0 0 27 55 16 7 52 1 24 80 -67 27 46 43 28 3 50 27 17 19 28 33 19 -100 0 0 28 9 16 7 52 4 25 81 -66 28 0 44 28 17 49 27 31 22 28 47 15 - 99 0 0 28 22 56 7 52 7 26 81 -65 28 14 24 28 31 28 27 45 5 29 0 52 - 98 0 0 28 36 16 7 52 10 27 82 -64 28 27 45 28 44 48 27 58 28 29 14 9 - 97 0 0 28 49 16 7 52 14 28 82 -63 28 40 46 28 57 47 28 11 32 29 27 5 - 96 0 0 29 1 56 7 52 17 29 83 -62 28 53 26 29 10 26 28 24 14 29 39 42 - 95 0 0 29 14 15 7 52 20 30 83 -62 29 5 46 29 22 45 28 36 37 29 51 58 - 94 0 0 29 26 14 7 52 24 31 84 -61 29 17 46 29 34 43 28 48 39 30 3 54 - 93 0 0 29 37 53 7 52 27 32 84 -60 29 29 25 29 46 21 29 0 21 30 15 30 - 92 0 0 29 49 11 7 52 31 32 85 -59 29 40 44 29 57 38 29 11 42 30 26 45 - 91 0 0 30 0 8 7 52 35 33 85 -58 29 51 42 30 8 35 29 22 42 30 37 39 - 90 0 0 30 10 45 7 52 38 34 86 -57 30 2 19 30 19 11 29 33 22 30 48 13 - 89 0 0 30 21 1 7 52 42 35 87 -56 30 12 36 30 29 26 29 43 40 30 58 26 - 88 0 0 30 30 56 7 52 46 36 87 -55 30 22 32 30 39 21 29 53 38 31 8 19 - 87 0 0 30 40 31 7 52 50 37 88 -54 30 32 7 30 48 55 30 3 15 31 17 50 - 86 0 0 30 49 44 7 52 54 38 88 -54 30 41 21 30 58 8 30 12 32 31 27 1 - 85 0 0 30 58 37 7 52 59 39 89 -53 30 50 14 31 7 0 30 21 27 31 35 51 - 84 0 0 31 7 9 7 53 3 40 90 -52 30 58 46 31 15 31 30 30 1 31 44 21 - 83 0 0 31 15 19 7 53 7 40 90 -51 31 6 58 31 23 41 30 38 14 31 52 29 - 82 0 0 31 23 9 7 53 12 41 91 -50 31 14 48 31 31 30 30 46 6 32 0 16 - 81 0 0 31 30 38 7 53 16 42 92 -49 31 22 17 31 38 58 30 53 37 32 7 43 - 80 0 0 31 37 45 7 53 21 43 92 -48 31 29 25 31 46 5 31 0 46 32 14 48 - 79 0 0 31 44 32 7 53 25 44 93 -47 31 36 12 31 52 51 31 7 35 32 21 33 - 78 0 0 31 50 57 7 53 30 45 94 -47 31 42 38 31 59 16 31 14 2 32 27 56 - 77 0 0 31 57 1 7 53 34 46 94 -46 31 48 42 32 5 20 31 20 8 32 33 58 - 76 0 0 32 2 44 7 53 39 46 95 -45 31 54 26 32 11 3 31 25 53 32 39 40 - 75 0 0 32 8 6 7 53 44 47 96 -44 31 59 48 32 16 24 31 31 17 32 45 0 - 74 0 0 32 13 7 7 53 49 48 97 -43 32 4 49 32 21 25 31 36 19 32 49 59 - 73 0 0 32 17 46 7 53 54 49 97 -42 32 9 29 32 26 4 31 41 0 32 54 37 - 72 0 0 32 22 4 7 53 59 50 98 -41 32 13 47 32 30 22 31 45 19 32 58 54 - 71 0 0 32 26 1 7 54 4 51 99 -41 32 17 45 32 34 18 31 49 18 33 2 50 - 70 0 0 32 29 37 7 54 9 52 100 -40 32 21 21 32 37 54 31 52 54 33 6 24 - 69 0 0 32 32 52 7 54 14 52 100 -39 32 24 36 32 41 8 31 56 10 33 9 38 - 68 0 0 32 35 45 7 54 20 53 101 -38 32 27 29 32 44 1 31 59 4 33 12 30 - 67 0 0 32 38 17 7 54 25 54 102 -37 32 30 1 32 46 33 32 1 37 33 15 1 - 66 0 0 32 40 28 7 54 30 55 103 -36 32 32 12 32 48 44 32 3 48 33 17 11 - 65 0 0 32 42 17 7 54 36 56 104 -35 32 34 2 32 50 33 32 5 38 33 19 0 - 64 0 0 32 43 45 7 54 41 56 105 -34 32 35 30 32 52 1 32 7 7 33 20 28 - 63 0 0 32 44 52 7 54 47 57 106 -34 32 36 37 32 53 7 32 8 14 33 21 34 - 62 0 0 32 45 37 7 54 52 58 107 -33 32 37 22 32 53 53 32 9 0 33 22 19 - 61 0 0 32 46 1 7 54 58 59 108 -32 32 37 46 32 54 17 32 9 24 33 22 43 - 60 0 0 32 46 4 7 55 3 60 109 -31 32 37 49 32 54 20 32 9 27 33 22 46 - 59 0 0 32 45 45 7 55 9 61 110 -30 32 37 30 32 54 1 32 9 8 33 22 27 - 58 0 0 32 45 5 7 55 15 61 111 -29 32 36 50 32 53 21 32 8 28 33 21 47 - 57 0 0 32 44 4 7 55 21 62 112 -28 32 35 48 32 52 19 32 7 26 33 20 46 - 56 0 0 32 42 41 7 55 26 63 113 -28 32 34 25 32 50 57 32 6 3 33 19 23 - 55 0 0 32 40 57 7 55 32 64 114 -27 32 32 41 32 49 12 32 4 18 33 17 40 - 54 0 0 32 38 51 7 55 38 65 115 -26 32 30 35 32 47 7 32 2 11 33 15 34 - 53 0 0 32 36 24 7 55 44 65 117 -25 32 28 8 32 44 40 31 59 44 33 13 8 - 52 0 0 32 33 35 7 55 50 66 118 -24 32 25 19 32 41 51 31 56 54 33 10 20 - 51 0 0 32 30 25 7 55 56 67 119 -23 32 22 9 32 38 41 31 53 43 33 7 11 - 50 0 0 32 26 53 7 56 2 68 121 -22 32 18 37 32 35 10 31 50 10 33 3 40 - 49 0 0 32 23 0 7 56 8 69 122 -22 32 14 43 32 31 17 31 46 16 32 59 48 - 48 0 0 32 18 45 7 56 15 69 124 -21 32 10 28 32 27 3 31 42 0 32 55 35 - 47 0 0 32 14 9 7 56 21 70 126 -20 32 5 52 32 22 27 31 37 22 32 51 0 - 46 0 0 32 9 11 7 56 27 71 128 -19 32 0 53 32 17 29 31 32 23 32 46 4 - 45 0 0 32 3 52 7 56 33 71 130 -18 31 55 34 32 12 10 31 27 2 32 40 46 - 44 0 0 31 58 11 7 56 40 72 132 -17 31 49 52 32 6 30 31 21 19 32 35 7 - 43 0 0 31 52 8 7 56 46 73 134 -16 31 43 50 32 0 28 31 15 15 32 29 6 - 42 0 0 31 45 44 7 56 53 74 136 -15 31 37 25 31 54 4 31 8 49 32 22 44 - 41 0 0 31 38 59 7 56 59 74 139 -15 31 30 39 31 47 19 31 2 1 32 16 0 - 40 0 0 31 31 51 7 57 5 75 141 -14 31 23 31 31 40 12 30 54 52 32 8 55 - 39 0 0 31 24 22 7 57 12 76 144 -13 31 16 2 31 32 43 30 47 21 32 1 28 - 38 0 0 31 16 32 7 57 19 76 148 -12 31 8 11 31 24 53 30 39 28 31 53 40 - 37 0 0 31 8 20 7 57 25 77 151 -11 30 59 58 31 16 42 30 31 13 31 45 30 - 36 0 0 30 59 46 7 57 32 77 155 -10 30 51 24 31 8 9 30 22 37 31 36 59 - 35 0 0 30 50 51 7 57 38 78 159 -9 30 42 28 30 59 14 30 13 39 31 28 6 - 34 0 0 30 41 34 7 57 45 78 163 -8 30 33 10 30 49 58 30 4 20 31 18 52 - 33 0 0 30 31 55 7 57 52 78 167 -7 30 23 31 30 40 20 29 54 39 31 9 16 - 32 0 0 30 21 55 7 57 59 79 172 -7 30 13 31 30 30 20 29 44 36 30 59 19 - 31 0 0 30 11 34 7 58 5 79 177 -6 30 3 8 30 19 59 29 34 11 30 49 1 - 30 0 0 30 0 51 7 58 12 79 183 -5 29 52 25 30 9 17 29 23 25 30 38 21 - 29 0 0 29 49 46 7 58 19 79 188 -4 29 41 19 29 58 13 29 12 18 30 27 19 - 28 0 0 29 38 20 7 58 26 79 194 -3 29 29 53 29 46 48 29 0 49 30 15 56 - 27 0 0 29 26 33 7 58 33 79 199 -2 29 18 5 29 35 1 28 48 58 30 4 12 - 26 0 0 29 14 24 7 58 39 79 204 -1 29 5 55 29 22 53 28 36 46 29 52 7 - 25 0 0 29 1 54 7 58 46 79 210 0 28 53 25 29 10 24 28 24 13 29 39 40 Uncertainty in time = +/- 4 secs [Prediction of 2008 Apr 25.0] Data for the target star ------------------------ * name: TYC 1397-00304-1 * constellation : Cancer * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 08 54 18.5437 DE: +19 22 27.124 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .019, .019 ) * V mag [mag]: 10.2 * B mag [mag]: 11.4 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1305) Pongola approx. diameter [km]: 30 approx. diameter ["]: .015 distance from Earth [AU]: 2.83300 * orbital information: orbit source: Preston date of fit: 2008 Apr 25 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 907 number of rejected observations: 64 time covered by the observations: 1927 Mar 29 - 2008 Jan 01 1 sigma uncertainty ellipse (major, minor, PA): 0.026, 0.018, 105° remarks: * orbital elements for (1305) Pongola : Mean anomaly = 267.99979309 deg Arg. of pericenter = 149.17631037 deg Long. of node = 63.06968868 deg Inclination = 2.31879000 deg Eccentricity = 0.07624560 Semimajor axis = 3.01270071 AU Perihelion dist = 2.78299553 AU Mag: H = 10.53, G = 0.15 Epoch of elements : MJD 55140.33200000 TDT (2009 Nov 05.332) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Nov 5 1305 Pongola 7h 58.4m UT 10.2 8 54 18.544 19 22 27.12TYC 1397-00304-1 11.4 16.3 30 2.0 2.833 1.807 -5.02 -30.7095 19.376 56.30 -15.75 7.9733 0.03480 0.17700 8.23996 -1.61704 -0.00566 0.00160 2000 267.937217200911 5.00000149.176310 63.069689 2.3187900.07624560 3.0127007 2.782995510.7 5.00.15 RATE 1.8848210 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.032 0.026 100 2.72 0.025 0 54581.5020091105_0304-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Apr 25, 09:26 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org