IOTA/IOTA-ES occultation update for (1243) Pamela / TYC 6300-00626-1 event on 2009 Apr 04, 00:32 UT Visible from Summary ------- On 2009 Apr 04 UT, the 70 km diameter asteroid (1243) Pamela will occult a 12.1 mag star in the constellation Sagittarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 3.3 mag to 15.3 mag (the magnitude of the asteroid) for at most 3.6 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: UCAC. The event at a glimpse ---------------------- * Rank: 53 * date and approx. time of event: 2009 Apr 04, 00:26 - 2009 Apr 04, 00:31 UT * magnitude of target star: 12.1 * magnitude drop [mag]: 3.3 * estimated maximum duration [s]: 3.6 * Moon: 66 % sunlit, 164° distance * Sun: 86° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 70 * 1 sigma uncertainty interval [path widths]: +/- 1.19 * 1 sigma uncertainty interval [seconds]: +/- 4.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .041 +/- .039) * 1 sigma uncertainty ellipse (major, minor, PA): ( .041", .039", 85° ) * approx speed of asteroid's shadow [km/s]: 19.7156 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6300-00626-1 by 1243 Pamela on 2009 Apr 4 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 - 9 0 0 -27 2 39 0 26 51 0 109 -68 -27 22 44 -26 42 34 -28 10 36 .. .. .. - 8 0 0 -27 20 54 0 26 51 1 109 -68 -27 40 57 -27 0 52 -28 28 41 -26 13 12 - 7 0 0 -27 38 42 0 26 51 2 108 -68 -27 58 42 -27 18 43 -28 46 19 -26 31 10 - 6 0 0 -27 56 2 0 26 51 3 108 -68 -28 15 59 -27 36 5 -29 3 29 -26 48 39 - 5 0 0 -28 12 54 0 26 52 4 107 -67 -28 32 48 -27 53 0 -29 20 12 -27 5 40 - 4 0 0 -28 29 18 0 26 52 5 107 -67 -28 49 9 -28 9 27 -29 36 27 -27 22 13 - 3 0 0 -28 45 14 0 26 52 6 106 -67 -29 5 3 -28 25 26 -29 52 14 -27 38 19 - 2 0 0 -29 0 42 0 26 53 7 106 -66 -29 20 28 -28 40 57 -30 7 33 -27 53 56 - 1 0 0 -29 15 43 0 26 54 8 105 -66 -29 35 26 -28 56 0 -30 22 25 -28 9 5 0 0 0 -29 30 15 0 26 54 8 105 -66 -29 49 56 -29 10 35 -30 36 49 -28 23 46 1 0 0 -29 44 20 0 26 55 9 104 -65 -30 3 59 -29 24 42 -30 50 46 -28 38 0 2 0 0 -29 57 57 0 26 56 10 104 -65 -30 17 34 -29 38 22 -31 4 14 -28 51 45 3 0 0 -30 11 7 0 26 57 11 103 -64 -30 30 41 -29 51 33 -31 17 16 -29 5 2 4 0 0 -30 23 48 0 26 58 12 103 -64 -30 43 20 -30 4 17 -31 29 50 -29 17 52 5 0 0 -30 36 2 0 26 59 13 102 -63 -30 55 32 -30 16 34 -31 41 56 -29 30 13 6 0 0 -30 47 49 0 27 0 14 102 -63 -31 7 16 -30 28 22 -31 53 35 -29 42 7 7 0 0 -30 59 8 0 27 1 15 101 -62 -31 18 32 -30 39 43 -32 4 47 -29 53 33 8 0 0 -31 9 59 0 27 3 16 101 -61 -31 29 22 -30 50 36 -32 15 31 -30 4 31 9 0 0 -31 20 23 0 27 4 16 100 -61 -31 39 43 -31 1 2 -32 25 48 -30 15 1 10 0 0 -31 30 19 0 27 6 17 100 -60 -31 49 38 -31 11 0 -32 35 38 -30 25 4 11 0 0 -31 39 48 0 27 7 18 99 -60 -31 59 5 -31 20 31 -32 45 1 -30 34 39 12 0 0 -31 48 49 0 27 9 19 99 -59 -32 8 5 -31 29 34 -32 53 56 -30 43 46 13 0 0 -31 57 24 0 27 10 20 98 -58 -32 16 37 -31 38 10 -33 2 25 -30 52 26 14 0 0 -32 5 31 0 27 12 21 97 -58 -32 24 43 -31 46 19 -33 10 27 -31 0 38 15 0 0 -32 13 10 0 27 14 22 97 -57 -32 32 21 -31 54 0 -33 18 1 -31 8 23 16 0 0 -32 20 23 0 27 16 23 96 -56 -32 39 32 -32 1 14 -33 25 9 -31 15 41 17 0 0 -32 27 9 0 27 18 23 96 -56 -32 46 16 -32 8 1 -33 31 50 -31 22 31 18 0 0 -32 33 27 0 27 20 24 95 -55 -32 52 34 -32 14 21 -33 38 4 -31 28 53 19 0 0 -32 39 18 0 27 22 25 95 -54 -32 58 24 -32 20 13 -33 43 52 -31 34 49 20 0 0 -32 44 43 0 27 24 26 94 -54 -33 3 47 -32 25 39 -33 49 13 -31 40 17 21 0 0 -32 49 40 0 27 26 27 94 -53 -33 8 44 -32 30 37 -33 54 7 -31 45 17 22 0 0 -32 54 11 0 27 28 28 93 -52 -33 13 13 -32 35 8 -33 58 34 -31 49 51 23 0 0 -32 58 14 0 27 30 29 93 -52 -33 17 16 -32 39 13 -34 2 35 -31 53 57 24 0 0 -33 1 51 0 27 33 29 92 -51 -33 20 52 -32 42 50 -34 6 9 -31 57 37 25 0 0 -33 5 1 0 27 35 30 91 -50 -33 24 1 -32 46 1 -34 9 17 -32 0 48 26 0 0 -33 7 44 0 27 37 31 91 -49 -33 26 43 -32 48 44 -34 11 58 -32 3 33 27 0 0 -33 10 0 0 27 40 32 90 -49 -33 28 59 -32 51 1 -34 14 12 -32 5 51 28 0 0 -33 11 49 0 27 43 33 90 -48 -33 30 48 -32 52 50 -34 16 0 -32 7 41 29 0 0 -33 13 11 0 27 45 34 89 -47 -33 32 10 -32 54 13 -34 17 21 -32 9 5 30 0 0 -33 14 6 0 27 48 34 89 -47 -33 33 5 -32 55 8 -34 18 16 -32 10 1 31 0 0 -33 14 35 0 27 51 35 88 -46 -33 33 33 -32 55 37 -34 18 44 -32 10 30 32 0 0 -33 14 37 0 27 53 36 87 -45 -33 33 35 -32 55 39 -34 18 46 -32 10 31 33 0 0 -33 14 11 0 27 56 37 87 -44 -33 33 10 -32 55 13 -34 18 21 -32 10 6 34 0 0 -33 13 19 0 27 59 38 86 -44 -33 32 18 -32 54 21 -34 17 29 -32 9 13 35 0 0 -33 12 0 0 28 2 39 86 -43 -33 30 59 -32 53 2 -34 16 11 -32 7 53 36 0 0 -33 10 14 0 28 5 40 85 -42 -33 29 13 -32 51 15 -34 14 26 -32 6 6 37 0 0 -33 8 1 0 28 8 40 84 -41 -33 27 0 -32 49 2 -34 12 14 -32 3 51 38 0 0 -33 5 21 0 28 11 41 84 -41 -33 24 21 -32 46 21 -34 9 36 -32 1 9 39 0 0 -33 2 13 0 28 15 42 83 -40 -33 21 14 -32 43 13 -34 6 31 -31 57 59 40 0 0 -32 58 39 0 28 18 43 83 -39 -33 17 40 -32 39 37 -34 2 58 -31 54 23 41 0 0 -32 54 37 0 28 21 44 82 -38 -33 13 39 -32 35 35 -33 58 59 -31 50 18 42 0 0 -32 50 8 0 28 25 45 82 -38 -33 9 11 -32 31 5 -33 54 33 -31 45 46 43 0 0 -32 45 11 0 28 28 46 81 -37 -33 4 16 -32 26 8 -33 49 40 -31 40 46 44 0 0 -32 39 48 0 28 32 46 80 -36 -32 58 53 -32 20 43 -33 44 20 -31 35 19 45 0 0 -32 33 56 0 28 35 47 80 -35 -32 53 3 -32 14 50 -33 38 33 -31 29 23 46 0 0 -32 27 37 0 28 39 48 79 -34 -32 46 45 -32 8 30 -33 32 18 -31 23 0 47 0 0 -32 20 51 0 28 42 49 79 -34 -32 40 0 -32 1 42 -33 25 36 -31 16 9 48 0 0 -32 13 36 0 28 46 50 78 -33 -32 32 47 -31 54 26 -33 18 27 -31 8 50 49 0 0 -32 5 54 0 28 50 51 77 -32 -32 25 6 -31 46 43 -33 10 50 -31 1 3 50 0 0 -31 57 44 0 28 54 52 77 -31 -32 16 58 -31 38 31 -33 2 45 -30 52 47 51 0 0 -31 49 6 0 28 58 52 76 -30 -32 8 22 -31 29 51 -32 54 13 -30 44 3 52 0 0 -31 40 0 0 29 2 53 75 -30 -31 59 17 -31 20 43 -32 45 13 -30 34 51 53 0 0 -31 30 26 0 29 6 54 75 -29 -31 49 45 -31 11 7 -32 35 45 -30 25 10 54 0 0 -31 20 23 0 29 10 55 74 -28 -31 39 44 -31 1 2 -32 25 49 -30 15 1 55 0 0 -31 9 52 0 29 14 56 74 -27 -31 29 15 -30 50 29 -32 15 24 -30 4 23 56 0 0 -30 58 52 0 29 18 57 73 -26 -31 18 18 -30 39 28 -32 4 32 -29 53 16 57 0 0 -30 47 24 0 29 22 58 72 -26 -31 6 52 -30 27 57 -31 53 11 -29 41 41 58 0 0 -30 35 27 0 29 27 59 72 -25 -30 54 57 -30 15 58 -31 41 22 -29 29 37 59 0 0 -30 23 2 0 29 31 60 71 -24 -30 42 34 -30 3 30 -31 29 5 -29 17 3 60 0 0 -30 10 7 0 29 35 60 70 -23 -30 29 42 -29 50 33 -31 16 18 -29 4 0 61 0 0 -29 56 44 0 29 40 61 70 -22 -30 16 21 -29 37 8 -31 3 3 -28 50 29 62 0 0 -29 42 52 0 29 44 62 69 -21 -30 2 31 -29 23 13 -30 49 20 -28 36 27 63 0 0 -29 28 30 0 29 49 63 68 -20 -29 48 12 -29 8 48 -30 35 7 -28 21 57 64 0 0 -29 13 39 0 29 54 64 68 -20 -29 33 24 -28 53 55 -30 20 25 -28 6 57 65 0 0 -28 58 19 0 29 58 65 67 -19 -29 18 7 -28 38 32 -30 5 14 -27 51 28 66 0 0 -28 42 30 0 30 3 66 66 -18 -29 2 20 -28 22 40 -29 49 34 -27 35 29 67 0 0 -28 26 11 0 30 8 67 65 -17 -28 46 4 -28 6 18 -29 33 25 -27 19 0 68 0 0 -28 9 22 0 30 13 68 64 -16 -28 29 18 -27 49 26 -29 16 47 -27 2 1 69 0 0 -27 52 4 0 30 18 69 64 -15 -28 12 3 -27 32 5 -28 59 39 -26 44 33 70 0 0 -27 34 17 0 30 23 70 63 -14 -27 54 19 -27 14 15 -28 42 2 -26 26 36 71 0 0 -27 16 0 0 30 28 71 62 -13 -27 36 5 -26 55 55 -28 23 55 -26 8 8 72 0 0 -26 57 13 0 30 33 72 61 -12 -27 17 21 -26 37 5 -28 5 19 -25 49 11 73 0 0 -26 37 56 0 30 38 72 60 -12 -26 58 8 -26 17 45 -27 46 13 -25 29 43 74 0 0 -26 18 10 0 30 44 73 59 -11 -26 38 25 -25 57 56 -27 26 38 -25 9 47 75 0 0 -25 57 55 0 30 49 74 58 -10 -26 18 13 -25 37 37 -27 6 34 -24 49 20 76 0 0 -25 37 10 0 30 54 75 57 -9 -25 57 31 -25 16 49 -26 46 0 -24 28 24 77 0 0 -25 15 55 0 31 0 76 55 -8 -25 36 20 -24 55 30 -26 24 56 -24 6 58 78 0 0 -24 54 11 0 31 5 77 54 -7 -25 14 39 -24 33 43 -26 3 23 -23 45 2 79 0 0 -24 31 57 0 31 11 78 52 -6 -24 52 29 -24 11 26 -25 41 21 -23 22 37 80 0 0 -24 9 14 0 31 16 79 50 -5 -24 29 49 -23 48 40 -25 18 50 -22 59 43 81 0 0 -23 46 2 0 31 22 80 48 -4 -24 6 41 -23 25 25 -24 55 49 -22 36 20 82 0 0 -23 22 22 0 31 28 81 45 -3 -23 43 3 -23 1 40 -24 32 20 -22 12 28 83 0 0 -22 58 12 0 31 33 82 42 -2 -23 18 57 -22 37 27 -24 8 22 -21 48 6 84 0 0 -22 33 34 0 31 39 83 38 -1 -22 54 22 -22 12 46 -23 43 55 -21 23 17 85 0 0 -22 8 27 0 31 45 84 33 0 -22 29 19 -21 47 35 -23 19 0 -20 57 59 Uncertainty in time = +/- 4 secs [Prediction of 2008 Mar 20.0] Data for the target star ------------------------ * name: TYC 6300-00626-1 * constellation : Sagittarius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 19 14 50.8440 DE: -16 57 23.209 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .035, .037 ) * V mag [mag]: 12.1 * B mag [mag]: 12.4 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1243) Pamela approx. diameter [km]: 70 approx. diameter ["]: .033 distance from Earth [AU]: 2.88400 * orbital information: orbit source: Preston date of fit: 2008 Mar 19 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 852 number of rejected observations: 53 time covered by the observations: 1932 Apr 04 - 2008 Feb 07 1 sigma uncertainty ellipse (major, minor, PA): 0.021, 0.012, 72° remarks: * orbital elements for (1243) Pamela : Mean anomaly = 323.70759958 deg Arg. of pericenter = 62.36673228 deg Long. of node = 245.97711753 deg Inclination = 13.26638410 deg Eccentricity = 0.04405233 Semimajor axis = 3.09813484 AU Perihelion dist = 2.96165478 AU Mag: H = 9.72, G = 0.15 Epoch of elements : MJD 54925.02200000 TDT (2009 Apr 04.022) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Apr 4 1243 Pamela 0h 32.2m UT 12.1 19 14 50.844-16 57 23.21TYC 6300-00626-1 12.4 15.3 70 3.6 2.884 2.145 14.28 88.1869 -16.960 172.72 5.67 0.5372 0.02524 -0.05121 10.09530 4.68172 -0.00573 -0.00071 2000 322.7999252009 330.00000 62.366732245.977118 13.2663840.04405233 3.0981348 2.9616548 9.7 5.00.15 RATE 1.8073970 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.041 0.039 85 2.19 0.040 0 54545.5020090404_0626-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 20, 06:46 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org