IOTA/IOTA-ES occultation update for (337) Devosa / TYC 6901-00903-1 event on 2009 Apr 04, 02:07 UT Visible from Summary ------- On 2009 Apr 04 UT, the 59 km diameter asteroid (337) Devosa will occult a 10.2 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 3.8 mag to 14.0 mag (the magnitude of the asteroid) for at most 3.0 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: 72 * date and approx. time of event: 2009 Apr 04, 02:02 - 2009 Apr 04, 02:07 UT * magnitude of target star: 10.2 * magnitude drop [mag]: 3.8 * estimated maximum duration [s]: 3.0 * Moon: 67 % sunlit, 164° distance * Sun: 84° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 60 * 1 sigma uncertainty interval [path widths]: +/- 0.80 * 1 sigma uncertainty interval [seconds]: +/- 2.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .025 +/- .025) * 1 sigma uncertainty ellipse (major, minor, PA): ( .025", .025", 86° ) * approx speed of asteroid's shadow [km/s]: 19.5726 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6901-00903-1 by 337 Devosa 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 - 25 0 0 -11 5 52 2 2 13 0 120 -83 -11 24 56 -10 46 50 -11 55 30 -10 16 26 - 24 0 0 -11 40 41 2 2 13 2 120 -82 -11 59 46 -11 21 38 -12 30 21 -10 51 13 - 23 0 0 -12 15 31 2 2 14 3 120 -81 -12 34 36 -11 56 27 -13 5 12 -11 26 1 - 22 0 0 -12 50 20 2 2 14 4 120 -80 -13 9 26 -12 31 16 -13 40 3 -12 0 48 - 21 0 0 -13 25 8 2 2 15 5 119 -78 -13 44 14 -13 6 3 -14 14 51 -12 35 35 - 20 0 0 -13 59 53 2 2 15 6 119 -77 -14 18 59 -13 40 48 -14 49 37 -13 10 20 - 19 0 0 -14 34 35 2 2 16 7 119 -76 -14 53 41 -14 15 30 -15 24 19 -13 45 1 - 18 0 0 -15 9 12 2 2 17 8 119 -75 -15 28 18 -14 50 7 -15 58 56 -14 19 38 - 17 0 0 -15 43 43 2 2 18 10 118 -74 -16 2 49 -15 24 38 -16 33 27 -14 54 10 - 16 0 0 -16 18 7 2 2 19 11 118 -73 -16 37 13 -15 59 3 -17 7 51 -15 28 35 - 15 0 0 -16 52 24 2 2 20 12 118 -72 -17 11 29 -16 33 20 -17 42 6 -16 2 52 - 14 0 0 -17 26 31 2 2 22 13 118 -71 -17 45 37 -17 7 28 -18 16 13 -16 37 1 - 13 0 0 -18 0 29 2 2 23 14 117 -69 -18 19 34 -17 41 26 -18 50 8 -17 11 1 - 12 0 0 -18 34 16 2 2 25 15 117 -68 -18 53 19 -18 15 13 -19 23 53 -17 44 49 - 11 0 0 -19 7 50 2 2 27 16 117 -67 -19 26 53 -18 48 49 -19 57 26 -18 18 26 - 10 0 0 -19 41 12 2 2 28 17 116 -66 -20 0 14 -19 22 12 -20 30 45 -18 51 51 - 9 0 0 -20 14 20 2 2 30 18 116 -65 -20 33 21 -19 55 21 -21 3 50 -19 25 2 - 8 0 0 -20 47 14 2 2 32 19 115 -64 -21 6 13 -20 28 16 -21 36 40 -19 57 59 - 7 0 0 -21 19 51 2 2 35 21 115 -63 -21 38 50 -21 0 55 -22 9 14 -20 30 40 - 6 0 0 -21 52 13 2 2 37 22 115 -62 -22 11 9 -21 33 18 -22 41 31 -21 3 5 - 5 0 0 -22 24 17 2 2 39 23 114 -61 -22 43 12 -22 5 23 -23 13 31 -21 35 13 - 4 0 0 -22 56 2 2 2 42 24 114 -60 -23 14 56 -22 37 11 -23 45 12 -22 7 3 - 3 0 0 -23 27 29 2 2 44 25 113 -59 -23 46 21 -23 8 39 -24 16 34 -22 38 35 - 2 0 0 -23 58 37 2 2 47 26 113 -58 -24 17 26 -23 39 49 -24 47 37 -23 9 47 - 1 0 0 -24 29 24 2 2 50 27 112 -57 -24 48 11 -24 10 38 -25 18 18 -23 40 39 0 0 0 -24 59 50 2 2 53 28 112 -55 -25 18 35 -24 41 6 -25 48 39 -24 11 11 1 0 0 -25 29 54 2 2 55 29 111 -54 -25 48 37 -25 11 12 -26 18 37 -24 41 21 2 0 0 -25 59 36 2 2 58 30 111 -53 -26 18 17 -25 40 57 -26 48 13 -25 11 9 3 0 0 -26 28 55 2 3 1 31 110 -52 -26 47 34 -26 10 18 -27 17 26 -25 40 34 4 0 0 -26 57 51 2 3 5 32 110 -51 -27 16 27 -26 39 17 -27 46 16 -26 9 36 5 0 0 -27 26 23 2 3 8 33 109 -50 -27 44 56 -27 7 51 -28 14 41 -26 38 15 6 0 0 -27 54 31 2 3 11 34 109 -49 -28 13 2 -27 36 1 -28 42 42 -27 6 29 7 0 0 -28 22 13 2 3 14 35 108 -48 -28 40 42 -28 3 47 -29 10 18 -27 34 19 8 0 0 -28 49 31 2 3 18 36 108 -47 -29 7 57 -28 31 7 -29 37 29 -28 1 43 9 0 0 -29 16 23 2 3 21 37 107 -46 -29 34 46 -28 58 2 -30 4 13 -28 28 43 10 0 0 -29 42 49 2 3 25 38 106 -45 -30 1 9 -29 24 31 -30 30 32 -28 55 16 11 0 0 -30 8 49 2 3 28 39 106 -44 -30 27 6 -29 50 33 -30 56 25 -29 21 23 12 0 0 -30 34 22 2 3 32 40 105 -43 -30 52 37 -30 16 10 -31 21 50 -29 47 4 13 0 0 -30 59 29 2 3 36 41 104 -42 -31 17 40 -30 41 19 -31 46 49 -30 12 18 14 0 0 -31 24 8 2 3 39 42 104 -41 -31 42 17 -31 6 1 -32 11 21 -30 37 5 15 0 0 -31 48 20 2 3 43 43 103 -40 -32 6 26 -31 30 16 -32 35 25 -31 1 25 16 0 0 -32 12 5 2 3 47 44 102 -40 -32 30 7 -31 54 4 -32 59 2 -31 25 17 17 0 0 -32 35 22 2 3 51 45 102 -39 -32 53 22 -32 17 24 -33 22 11 -31 48 42 18 0 0 -32 58 12 2 3 54 45 101 -38 -33 16 8 -32 40 17 -33 44 53 -32 11 39 19 0 0 -33 20 33 2 3 58 46 100 -37 -33 38 26 -33 2 41 -34 7 7 -32 34 8 20 0 0 -33 42 27 2 4 2 47 99 -36 -34 0 17 -33 24 38 -34 28 52 -32 56 10 21 0 0 -34 3 52 2 4 6 48 98 -35 -34 21 40 -33 46 6 -34 50 10 -33 17 43 22 0 0 -34 24 50 2 4 10 49 98 -34 -34 42 34 -34 7 7 -35 11 0 -33 38 48 23 0 0 -34 45 19 2 4 14 50 97 -33 -35 3 0 -34 27 39 -35 31 21 -33 59 26 24 0 0 -35 5 20 2 4 18 51 96 -32 -35 22 59 -34 47 43 -35 51 15 -34 19 35 25 0 0 -35 24 53 2 4 22 52 95 -31 -35 42 29 -35 7 19 -36 10 40 -34 39 15 26 0 0 -35 43 59 2 4 26 52 94 -30 -36 1 31 -35 26 27 -36 29 37 -34 58 28 27 0 0 -36 2 35 2 4 31 53 93 -30 -36 20 5 -35 45 7 -36 48 7 -35 17 12 28 0 0 -36 20 44 2 4 35 54 92 -29 -36 38 11 -36 3 19 -37 6 8 -35 35 29 29 0 0 -36 38 25 2 4 39 55 91 -28 -36 55 49 -36 21 3 -37 23 41 -35 53 17 30 0 0 -36 55 38 2 4 43 56 90 -27 -37 12 59 -36 38 18 -37 40 47 -36 10 37 31 0 0 -37 12 23 2 4 47 57 89 -26 -37 29 41 -36 55 6 -37 57 25 -36 27 30 32 0 0 -37 28 41 2 4 51 57 88 -25 -37 45 56 -37 11 26 -38 13 35 -36 43 54 33 0 0 -37 44 30 2 4 55 58 87 -24 -38 1 43 -37 27 19 -38 29 18 -36 59 50 34 0 0 -37 59 52 2 5 0 59 86 -24 -38 17 2 -37 42 43 -38 44 33 -37 15 19 35 0 0 -38 14 46 2 5 4 60 85 -23 -38 31 54 -37 57 40 -38 59 20 -37 30 20 36 0 0 -38 29 13 2 5 8 61 84 -22 -38 46 18 -38 12 10 -39 13 41 -37 44 54 37 0 0 -38 43 13 2 5 12 61 82 -21 -39 0 16 -38 26 12 -39 27 34 -37 59 0 38 0 0 -38 56 46 2 5 17 62 81 -20 -39 13 46 -38 39 47 -39 41 0 -38 12 39 39 0 0 -39 9 51 2 5 21 63 80 -19 -39 26 49 -38 52 55 -39 53 59 -38 25 51 40 0 0 -39 22 30 2 5 25 63 78 -19 -39 39 25 -39 5 36 -40 6 32 -38 38 35 41 0 0 -39 34 41 2 5 29 64 77 -18 -39 51 34 -39 17 49 -40 18 37 -38 50 53 42 0 0 -39 46 26 2 5 34 65 76 -17 -40 3 17 -39 29 37 -40 30 17 -39 2 43 43 0 0 -39 57 45 2 5 38 66 74 -16 -40 14 33 -39 40 57 -40 41 29 -39 14 7 44 0 0 -40 8 36 2 5 42 66 73 -15 -40 25 23 -39 51 51 -40 52 16 -39 25 4 45 0 0 -40 19 2 2 5 46 67 71 -15 -40 35 46 -40 2 18 -41 2 36 -39 35 35 46 0 0 -40 29 1 2 5 51 68 69 -14 -40 45 44 -40 12 19 -41 12 30 -39 45 39 47 0 0 -40 38 34 2 5 55 68 67 -13 -40 55 15 -40 21 54 -41 21 59 -39 55 17 48 0 0 -40 47 41 2 5 59 69 66 -12 -41 4 20 -40 31 3 -41 31 1 -40 4 29 49 0 0 -40 56 22 2 6 3 70 64 -11 -41 13 0 -40 39 46 -41 39 38 -40 13 14 50 0 0 -41 4 38 2 6 8 70 62 -11 -41 21 14 -40 48 3 -41 47 49 -40 21 34 51 0 0 -41 12 28 2 6 12 71 60 -10 -41 29 2 -40 55 54 -41 55 35 -40 29 28 52 0 0 -41 19 52 2 6 16 71 58 -9 -41 36 24 -41 3 20 -42 2 55 -40 36 55 53 0 0 -41 26 50 2 6 21 72 55 -8 -41 43 22 -41 10 20 -42 9 50 -40 43 58 54 0 0 -41 33 24 2 6 25 72 53 -8 -41 49 54 -41 16 55 -42 16 20 -40 50 34 55 0 0 -41 39 32 2 6 29 73 50 -7 -41 56 0 -41 23 4 -42 22 25 -40 56 46 56 0 0 -41 45 15 2 6 33 74 48 -6 -42 1 42 -41 28 48 -42 28 4 -41 2 31 57 0 0 -41 50 32 2 6 38 74 45 -5 -42 6 59 -41 34 7 -42 33 19 -41 7 52 58 0 0 -41 55 25 2 6 42 74 42 -5 -42 11 50 -41 39 0 -42 38 9 -41 12 47 59 0 0 -41 59 52 2 6 46 75 39 -4 -42 16 17 -41 43 29 -42 42 35 -41 17 17 60 0 0 -42 3 55 2 6 51 75 36 -3 -42 20 19 -41 47 32 -42 46 35 -41 21 22 61 0 0 -42 7 33 2 6 55 76 33 -2 -42 23 56 -41 51 11 -42 50 11 -41 25 2 62 0 0 -42 10 46 2 6 59 76 29 -2 -42 27 9 -41 54 25 -42 53 22 -41 28 17 63 0 0 -42 13 35 2 7 3 76 26 -1 -42 29 56 -41 57 14 -42 56 9 -41 31 6 64 0 0 -42 15 58 2 7 8 77 22 0 -42 32 19 -41 59 38 -42 58 32 -41 33 31 Uncertainty in time = +/- 2 secs [Prediction of 2008 Mar 20.0] Data for the target star ------------------------ * name: TYC 6901-00903-1 * constellation : Sagittarius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 19 35 14.9196 DE: -29 48 50.145 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .021, .024 ) * V mag [mag]: 10.2 * B mag [mag]: 11.6 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (337) Devosa approx. diameter [km]: 59 approx. diameter ["]: .031 distance from Earth [AU]: 2.63300 * orbital information: orbit source: Preston date of fit: 2008 Mar 19 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 917 number of rejected observations: 116 time covered by the observations: 1903 Sep 23 - 2008 Feb 12 1 sigma uncertainty ellipse (major, minor, PA): 0.014, 0.008, 77° remarks: * orbital elements for (337) Devosa : Mean anomaly = 173.64187407 deg Arg. of pericenter = 98.28651559 deg Long. of node = 355.54469750 deg Inclination = 7.85042308 deg Eccentricity = 0.13810862 Semimajor axis = 2.38304197 AU Perihelion dist = 2.05392333 AU Mag: H = 8.68, G = 0.19 Epoch of elements : MJD 54925.08800000 TDT (2009 Apr 04.088) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Apr 4 337 Devosa 2h 7.5m UT 10.2 19 35 14.920-29 48 50.15TYC 6901-00903-1 11.6 14.0 59 3.0 2.633 2.835 0.07 69.3973 -29.814 148.89 5.70 2.1255 0.00107 -0.21404 11.04731 0.02068 -0.00559 -0.00100 2000 172.2786932009 330.00000 98.286516355.544697 7.8504230.13810862 2.3830420 2.0539233 8.7 5.00.19 RATE 2.6792080 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.025 0.025 86 1.80 0.025 0 54545.5020090404_0903-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 20, 06:47 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org