IOTA/IOTA-ES occultation update for (337) Devosa / TYC 7409-01693-1 event on 2009 Sep 03, 18:27 UT Visible from Summary ------- On 2009 Sep 03 UT, the 59 km diameter asteroid (337) Devosa will occult a 11.8 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 1.8 mag to 13.3 mag (the magnitude of the asteroid) for at most 13.3 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: 76 * date and approx. time of event: 2009 Sep 03, 18:10 - 2009 Sep 03, 18:49 UT * magnitude of target star: 11.8 * magnitude drop [mag]: 1.8 * estimated maximum duration [s]: 13.3 * Moon: 99 % sunlit, 50° distance * Sun: 120° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 60 * 1 sigma uncertainty interval [path widths]: +/- 0.74 * 1 sigma uncertainty interval [seconds]: +/- 8.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .030 +/- .026) * 1 sigma uncertainty ellipse (major, minor, PA): ( .030", .026", 87° ) * approx speed of asteroid's shadow [km/s]: 4.4442 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 7409-01693-1 by 337 Devosa on 2009 Sep 3 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 14 16 42 58 0 0 18 49 29 1 177 -8 14 47 3 13 46 20 15 31 53 13 1 18 14 22 57 57 0 0 18 49 29 2 177 -8 14 52 27 13 53 24 15 36 4 13 9 37 14 28 35 56 0 0 18 49 28 3 177 -9 14 57 18 13 59 49 15 39 46 13 17 11 14 33 39 55 0 0 18 49 26 4 177 -9 15 1 39 14 5 37 15 43 2 13 24 5 14 38 14 54 0 0 18 49 25 5 177 -9 15 5 32 14 10 53 15 45 55 13 30 22 14 42 21 53 0 0 18 49 22 6 177 -10 15 9 1 14 15 39 15 48 27 13 36 5 14 46 3 52 0 0 18 49 20 7 177 -10 15 12 7 14 19 58 15 50 39 13 41 18 14 49 22 51 0 0 18 49 16 8 177 -11 15 14 52 14 23 51 15 52 33 13 46 3 14 52 21 50 0 0 18 49 13 9 177 -11 15 17 18 14 27 23 15 54 12 13 50 22 14 55 1 49 0 0 18 49 9 10 177 -12 15 19 27 14 30 33 15 55 36 13 54 18 14 57 23 48 0 0 18 49 4 11 177 -12 15 21 21 14 33 24 15 56 47 13 57 52 14 59 29 47 0 0 18 48 59 12 177 -13 15 23 0 14 35 58 15 57 45 14 1 7 15 1 21 46 0 0 18 48 54 13 177 -13 15 24 26 14 38 15 15 58 33 14 4 3 15 2 59 45 0 0 18 48 48 14 177 -14 15 25 39 14 40 18 15 59 10 14 6 42 15 4 24 44 0 0 18 48 42 15 177 -14 15 26 41 14 42 7 15 59 38 14 9 5 15 5 38 43 0 0 18 48 36 16 177 -14 15 27 33 14 43 43 15 59 57 14 11 14 15 6 41 42 0 0 18 48 28 17 177 -15 15 28 15 14 45 6 16 0 8 14 13 9 15 7 34 41 0 0 18 48 21 18 177 -15 15 28 48 14 46 19 16 0 12 14 14 51 15 8 17 40 0 0 18 48 13 19 177 -16 15 29 12 14 47 22 16 0 8 14 16 21 15 8 52 39 0 0 18 48 5 20 177 -16 15 29 29 14 48 14 15 59 58 14 17 41 15 9 19 38 0 0 18 47 56 21 177 -16 15 29 39 14 48 58 15 59 43 14 18 50 15 9 37 37 0 0 18 47 47 22 177 -17 15 29 41 14 49 33 15 59 21 14 19 49 15 9 49 36 0 0 18 47 37 23 177 -17 15 29 37 14 50 0 15 58 54 14 20 39 15 9 53 35 0 0 18 47 27 24 177 -17 15 29 27 14 50 19 15 58 22 14 21 20 15 9 51 34 0 0 18 47 17 25 177 -18 15 29 11 14 50 31 15 57 46 14 21 52 15 9 43 33 0 0 18 47 6 26 176 -18 15 28 49 14 50 36 15 57 4 14 22 17 15 9 29 32 0 0 18 46 55 27 176 -18 15 28 22 14 50 34 15 56 19 14 22 34 15 9 9 31 0 0 18 46 43 28 176 -19 15 27 50 14 50 26 15 55 29 14 22 44 15 8 43 30 0 0 18 46 31 29 176 -19 15 27 13 14 50 12 15 54 35 14 22 47 15 8 12 29 0 0 18 46 19 30 176 -19 15 26 31 14 49 52 15 53 37 14 22 43 15 7 36 28 0 0 18 46 6 31 176 -20 15 25 45 14 49 26 15 52 35 14 22 32 15 6 54 27 0 0 18 45 53 32 176 -20 15 24 54 14 48 55 15 51 30 14 22 15 15 6 8 26 0 0 18 45 40 33 176 -20 15 23 58 14 48 17 15 50 20 14 21 52 15 5 17 25 0 0 18 45 26 34 176 -20 15 22 58 14 47 35 15 49 7 14 21 22 15 4 20 24 0 0 18 45 11 35 176 -21 15 21 53 14 46 47 15 47 50 14 20 46 15 3 19 23 0 0 18 44 57 36 175 -21 15 20 44 14 45 53 15 46 30 14 20 4 15 2 13 22 0 0 18 44 42 37 175 -21 15 19 30 14 44 54 15 45 5 14 19 16 15 1 1 21 0 0 18 44 26 38 175 -21 15 18 12 14 43 50 15 43 37 14 18 23 14 59 45 20 0 0 18 44 11 39 175 -22 15 16 49 14 42 40 15 42 4 14 17 23 14 58 24 19 0 0 18 43 55 40 175 -22 15 15 22 14 41 25 15 40 28 14 16 17 14 56 58 18 0 0 18 43 38 40 175 -22 15 13 50 14 40 5 15 38 47 14 15 4 14 55 26 17 0 0 18 43 22 41 174 -22 15 12 13 14 38 38 15 37 2 14 13 46 14 53 49 16 0 0 18 43 4 42 174 -22 15 10 31 14 37 6 15 35 12 14 12 22 14 52 6 15 0 0 18 42 47 43 174 -23 15 8 44 14 35 29 15 33 18 14 10 50 14 50 18 14 0 0 18 42 29 44 174 -23 15 6 51 14 33 45 15 31 19 14 9 13 14 48 24 13 0 0 18 42 11 45 174 -23 15 4 53 14 31 54 15 29 16 14 7 29 14 46 24 12 0 0 18 41 53 46 173 -23 15 2 49 14 29 58 15 27 7 14 5 37 14 44 18 11 0 0 18 41 34 47 173 -23 15 0 40 14 27 55 15 24 52 14 3 39 14 42 5 10 0 0 18 41 15 48 173 -23 14 58 24 14 25 45 15 22 32 14 1 34 14 39 46 9 0 0 18 40 56 49 172 -23 14 56 2 14 23 28 15 20 6 13 59 21 14 37 19 8 0 0 18 40 37 50 172 -23 14 53 34 14 21 4 15 17 34 13 57 0 14 34 46 7 0 0 18 40 17 51 172 -23 14 50 58 14 18 33 15 14 56 13 54 31 14 32 4 6 0 0 18 39 57 52 171 -24 14 48 15 14 15 53 15 12 11 13 51 54 14 29 15 5 0 0 18 39 36 53 171 -24 14 45 25 14 13 5 15 9 18 13 49 8 14 26 18 4 0 0 18 39 16 54 171 -24 14 42 27 14 10 9 15 6 19 13 46 14 14 23 13 3 0 0 18 38 55 55 170 -24 14 39 20 14 7 4 15 3 11 13 43 9 14 19 58 2 0 0 18 38 33 56 170 -24 14 36 5 14 3 50 14 59 56 13 39 56 14 16 34 1 0 0 18 38 12 57 169 -24 14 32 41 14 0 26 14 56 32 13 36 32 14 13 1 0 0 0 18 37 50 58 169 -24 14 29 8 13 56 52 14 52 59 13 32 58 14 9 17 - 1 0 0 18 37 28 59 168 -24 14 25 25 13 53 8 14 49 16 13 29 13 14 5 23 - 2 0 0 18 37 6 60 168 -24 14 21 32 13 49 13 14 45 24 13 25 16 14 1 17 - 3 0 0 18 36 44 61 167 -24 14 17 27 13 45 6 14 41 22 13 21 8 13 57 0 - 4 0 0 18 36 21 62 166 -24 14 13 12 13 40 48 14 37 8 13 16 47 13 52 31 - 5 0 0 18 35 58 63 165 -23 14 8 44 13 36 16 14 32 44 13 12 13 13 47 49 - 6 0 0 18 35 35 63 165 -23 14 4 5 13 31 32 14 28 7 13 7 25 13 42 54 - 7 0 0 18 35 12 64 164 -23 13 59 12 13 26 35 14 23 18 13 2 24 13 37 45 - 8 0 0 18 34 49 65 163 -23 13 54 6 13 21 23 14 18 16 12 57 8 13 32 21 - 9 0 0 18 34 25 66 162 -23 13 48 45 13 15 56 14 13 0 12 51 36 13 26 42 -10 0 0 18 34 1 67 161 -23 13 43 10 13 10 13 14 7 30 12 45 48 13 20 47 -11 0 0 18 33 37 68 159 -23 13 37 18 13 4 14 14 1 44 12 39 43 13 14 35 -12 0 0 18 33 13 69 158 -23 13 31 11 12 57 58 13 55 43 12 33 21 13 8 6 -13 0 0 18 32 49 70 157 -23 13 24 46 12 51 24 13 49 25 12 26 40 13 1 18 -14 0 0 18 32 24 70 155 -22 13 18 3 12 44 31 13 42 50 12 19 39 12 54 10 -15 0 0 18 32 0 71 153 -22 13 11 1 12 37 18 13 35 56 12 12 18 12 46 43 -16 0 0 18 31 35 72 151 -22 13 3 40 12 29 45 13 28 43 12 4 36 12 38 54 -17 0 0 18 31 10 73 149 -22 12 55 57 12 21 50 13 21 9 11 56 32 12 30 43 -18 0 0 18 30 45 73 147 -22 12 47 53 12 13 32 13 13 14 11 48 4 12 22 8 -19 0 0 18 30 20 74 144 -21 12 39 25 12 4 50 13 4 57 11 39 11 12 13 9 -20 0 0 18 29 55 75 142 -21 12 30 33 11 55 43 12 56 17 11 29 53 12 3 43 -21 0 0 18 29 29 75 139 -21 12 21 16 11 46 10 12 47 11 11 20 7 11 53 51 -22 0 0 18 29 4 76 135 -21 12 11 32 11 36 8 12 37 40 11 9 53 11 43 30 -23 0 0 18 28 38 76 132 -20 12 1 20 11 25 38 12 27 41 10 59 9 11 32 38 -24 0 0 18 28 13 77 128 -20 11 50 38 11 14 37 12 17 13 10 47 53 11 21 15 -25 0 0 18 27 47 77 124 -20 11 39 25 11 3 3 12 6 15 10 36 4 11 9 18 -26 0 0 18 27 21 77 119 -19 11 27 39 10 50 55 11 54 45 10 23 41 10 56 46 -27 0 0 18 26 55 78 115 -19 11 15 18 10 38 12 11 42 41 10 10 40 10 43 36 -28 0 0 18 26 29 78 110 -19 11 2 20 10 24 50 11 30 1 9 57 0 10 29 47 -29 0 0 18 26 3 78 106 -19 10 48 44 10 10 48 11 16 44 9 42 39 10 15 17 -30 0 0 18 25 37 78 101 -18 10 34 27 9 56 4 11 2 47 9 27 34 10 0 2 -31 0 0 18 25 11 77 96 -18 10 19 27 9 40 35 10 48 7 9 11 44 9 44 1 -32 0 0 18 24 45 77 92 -17 10 3 41 9 24 19 10 32 43 8 55 5 9 27 10 -33 0 0 18 24 19 77 88 -17 9 47 6 9 7 12 10 16 32 8 37 34 9 9 28 -34 0 0 18 23 52 76 84 -17 9 29 40 8 49 12 9 59 31 8 19 9 8 50 49 -35 0 0 18 23 26 76 80 -16 9 11 20 8 30 16 9 41 37 7 59 45 8 31 12 -36 0 0 18 23 0 75 77 -16 8 52 1 8 10 19 9 22 46 7 39 20 8 10 31 -37 0 0 18 22 33 75 74 -16 8 31 41 7 49 18 9 2 55 7 17 49 7 48 44 -38 0 0 18 22 7 74 71 -15 8 10 15 7 27 10 8 42 0 6 55 8 7 25 45 -39 0 0 18 21 41 73 68 -15 7 47 39 7 3 48 8 19 57 6 31 13 7 1 30 -40 0 0 18 21 14 73 66 -14 7 23 47 6 39 9 7 56 41 6 5 57 6 35 53 -41 0 0 18 20 48 72 64 -14 6 58 36 6 13 6 7 32 7 5 39 16 6 8 48 -42 0 0 18 20 22 71 62 -13 6 31 59 5 45 34 7 6 9 5 11 3 5 40 10 -43 0 0 18 19 56 70 61 -13 6 3 49 5 16 27 6 38 42 4 41 12 5 9 50 -44 0 0 18 19 29 69 60 -12 5 34 0 4 45 36 6 9 38 4 9 34 Latitude Latitude Latitude Latitude 4 0 0 -46 6 6 18 18 34 67 57 -11 -46 48 57 -45 22 42 -47 51 28 -44 17 28 3 0 0 -47 42 56 18 17 52 66 56 -11 -48 23 23 -47 2 3 -49 22 28 -46 0 41 2 0 0 -49 10 52 18 17 13 64 55 -10 -49 49 13 -48 32 8 -50 45 19 -47 34 6 1 0 0 -50 31 9 18 16 38 63 55 -9 -51 7 40 -49 54 18 -52 1 9 -48 59 8 0 0 0 -51 44 47 18 16 6 62 54 -8 -52 19 41 -51 9 36 -53 10 51 -50 16 58 - 1 0 0 -52 52 36 18 15 36 60 54 -8 -53 26 4 -52 18 53 -54 15 10 -51 28 31 - 2 0 0 -53 55 18 18 15 9 59 55 -7 -54 27 29 -53 22 54 -55 14 43 -52 34 31 - 3 0 0 -54 53 26 18 14 43 58 55 -6 -55 24 27 -54 22 13 -56 10 0 -53 35 39 - 4 0 0 -55 47 29 18 14 19 57 55 -6 -56 17 27 -55 17 21 -57 1 29 -54 32 25 - 5 0 0 -56 37 53 18 13 57 56 55 -5 -57 6 53 -56 8 43 -57 49 31 -55 25 16 - 6 0 0 -57 24 58 18 13 36 55 56 -5 -57 53 5 -56 56 42 -58 34 27 -56 14 36 - 7 0 0 -58 9 2 18 13 16 54 56 -4 -58 36 21 -57 41 36 -59 16 33 -57 0 44 - 8 0 0 -58 50 23 18 12 58 54 57 -4 -59 16 57 -58 23 42 -59 56 4 -57 43 58 - 9 0 0 -59 29 13 18 12 41 53 58 -3 -59 55 6 -59 3 14 -60 33 12 -58 24 34 - 10 0 0 -60 5 45 18 12 24 52 58 -3 -60 31 0 -59 40 25 -61 8 11 -59 2 43 - 11 0 0 -60 40 10 18 12 8 51 59 -3 -61 4 49 -60 15 26 -61 41 8 -59 38 39 - 12 0 0 -61 12 38 18 11 53 51 59 -2 -61 36 44 -60 48 28 -62 12 15 -60 12 31 - 13 0 0 -61 43 17 18 11 39 50 60 -2 -62 6 52 -61 19 38 -62 41 38 -60 44 28 - 14 0 0 -62 12 15 18 11 26 49 61 -1 -62 35 21 -61 49 5 -63 9 24 -61 14 40 - 15 0 0 -62 39 40 18 11 13 49 62 -1 -63 2 18 -62 16 57 -63 35 42 -61 43 12 - 16 0 0 -63 5 36 18 11 0 48 62 -1 -63 27 49 -62 43 19 -64 0 35 -62 10 13 - 17 0 0 -63 30 10 18 10 49 47 63 0 -63 51 59 -63 8 17 -64 24 10 -62 35 47 Uncertainty in time = +/- 10 secs [Prediction of 2008 Mar 20.0] Data for the target star ------------------------ * name: TYC 7409-01693-1 * constellation : Sagittarius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 18 54 04.9238 DE: -31 24 29.655 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .023, .023 ) * V mag [mag]: 11.8 * B mag [mag]: 12.8 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (337) Devosa approx. diameter [km]: 59 approx. diameter ["]: .040 distance from Earth [AU]: 2.01500 * orbital information: orbit source: Preston date of fit: 2008 Mar 20 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): 0.019, 0.012, 83° remarks: * orbital elements for (337) Devosa : Mean anomaly = 214.55230505 deg Arg. of pericenter = 98.27691026 deg Long. of node = 355.53027310 deg Inclination = 7.85118120 deg Eccentricity = 0.13760633 Semimajor axis = 2.38408204 AU Perihelion dist = 2.05601727 AU Mag: H = 8.68, G = 0.19 Epoch of elements : MJD 55077.76900000 TDT (2009 Sep 03.769) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Sep 3 337 Devosa 18h 26.1m UT 11.8 18 54 4.924-31 24 29.65TYC 7409-01693-1 12.8 13.3 59 13.3 2.015 0.149 10.78 23.9621 -31.411 -96.73 7.29 18.4358 -0.20594 0.03565 0.43241 2.47089 0.00475 0.00087 2000 212.4721902009 827.00000 98.276910355.530273 7.8511810.13760633 2.3840820 2.0560173 8.7 5.00.19 RATE 2.6774550 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.030 0.026 87 1.74 0.030 0 54545.5020090903_1693-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 20, 12:51 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org