IOTA/IOTA-ES occultation update for (1048) Feodosia / TYC 6836-00230-1 event on 2008 Apr 02, 09:35 UT Visible from Argentina, Chile Summary ------- On 2008 Apr 02 UT, the 60 km diameter asteroid (1048) Feodosia will occult a 10.0 mag star in the constellation Sagittarius for observers along a path across Argentina, Chile. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.9 mag to 13.9 mag (the magnitude of the asteroid) for at most 4.5 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: 78 * date and approx. time of event: 2008 Apr 02, 09:27 - 2008 Apr 02, 09:38 UT * magnitude of target star: 10.0 * magnitude drop [mag]: 3.9 * estimated maximum duration [s]: 4.5 * Moon: 18 % sunlit, 56° distance * Sun: 105° distance * rough path description: Argentina, Chile The occultation path -------------------- * approximate projected width [km]: 62 * 1 sigma uncertainty interval [path widths]: +/- 0.70 * 1 sigma uncertainty interval [seconds]: +/- 3.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .045 +/- .032) * 1 sigma uncertainty ellipse (major, minor, PA): ( .046", .031", 99° ) * approx speed of asteroid's shadow [km/s]: 13.4605 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6836-00230-1 by 1048 Feodosia on 2008 Apr 2 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 -145 46 18 14 0 0 9 27 15 2 118 -70 -146 22 34 -145 10 25 -147 14 2 -144 20 48 -143 56 58 13 0 0 9 27 16 4 119 -72 -144 31 56 -143 22 20 -145 21 30 -142 34 23 -142 12 22 12 0 0 9 27 18 6 119 -73 -142 46 13 -141 38 50 -143 34 7 -140 52 21 -140 31 58 11 0 0 9 27 20 8 119 -74 -141 4 48 -139 59 23 -141 51 16 -139 14 12 -138 55 17 10 0 0 9 27 22 10 120 -75 -139 27 15 -138 23 34 -140 12 25 -137 39 32 -137 21 57 9 0 0 9 27 25 12 120 -75 -137 53 7 -136 50 59 -138 37 9 -136 7 59 -135 51 36 8 0 0 9 27 28 13 120 -76 -136 22 5 -135 21 19 -137 5 6 -134 39 15 -134 23 58 7 0 0 9 27 32 15 120 -76 -134 53 50 -133 54 18 -135 35 56 -133 13 3 -132 58 48 6 0 0 9 27 36 17 120 -76 -133 28 5 -132 29 41 -134 9 22 -131 49 10 -131 35 51 5 0 0 9 27 40 19 120 -76 -132 4 38 -131 7 13 -132 45 11 -130 27 23 -130 14 56 4 0 0 9 27 45 20 120 -76 -130 43 15 -129 46 45 -131 23 9 -129 7 31 -128 55 52 3 0 0 9 27 50 22 120 -75 -129 23 46 -128 28 5 -130 3 4 -127 49 24 -127 38 28 2 0 0 9 27 56 24 120 -75 -128 6 0 -127 11 3 -128 44 46 -126 32 51 -126 22 37 1 0 0 9 28 2 25 120 -74 -126 49 49 -125 55 32 -127 28 5 -125 17 46 -125 8 10 0 0 0 9 28 8 27 120 -73 -125 35 4 -124 41 22 -126 12 54 -124 4 0 -123 54 59 - 1 0 0 9 28 14 28 120 -72 -124 21 37 -123 28 27 -124 59 4 -122 51 27 Latitude Latitude Latitude Latitude -123 0 0 - 1 45 44 9 28 19 29 120 -72 - 2 7 50 - 1 23 40 - 2 38 53 - 0 52 53 -122 0 0 - 2 36 13 9 28 25 31 120 -71 - 2 58 27 - 2 14 3 - 3 29 40 - 1 43 6 -121 0 0 - 3 27 19 9 28 31 32 120 -70 - 3 49 40 - 3 5 2 - 4 21 2 - 2 33 56 -120 0 0 - 4 18 59 9 28 37 33 119 -69 - 4 41 26 - 3 56 36 - 5 12 58 - 3 25 20 -119 0 0 - 5 11 12 9 28 43 35 119 -68 - 5 33 45 - 4 48 41 - 6 5 26 - 4 17 17 -118 0 0 - 6 3 54 9 28 50 36 119 -67 - 6 26 33 - 5 41 17 - 6 58 23 - 5 9 44 -117 0 0 - 6 57 4 9 28 57 37 119 -66 - 7 19 49 - 6 34 21 - 7 51 47 - 6 2 40 -116 0 0 - 7 50 39 9 29 4 39 118 -65 - 8 13 30 - 7 27 51 - 8 45 36 - 6 56 2 -115 0 0 - 8 44 37 9 29 11 40 118 -64 - 9 7 34 - 8 21 44 - 9 39 48 - 7 49 47 -114 0 0 - 9 38 56 9 29 19 41 117 -62 -10 1 58 - 9 15 57 -10 34 18 - 8 43 54 -113 0 0 -10 33 32 9 29 27 43 117 -61 -10 56 38 -10 10 29 -11 29 6 - 9 38 19 -112 0 0 -11 28 23 9 29 35 44 116 -60 -11 51 34 -11 5 15 -12 24 8 -10 32 59 -111 0 0 -12 23 26 9 29 43 45 116 -59 -12 46 41 -12 0 14 -13 19 21 -11 27 52 -110 0 0 -13 18 38 9 29 51 47 115 -58 -13 41 57 -12 55 23 -14 14 42 -12 22 56 -109 0 0 -14 13 56 9 30 0 48 114 -57 -14 37 18 -13 50 38 -15 10 8 -13 18 6 -108 0 0 -15 9 18 9 30 9 49 114 -55 -15 32 43 -14 45 56 -16 5 36 -14 13 21 -107 0 0 -16 4 39 9 30 18 50 113 -54 -16 28 7 -15 41 15 -17 1 3 -15 8 36 -106 0 0 -16 59 57 9 30 27 52 112 -53 -17 23 27 -16 36 32 -17 56 27 -16 3 50 -105 0 0 -17 55 10 9 30 36 53 111 -52 -18 18 41 -17 31 42 -18 51 43 -16 58 58 -104 0 0 -18 50 13 9 30 45 54 110 -51 -19 13 45 -18 26 44 -19 46 48 -17 53 58 -103 0 0 -19 45 3 9 30 55 55 109 -50 -20 8 36 -19 21 34 -20 41 41 -18 48 47 -102 0 0 -20 39 39 9 31 4 57 108 -48 -21 3 12 -20 16 10 -21 36 17 -19 43 22 -101 0 0 -21 33 57 9 31 14 58 107 -47 -21 57 30 -21 10 27 -22 30 34 -20 37 40 -100 0 0 -22 27 53 9 31 23 59 105 -46 -22 51 25 -22 4 25 -23 24 29 -21 31 38 - 99 0 0 -23 21 26 9 31 33 60 104 -45 -23 44 57 -22 57 58 -24 17 59 -22 25 14 - 98 0 0 -24 14 32 9 31 43 61 102 -44 -24 38 1 -23 51 6 -25 11 1 -23 18 24 - 97 0 0 -25 7 9 9 31 52 62 101 -42 -25 30 36 -24 43 45 -26 3 33 -24 11 6 - 96 0 0 -25 59 15 9 32 2 63 99 -41 -26 22 40 -25 35 53 -26 55 33 -25 3 17 - 95 0 0 -26 50 46 9 32 12 64 97 -40 -27 14 8 -26 27 28 -27 46 57 -25 54 56 - 94 0 0 -27 41 42 9 32 22 65 95 -39 -28 5 0 -27 18 27 -28 37 45 -26 45 59 - 93 0 0 -28 31 59 9 32 31 66 92 -38 -28 55 14 -28 8 47 -29 27 53 -27 36 25 - 92 0 0 -29 21 36 9 32 41 67 90 -37 -29 44 47 -28 58 29 -30 17 20 -28 26 12 - 91 0 0 -30 10 31 9 32 51 68 88 -36 -30 33 38 -29 47 28 -31 6 5 -29 15 18 - 90 0 0 -30 58 43 9 33 0 69 85 -35 -31 21 45 -30 35 45 -31 54 5 -30 3 41 - 89 0 0 -31 46 10 9 33 10 70 82 -34 -32 9 6 -31 23 16 -32 41 19 -30 51 19 - 88 0 0 -32 32 50 9 33 19 71 79 -32 -32 55 41 -32 10 2 -33 27 46 -31 38 12 - 87 0 0 -33 18 42 9 33 29 71 75 -31 -33 41 28 -32 56 0 -34 13 24 -32 24 19 - 86 0 0 -34 3 46 9 33 38 72 72 -30 -34 26 26 -33 41 10 -34 58 14 -33 9 37 - 85 0 0 -34 48 1 9 33 47 72 68 -29 -35 10 34 -34 25 31 -35 42 13 -33 54 6 - 84 0 0 -35 31 25 9 33 57 73 65 -28 -35 53 51 -35 9 1 -36 25 21 -34 37 45 - 83 0 0 -36 13 58 9 34 6 73 61 -27 -36 36 18 -35 51 41 -37 7 38 -35 20 34 - 82 0 0 -36 55 39 9 34 15 74 56 -26 -37 17 52 -36 33 29 -37 49 3 -36 2 32 - 81 0 0 -37 36 29 9 34 23 74 52 -25 -37 58 35 -37 14 26 -38 29 36 -36 43 39 - 80 0 0 -38 16 27 9 34 32 74 48 -24 -38 38 25 -37 54 31 -39 9 16 -37 23 53 - 79 0 0 -38 55 32 9 34 41 74 44 -23 -39 17 23 -38 33 44 -39 48 4 -38 3 16 - 78 0 0 -39 33 45 9 34 49 74 39 -23 -39 55 29 -39 12 4 -40 25 59 -38 41 47 - 77 0 0 -40 11 6 9 34 57 74 35 -22 -40 32 42 -39 49 32 -41 3 2 -39 19 25 - 76 0 0 -40 47 34 9 35 6 74 31 -21 -41 9 3 -40 26 8 -41 39 12 -39 56 12 - 75 0 0 -41 23 11 9 35 14 74 27 -20 -41 44 32 -41 1 52 -42 14 30 -40 32 7 - 74 0 0 -41 57 56 9 35 22 74 23 -19 -42 19 9 -41 36 45 -42 48 56 -41 7 10 - 73 0 0 -42 31 49 9 35 30 73 19 -18 -42 52 55 -42 10 46 -43 22 31 -41 41 22 - 72 0 0 -43 4 52 9 35 37 73 15 -17 -43 25 50 -42 43 56 -43 55 15 -42 14 42 - 71 0 0 -43 37 4 9 35 45 73 11 -16 -43 57 54 -43 16 16 -44 27 8 -42 47 13 - 70 0 0 -44 8 26 9 35 52 72 8 -16 -44 29 8 -43 47 46 -44 58 12 -43 18 53 - 69 0 0 -44 38 58 9 36 0 72 5 -15 -44 59 33 -44 18 26 -45 28 26 -43 49 44 - 68 0 0 -45 8 42 9 36 7 72 2 -14 -45 29 10 -44 48 17 -45 57 51 -44 19 46 - 67 0 0 -45 37 38 9 36 14 71 359 -13 -45 57 58 -45 17 21 -46 26 29 -44 49 0 - 66 0 0 -46 5 46 9 36 21 71 356 -13 -46 25 58 -45 45 36 -46 54 19 -45 17 26 - 65 0 0 -46 33 7 9 36 28 70 353 -12 -46 53 12 -46 13 5 -47 21 22 -45 45 5 - 64 0 0 -46 59 42 9 36 34 70 351 -11 -47 19 40 -46 39 47 -47 47 39 -46 11 57 - 63 0 0 -47 25 32 9 36 41 69 348 -10 -47 45 22 -47 5 44 -48 13 12 -46 38 4 - 62 0 0 -47 50 37 9 36 48 68 346 -10 -48 10 19 -47 30 56 -48 37 59 -47 3 26 - 61 0 0 -48 14 57 9 36 54 68 344 -9 -48 34 33 -47 55 23 -49 2 3 -47 28 3 - 60 0 0 -48 38 35 9 37 0 67 342 -8 -48 58 4 -48 19 8 -49 25 23 -47 51 57 - 59 0 0 -49 1 30 9 37 6 67 340 -8 -49 20 52 -48 42 9 -49 48 2 -48 15 9 - 58 0 0 -49 23 43 9 37 12 66 338 -7 -49 42 58 -49 4 29 -50 9 59 -48 37 37 - 57 0 0 -49 45 14 9 37 18 66 336 -6 -50 4 23 -49 26 8 -50 31 15 -48 59 25 - 56 0 0 -50 6 6 9 37 24 65 334 -6 -50 25 8 -49 47 5 -50 51 50 -49 20 32 - 55 0 0 -50 26 18 9 37 30 64 333 -5 -50 45 14 -50 7 23 -51 11 47 -49 40 59 - 54 0 0 -50 45 50 9 37 35 64 331 -4 -51 4 40 -50 27 2 -51 31 5 -50 0 46 - 53 0 0 -51 4 45 9 37 41 63 329 -4 -51 23 29 -50 46 3 -51 49 45 -50 19 55 - 52 0 0 -51 23 2 9 37 46 63 328 -3 -51 41 39 -51 4 26 -52 7 47 -50 38 26 - 51 0 0 -51 40 42 9 37 52 62 326 -2 -51 59 14 -51 22 11 -52 25 14 -50 56 20 - 50 0 0 -51 57 45 9 37 57 61 325 -2 -52 16 12 -51 39 20 -52 42 4 -51 13 37 - 49 0 0 -52 14 13 9 38 2 61 323 -1 -52 32 34 -51 55 54 -52 58 19 -51 30 18 - 48 0 0 -52 30 6 9 38 7 60 322 -1 -52 48 22 -52 11 52 -53 13 59 -51 46 23 - 47 0 0 -52 45 25 9 38 12 60 321 0 -53 3 35 -52 27 16 -53 29 5 -52 1 54 Uncertainty in time = +/- 4 secs [Prediction of 2008 Mar 28.0] Data for the target star ------------------------ * name: TYC 6836-00230-1 * constellation : Sagittarius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 17 50 26.6827 DE: -26 47 32.990 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .031, .027 ) * V mag [mag]: 10.0 * B mag [mag]: 10.6 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1048) Feodosia approx. diameter [km]: 60 approx. diameter ["]: .047 distance from Earth [AU]: 1.76400 * orbital information: orbit source: Preston date of fit: 2008 Mar 27 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 804 number of rejected observations: 53 time covered by the observations: 1924 Nov 29 - 2008 Feb 09 1 sigma uncertainty ellipse (major, minor, PA): 0.034, 0.016, 107° remarks: * orbital elements for (1048) Feodosia : Mean anomaly = 3.74398041 deg Arg. of pericenter = 184.30515521 deg Long. of node = 52.90332588 deg Inclination = 15.80531106 deg Eccentricity = 0.18032809 Semimajor axis = 2.73275184 AU Perihelion dist = 2.23995992 AU Mag: H = 9.63, G = 0.15 Epoch of elements : MJD 54558.39900000 TDT (2008 Apr 02.399) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Apr 2 1048 Feodosia 9h 34.9m UT 10.0 17 50 26.683-26 47 32.99TYC 6836-00230-1 10.6 13.9 60 4.5 1.764 2.394 -20.16 -67.2103 -26.787 37.16 5.14 9.5811 -0.14135 -0.22698 6.43225 -4.04330 -0.00533 0.00017 2000 1.9115332008 325.00000184.305155 52.903326 15.8053110.18032809 2.7327518 2.2399599 9.8 5.00.15 RATE 2.1817440 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.046 0.031 99 1.70 0.033 0 54553.5020080402_0230-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 28, 06:26 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org