IOTA/IOTA-ES occultation update for (442) Eichsfeldia / TYC 1318-00742-1 event on 2009 Sep 08, 21:19 UT Visible from Summary ------- On 2009 Sep 08 UT, the 67 km diameter asteroid (442) Eichsfeldia will occult a 10.2 mag star in the constellation Orion for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.0 mag to 15.2 mag (the magnitude of the asteroid) for at most 2.6 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: 80 * date and approx. time of event: 2009 Sep 08, 21:16 - 2009 Sep 08, 21:18 UT * magnitude of target star: 10.2 * magnitude drop [mag]: 5.0 * estimated maximum duration [s]: 2.6 * Moon: 82 % sunlit, 58° distance * Sun: 73° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 99 * 1 sigma uncertainty interval [path widths]: +/- 0.68 * 1 sigma uncertainty interval [seconds]: +/- 1.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .026 +/- .024) * 1 sigma uncertainty ellipse (major, minor, PA): ( .026", .024", 89° ) * approx speed of asteroid's shadow [km/s]: 25.6324 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1318-00742-1 by 442 Eichsfeldia on 2009 Sep 8 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 36 0 0 48 17 39 21 16 21 0 63 -36 47 47 22 48 48 16 .. .. .. 49 30 28 37 0 0 48 38 47 21 16 21 1 63 -36 48 8 29 49 9 26 .. .. .. 49 51 39 38 0 0 48 59 51 21 16 21 2 64 -36 48 29 31 49 30 30 .. .. .. 50 12 45 39 0 0 49 20 48 21 16 21 3 65 -35 48 50 28 49 51 28 .. .. .. 50 33 45 40 0 0 49 41 40 21 16 21 3 66 -35 49 11 19 50 12 21 .. .. .. 50 54 38 41 0 0 50 2 25 21 16 22 4 66 -35 49 32 4 50 33 7 .. .. .. 51 15 25 42 0 0 50 23 4 21 16 22 5 67 -34 49 52 42 50 53 45 49 11 55 51 36 4 43 0 0 50 43 34 21 16 23 5 68 -34 50 13 12 51 14 16 49 32 25 51 56 35 44 0 0 51 3 57 21 16 23 6 69 -34 50 33 35 51 34 39 49 52 47 52 16 58 45 0 0 51 24 11 21 16 24 7 69 -33 50 53 49 51 54 53 50 13 2 52 37 12 46 0 0 51 44 16 21 16 24 8 70 -33 51 13 54 52 14 58 50 33 7 52 57 17 47 0 0 52 4 12 21 16 25 8 71 -32 51 33 51 52 34 53 50 53 4 53 17 12 48 0 0 52 23 58 21 16 25 9 72 -32 51 53 37 52 54 39 51 12 51 53 36 56 49 0 0 52 43 33 21 16 26 10 73 -32 52 13 13 53 14 14 51 32 29 53 56 30 50 0 0 53 2 58 21 16 27 10 74 -31 52 32 39 53 33 38 51 51 56 54 15 52 51 0 0 53 22 12 21 16 28 11 74 -31 52 51 54 53 52 50 52 11 12 54 35 4 52 0 0 53 41 15 21 16 29 12 75 -30 53 10 58 54 11 51 52 30 17 54 54 3 53 0 0 54 0 5 21 16 29 12 76 -30 53 29 50 54 30 41 52 49 11 55 12 50 54 0 0 54 18 44 21 16 30 13 77 -29 53 48 30 54 49 18 53 7 53 55 31 25 55 0 0 54 37 10 21 16 31 14 78 -29 54 6 57 55 7 42 53 26 23 55 49 47 56 0 0 54 55 23 21 16 32 14 79 -28 54 25 12 55 25 53 53 44 40 56 7 55 57 0 0 55 13 23 21 16 33 15 79 -28 54 43 15 55 43 51 54 2 45 56 25 51 58 0 0 55 31 10 21 16 35 15 80 -27 55 1 4 56 1 36 54 20 37 56 43 32 59 0 0 55 48 43 21 16 36 16 81 -27 55 18 39 56 19 7 54 38 15 57 1 0 60 0 0 56 6 3 21 16 37 17 82 -27 55 36 1 56 36 24 54 55 40 57 18 14 61 0 0 56 23 9 21 16 38 17 83 -26 55 53 9 56 53 27 55 12 52 57 35 13 62 0 0 56 40 0 21 16 39 18 84 -26 56 10 3 57 10 16 55 29 49 57 51 58 63 0 0 56 56 37 21 16 40 18 85 -25 56 26 43 57 26 50 55 46 32 58 8 28 64 0 0 57 12 59 21 16 42 19 86 -25 56 43 8 57 43 9 56 3 1 58 24 43 65 0 0 57 29 7 21 16 43 20 87 -24 56 59 19 57 59 14 56 19 16 58 40 43 66 0 0 57 44 59 21 16 44 20 88 -24 57 15 14 58 15 3 56 35 16 58 56 28 67 0 0 58 0 37 21 16 46 21 89 -23 57 30 55 58 30 38 56 51 1 59 11 58 68 0 0 58 16 0 21 16 47 21 89 -23 57 46 21 58 45 57 57 6 31 59 27 13 69 0 0 58 31 7 21 16 48 22 90 -22 58 1 32 59 1 1 57 21 46 59 42 12 70 0 0 58 45 59 21 16 50 22 91 -22 58 16 27 59 15 50 57 36 46 59 56 55 71 0 0 59 0 36 21 16 51 23 92 -21 58 31 8 59 30 23 57 51 31 60 11 23 72 0 0 59 14 57 21 16 53 23 93 -21 58 45 33 59 44 40 58 6 0 60 25 36 73 0 0 59 29 3 21 16 54 24 94 -20 58 59 42 59 58 43 58 20 15 60 39 33 74 0 0 59 42 54 21 16 56 24 95 -20 59 13 36 60 12 29 58 34 13 60 53 14 75 0 0 59 56 28 21 16 57 25 96 -19 59 27 15 60 26 0 58 47 57 61 6 39 76 0 0 60 9 48 21 16 59 25 97 -19 59 40 38 60 39 15 59 1 25 61 19 49 77 0 0 60 22 51 21 17 0 26 98 -18 59 53 45 60 52 15 59 14 38 61 32 44 78 0 0 60 35 40 21 17 2 26 99 -18 60 6 37 61 4 59 59 27 35 61 45 22 79 0 0 60 48 12 21 17 3 27 100 -17 60 19 14 61 17 28 59 40 16 61 57 45 80 0 0 61 0 29 21 17 5 27 101 -17 60 31 35 61 29 41 59 52 42 62 9 53 81 0 0 61 12 31 21 17 6 27 102 -16 60 43 40 61 41 39 60 4 53 62 21 44 82 0 0 61 24 17 21 17 8 28 103 -16 60 55 31 61 53 21 60 16 49 62 33 21 83 0 0 61 35 48 21 17 9 28 104 -15 61 7 5 62 4 48 60 28 28 62 44 42 84 0 0 61 47 3 21 17 11 29 105 -15 61 18 25 62 15 59 60 39 53 62 55 47 85 0 0 61 58 4 21 17 13 29 107 -14 61 29 29 62 26 55 60 51 2 63 6 38 86 0 0 62 8 48 21 17 14 29 108 -14 61 40 18 62 37 36 61 1 56 63 17 13 87 0 0 62 19 18 21 17 16 30 109 -14 61 50 51 62 48 1 61 12 35 63 27 33 88 0 0 62 29 33 21 17 17 30 110 -13 62 1 10 62 58 12 61 22 59 63 37 38 89 0 0 62 39 32 21 17 19 31 111 -13 62 11 13 63 8 8 61 33 7 63 47 28 90 0 0 62 49 17 21 17 21 31 112 -12 62 21 1 63 17 48 61 43 1 63 57 3 91 0 0 62 58 46 21 17 22 31 113 -12 62 30 35 63 27 14 61 52 39 64 6 23 92 0 0 63 8 1 21 17 24 32 114 -11 62 39 54 63 36 25 62 2 3 64 15 28 93 0 0 63 17 2 21 17 25 32 115 -11 62 48 58 63 45 21 62 11 12 64 24 19 94 0 0 63 25 47 21 17 27 32 116 -10 62 57 47 63 54 3 62 20 6 64 32 56 95 0 0 63 34 18 21 17 29 33 117 -10 63 6 22 64 2 30 62 28 46 64 41 18 96 0 0 63 42 35 21 17 30 33 119 -9 63 14 42 64 10 43 62 37 11 64 49 25 97 0 0 63 50 37 21 17 32 33 120 -9 63 22 48 64 18 42 62 45 21 64 57 18 98 0 0 63 58 25 21 17 34 34 121 -9 63 30 39 64 26 26 62 53 17 65 4 58 99 0 0 64 5 58 21 17 35 34 122 -8 63 38 16 64 33 56 63 0 59 65 12 23 100 0 0 64 13 18 21 17 37 34 123 -8 63 45 39 64 41 12 63 8 26 65 19 34 101 0 0 64 20 24 21 17 39 35 124 -7 63 52 48 64 48 14 63 15 40 65 26 32 102 0 0 64 27 16 21 17 40 35 125 -7 63 59 43 64 55 3 63 22 39 65 33 16 103 0 0 64 33 54 21 17 42 35 126 -6 64 6 24 65 1 38 63 29 24 65 39 46 104 0 0 64 40 18 21 17 44 35 128 -6 64 12 52 65 7 59 63 35 56 65 46 2 105 0 0 64 46 28 21 17 45 36 129 -5 64 19 5 65 14 6 63 42 13 65 52 5 106 0 0 64 52 25 21 17 47 36 130 -5 64 25 5 65 20 0 63 48 17 65 57 55 107 0 0 64 58 9 21 17 49 36 131 -5 64 30 52 65 25 41 63 54 7 66 3 32 108 0 0 65 3 39 21 17 50 37 132 -4 64 36 25 65 31 8 63 59 44 66 8 55 109 0 0 65 8 56 21 17 52 37 133 -4 64 41 44 65 36 22 64 5 7 66 14 5 110 0 0 65 14 0 21 17 54 37 135 -3 64 46 50 65 41 23 64 10 17 66 19 3 111 0 0 65 18 50 21 17 55 37 136 -3 64 51 43 65 46 11 64 15 13 66 23 47 112 0 0 65 23 28 21 17 57 38 137 -2 64 56 23 65 50 46 64 19 56 66 28 19 113 0 0 65 27 52 21 17 59 38 138 -2 65 0 50 65 55 8 64 24 26 66 32 37 114 0 0 65 32 4 21 18 0 38 139 -2 65 5 4 65 59 18 64 28 43 66 36 44 115 0 0 65 36 2 21 18 2 38 141 -1 65 9 5 66 3 14 64 32 46 66 40 37 116 0 0 65 39 48 21 18 4 38 142 -1 65 12 53 66 6 58 64 36 37 66 44 18 117 0 0 65 43 22 21 18 5 39 143 0 65 16 28 66 10 29 64 40 14 66 47 47 Uncertainty in time = +/- 2 secs [Prediction of 2008 Apr 25.0] Data for the target star ------------------------ * name: TYC 1318-00742-1 * constellation : Orion * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 06 15 52.1018 DE: +18 09 34.270 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .022, .023 ) * V mag [mag]: 10.2 * B mag [mag]: 10.3 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (442) Eichsfeldia approx. diameter [km]: 67 approx. diameter ["]: .036 distance from Earth [AU]: 2.59600 * orbital information: orbit source: Preston date of fit: 2008 Apr 25 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 845 number of rejected observations: 117 time covered by the observations: 1900 Jul 27 - 2007 Jul 25 1 sigma uncertainty ellipse (major, minor, PA): 0.014, 0.009, 86° remarks: * orbital elements for (442) Eichsfeldia : Mean anomaly = 215.82577194 deg Arg. of pericenter = 84.48983416 deg Long. of node = 135.00976687 deg Inclination = 6.06538582 deg Eccentricity = 0.07206197 Semimajor axis = 2.34480160 AU Perihelion dist = 2.17583057 AU Mag: H = 9.90, G = 0.15 Epoch of elements : MJD 55082.88800000 TDT (2009 Sep 08.888) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Sep 8 442 Eichsfeldia 21h 19.2m UT 10.2 6 15 52.102 18 9 34.27TYC 1318-00742-1 10.3 15.2 67 2.6 2.596 3.431 -3.42 146.1109 18.161 -140.41 5.38 21.3192 0.05240 0.73312 14.43249 -1.00823 -0.00526 -0.00001 2000 215.0330112009 9 6.00000 84.489834135.009767 6.0653860.07206197 2.3448016 2.175830610.0 5.00.15 RATE 2.7450170 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.026 0.024 89 1.68 0.024 0 54581.5020090908_0742-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Apr 25, 08:25 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org