IOTA/IOTA-ES occultation update for (1110) Jaroslawa / TYC 6206-01471-1 event on 2007 Sep 01, 21:57 UT Visible from Africa Summary ------- On 2007 Sep 01 UT, the 14 km diameter asteroid (1110) Jaroslawa will occult a 9.8 mag star in the constellation Scorpius for observers along a path across Africa. In the case of an occultation, the combined light of the asteroid and the star will drop by 5.5 mag to 15.3 mag (the magnitude of the asteroid) for at most 0.7 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: 36 * date and approx. time of event: 2007 Sep 01, 21:52 - 2007 Sep 01, 22:02 UT * magnitude of target star: 9.8 * magnitude drop [mag]: 5.5 * estimated maximum duration [s]: 0.7 * Moon: 74 % sunlit, 153° distance * Sun: 87° distance * rough path description: Africa Additional comments ------------------- low altitude The occultation path -------------------- * approximate projected width [km]: 15 * 1 sigma uncertainty interval [path widths]: +/- 1.84 * 1 sigma uncertainty interval [seconds]: +/- 1.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .027 +/- .024) * 1 sigma uncertainty ellipse (major, minor, PA): ( .027", .024", 88° ) * approx speed of asteroid's shadow [km/s]: 20.2056 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6206-01471-1 by 1110 Jaroslawa on 2007 Sep 01 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 -157 0 0 -12 12 56 21 52 24 1 107 68 -12 17 11 -12 8 41 -12 32 52 .. .. .. -156 0 0 -12 31 42 21 52 24 2 107 68 -12 35 58 -12 27 27 -12 51 39 .. .. .. -155 0 0 -12 50 38 21 52 25 3 107 68 -12 54 54 -12 46 23 -13 10 36 -12 30 43 -154 0 0 -13 9 44 21 52 25 4 107 68 -13 14 0 -13 5 28 -13 29 43 -12 49 48 -153 0 0 -13 28 59 21 52 25 5 106 68 -13 33 15 -13 24 43 -13 48 59 -13 9 2 -152 0 0 -13 48 23 21 52 26 6 106 68 -13 52 39 -13 44 7 -14 8 24 -13 28 25 -151 0 0 -14 7 55 21 52 27 7 106 68 -14 12 12 -14 3 39 -14 27 57 -13 47 56 -150 0 0 -14 27 35 21 52 27 8 106 67 -14 31 52 -14 23 18 -14 47 38 -14 7 35 -149 0 0 -14 47 22 21 52 28 9 105 67 -14 51 39 -14 43 5 -15 7 26 -14 27 21 -148 0 0 -15 7 17 21 52 29 10 105 67 -15 11 34 -15 3 0 -15 27 22 -14 47 15 -147 0 0 -15 27 18 21 52 30 11 105 66 -15 31 35 -15 23 0 -15 47 23 -15 7 15 -146 0 0 -15 47 24 21 52 32 12 105 66 -15 51 42 -15 43 7 -16 7 31 -15 27 21 -145 0 0 -16 7 37 21 52 33 13 104 66 -16 11 55 -16 3 19 -16 27 44 -15 47 32 -144 0 0 -16 27 54 21 52 34 14 104 65 -16 32 12 -16 23 37 -16 48 2 -16 7 49 -143 0 0 -16 48 17 21 52 36 15 104 65 -16 52 35 -16 43 59 -17 8 25 -16 28 11 -142 0 0 -17 8 43 21 52 38 16 103 64 -17 13 1 -17 4 25 -17 28 52 -16 48 36 -141 0 0 -17 29 13 21 52 39 17 103 63 -17 33 31 -17 24 54 -17 49 23 -17 9 6 -140 0 0 -17 49 46 21 52 41 18 103 63 -17 54 4 -17 45 27 -18 9 56 -17 29 38 -139 0 0 -18 10 21 21 52 43 19 102 62 -18 14 40 -18 6 3 -18 30 32 -17 50 13 -138 0 0 -18 30 59 21 52 45 20 102 62 -18 35 18 -18 26 41 -18 51 11 -18 10 51 -137 0 0 -18 51 39 21 52 47 21 102 61 -18 55 57 -18 47 20 -19 11 50 -18 31 30 -136 0 0 -19 12 19 21 52 49 22 101 60 -19 16 38 -19 8 1 -19 32 31 -18 52 10 -135 0 0 -19 33 1 21 52 52 23 101 59 -19 37 19 -19 28 42 -19 53 13 -19 12 51 -134 0 0 -19 53 42 21 52 54 24 100 59 -19 58 1 -19 49 23 -20 13 55 -19 33 32 -133 0 0 -20 14 23 21 52 57 25 100 58 -20 18 42 -20 10 4 -20 34 36 -19 54 13 -132 0 0 -20 35 4 21 52 59 26 99 57 -20 39 22 -20 30 45 -20 55 17 -20 14 53 -131 0 0 -20 55 43 21 53 2 27 99 56 -21 0 1 -20 51 24 -21 15 56 -20 35 32 -130 0 0 -21 16 20 21 53 4 28 99 56 -21 20 39 -21 12 1 -21 36 33 -20 56 9 -129 0 0 -21 36 55 21 53 7 29 98 55 -21 41 14 -21 32 36 -21 57 8 -21 16 44 -128 0 0 -21 57 27 21 53 10 30 98 54 -22 1 46 -21 53 8 -22 17 40 -21 37 16 -127 0 0 -22 17 55 21 53 13 31 97 53 -22 22 14 -22 13 37 -22 38 8 -21 57 45 -126 0 0 -22 38 21 21 53 16 32 97 52 -22 42 39 -22 34 2 -22 58 33 -22 18 11 -125 0 0 -22 58 41 21 53 19 33 96 51 -23 3 0 -22 54 23 -23 18 54 -22 38 32 -124 0 0 -23 18 58 21 53 23 34 95 51 -23 23 16 -23 14 39 -23 39 10 -22 58 48 -123 0 0 -23 39 9 21 53 26 35 95 50 -23 43 27 -23 34 50 -23 59 21 -23 19 0 -122 0 0 -23 59 14 21 53 29 36 94 49 -24 3 33 -23 54 56 -24 19 26 -23 39 5 -121 0 0 -24 19 14 21 53 33 37 94 48 -24 23 32 -24 14 55 -24 39 25 -23 59 5 -120 0 0 -24 39 6 21 53 36 38 93 47 -24 43 25 -24 34 48 -24 59 17 -24 18 59 -119 0 0 -24 58 52 21 53 40 39 92 46 -25 3 11 -24 54 34 -25 19 2 -24 38 45 -118 0 0 -25 18 31 21 53 43 40 92 45 -25 22 49 -25 14 13 -25 38 40 -24 58 25 -117 0 0 -25 38 2 21 53 47 41 91 44 -25 42 20 -25 33 44 -25 58 11 -25 17 56 -116 0 0 -25 57 25 21 53 51 41 90 44 -26 1 43 -25 53 7 -26 17 33 -25 37 20 -115 0 0 -26 16 39 21 53 55 42 90 43 -26 20 57 -26 12 21 -26 36 46 -25 56 34 -114 0 0 -26 35 44 21 53 58 43 89 42 -26 40 2 -26 31 27 -26 55 50 -26 15 40 -113 0 0 -26 54 40 21 54 2 44 88 41 -26 58 57 -26 50 23 -27 14 45 -26 34 37 -112 0 0 -27 13 26 21 54 6 45 87 40 -27 17 43 -27 9 9 -27 33 31 -26 53 24 -111 0 0 -27 32 2 21 54 10 46 86 39 -27 36 19 -27 27 45 -27 52 6 -27 12 1 -110 0 0 -27 50 28 21 54 14 47 86 38 -27 54 44 -27 46 11 -28 10 30 -27 30 27 -109 0 0 -28 8 42 21 54 18 48 85 37 -28 12 59 -28 4 26 -28 28 44 -27 48 43 -108 0 0 -28 26 46 21 54 23 49 84 36 -28 31 2 -28 22 30 -28 46 47 -28 6 48 -107 0 0 -28 44 38 21 54 27 49 83 36 -28 48 54 -28 40 22 -29 4 38 -28 24 41 -106 0 0 -29 2 19 21 54 31 50 82 35 -29 6 34 -28 58 3 -29 22 17 -28 42 23 -105 0 0 -29 19 47 21 54 35 51 81 34 -29 24 3 -29 15 31 -29 39 44 -28 59 52 -104 0 0 -29 37 3 21 54 40 52 80 33 -29 41 18 -29 32 48 -29 56 59 -29 17 9 -103 0 0 -29 54 6 21 54 44 53 79 32 -29 58 21 -29 49 51 -30 14 1 -29 34 14 -102 0 0 -30 10 57 21 54 48 54 78 31 -30 15 12 -30 6 42 -30 30 51 -29 51 5 -101 0 0 -30 27 34 21 54 53 54 77 30 -30 31 49 -30 23 19 -30 47 26 -30 7 44 -100 0 0 -30 43 58 21 54 57 55 75 29 -30 48 12 -30 39 44 -31 3 49 -30 24 9 - 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Data for the target star ------------------------ * name: TYC 6206-01471-1 * constellation : Scorpius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 16 18 14.9789 DE: -17 00 42.768 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .021, .019 ) * V mag [mag]: 9.8 * B mag [mag]: 10.4 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1110) Jaroslawa approx. diameter [km]: 14 approx. diameter ["]: .013 distance from Earth [AU]: 1.50100 * orbital information: orbit source: Preston date of fit: 2007 Aug 28 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 895 number of rejected observations: 51 time covered by the observations: 1928 Aug 10 - 2007 Jul 01 1 sigma uncertainty ellipse (major, minor, PA): 0.017, 0.014, 85° remarks: * orbital elements for (1110) Jaroslawa : Mean anomaly = 335.92284733 deg Arg. of pericenter = 78.31272775 deg Long. of node = 241.91590170 deg Inclination = 5.85080952 deg Eccentricity = 0.24174144 Semimajor axis = 2.21856276 AU Perihelion dist = 1.68224420 AU Mag: H = 11.36, G = 0.15 Epoch of elements : MJD 54344.91500000 TDT (2007 Sep 01.915) ------ occelmnt file for Occult BEGIN ----------------------------------- 2007 Sep 01 1110 Jaroslawa 21h 57.3m UT 9.8 16 18 14.979-17 0 42.77TYC 6206-01471-1 10.4 15.3 14 0.7 1.501 4.617 -8.91 -65.455 -17.010 -149.34 8.16 21.9557 -.04597 -.34065 11.30271 -1.52123 0.00471 -0.00080 2000 334.4568942007 828.00000 78.312728241.915902 5.8508100.241741442.218562761.6822442011.85 0.15 RATE 2.9826100 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.027 0.024 88.0 2.840 0.024 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2007 Aug 28, 23:09 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org