IOTA/IOTA-ES occultation update for (763) Cupido / TYC 1197-01083-1 event on 2007 Nov 03, 09:07 UT Visible from S USA< Mexico, E Australia Summary ------- On 2007 Nov 03 UT, the 17 km diameter asteroid (763) Cupido will occult a 9.7 mag star in the constellation Pisces for observers along a path across S USA< Mexico, E Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.6 mag to 14.3 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: 35 * date and approx. time of event: 2007 Nov 03, 08:48 - 2007 Nov 03, 09:26 UT * magnitude of target star: 9.7 * magnitude drop [mag]: 4.6 * estimated maximum duration [s]: 3.0 * Moon: 35 % sunlit, 123° distance * Sun: 162° distance * rough path description: S USA< Mexico, E Australia The occultation path -------------------- * approximate projected width [km]: 17 * 1 sigma uncertainty interval [path widths]: +/- 1.88 * 1 sigma uncertainty interval [seconds]: +/- 7.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .064 +/- .051) * 1 sigma uncertainty ellipse (major, minor, PA): ( .066", .048", 68° ) * approx speed of asteroid's shadow [km/s]: 5.5894 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1197-01083-1 by 763 Cupido on 2007 Nov 03 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 ... .. .. -42 0 0 .. .. .. .. .. .. ... .. .. ... .. .. ... .. .. 122 44 33 124 29 23 -41 0 0 9 26 21 2 65 10 124 14 33 124 44 9 123 18 9 125 39 6 127 15 17 -40 0 0 9 26 18 5 63 7 127 1 22 127 29 9 126 8 32 128 20 50 Latitude Latitude Latitude Latitude 128 0 0 -39 43 4 9 26 17 5 63 7 -39 37 50 -39 48 17 -39 18 11 -40 7 58 129 0 0 -39 19 49 9 26 15 6 62 6 -39 14 34 -39 25 4 -38 54 50 -39 44 50 130 0 0 -38 55 59 9 26 13 7 61 5 -38 50 42 -39 1 15 -38 30 54 -39 21 6 131 0 0 -38 31 32 9 26 11 8 61 4 -38 26 15 -38 36 50 -38 6 21 -38 56 46 132 0 0 -38 6 30 9 26 9 9 60 3 -38 1 11 -38 11 49 -37 41 13 -38 31 50 133 0 0 -37 40 52 9 26 6 10 60 2 -37 35 32 -37 46 13 -37 15 29 -38 6 18 134 0 0 -37 14 38 9 26 3 10 59 2 -37 9 17 -37 20 0 -36 49 9 -37 40 11 135 0 0 -36 47 48 9 25 59 11 58 1 -36 42 25 -36 53 11 -36 22 12 -37 13 27 136 0 0 -36 20 22 9 25 56 12 58 0 -36 14 58 -36 25 46 -35 54 40 -36 46 7 137 0 0 -35 52 20 9 25 52 13 57 -1 -35 46 54 -35 57 45 -35 26 31 -36 18 11 138 0 0 -35 23 42 9 25 47 14 57 -2 -35 18 15 -35 29 8 -34 57 47 -35 49 39 139 0 0 -34 54 27 9 25 42 15 56 -3 -34 48 59 -34 59 56 -34 28 27 -35 20 31 140 0 0 -34 24 37 9 25 37 16 55 -4 -34 19 8 -34 30 7 -33 58 31 -34 50 47 141 0 0 -33 54 12 9 25 32 17 55 -5 -33 48 41 -33 59 42 -33 27 59 -34 20 27 142 0 0 -33 23 11 9 25 26 18 54 -6 -33 17 39 -33 28 43 -32 56 52 -33 49 32 143 0 0 -32 51 34 9 25 20 19 54 -7 -32 46 1 -32 57 8 -32 25 10 -33 18 1 144 0 0 -32 19 23 9 25 13 20 53 -8 -32 13 49 -32 24 58 -31 52 54 -32 45 56 145 0 0 -31 46 37 9 25 7 21 53 -9 -31 41 2 -31 52 13 -31 20 2 -32 13 16 146 0 0 -31 13 17 9 24 59 22 52 -10 -31 7 41 -31 18 54 -30 46 37 -31 40 1 147 0 0 -30 39 24 9 24 52 23 52 -11 -30 33 46 -30 45 1 -30 12 38 -31 6 13 148 0 0 -30 4 57 9 24 43 24 51 -12 -29 59 18 -30 10 36 -29 38 6 -30 31 51 149 0 0 -29 29 57 9 24 35 25 51 -13 -29 24 17 -29 35 37 -29 3 1 -29 56 56 150 0 0 -28 54 25 9 24 26 26 50 -14 -28 48 44 -29 0 6 -28 27 24 -29 21 29 151 0 0 -28 18 21 9 24 17 27 50 -15 -28 12 40 -28 24 3 -27 51 16 -28 45 30 152 0 0 -27 41 47 9 24 7 28 49 -16 -27 36 4 -27 47 30 -27 14 37 -28 9 0 153 0 0 -27 4 42 9 23 57 29 49 -17 -26 58 59 -27 10 26 -26 37 28 -27 31 59 154 0 0 -26 27 8 9 23 47 30 48 -18 -26 21 24 -26 32 52 -25 59 50 -26 54 29 155 0 0 -25 49 5 9 23 36 31 48 -19 -25 43 20 -25 54 50 -25 21 43 -26 16 30 156 0 0 -25 10 35 9 23 24 32 47 -20 -25 4 49 -25 16 21 -24 43 9 -25 38 3 157 0 0 -24 31 37 9 23 13 33 47 -21 -24 25 51 -24 37 24 -24 4 9 -24 59 9 158 0 0 -23 52 14 9 23 0 34 46 -22 -23 46 27 -23 58 2 -23 24 42 -24 19 49 159 0 0 -23 12 26 9 22 48 35 46 -23 -23 6 38 -23 18 14 -22 44 51 -23 40 4 160 0 0 -22 32 14 9 22 35 36 45 -24 -22 26 26 -22 38 3 -22 4 37 -22 59 55 161 0 0 -21 51 40 9 22 21 38 45 -25 -21 45 51 -21 57 29 -21 24 0 -22 19 23 162 0 0 -21 10 44 9 22 8 39 44 -26 -21 4 55 -21 16 34 -20 43 2 -21 38 30 163 0 0 -20 29 28 9 21 53 40 44 -28 -20 23 38 -20 35 18 -20 1 44 -20 57 15 164 0 0 -19 47 52 9 21 39 41 43 -29 -19 42 2 -19 53 42 -19 20 6 -20 15 41 165 0 0 -19 5 59 9 21 24 42 43 -30 -19 0 8 -19 11 49 -18 38 11 -19 33 49 166 0 0 -18 23 48 9 21 8 43 43 -31 -18 17 58 -18 29 39 -17 56 0 -18 51 40 167 0 0 -17 41 23 9 20 53 44 42 -32 -17 35 32 -17 47 14 -17 13 34 -18 9 16 168 0 0 -16 58 43 9 20 36 45 42 -33 -16 52 52 -17 4 35 -16 30 53 -17 26 37 169 0 0 -16 15 51 9 20 20 46 41 -34 -16 10 0 -16 21 43 -15 48 1 -16 43 45 170 0 0 -15 32 48 9 20 3 48 41 -35 -15 26 57 -15 38 39 -15 4 57 -16 0 42 171 0 0 -14 49 34 9 19 46 49 40 -37 -14 43 43 -14 55 26 -14 21 44 -15 17 28 172 0 0 -14 6 12 9 19 28 50 40 -38 -14 0 21 -14 12 4 -13 38 22 -14 34 6 173 0 0 -13 22 43 9 19 10 51 39 -39 -13 16 52 -13 28 35 -12 54 54 -13 50 37 174 0 0 -12 39 9 9 18 52 52 39 -40 -12 33 18 -12 45 0 -12 11 20 -13 7 1 175 0 0 -11 55 30 9 18 33 53 38 -41 -11 49 39 -12 1 20 -11 27 42 -12 23 21 176 0 0 -11 11 48 9 18 15 54 38 -42 -11 5 57 -11 17 38 -10 44 1 -11 39 38 177 0 0 -10 28 4 9 17 55 56 37 -43 -10 22 14 -10 33 54 -10 0 19 -10 55 53 178 0 0 - 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Data for the target star ------------------------ * name: TYC 1197-01083-1 * constellation : Pisces * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 01 18 09.8752 DE: +17 09 35.230 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .019, .018 ) * V mag [mag]: 9.7 * B mag [mag]: 10.1 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (763) Cupido approx. diameter [km]: 17 approx. diameter ["]: .026 distance from Earth [AU]: 0.90800 * orbital information: orbit source: Preston date of fit: 2007 Oct 23 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 593 number of rejected observations: 40 time covered by the observations: 1913 Sep 26 - 2007 Oct 19 1 sigma uncertainty ellipse (major, minor, PA): 0.064, 0.045, 66° remarks: * orbital elements for (763) Cupido : Mean anomaly = 9.88536278 deg Arg. of pericenter = 88.90508306 deg Long. of node = 289.97901366 deg Inclination = 4.08593185 deg Eccentricity = 0.16559661 Semimajor axis = 2.24074108 AU Perihelion dist = 1.86968195 AU Mag: H = 12.38, G = 0.15 Epoch of elements : MJD 54407.38000000 TDT (2007 Nov 03.380) ------ occelmnt file for Occult BEGIN ----------------------------------- 2007 Nov 03 763 Cupido 9h 7.6m UT 9.7 1 18 9.875 17 9 35.23TYC 1197-01083-1 10.1 14.3 17 3.0 0.908 -1.754 -17.29 -159.620 17.164 38.99 -14.99 9.1273 .09458 -.13781 -2.59989 -1.78701 0.00158 -0.00014 2000 7.7167955820071027.00000 88.905083289.979014 4.0859320.165596612.240741081.8696819512.55 0.15 RATE 2.9384381 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.066 0.048 67.8 2.880 0.049 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2007 Oct 23, 22:19 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org