IOTA/IOTA-ES occultation update for (751) Faina / TYC 7505-00877-1 event on 2012 Oct 21, 09:21 UT Visible from Japan, E Australia Summary ------- On 2012 Oct 21 UT, the 130 km diameter asteroid (751) Faina will occult a 9.6 mag star in the constellation Piscis Austrinus for observers along a path across Japan, E Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.9 mag to 12.4 mag (the magnitude of the asteroid) for at most 17.2 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: 99 * date and approx. time of event: 2012 Oct 21, 09:15 - 2012 Oct 21, 09:34 UT * geocentric midpoint of event [JD]: 2456221.88992917 * magnitude of target star: 9.6 * magnitude drop [mag]: 2.9 * estimated maximum duration [s]: 17.2 * Moon: 41 % sunlit, 51° distance * Sun: 121° distance * rough path description: Japan, E Australia The occultation path -------------------- * approximate projected width [km]: 136 * 1 sigma uncertainty interval [path widths]: +/- 0.32 * 1 sigma uncertainty interval [seconds]: +/- 4.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .037 +/- .033) * 1 sigma uncertainty ellipse (major, minor, PA): ( .038", .033", 85° ) * approx speed of asteroid's shadow [km/s]: 7.5634 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 7505-00877-1 by 751 Faina on 2012 Oct 21 Centre Star Star Sun Path Limit1 Path Limit2 Error Limit1 Error Limit2 E. Longitude Latitude U.T. Alt Az Alt o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " o ' " o ' " o ' " o ' " Longitude Latitude Longitude Latitude Longitude Latitude Longitude Latitude 145 26 23 -56 2 17 9 15 24 58 53 -1 144 22 11 -55 52 59 146 30 44 -56 11 12 143 41 11 -55 46 48 147 11 59 -56 16 41 146 22 52 -54 36 31 9 15 44 59 54 -2 145 20 49 -54 27 42 147 25 2 -54 44 58 144 41 10 -54 21 50 148 4 52 -54 50 10 147 13 14 -53 11 8 9 16 4 61 54 -3 146 13 10 -53 2 44 148 13 23 -53 19 10 145 34 46 -52 57 10 148 51 55 -53 24 6 147 58 18 -51 46 8 9 16 25 62 55 -4 147 0 4 -51 38 7 148 56 36 -51 53 47 146 22 49 -51 32 48 149 33 56 -51 58 30 148 38 43 -50 21 30 9 16 45 63 56 -5 147 42 10 -50 13 50 149 35 19 -50 28 50 147 6 0 -50 8 45 150 11 33 -50 33 20 149 15 3 -48 57 14 9 17 5 64 58 -6 148 20 4 -48 49 53 150 10 4 -49 4 16 147 44 52 -48 44 59 150 45 17 -49 8 35 149 47 47 -47 33 19 9 17 26 65 59 -7 148 54 14 -47 26 14 150 41 20 -47 40 4 148 19 57 -47 21 31 151 15 37 -47 44 14 150 17 17 -46 9 42 9 17 46 66 61 -8 149 25 4 -46 2 52 151 9 30 -46 16 13 148 51 39 -45 58 20 151 42 54 -46 20 14 150 43 56 -44 46 22 9 18 6 67 63 -9 149 52 57 -44 39 46 151 34 53 -44 52 40 149 20 19 -44 35 22 152 7 29 -44 56 33 151 7 59 -43 23 17 9 18 27 68 66 -10 150 18 10 -43 16 53 151 57 47 -43 29 24 149 46 16 -43 12 38 152 29 38 -43 33 9 151 29 43 -42 0 26 9 18 47 69 68 -11 150 40 59 -41 54 13 152 18 26 -42 6 22 150 9 46 -41 50 5 152 49 36 -42 10 0 151 49 21 -40 37 46 9 19 7 70 71 -11 151 1 36 -40 31 43 152 37 4 -40 43 32 150 31 1 -40 27 41 153 7 35 -40 47 5 152 7 4 -39 15 14 9 19 28 70 74 -12 151 20 15 -39 9 20 152 53 50 -39 20 52 150 50 15 -39 5 25 153 23 45 -39 24 19 152 23 1 -37 52 50 9 19 48 71 78 -13 151 37 4 -37 47 4 153 8 55 -37 58 19 151 7 38 -37 43 14 153 38 16 -38 1 42 152 37 22 -36 30 30 9 20 8 72 82 -14 151 52 14 -36 24 52 153 22 27 -36 35 52 151 23 19 -36 21 7 153 51 17 -36 39 11 152 50 14 -35 8 12 9 20 29 72 85 -15 152 5 51 -35 2 41 153 34 33 -35 13 28 151 37 25 -34 59 0 154 2 53 -35 16 42 153 1 43 -33 45 54 9 20 49 72 90 -16 152 18 3 -33 40 29 153 45 20 -33 51 5 151 50 4 -33 36 52 154 13 13 -33 54 15 153 11 56 -32 23 34 9 21 10 72 94 -16 152 28 55 -32 18 14 153 54 53 -32 28 39 152 1 21 -32 14 41 154 22 21 -32 31 47 153 20 58 -31 1 9 9 21 30 72 98 -17 152 38 34 -30 55 53 154 3 18 -31 6 9 152 11 24 -30 52 23 154 30 21 -31 9 14 153 28 53 -29 38 36 9 21 50 72 102 -18 152 47 3 -29 33 25 154 10 38 -29 43 33 152 20 15 -29 29 58 154 37 19 -29 46 35 153 35 45 -28 15 53 9 22 11 72 107 -18 152 54 27 -28 10 46 154 16 58 -28 20 46 152 28 0 -28 7 21 154 43 18 -28 23 47 153 41 37 -26 52 58 9 22 31 72 111 -19 153 0 50 -26 47 53 154 22 20 -26 57 48 152 34 41 -26 44 31 154 48 22 -27 0 46 153 46 34 -25 29 47 9 22 51 72 115 -20 153 6 14 -25 24 45 154 26 49 -25 34 35 152 40 23 -25 21 24 154 52 32 -25 37 31 153 50 37 -24 6 18 9 23 12 71 119 -21 153 10 43 -24 1 18 154 30 26 -24 11 4 152 45 9 -23 57 59 154 55 53 -24 13 59 153 53 48 -22 42 28 9 23 32 71 122 -21 153 14 19 -22 37 30 154 33 13 -22 47 12 152 48 59 -22 34 11 154 58 25 -22 50 6 153 56 11 -21 18 13 9 23 52 70 126 -22 153 17 3 -21 13 16 154 35 14 -21 22 56 152 51 58 -21 9 59 155 0 11 -21 25 50 153 57 45 -19 53 31 9 24 13 69 129 -22 153 18 58 -19 48 35 154 36 28 -19 58 13 152 54 5 -19 45 18 155 1 12 -20 1 7 153 58 34 -18 28 18 9 24 33 68 132 -23 153 20 4 -18 23 22 154 36 57 -18 33 0 152 55 24 -18 20 6 155 1 29 -18 35 53 153 58 37 -17 2 31 9 24 53 67 134 -24 153 20 24 -16 57 35 154 36 44 -17 7 13 152 55 54 -16 54 18 155 1 5 -17 10 6 153 57 55 -15 36 5 9 25 14 66 137 -24 153 19 58 -15 31 9 154 35 47 -15 40 48 152 55 38 -15 27 51 154 59 58 -15 43 42 153 56 30 -14 8 58 9 25 34 65 139 -25 153 18 46 -14 4 0 154 34 8 -14 13 41 152 54 34 -14 0 42 154 58 11 -14 16 36 153 54 21 -12 41 3 9 25 54 64 141 -25 153 16 49 -12 36 3 154 31 48 -12 45 48 152 52 45 -12 32 44 154 55 42 -12 48 44 153 51 29 -11 12 17 9 26 15 63 143 -26 153 14 7 -11 7 15 154 28 45 -11 17 4 152 50 9 -11 3 55 154 52 33 -11 20 1 153 47 53 - 9 42 35 9 26 35 62 145 -26 153 10 40 - 9 37 30 154 25 0 - 9 47 25 152 46 47 - 9 34 8 154 48 42 - 9 50 23 153 43 32 - 8 11 50 9 26 55 61 146 -27 153 6 26 - 8 6 43 154 20 32 - 8 16 44 152 42 37 - 8 3 18 154 44 10 - 8 19 44 153 38 26 - 6 39 58 9 27 16 60 148 -27 153 1 25 - 6 34 46 154 15 21 - 6 44 55 152 37 39 - 6 31 19 154 38 55 - 6 47 58 153 32 33 - 5 6 51 9 27 36 58 149 -28 152 55 35 - 5 1 35 154 9 25 - 5 11 53 152 31 51 - 4 58 4 154 32 56 - 5 14 58 153 25 52 - 3 32 23 9 27 57 57 150 -28 152 48 55 - 3 27 1 154 2 42 - 3 37 30 152 25 12 - 3 23 27 154 26 12 - 3 40 38 153 18 20 - 1 56 24 9 28 17 55 151 -28 152 41 23 - 1 50 56 153 55 10 - 2 1 37 152 17 39 - 1 47 17 154 18 41 - 2 4 49 153 9 55 - 0 18 47 9 28 37 54 152 -29 152 32 55 - 0 13 11 153 46 47 - 0 24 7 152 9 9 - 0 9 27 154 10 19 - 0 27 23 153 0 33 1 20 40 9 28 58 52 153 -29 152 23 28 1 26 25 153 37 30 1 15 13 151 59 39 1 30 14 154 1 4 1 11 51 152 50 11 3 2 9 9 29 18 51 154 -29 152 12 58 3 8 3 153 27 14 2 56 31 151 49 4 3 11 58 153 50 53 2 53 4 152 38 42 4 45 51 9 29 38 49 155 -29 152 1 19 4 51 56 153 15 55 4 40 4 151 37 18 4 55 59 153 39 39 4 36 30 152 26 1 6 32 4 9 29 59 48 156 -29 151 48 24 6 38 22 153 3 26 6 26 4 151 24 15 6 42 34 153 27 19 6 22 23 152 11 59 8 21 5 9 30 19 46 156 -30 151 34 7 8 27 38 152 49 41 8 14 51 151 9 46 8 31 59 153 13 43 8 11 2 151 56 29 10 13 16 9 30 39 44 157 -30 151 18 15 10 20 6 152 34 30 10 6 46 150 53 41 10 24 39 152 58 44 10 2 46 151 39 16 12 9 3 9 31 0 42 157 -30 151 0 37 12 16 13 152 17 41 12 2 13 150 35 46 12 20 59 152 42 10 11 58 2 151 20 6 14 8 56 9 31 20 40 158 -30 150 40 57 14 16 30 151 59 1 14 1 44 150 15 45 14 21 33 152 23 48 13 57 19 150 58 38 16 13 36 9 31 40 38 158 -29 150 18 52 16 21 39 151 38 9 16 5 58 149 53 16 16 27 0 152 3 18 16 1 16 150 34 27 18 23 52 9 32 1 36 158 -29 149 53 55 18 32 30 151 14 41 18 15 41 149 27 48 18 38 14 151 40 17 18 10 40 150 6 56 20 40 49 9 32 21 34 159 -29 149 25 27 20 50 9 150 48 3 20 31 57 148 58 43 20 56 23 151 14 12 20 26 32 149 35 14 23 5 53 9 32 41 32 159 -29 148 52 34 23 16 7 150 17 29 22 56 11 148 25 3 23 22 58 150 44 19 22 50 14 148 58 7 25 41 7 9 33 2 29 159 -28 148 13 57 25 52 32 149 41 48 25 30 18 147 45 24 26 0 10 150 9 30 25 23 42 148 13 40 28 29 31 9 33 22 26 159 -27 147 27 29 28 42 33 148 59 15 28 17 12 146 57 34 28 51 18 149 28 6 28 9 42 147 18 40 31 35 53 9 33 43 23 159 -27 146 29 37 31 51 18 148 6 53 31 21 24 145 57 45 32 1 42 148 37 21 31 12 36 146 6 59 35 8 55 9 34 3 19 158 -25 145 13 29 35 28 14 146 59 15 34 50 56 144 38 31 35 41 20 147 32 6 34 40 4 144 24 19 39 27 39 9 34 23 15 157 -24 143 22 20 39 54 51 145 23 58 39 2 50 142 41 15 40 13 42 146 1 5 38 48 3 141 15 58 45 39 36 9 34 44 8 155 -21 139 42 53 46 38 21 142 38 22 44 51 46 138 34 14 47 25 9 143 27 15 44 25 8 Uncertainty in time = +/- 5 secs Prediction of 2012 Sep 27.0 Data for the target star ------------------------ * name: TYC 7505-00877-1 * constellation : Piscis Austrinus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 22 56 14.3777 DE: -31 45 30.551 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .031, .032 ) * V mag [mag]: 9.6 * B mag [mag]: 10.1 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (751) Faina approx. diameter [km]: 130 approx. diameter ["]: .119 distance from Earth [AU]: 1.50400 * orbital information: orbit source: Preston date of fit: 2012 Sep 26 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 967 number of rejected observations: 62 time covered by the observations: 1913 May 08 - 2012 Sep 22 1 sigma uncertainty ellipse (major, minor, PA): 0.022, 0.010, 74° remarks: * orbital elements for (751) Faina : Mean anomaly = 340.44844018 deg Arg. of pericenter = 302.95001229 deg Long. of node = 78.89222246 deg Inclination = 15.61366203 deg Eccentricity = 0.15179153 Semimajor axis = 2.55029470 AU Perihelion dist = 2.16318156 AU Mag: H = 8.62, G = 0.08 Epoch of elements : MJD 56221.39000000 TDT (2012 Oct 21.390) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Oct 21 751 Faina 9h 21.5m UT 9.6 22 56 14.378-31 45 30.55TYC 7505-00877-1 10.1 12.4 130 17.2 1.504 -0.087 24.94 173.4570 -31.765 35.78 -10.90 9.3583 -0.29746 -0.01333 -0.19395 4.26457 0.00366 0.00299 2000 340.11205820121020.00000302.950012 78.892222 15.6136620.15179153 2.5502947 2.1631816 8.7 5.00.08 RATE 2.4200170 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.038 0.033 85 1.32 0.038 0 0-3-1 056197.0020121021_0877-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Sep 26, 22:30 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org