IOTA/IOTA-ES occultation update for (680) Genoveva / TYC 2916-02357-1 event on 2012 Nov 28, 05:12 UT Visible from S USA, Mexico Summary ------- On 2012 Nov 28 UT, the 83 km diameter asteroid (680) Genoveva will occult a 11.0 mag star in the constellation Auriga for observers along a path across S USA, Mexico. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.3 mag to 15.3 mag (the magnitude of the asteroid) for at most 5.0 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: 76 * date and approx. time of event: 2012 Nov 28, 05:06 - 2012 Nov 28, 05:18 UT * geocentric midpoint of event [JD]: 2456259.7170875 * magnitude of target star: 11.0 * magnitude drop [mag]: 4.3 * estimated maximum duration [s]: 5.0 * Moon: 100 % sunlit, 31° distance * Sun: 153° distance * rough path description: S USA, Mexico The occultation path -------------------- * approximate projected width [km]: 84 * 1 sigma uncertainty interval [path widths]: +/- 0.74 * 1 sigma uncertainty interval [seconds]: +/- 3.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .029 +/- .027) * 1 sigma uncertainty ellipse (major, minor, PA): ( .029", .027", 83° ) * approx speed of asteroid's shadow [km/s]: 16.6581 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 2916-02357-1 by 680 Genoveva on 2012 Nov 28 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 -154 0 0 8 7 19 5 18 55 1 50 -20 8 36 59 7 37 36 9 20 46 6 53 31 -153 0 0 8 56 35 5 18 54 2 50 -22 9 26 5 8 27 2 10 9 39 7 43 11 -152 0 0 9 45 6 5 18 54 4 50 -23 10 14 26 9 15 43 10 57 46 8 32 6 -151 0 0 10 32 50 5 18 53 5 51 -24 11 2 1 10 3 36 11 45 6 9 20 14 -150 0 0 11 19 47 5 18 52 6 51 -25 11 48 48 10 50 43 12 31 38 10 7 36 -149 0 0 12 5 55 5 18 51 8 51 -26 12 34 46 11 37 1 13 17 22 10 54 9 -148 0 0 12 51 14 5 18 50 9 51 -27 13 19 55 12 22 30 14 2 17 11 39 53 -147 0 0 13 35 44 5 18 49 10 51 -29 14 4 15 13 7 10 14 46 22 12 24 47 -146 0 0 14 19 23 5 18 47 11 52 -30 14 47 44 13 50 59 15 29 37 13 8 51 -145 0 0 15 2 12 5 18 46 12 52 -31 15 30 23 14 33 58 16 12 1 13 52 5 -144 0 0 15 44 10 5 18 44 14 52 -32 16 12 11 15 16 6 16 53 34 14 34 28 -143 0 0 16 25 17 5 18 42 15 52 -33 16 53 8 15 57 23 17 34 17 15 15 59 -142 0 0 17 5 32 5 18 40 16 53 -34 17 33 14 16 37 48 18 14 8 15 56 39 -141 0 0 17 44 56 5 18 38 17 53 -35 18 12 28 17 17 22 18 53 8 16 36 28 -140 0 0 18 23 29 5 18 35 18 53 -36 18 50 51 17 56 4 19 31 16 17 15 25 -139 0 0 19 1 10 5 18 33 19 54 -37 19 28 22 18 33 55 20 8 33 17 53 30 -138 0 0 19 37 59 5 18 30 20 54 -38 20 5 2 19 10 54 20 45 0 18 30 43 -137 0 0 20 13 58 5 18 28 21 54 -39 20 40 51 19 47 2 21 20 35 19 7 5 -136 0 0 20 49 5 5 18 25 23 54 -40 21 15 50 20 22 19 21 55 20 19 42 36 -135 0 0 21 23 22 5 18 22 24 55 -41 21 49 57 20 56 45 22 29 14 20 17 16 -134 0 0 21 56 48 5 18 19 25 55 -42 22 23 15 21 30 20 23 2 18 20 51 5 -133 0 0 22 29 25 5 18 16 26 55 -43 22 55 42 22 3 5 23 34 32 21 24 3 -132 0 0 23 1 11 5 18 13 27 56 -44 23 27 19 22 35 0 24 5 56 21 56 11 -131 0 0 23 32 7 5 18 10 28 56 -45 23 58 7 23 6 5 24 36 32 22 27 29 -130 0 0 24 2 15 5 18 6 29 56 -46 24 28 6 23 36 21 25 6 19 22 57 58 -129 0 0 24 31 34 5 18 3 30 57 -47 24 57 17 24 5 49 25 35 17 23 27 37 -128 0 0 25 0 5 5 17 59 31 57 -48 25 25 40 24 34 27 26 3 28 23 56 28 -127 0 0 25 27 47 5 17 56 32 58 -49 25 53 14 25 2 18 26 30 51 24 24 31 -126 0 0 25 54 43 5 17 52 33 58 -50 26 20 2 25 29 22 26 57 27 24 51 46 -125 0 0 26 20 51 5 17 49 34 58 -51 26 46 3 25 55 38 27 23 17 25 18 14 -124 0 0 26 46 14 5 17 45 35 59 -52 27 11 18 26 21 7 27 48 21 25 43 54 -123 0 0 27 10 50 5 17 41 36 59 -53 27 35 47 26 45 51 28 12 39 26 8 49 -122 0 0 27 34 41 5 17 37 37 59 -54 27 59 30 27 9 49 28 36 12 26 32 57 -121 0 0 27 57 46 5 17 33 38 60 -54 28 22 29 27 33 1 28 59 1 26 56 20 -120 0 0 28 20 7 5 17 29 39 60 -55 28 44 44 27 55 29 29 21 5 27 18 58 -119 0 0 28 41 45 5 17 25 40 60 -56 29 6 14 28 17 13 29 42 26 27 40 51 -118 0 0 29 2 38 5 17 21 41 61 -57 29 27 2 28 38 13 30 3 4 28 2 1 -117 0 0 29 22 49 5 17 17 41 61 -58 29 47 6 28 58 30 30 23 0 28 22 27 -116 0 0 29 42 17 5 17 13 42 62 -59 30 6 28 29 18 4 30 42 13 28 42 10 -115 0 0 30 1 3 5 17 9 43 62 -59 30 25 8 29 36 55 31 0 45 29 1 10 -114 0 0 30 19 7 5 17 5 44 62 -60 30 43 7 29 55 5 31 18 35 29 19 28 -113 0 0 30 36 30 5 17 0 45 63 -61 31 0 24 30 12 33 31 35 45 29 37 4 -112 0 0 30 53 12 5 16 56 46 63 -62 31 17 1 30 29 20 31 52 14 29 53 59 -111 0 0 31 9 13 5 16 52 47 63 -62 31 32 58 30 45 27 32 8 3 30 10 13 -110 0 0 31 24 35 5 16 47 48 64 -63 31 48 15 31 0 54 32 23 13 30 25 47 -109 0 0 31 39 17 5 16 43 48 64 -64 32 2 52 31 15 40 32 37 43 30 40 40 -108 0 0 31 53 20 5 16 39 49 64 -65 32 16 50 31 29 47 32 51 35 30 54 54 -107 0 0 32 6 44 5 16 34 50 65 -65 32 30 10 31 43 16 33 4 49 31 8 29 -106 0 0 32 19 29 5 16 30 51 65 -66 32 42 51 31 56 5 33 17 24 31 21 24 -105 0 0 32 31 36 5 16 25 52 65 -67 32 54 55 32 8 16 33 29 22 31 33 41 -104 0 0 32 43 6 5 16 21 53 66 -67 33 6 21 32 19 50 33 40 43 31 45 20 -103 0 0 32 53 58 5 16 16 53 66 -68 33 17 10 32 30 45 33 51 26 31 56 21 -102 0 0 33 4 13 5 16 11 54 66 -69 33 27 21 32 41 3 34 1 33 32 6 44 -101 0 0 33 13 51 5 16 7 55 67 -69 33 36 56 32 50 45 34 11 3 32 16 29 -100 0 0 33 22 52 5 16 2 56 67 -70 33 45 55 32 59 49 34 19 58 32 25 38 - 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9 37 47 -10 40 35 - 8 51 29 -11 27 14 6 0 0 -11 5 10 5 6 29 14 316 0 -10 33 46 -11 36 37 - 9 47 26 -12 23 18 Uncertainty in time = +/- 4 secs Prediction of 2012 Nov 16.0 Data for the target star ------------------------ * name: TYC 2916-02357-1 * constellation : Auriga * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 05 52 37.0871 DE: +39 39 12.258 * position source: mpos:UCAC4 pm:UCAC4 * standard error: RA,DE ["]: ( .019, .020 ) * V mag [mag]: 11.0 * B mag [mag]: 12.2 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (680) Genoveva approx. diameter [km]: 83 approx. diameter ["]: .037 distance from Earth [AU]: 3.08100 * orbital information: orbit source: Preston date of fit: 2012 Nov 16 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1017 number of rejected observations: 59 time covered by the observations: 1909 Apr 22 - 2012 Nov 12 1 sigma uncertainty ellipse (major, minor, PA): 0.022, 0.018, 78° remarks: * orbital elements for (680) Genoveva : Mean anomaly = 147.49757844 deg Arg. of pericenter = 244.86420617 deg Long. of node = 38.51367245 deg Inclination = 17.53126120 deg Eccentricity = 0.28846990 Semimajor axis = 3.15966696 AU Perihelion dist = 2.24819816 AU Mag: H = 9.45, G = 0.15 Epoch of elements : MJD 56259.21700000 TDT (2012 Nov 28.217) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Nov 28 680 Genoveva 5h 12.6m UT 11.0 5 52 37.087 39 39 12.26TYC 2916-02357-1 12.2 15.3 83 5.0 3.081 -2.208 8.38 -57.5089 39.651 98.86 -21.37 5.2101 -0.04735 -0.14385 -8.93200 2.93650 -0.00228 -0.00160 2000 145.88012520121119.00000244.864206 38.513672 17.5312610.28846990 3.1596670 2.2481981 9.3 5.00.15 RATE 1.7548580 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.029 0.027 83 1.74 0.027 0 0 1-2 056247.0020121128_2357-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Nov 16, 09:03 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org