IOTA/IOTA-ES occultation update for (626) Notburga / TYC 6911-00563-1 event on 2012 Dec 06, 00:59 UT Visible from Peru, Bolivia Summary ------- On 2012 Dec 06 UT, the 77 km diameter asteroid (626) Notburga will occult a 9.2 mag star in the constellation Capricornus for observers along a path across Peru, Bolivia. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.7 mag to 13.9 mag (the magnitude of the asteroid) for at most 2.0 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: 75 * date and approx. time of event: 2012 Dec 06, 01:00 - 2012 Dec 06, 01:01 UT * geocentric midpoint of event [JD]: 2456267.5411875 * magnitude of target star: 9.2 * magnitude drop [mag]: 4.7 * estimated maximum duration [s]: 2.0 * Moon: 56 % sunlit, 144° distance * Sun: 49° distance * rough path description: Peru, Bolivia The occultation path -------------------- * approximate projected width [km]: 93 * 1 sigma uncertainty interval [path widths]: +/- 0.75 * 1 sigma uncertainty interval [seconds]: +/- 1.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .033 +/- .029) * 1 sigma uncertainty ellipse (major, minor, PA): ( .034", .029", 77° ) * approx speed of asteroid's shadow [km/s]: 38.6672 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6911-00563-1 by 626 Notburga on 2012 Dec 6 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 - 91 0 0 -33 9 59 1 0 31 45 265 -1 -33 47 28 -32 32 54 -34 44 28 -31 37 59 - 90 0 0 -32 14 49 1 0 34 44 263 -2 -32 52 5 -31 37 56 -33 48 46 -30 43 19 - 89 0 0 -31 19 41 1 0 37 43 262 -3 -31 56 44 -30 43 1 -32 53 5 -29 48 42 - 88 0 0 -30 24 38 1 0 40 42 261 -4 -31 1 28 -29 48 11 -31 57 28 -28 54 11 - 87 0 0 -29 29 44 1 0 43 41 260 -5 -30 6 20 -28 53 30 -31 1 57 -27 59 50 - 86 0 0 -28 35 1 1 0 46 40 258 -7 -29 11 23 -27 59 1 -30 6 38 -27 5 41 - 85 0 0 -27 40 33 1 0 49 39 257 -8 -28 16 40 -27 4 48 -29 11 32 -26 11 48 - 84 0 0 -26 46 22 1 0 52 38 256 -9 -27 22 14 -26 10 52 -28 16 43 -25 18 13 - 83 0 0 -25 52 32 1 0 54 36 255 -10 -26 28 8 -25 17 16 -27 22 13 -24 24 59 - 82 0 0 -24 59 5 1 0 57 35 255 -12 -25 34 26 -24 24 4 -26 28 6 -23 32 9 - 81 0 0 -24 6 3 1 0 59 34 254 -13 -24 41 8 -23 31 18 -25 34 25 -22 39 45 - 80 0 0 -23 13 30 1 1 2 33 253 -14 -23 48 19 -22 39 0 -24 41 11 -21 47 49 - 79 0 0 -22 21 27 1 1 4 32 252 -15 -22 56 0 -21 47 12 -23 48 27 -20 56 24 - 78 0 0 -21 29 56 1 1 6 31 252 -17 -22 4 14 -20 55 58 -22 56 16 -20 5 32 - 77 0 0 -20 39 1 1 1 9 30 251 -18 -21 13 2 -20 5 18 -22 4 39 -19 15 15 - 76 0 0 -19 48 42 1 1 11 28 250 -19 -20 22 28 -19 15 15 -21 13 40 -18 25 35 - 75 0 0 -18 59 3 1 1 13 27 250 -20 -19 32 32 -18 25 51 -20 23 19 -17 36 34 - 74 0 0 -18 10 3 1 1 15 26 249 -22 -18 43 16 -17 37 7 -19 33 39 -16 48 12 - 73 0 0 -17 21 45 1 1 17 25 249 -23 -17 54 43 -16 49 4 -18 44 41 -16 0 32 - 72 0 0 -16 34 11 1 1 18 24 248 -24 -17 6 53 -16 1 46 -17 56 27 -15 13 36 - 71 0 0 -15 47 22 1 1 20 23 248 -25 -16 19 48 -15 15 11 -17 8 58 -14 27 24 - 70 0 0 -15 1 18 1 1 22 21 247 -26 -15 33 29 -14 29 23 -16 22 15 -13 41 58 - 69 0 0 -14 16 2 1 1 23 20 247 -28 -14 47 58 -13 44 22 -15 36 20 -12 57 18 - 68 0 0 -13 31 34 1 1 25 19 247 -29 -14 3 15 -13 0 8 -14 51 14 -12 13 26 - 67 0 0 -12 47 55 1 1 26 18 246 -30 -13 19 21 -12 16 44 -14 6 57 -11 30 23 - 66 0 0 -12 5 6 1 1 27 17 246 -31 -12 36 17 -11 34 9 -13 23 31 -10 48 8 - 65 0 0 -11 23 7 1 1 28 15 246 -33 -11 54 4 -10 52 24 -12 40 56 -10 6 44 - 64 0 0 -10 42 0 1 1 29 14 246 -34 -11 12 43 -10 11 31 -11 59 12 - 9 26 11 - 63 0 0 -10 1 44 1 1 30 13 245 -35 -10 32 13 - 9 31 29 -11 18 22 - 8 46 29 - 62 0 0 - 9 22 21 1 1 31 12 245 -36 - 9 52 36 - 8 52 19 -10 38 24 - 8 7 38 - 61 0 0 - 8 43 50 1 1 32 11 245 -37 - 9 13 52 - 8 14 1 - 9 59 19 - 7 29 39 - 60 0 0 - 8 6 13 1 1 33 10 245 -38 - 8 36 1 - 7 36 36 - 9 21 9 - 6 52 33 - 59 0 0 - 7 29 28 1 1 34 8 245 -40 - 7 59 4 - 7 0 4 - 8 43 52 - 6 16 19 - 58 0 0 - 6 53 37 1 1 34 7 244 -41 - 7 23 1 - 6 24 25 - 8 7 29 - 5 40 58 - 57 0 0 - 6 18 39 1 1 35 6 244 -42 - 6 47 51 - 5 49 39 - 7 32 1 - 5 6 30 - 56 0 0 - 5 44 35 1 1 35 5 244 -43 - 6 13 35 - 5 15 47 - 6 57 27 - 4 32 54 - 55 0 0 - 5 11 25 1 1 35 4 244 -44 - 5 40 13 - 4 42 48 - 6 23 47 .. .. .. - 54 0 0 - 4 39 8 1 1 35 3 244 -45 - 5 7 46 - 4 10 42 - 5 51 2 .. .. .. - 53 0 0 - 4 7 45 1 1 36 2 244 -46 - 4 36 12 - 3 39 30 - 5 19 12 .. .. .. - 52 0 0 - 3 37 16 1 1 36 1 244 -47 - 4 5 32 - 3 9 11 - 4 48 16 .. .. .. Uncertainty in time = +/- 2 secs Prediction of 2012 Dec 3.0 Data for the target star ------------------------ * name: TYC 6911-00563-1 * constellation : Capricornus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 20 28 54.9972 DE: -26 09 50.430 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .028, .028 ) * V mag [mag]: 9.2 * B mag [mag]: 10.2 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (626) Notburga approx. diameter [km]: 77 approx. diameter ["]: .039 distance from Earth [AU]: 2.70200 * orbital information: orbit source: Preston date of fit: 2012 Jul 10 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 899 number of rejected observations: 51 time covered by the observations: 1907 Feb 11 - 2012 Apr 03 1 sigma uncertainty ellipse (major, minor, PA): 0.020, 0.008, 51° remarks: * orbital elements for (626) Notburga : Mean anomaly = 318.81220941 deg Arg. of pericenter = 43.82047890 deg Long. of node = 341.67856481 deg Inclination = 25.35087679 deg Eccentricity = 0.24174946 Semimajor axis = 2.57440312 AU Perihelion dist = 1.95204256 AU Mag: H = 9.08, G = 0.15 Epoch of elements : MJD 56267.04100000 TDT (2012 Dec 06.041) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Dec 6 626 Notburga 0h 59.3m UT 9.2 20 28 54.997-26 9 50.43TYC 6911-00563-1 10.3 13.9 77 2.0 2.702 4.568 35.54 -142.8221 -26.174 162.93 -22.51 0.9885 0.27822 -0.48141 18.89610 10.92072 0.00426 0.00061 2000 317.13215420121129.00000 43.820479341.678565 25.3508770.24174946 2.5744031 1.9520426 9.0 5.00.15 RATE 2.3861030 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.034 0.029 77 1.75 0.029 0 0 2 0 056264.0020121206_0563-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Jul 10, 04:30 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org