IOTA/IOTA-ES occultation update for (6039) Parmenides / TYC 0093-00944-1 event on 2009 Dec 03, 12:31 UT Visible from Summary ------- On 2009 Dec 03 UT, the 18 km diameter asteroid (6039) Parmenides will occult a 10.5 mag star in the constellation Orion for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.7 mag to 16.2 mag (the magnitude of the asteroid) for at most 1.3 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: 8 * date and approx. time of event: 2009 Dec 03, 12:25 - 2009 Dec 03, 12:37 UT * magnitude of target star: 10.5 * magnitude drop [mag]: 5.7 * estimated maximum duration [s]: 1.3 * Moon: 98 % sunlit, 23° distance * Sun: 163° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 22 * 1 sigma uncertainty interval [path widths]: +/- 8.26 * 1 sigma uncertainty interval [seconds]: +/- 15.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .127 +/- .080) * 1 sigma uncertainty ellipse (major, minor, PA): ( .127", .080", 89° ) * approx speed of asteroid's shadow [km/s]: 13.8980 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0093-00944-1 by 6039 Parmenides on 2009 Dec 3 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 81 0 0 23 11 18 12 37 33 0 84 -11 23 17 23 23 5 14 24 59 3 .. .. .. 82 0 0 23 17 24 12 37 33 1 85 -12 23 23 29 23 11 19 25 5 11 .. .. .. 83 0 0 23 23 46 12 37 32 2 85 -13 23 29 51 23 17 41 25 11 37 .. .. .. 84 0 0 23 30 24 12 37 32 3 85 -14 23 36 29 23 24 19 25 18 18 .. .. .. 85 0 0 23 37 18 12 37 31 4 86 -15 23 43 23 23 31 12 25 25 15 .. .. .. 86 0 0 23 44 27 12 37 31 5 86 -16 23 50 33 23 38 22 25 32 28 .. .. .. 87 0 0 23 51 52 12 37 30 6 87 -16 23 57 58 23 45 47 25 39 57 .. .. .. 88 0 0 23 59 33 12 37 29 7 87 -17 24 5 39 23 53 27 25 47 41 .. .. .. 89 0 0 24 7 29 12 37 28 8 87 -18 24 13 35 24 1 23 25 55 41 .. .. .. 90 0 0 24 15 39 12 37 26 9 88 -19 24 21 46 24 9 33 26 3 55 .. .. .. 91 0 0 24 24 5 12 37 25 10 88 -20 24 30 12 24 17 58 26 12 25 22 38 11 92 0 0 24 32 45 12 37 23 10 89 -21 24 38 52 24 26 38 26 21 9 22 46 48 93 0 0 24 41 39 12 37 22 11 89 -22 24 47 46 24 35 32 26 30 8 22 55 38 94 0 0 24 50 48 12 37 20 12 90 -23 24 56 55 24 44 40 26 39 21 23 4 42 95 0 0 25 0 10 12 37 18 13 90 -24 25 6 18 24 54 3 26 48 48 23 14 1 96 0 0 25 9 46 12 37 16 14 90 -25 25 15 55 25 3 39 26 58 29 23 23 33 97 0 0 25 19 36 12 37 13 15 91 -26 25 25 45 25 13 28 27 8 23 23 33 18 98 0 0 25 29 39 12 37 11 16 91 -26 25 35 48 25 23 31 27 18 31 23 43 17 99 0 0 25 39 55 12 37 8 17 92 -27 25 46 4 25 33 47 27 28 52 23 53 28 100 0 0 25 50 24 12 37 6 18 92 -28 25 56 33 25 44 15 27 39 26 24 3 53 101 0 0 26 1 6 12 37 3 18 93 -29 26 7 15 25 54 57 27 50 12 24 14 29 102 0 0 26 11 59 12 37 0 19 93 -30 26 18 9 26 5 50 28 1 11 24 25 19 103 0 0 26 23 5 12 36 57 20 94 -31 26 29 15 26 16 56 28 12 22 24 36 20 104 0 0 26 34 23 12 36 54 21 94 -32 26 40 33 26 28 13 28 23 44 24 47 32 105 0 0 26 45 52 12 36 50 22 95 -33 26 52 2 26 39 42 28 35 19 24 58 57 106 0 0 26 57 32 12 36 47 23 95 -34 27 3 43 26 51 22 28 47 4 25 10 33 107 0 0 27 9 24 12 36 43 24 96 -35 27 15 35 27 3 13 28 59 1 25 22 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Uncertainty in time = +/- 16 secs [Prediction of 2008 Apr 25.0] Data for the target star ------------------------ * name: TYC 0093-00944-1 * constellation : Orion * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 04 58 45.6198 DE: +05 30 55.022 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .022, .022 ) * V mag [mag]: 10.5 * B mag [mag]: 11.6 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (6039) Parmenides approx. diameter [km]: 18 approx. diameter ["]: .010 distance from Earth [AU]: 2.38300 * orbital information: orbit source: Preston date of fit: 2008 Apr 25 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 520 number of rejected observations: 13 time covered by the observations: 1951 Sep 09 - 2007 Sep 16 1 sigma uncertainty ellipse (major, minor, PA): 0.125, 0.077, 89° remarks: * orbital elements for (6039) Parmenides : Mean anomaly = 65.70074356 deg Arg. of pericenter = 175.60010909 deg Long. of node = 186.14957765 deg Inclination = 13.11058684 deg Eccentricity = 0.05876059 Semimajor axis = 3.40949360 AU Perihelion dist = 3.20914976 AU Mag: H = 11.54, G = 0.15 Epoch of elements : MJD 55168.52200000 TDT (2009 Dec 03.522) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Dec 3 6039 Parmenides 12h 31.4m UT 10.5 4 58 45.620 5 30 55.02TYC 0093-00944-1 11.6 16.2 18 1.3 2.383 -1.888 -6.56 174.3729 5.518 -10.37 -22.16 12.5230 -0.13392 0.57532 -7.64015 -1.77855 -0.00049 0.00172 2000 64.36657520091125.00000175.600109186.149578 13.1105870.05876059 3.4094936 3.209149711.3 5.00.15 RATE 1.5655590 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.127 0.080 89 9.26 0.086 0 54581.5020091203_0944-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Apr 25, 09:57 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org