IOTA/IOTA-ES occultation update for (58) Concordia / TYC 1314-00411-1 event on 2009 Nov 05, 00:37 UT Visible from Summary ------- On 2009 Nov 05 UT, the 93 km diameter asteroid (58) Concordia will occult a 10.6 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 3.0 mag to 13.5 mag (the magnitude of the asteroid) for at most 33.2 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: 90 * date and approx. time of event: 2009 Nov 06, 00:04 - 2009 Nov 06, 01:13 UT * magnitude of target star: 10.6 * magnitude drop [mag]: 3.0 * estimated maximum duration [s]: 33.2 * Moon: 94 % sunlit, 25° distance * Sun: 129° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 95 * 1 sigma uncertainty interval [path widths]: +/- 0.52 * 1 sigma uncertainty interval [seconds]: +/- 16.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .033 +/- .033) * 1 sigma uncertainty ellipse (major, minor, PA): ( .033", .033", 360° ) * approx speed of asteroid's shadow [km/s]: 2.8121 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1314-00411-1 by 58 Concordia on 2009 Nov 4 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 - 45 44 15 -31 0 0 25 13 37 2 69 -38 - 47 7 19 - 44 24 22 - 48 37 38 - 43 4 15 - 42 53 49 -30 0 0 25 13 31 5 68 -40 - 44 9 42 - 41 40 18 - 45 31 27 - 40 26 5 Latitude Latitude Latitude Latitude - 42 0 0 -29 39 49 25 13 27 6 67 -41 -29 12 7 -30 7 30 -28 43 16 -30 36 14 - 41 0 0 -29 16 37 25 13 23 7 67 -42 -28 48 48 -29 44 25 -28 19 49 -30 13 18 - 40 0 0 -28 52 41 25 13 19 8 66 -42 -28 24 44 -29 20 36 -27 55 37 -29 49 37 - 39 0 0 -28 28 0 25 13 13 9 66 -43 -27 59 55 -28 56 3 -27 30 40 -29 25 11 - 38 0 0 -28 2 33 25 13 7 10 65 -44 -27 34 21 -28 30 44 -27 4 58 -29 0 1 - 37 0 0 -27 36 22 25 13 0 11 65 -45 -27 8 2 -28 4 41 -26 38 31 -28 34 6 - 36 0 0 -27 9 26 25 12 53 12 65 -45 -26 40 58 -27 37 53 -26 11 18 -28 7 26 - 35 0 0 -26 41 45 25 12 45 13 64 -46 -26 13 8 -27 10 20 -25 43 20 -27 40 2 - 34 0 0 -26 13 18 25 12 36 14 64 -47 -25 44 33 -26 42 2 -25 14 37 -27 11 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55 1 43 24 7 41 38 242 -7 55 28 51 54 34 38 55 57 7 54 6 31 95 0 0 55 13 14 24 7 27 37 242 -7 55 40 16 54 46 15 56 8 26 54 18 14 96 0 0 55 24 17 24 7 13 37 243 -6 55 51 13 54 57 24 56 19 17 54 29 29 97 0 0 55 34 53 24 6 59 36 244 -6 56 1 44 55 8 6 56 29 41 54 40 17 98 0 0 55 45 3 24 6 46 35 245 -5 56 11 47 55 18 21 56 39 39 54 50 37 99 0 0 55 54 45 24 6 33 35 246 -5 56 21 25 55 28 9 56 49 11 55 0 31 100 0 0 56 4 2 24 6 20 34 247 -4 56 30 36 55 37 30 56 58 17 55 9 58 101 0 0 56 12 53 24 6 8 34 247 -4 56 39 22 55 46 26 57 6 58 55 18 58 102 0 0 56 21 17 24 5 56 33 248 -4 56 47 42 55 54 55 57 15 13 55 27 33 103 0 0 56 29 17 24 5 44 33 249 -3 56 55 37 56 2 59 57 23 3 55 35 41 104 0 0 56 36 51 24 5 32 32 250 -3 57 3 7 56 10 38 57 30 28 55 43 24 105 0 0 56 44 1 24 5 21 32 251 -2 57 10 12 56 17 51 57 37 29 55 50 42 106 0 0 56 50 45 24 5 9 31 252 -2 57 16 53 56 24 40 57 44 5 55 57 35 107 0 0 56 57 5 24 4 58 31 252 -1 57 23 9 56 31 4 57 50 18 56 4 2 108 0 0 57 3 1 24 4 47 30 253 -1 57 29 1 56 37 3 57 56 6 56 10 5 109 0 0 57 8 32 24 4 37 30 254 -1 57 34 29 56 42 38 58 1 31 56 15 44 110 0 0 57 13 40 24 4 26 29 255 0 57 39 34 56 47 49 58 6 32 56 20 57 Uncertainty in time = +/- 17 secs [Prediction of 2008 Mar 20.0] Data for the target star ------------------------ * name: TYC 1314-00411-1 * constellation : Orion * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 06 14 53.1072 DE: +16 31 53.893 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .023, .030 ) * V mag [mag]: 10.6 * B mag [mag]: 11.0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (58) Concordia approx. diameter [km]: 93 approx. diameter ["]: .064 distance from Earth [AU]: 2.01900 * orbital information: orbit source: Preston date of fit: 2008 Mar 20 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 840 number of rejected observations: 134 time covered by the observations: 1900 Mar 28 - 2007 Aug 25 1 sigma uncertainty ellipse (major, minor, PA): 0.024, 0.015, 88° remarks: * orbital elements for (58) Concordia : Mean anomaly = 247.78318905 deg Arg. of pericenter = 32.89090645 deg Long. of node = 161.18919794 deg Inclination = 5.06046005 deg Eccentricity = 0.04462992 Semimajor axis = 2.69939522 AU Perihelion dist = 2.57892143 AU Mag: H = 8.87, G = 0.15 Epoch of elements : MJD 55140.02600000 TDT (2009 Nov 05.026) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Nov 5 58 Concordia 0h 36.6m UT 10.6 6 14 53.107 16 31 53.89TYC 1314-00411-1 11.1 13.5 93 33.2 2.019 -0.346 -4.82 40.1869 16.533 166.75 -15.66 0.6100 -0.13137 0.13590 -1.13793 -1.10650 -0.00451 0.00055 2000 245.55510220091026.00000 32.890906161.189198 5.0604600.04462992 2.6993952 2.5789214 8.9 5.00.15 RATE 2.2223090 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.033 0.033 360 1.52 0.033 0 54545.5020091105_0411-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 20, 16:07 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org