IOTA/IOTA-ES occultation update for (1416) Renauxa / TYC 2388-01389-1 event on 2009 Aug 04, 10:58 UT Visible from Summary ------- On 2009 Aug 04 UT, the 29 km diameter asteroid (1416) Renauxa will occult a 10.3 mag star in the constellation Auriga 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 16.0 mag (the magnitude of the asteroid) for at most 0.8 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: 37 * date and approx. time of event: 2009 Aug 04, 10:55 - 2009 Aug 04, 10:57 UT * magnitude of target star: 10.3 * magnitude drop [mag]: 5.7 * estimated maximum duration [s]: 0.8 * Moon: 98 % sunlit, 141° distance * Sun: 56° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 30 * 1 sigma uncertainty interval [path widths]: +/- 1.78 * 1 sigma uncertainty interval [seconds]: +/- 1.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .032 +/- .023) * 1 sigma uncertainty ellipse (major, minor, PA): ( .032", .023", 84° ) * approx speed of asteroid's shadow [km/s]: 34.7702 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 2388-01389-1 by 1416 Renauxa on 2009 Aug 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 ' " Latitude Latitude Latitude Latitude -132 0 0 0 50 0 10 55 44 1 59 -55 0 40 35 0 59 25 .. .. .. 1 33 1 -131 0 0 1 26 10 10 55 44 2 59 -54 1 16 44 1 35 37 0 43 11 2 9 19 -130 0 0 2 2 42 10 55 44 3 59 -53 1 53 14 2 12 10 1 19 36 2 45 57 -129 0 0 2 39 34 10 55 44 4 59 -52 2 30 4 2 49 4 1 56 21 3 22 56 -128 0 0 3 16 45 10 55 45 5 60 -50 3 7 14 3 26 16 2 33 26 4 0 14 -127 0 0 3 54 15 10 55 45 6 60 -49 3 44 43 4 3 47 3 10 49 4 37 50 -126 0 0 4 32 2 10 55 46 8 60 -48 4 22 28 4 41 36 3 48 30 5 15 43 -125 0 0 5 10 5 10 55 46 9 60 -47 5 0 30 5 19 40 4 26 27 5 53 51 -124 0 0 5 48 22 10 55 47 10 60 -46 5 38 46 5 57 59 5 4 39 6 32 14 -123 0 0 6 26 53 10 55 48 11 60 -44 6 17 16 6 36 31 5 43 6 7 10 51 -122 0 0 7 5 37 10 55 48 12 60 -43 6 55 59 7 15 16 6 21 44 7 49 40 -121 0 0 7 44 32 10 55 49 14 60 -42 7 34 53 7 54 12 7 0 34 8 28 39 -120 0 0 8 23 36 10 55 50 15 60 -41 8 13 56 8 33 17 7 39 35 9 7 48 -119 0 0 9 2 49 10 55 51 16 61 -40 8 53 8 9 12 31 8 18 44 9 47 5 -118 0 0 9 42 10 10 55 52 17 61 -39 9 32 28 9 51 52 8 58 0 10 26 29 -117 0 0 10 21 35 10 55 53 18 61 -37 10 11 53 10 31 18 9 37 23 11 5 58 -116 0 0 11 1 6 10 55 55 19 61 -36 10 51 23 11 10 49 10 16 50 11 45 31 -115 0 0 11 40 39 10 55 56 21 61 -35 11 30 55 11 50 23 10 56 21 12 25 7 -114 0 0 12 20 14 10 55 57 22 62 -34 12 10 30 12 29 59 11 35 53 13 4 44 -113 0 0 12 59 49 10 55 59 23 62 -33 12 50 4 13 9 34 12 15 27 13 44 21 -112 0 0 13 39 23 10 56 1 24 62 -31 13 29 38 13 49 8 12 54 59 14 23 56 -111 0 0 14 18 54 10 56 2 25 63 -30 14 9 9 14 28 39 13 34 29 15 3 28 -110 0 0 14 58 21 10 56 4 27 63 -29 14 48 36 15 8 7 14 13 55 15 42 56 -109 0 0 15 37 43 10 56 6 28 63 -28 15 27 57 15 47 29 14 53 17 16 22 18 -108 0 0 16 16 58 10 56 7 29 64 -27 16 7 12 16 26 44 15 32 32 17 1 33 -107 0 0 16 56 4 10 56 9 30 64 -26 16 46 19 17 5 50 16 11 39 17 40 40 -106 0 0 17 35 2 10 56 11 31 64 -24 17 25 17 17 44 47 16 50 37 18 19 36 -105 0 0 18 13 48 10 56 13 32 65 -23 18 4 3 18 23 34 17 29 25 18 58 21 -104 0 0 18 52 23 10 56 15 33 65 -22 18 42 38 19 2 7 18 8 1 19 36 54 -103 0 0 19 30 43 10 56 17 35 66 -21 19 20 59 19 40 28 18 46 24 20 15 13 -102 0 0 20 8 50 10 56 20 36 66 -20 19 59 6 20 18 34 19 24 33 20 53 17 -101 0 0 20 46 40 10 56 22 37 67 -19 20 36 57 20 56 24 20 2 26 21 31 4 -100 0 0 21 24 14 10 56 24 38 67 -18 21 14 32 21 33 57 20 40 2 22 8 35 - 99 0 0 22 1 29 10 56 26 39 68 -17 21 51 48 22 11 11 21 17 21 22 45 47 - 98 0 0 22 38 25 10 56 29 40 68 -15 22 28 45 22 48 7 21 54 21 23 22 39 - 97 0 0 23 15 1 10 56 31 41 69 -14 23 5 22 23 24 41 22 31 1 23 59 11 - 96 0 0 23 51 16 10 56 33 42 69 -13 23 41 37 24 0 55 23 7 20 24 35 21 - 95 0 0 24 27 8 10 56 36 43 70 -12 24 17 31 24 36 46 23 43 18 25 11 8 - 94 0 0 25 2 38 10 56 38 44 71 -11 24 53 1 25 12 15 24 18 52 25 46 32 - 93 0 0 25 37 43 10 56 41 45 71 -10 25 28 7 25 47 19 24 54 3 26 21 32 - 92 0 0 26 12 23 10 56 43 46 72 -9 26 2 49 26 21 58 25 28 49 26 56 7 - 91 0 0 26 46 38 10 56 46 48 73 -8 26 37 5 26 56 11 26 3 9 27 30 15 - 90 0 0 27 20 26 10 56 49 49 74 -7 27 10 55 27 29 58 26 37 4 28 3 57 - 89 0 0 27 53 48 10 56 51 50 74 -6 27 44 18 28 3 18 27 10 32 28 37 12 - 88 0 0 28 26 41 10 56 54 51 75 -5 28 17 13 28 36 10 27 43 32 29 9 59 - 87 0 0 28 59 7 10 56 57 52 76 -4 28 49 40 29 8 34 28 16 4 29 42 18 - 86 0 0 29 31 3 10 56 59 53 77 -3 29 21 38 29 40 29 28 48 8 30 14 7 - 85 0 0 30 2 31 10 57 2 53 78 -2 29 53 7 30 11 55 29 19 43 30 45 27 - 84 0 0 30 33 28 10 57 5 54 79 -1 30 24 6 30 42 51 29 50 48 31 16 17 Uncertainty in time = +/- 2 secs [Prediction of 2008 Apr 25.0] Data for the target star ------------------------ * name: TYC 2388-01389-1 * constellation : Auriga * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 04 58 45.9490 DE: +30 37 42.962 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .017, .018 ) * V mag [mag]: 10.3 * B mag [mag]: 11.8 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1416) Renauxa approx. diameter [km]: 29 approx. diameter ["]: .013 distance from Earth [AU]: 3.14700 * orbital information: orbit source: Preston date of fit: 2008 Apr 25 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 736 number of rejected observations: 38 time covered by the observations: 1919 Sep 22 - 2007 Jul 20 1 sigma uncertainty ellipse (major, minor, PA): 0.027, 0.015, 82° remarks: * orbital elements for (1416) Renauxa : Mean anomaly = 1.31330524 deg Arg. of pericenter = 64.57501155 deg Long. of node = 352.69164131 deg Inclination = 10.04227500 deg Eccentricity = 0.10274134 Semimajor axis = 3.01837253 AU Perihelion dist = 2.70826090 AU Mag: H = 10.50, G = 0.15 Epoch of elements : MJD 55047.45700000 TDT (2009 Aug 04.457) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Aug 4 1416 Renauxa 10h 58.7m UT 10.3 4 58 45.949 30 37 42.96TYC 2388-01389-1 11.8 16.0 29 0.8 3.147 4.148 11.86 -43.1313 30.625 16.85 17.14 10.9785 -0.04892 0.22099 19.16100 4.24357 -0.00456 -0.00005 2000 359.9117542009 728.00000 64.575012352.691641 10.0422750.10274134 3.0183725 2.708260910.4 5.00.15 RATE 1.8795110 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.032 0.023 84 2.78 0.023 0 54581.5020090804_1389-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Apr 25, 07:49 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org