IOTA/IOTA-ES occultation update for (647) Adelgunde / TYC 0820-00182-1 event on 2007 Nov 01, 18:11 UT Visible from E Russia Summary ------- On 2007 Nov 01 UT, the 17 km diameter asteroid (647) Adelgunde will occult a 9.4 mag star in the constellation Leo for observers along a path across E Russia. In the case of an occultation, the combined light of the asteroid and the star will drop by 6.3 mag to 15.7 mag (the magnitude of the asteroid) for at most 0.7 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: 36 * date and approx. time of event: 2007 Nov 01, 18:07 - 2007 Nov 01, 18:15 UT * midpoint of event [JD]: 2454406.25785833 * magnitude of target star: 9.4 * magnitude drop [mag]: 6.3 * estimated maximum duration [s]: 0.7 * Moon: 52 % sunlit, 17° distance * Sun: 77° distance * rough path description: E Russia The occultation path -------------------- * approximate projected width [km]: 19 * 1 sigma uncertainty interval [path widths]: +/- 1.85 * 1 sigma uncertainty interval [seconds]: +/- 1.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .030 +/- .022) * 1 sigma uncertainty ellipse (major, minor, PA): ( .031", .021", 100° ) * approx speed of asteroid's shadow [km/s]: 24.8205 * website for maps: http://lunar-occultations.com/iota/asteroids/astrndx.htm http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0820-00182-1 by 647 Adelgunde on 2007 Nov 01 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 88 0 0 .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 50 29 35 89 0 0 50 15 35 18 7 24 1 75 -54 50 10 23 50 20 47 49 51 10 50 40 4 90 0 0 50 25 45 18 7 24 1 76 -54 50 20 33 50 30 56 50 1 23 50 50 11 91 0 0 50 35 32 18 7 24 2 77 -53 50 30 21 50 40 43 50 11 14 50 59 55 92 0 0 50 44 57 18 7 24 3 78 -53 50 39 47 50 50 7 50 20 42 51 9 17 93 0 0 50 53 59 18 7 25 3 78 -53 50 48 50 50 59 9 50 29 47 51 18 16 94 0 0 51 2 40 18 7 25 4 79 -53 50 57 31 51 7 49 50 38 31 51 26 54 95 0 0 51 10 59 18 7 25 5 80 -52 51 5 50 51 16 7 50 46 52 51 35 9 96 0 0 51 18 55 18 7 25 5 81 -52 51 13 48 51 24 3 50 54 52 51 43 3 97 0 0 51 26 30 18 7 26 6 81 -52 51 21 23 51 31 38 51 2 29 51 50 36 98 0 0 51 33 44 18 7 26 6 82 -51 51 28 37 51 38 50 51 9 45 51 57 47 99 0 0 51 40 36 18 7 26 7 83 -51 51 35 30 51 45 42 51 16 40 52 4 36 100 0 0 51 47 7 18 7 27 8 84 -51 51 42 1 51 52 12 51 23 13 52 11 5 101 0 0 51 53 16 18 7 27 8 85 -50 51 48 11 51 58 21 51 29 24 52 17 12 102 0 0 51 59 4 18 7 28 9 85 -50 51 54 0 52 4 9 51 35 15 52 22 58 103 0 0 52 4 32 18 7 28 10 86 -49 51 59 27 52 9 36 51 40 44 52 28 24 104 0 0 52 9 38 18 7 29 10 87 -49 52 4 34 52 14 42 51 45 52 52 33 28 105 0 0 52 14 23 18 7 29 11 88 -49 52 9 20 52 19 27 51 50 39 52 38 12 106 0 0 52 18 48 18 7 30 11 89 -48 52 13 45 52 23 51 51 55 6 52 42 35 107 0 0 52 22 52 18 7 30 12 89 -48 52 17 50 52 27 55 51 59 11 52 46 38 108 0 0 52 26 36 18 7 31 13 90 -48 52 21 33 52 31 38 52 2 56 52 50 20 109 0 0 52 29 59 18 7 32 13 91 -47 52 24 57 52 35 1 52 6 20 52 53 41 110 0 0 52 33 1 18 7 32 14 92 -47 52 27 59 52 38 3 52 9 24 52 56 43 111 0 0 52 35 43 18 7 33 14 93 -46 52 30 42 52 40 45 52 12 7 52 59 24 112 0 0 52 38 5 18 7 34 15 93 -46 52 33 3 52 43 6 52 14 30 53 1 44 113 0 0 52 40 6 18 7 35 16 94 -45 52 35 5 52 45 8 52 16 32 53 3 45 114 0 0 52 41 47 18 7 35 16 95 -45 52 36 46 52 46 48 52 18 13 53 5 25 115 0 0 52 43 8 18 7 36 17 96 -45 52 38 7 52 48 9 52 19 34 53 6 45 116 0 0 52 44 8 18 7 37 18 97 -44 52 39 7 52 49 9 52 20 35 53 7 45 117 0 0 52 44 48 18 7 38 18 98 -44 52 39 47 52 49 49 52 21 16 53 8 25 118 0 0 52 45 8 18 7 39 19 98 -43 52 40 7 52 50 9 52 21 36 53 8 45 119 0 0 52 45 8 18 7 40 19 99 -43 52 40 7 52 50 9 52 21 35 53 8 44 120 0 0 52 44 47 18 7 41 20 100 -42 52 39 46 52 49 48 52 21 15 53 8 24 121 0 0 52 44 6 18 7 42 21 101 -42 52 39 5 52 49 7 52 20 34 53 7 43 122 0 0 52 43 5 18 7 43 21 102 -41 52 38 4 52 48 6 52 19 32 53 6 42 123 0 0 52 41 43 18 7 44 22 103 -41 52 36 42 52 46 45 52 18 10 53 5 21 124 0 0 52 40 2 18 7 45 22 103 -40 52 35 0 52 45 3 52 16 28 53 3 40 125 0 0 52 37 59 18 7 47 23 104 -40 52 32 58 52 43 1 52 14 25 53 1 38 126 0 0 52 35 37 18 7 48 24 105 -39 52 30 35 52 40 38 52 12 1 52 59 16 127 0 0 52 32 53 18 7 49 24 106 -39 52 27 52 52 37 55 52 9 17 52 56 34 128 0 0 52 29 50 18 7 50 25 107 -38 52 24 48 52 34 52 52 6 12 52 53 31 129 0 0 52 26 25 18 7 51 25 108 -38 52 21 23 52 31 28 52 2 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0 0 1 23 58 18 14 58 19 280 74 1 18 38 1 29 18 0 58 55 1 49 5 -100 0 0 1 3 36 18 15 0 18 280 74 0 58 16 1 8 55 0 38 37 1 28 39 - 99 0 0 0 43 45 18 15 2 17 280 75 0 38 27 0 49 4 0 18 51 1 8 45 - 98 0 0 0 24 27 18 15 3 16 280 75 0 19 10 0 29 45 - 0 0 23 0 49 23 - 97 0 0 0 5 42 18 15 5 15 280 75 0 0 25 0 10 59 - 0 19 5 0 30 33 - 96 0 0 - 0 12 32 18 15 6 14 280 76 - 0 17 47 - 0 7 15 - 0 37 14 0 12 16 - 95 0 0 - 0 30 12 18 15 7 13 280 76 - 0 35 27 - 0 24 57 - 0 54 51 - 0 5 28 - 94 0 0 - 0 47 20 18 15 8 12 280 76 - 0 52 35 - 0 42 6 - 1 11 56 - 0 22 40 - 93 0 0 - 1 3 56 18 15 9 11 280 76 - 1 9 9 - 0 58 42 - 1 28 28 - 0 39 19 - 92 0 0 - 1 19 58 18 15 10 10 280 76 - 1 25 11 - 1 14 45 - 1 44 27 - 0 55 25 - 91 0 0 - 1 35 28 18 15 11 9 280 75 - 1 40 40 - 1 30 15 - 1 59 53 - 1 10 57 - 90 0 0 - 1 50 24 18 15 11 8 280 75 - 1 55 36 - 1 45 12 - 2 14 46 - 1 25 57 - 89 0 0 - 2 4 48 18 15 12 7 280 75 - 2 9 58 - 1 59 36 - 2 29 7 - 1 40 24 - 88 0 0 - 2 18 38 18 15 13 6 280 74 - 2 23 48 - 2 13 27 - 2 42 54 - 1 54 17 - 87 0 0 - 2 31 55 18 15 13 5 280 74 - 2 37 5 - 2 26 45 - 2 56 8 - 2 7 37 - 86 0 0 - 2 44 39 18 15 13 4 280 73 - 2 49 48 - 2 39 30 .. .. .. - 2 20 24 - 85 0 0 - 2 56 50 18 15 14 3 280 73 - 3 1 59 - 2 51 42 .. .. .. - 2 32 38 - 84 0 0 - 3 8 28 18 15 14 2 280 72 - 3 13 36 - 3 3 20 .. .. .. - 2 44 18 - 83 0 0 - 3 19 33 18 15 14 0 280 72 - 3 24 40 - 3 14 25 .. .. .. - 2 55 25 Data for the target star ------------------------ * name: TYC 0820-00182-1 * constellation : Leo * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 09 29 42.9694 DE: +09 55 37.612 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .023, .018 ) * V mag [mag]: 9.4 * B mag [mag]: 10.9 * Apparent position with proper motion RA(deg): 142.5350921270 DE(deg): 9.8941594167 * Equation of equinoxes (radians) : 0.000028647194033 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (647) Adelgunde approx. diameter [km]: 17 approx. diameter ["]: .012 distance from Earth [AU]: 2.03100 * orbital information: orbit source: Preston date of fit: 2007 Sep 25 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 750 number of rejected observations: 46 time covered by the observations: 1907 Sep 11 - 2007 Jan 09 1 sigma uncertainty ellipse (major, minor, PA): 0.021, 0.011, 112° remarks: * orbital elements for (647) Adelgunde : Mean anomaly = 29.21843484 deg Arg. of pericenter = 175.82434649 deg Long. of node = 254.87931364 deg Inclination = 7.32900928 deg Eccentricity = 0.19493826 Semimajor axis = 2.44152655 AU Perihelion dist = 1.96557962 AU Mag: H = 11.07, G = 0.15 Epoch of elements : MJD 54405.75800000 TDT (2007 Nov 01.758) ------ occelmnt file for Occult BEGIN ----------------------------------- 2007 Nov 01 647 Adelgunde 18h 11.3m UT 9.4 9 29 42.969 9 55 37.61TYC 0820-00182-1 10.9 15.7 17 0.7 2.031 3.652 -27.70 -171.051 9.935 -96.92 -14.48 18.1886 .18451 .35762 12.46364 -6.39687 -0.00505 0.00158 2000 27.730843920071027.00000175.824346254.879314 7.3290090.194938262.441526551.9655796211.45 0.15 RATE 2.5835204 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000 Meas 0.031 0.021 100.2 2.850 0.022 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2007 Sep 26, 15:34 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org