IOTA/IOTA-ES occultation update for (20810) 2000 SE266 / TYC 1292-00004-1 event on 2009 Nov 02, 17:27 UT Visible from Summary ------- On 2009 Nov 02 UT, the 12 km diameter asteroid (20810) 2000 SE266 will occult a 9.2 mag star in the constellation Taurus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.5 mag to 15.7 mag (the magnitude of the asteroid) for at most 2.2 seconds. This update is based on historical astrometry from the MPC files (via AstDys), and the following catalogs for the star position: UCAC. The event at a glimpse ---------------------- * Rank: 7 * date and approx. time of event: 2009 Nov 02, 17:11 - 2009 Nov 02, 17:46 UT * magnitude of target star: 9.2 * magnitude drop [mag]: 6.5 * estimated maximum duration [s]: 2.2 * Moon: 100 % sunlit, 36° distance * Sun: 145° distance * rough path description: Additional comments ------------------- 14" double star The occultation path -------------------- * approximate projected width [km]: 12 * 1 sigma uncertainty interval [path widths]: +/- 9.93 * 1 sigma uncertainty interval [seconds]: +/- 20.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .145 +/- .092) * 1 sigma uncertainty ellipse (major, minor, PA): ( .149", .085", 74° ) * approx speed of asteroid's shadow [km/s]: 5.4468 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1292-00004-1 by 20810 2000 SE266 on 2009 Nov 2 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 17 0 0 38 5 5 17 46 37 0 62 -23 38 8 49 38 1 21 39 23 17 .. .. .. 18 0 0 38 29 58 17 46 37 1 63 -24 38 33 42 38 26 15 39 47 51 .. .. .. 19 0 0 38 54 15 17 46 36 2 63 -25 38 57 57 38 50 32 40 11 49 .. .. .. 20 0 0 39 17 55 17 46 35 3 64 -25 39 21 37 39 14 13 40 35 10 .. .. .. 21 0 0 39 40 59 17 46 34 4 65 -26 39 44 40 39 37 18 40 57 56 38 24 24 22 0 0 40 3 27 17 46 33 4 65 -27 40 7 7 39 59 47 41 20 6 38 47 10 23 0 0 40 25 20 17 46 32 5 66 -28 40 28 59 40 21 41 41 41 41 39 9 21 24 0 0 40 46 38 17 46 30 6 66 -28 40 50 16 40 42 59 42 2 41 39 30 56 25 0 0 41 7 21 17 46 28 7 67 -29 41 10 58 41 3 44 42 23 7 39 51 57 26 0 0 41 27 30 17 46 26 8 68 -30 41 31 7 41 23 53 42 42 59 40 12 22 27 0 0 41 47 5 17 46 23 9 68 -30 41 50 41 41 43 29 43 2 18 40 32 14 28 0 0 42 6 7 17 46 21 9 69 -31 42 9 42 42 2 32 43 21 3 40 51 32 29 0 0 42 24 36 17 46 18 10 70 -32 42 28 10 42 21 2 43 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39 48 -173 0 0 1 22 53 17 12 0 34 296 -1 1 26 49 1 18 57 2 45 8 0 1 3 -172 0 0 0 44 13 17 11 47 33 296 0 0 48 9 0 40 18 2 6 18 - 0 37 27 Uncertainty in time = +/- 27 secs [Prediction of 2008 Apr 25.0] Data for the target star ------------------------ * name: TYC 1292-00004-1 * constellation : Taurus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 04 54 26.0118 DE: +21 44 59.977 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .016, .015 ) * V mag [mag]: 9.2 * B mag [mag]: 9.6 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (20810) 2000 SE266 approx. diameter [km]: 12 approx. diameter ["]: .012 distance from Earth [AU]: 1.35100 * orbital information: orbit source: Preston date of fit: 2008 Apr 25 source of used astrometry: MPC (via Astdys) number of used observations: 499 number of rejected observations: 7 time covered by the observations: 1965 Nov 01 - 2007 Aug 09 1 sigma uncertainty ellipse (major, minor, PA): 0.148, 0.084, 74° remarks: * orbital elements for (20810) 2000 SE266 : Mean anomaly = 358.81862020 deg Arg. of pericenter = 358.43637731 deg Long. of node = 63.46143534 deg Inclination = 8.91662678 deg Eccentricity = 0.16265753 Semimajor axis = 2.67530310 AU Perihelion dist = 2.24014492 AU Mag: H = 13.19, G = 0.15 Epoch of elements : MJD 55137.72700000 TDT (2009 Nov 02.727) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Nov 2 20810 2000 SE266 17h 27.6m UT 9.2 4 54 26.012 21 44 59.98TYC 1292-00004-1 9.7 15.7 12 2.2 1.351 -1.258 9.69 129.5970 21.748 -85.99 -14.95 17.4595 0.10443 0.18728 -2.68957 1.48915 -0.00313 -0.00029 2000 357.07819420091026.00000358.436377 63.461435 8.9166270.16265753 2.6753031 2.240144912.5 5.00.15 RATE 2.2523950 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.149 0.085 74 10.93 0.122 0 54581.5020091102_0004-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Apr 25, 09:23 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org