IOTA/IOTA-ES occultation update for (1069) Planckia / TYC 0748-01668-1 event on 2009 Dec 02, 13:14 UT Visible from Summary ------- On 2009 Dec 02 UT, the 40 km diameter asteroid (1069) Planckia will occult a 9.5 mag star in the constellation Monoceros for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.6 mag to 14.1 mag (the magnitude of the asteroid) for at most 5.0 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: 58 * date and approx. time of event: 2009 Dec 02, 13:03 - 2009 Dec 02, 13:27 UT * magnitude of target star: 9.5 * magnitude drop [mag]: 4.6 * estimated maximum duration [s]: 5.0 * Moon: 100 % sunlit, 36° distance * Sun: 142° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 41 * 1 sigma uncertainty interval [path widths]: +/- 1.08 * 1 sigma uncertainty interval [seconds]: +/- 7.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .036 +/- .027) * 1 sigma uncertainty ellipse (major, minor, PA): ( .036", .027", 87° ) * approx speed of asteroid's shadow [km/s]: 7.9606 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0748-01668-1 by 1069 Planckia on 2009 Dec 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 101 0 0 11 19 35 13 27 41 1 81 -37 11 30 45 11 8 25 11 54 53 10 44 20 102 0 0 11 28 37 13 27 41 2 82 -38 11 39 47 11 17 27 12 3 55 10 53 22 103 0 0 11 37 37 13 27 40 3 82 -39 11 48 47 11 26 28 12 12 56 11 2 23 104 0 0 11 46 36 13 27 39 4 82 -40 11 57 46 11 35 27 12 21 55 11 11 22 105 0 0 11 55 34 13 27 38 5 82 -41 12 6 44 11 44 25 12 30 52 11 20 20 106 0 0 12 4 30 13 27 37 6 82 -42 12 15 40 11 53 21 12 39 48 11 29 16 107 0 0 12 13 24 13 27 35 7 83 -43 12 24 34 12 2 15 12 48 42 11 38 10 108 0 0 12 22 16 13 27 34 8 83 -44 12 33 26 12 11 7 12 57 34 11 47 3 109 0 0 12 31 6 13 27 32 9 83 -45 12 42 16 12 19 57 13 6 24 11 55 53 110 0 0 12 39 54 13 27 29 10 83 -46 12 51 4 12 28 45 13 15 11 12 4 41 111 0 0 12 48 39 13 27 27 11 84 -47 12 59 49 12 37 30 13 23 57 12 13 26 112 0 0 12 57 22 13 27 24 12 84 -48 13 8 31 12 46 13 13 32 39 12 22 9 113 0 0 13 6 2 13 27 21 13 84 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35 270 -3 15 52 55 15 30 40 16 16 59 15 6 40 -105 0 0 15 34 29 13 3 47 34 270 -3 15 45 37 15 23 21 16 9 40 14 59 21 -104 0 0 15 27 5 13 3 40 33 270 -2 15 38 13 15 15 57 16 2 17 14 51 57 -103 0 0 15 19 36 13 3 32 32 271 -1 15 30 44 15 8 28 15 54 48 14 44 28 Uncertainty in time = +/- 7 secs [Prediction of 2008 Apr 25.0] Data for the target star ------------------------ * name: TYC 0748-01668-1 * constellation : Monoceros * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 07 00 46.0221 DE: +08 32 02.670 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .020, .023 ) * V mag [mag]: 9.5 * B mag [mag]: 9.6 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1069) Planckia approx. diameter [km]: 40 approx. diameter ["]: .025 distance from Earth [AU]: 2.20400 * orbital information: orbit source: Preston date of fit: 2008 Apr 25 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 902 number of rejected observations: 79 time covered by the observations: 1927 Jan 28 - 2007 Nov 29 1 sigma uncertainty ellipse (major, minor, PA): 0.030, 0.014, 85° remarks: * orbital elements for (1069) Planckia : Mean anomaly = 290.11622116 deg Arg. of pericenter = 33.44491781 deg Long. of node = 142.45212184 deg Inclination = 13.56873210 deg Eccentricity = 0.10918388 Semimajor axis = 3.12803760 AU Perihelion dist = 2.78650631 AU Mag: H = 9.33, G = 0.15 Epoch of elements : MJD 55167.55200000 TDT (2009 Dec 02.552) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Dec 2 1069 Planckia 13h 14.6m UT 9.5 7 0 46.022 8 32 2.67TYC 0748-01668-1 9.6 14.1 40 5.0 2.204 -1.210 0.10 -164.9658 8.534 -21.26 -22.02 13.2428 0.00161 0.19027 -4.49312 0.02228 -0.00328 0.00154 2000 288.77080020091125.00000 33.444918142.452122 13.5687320.10918388 3.1280376 2.7865063 9.3 5.00.15 RATE 1.7815430 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.036 0.027 87 2.08 0.027 0 54581.5020091202_1668-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Apr 25, 09:55 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org