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JPL Small-Body Database Browser Page 1 of 2 + View the NASA Portal Search JPL + Near-Earth Object (NEO) Project Search: [ help ] JPL Small-Body Database Browser 145523 Lulin (2006 EM67) Classification: Main-belt Asteroid SPK-ID: 2145523 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ hide orbit diagram ] Orbit Diagram Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using 2-body methods, and hence should not be used for determining accurate long- term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system. Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane. Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL). Orbital Elements at Epoch 2455400.5 (2010-Jul-23.0) TDB Reference: MPO147121 (heliocentric ecliptic J2000) Orbit Determination Parameters Element Value Uncertainty (1-sigma) Units # obs. used (total) 94 e 0.1845118 n/a first obs. used 1992-??-?? a 2.7468718 n/a AU http://ssd.jpl.nasa.gov/sbdb.cgi?ID=a0145523;orb=1;cov=0;log=0;cad=0 2010/10/29 JPL Small-Body Database Browser Page 2 of 2 q 2.2400415 n/a AU last obs. used 2007-10-15 i 10.85340 n/a deg # oppositions 7 node 345.61165 n/a deg planetary ephem. DE403 peri 271.42951 n/a deg condition code 0 M 302.39467 n/a deg fit RMS 0.52 2455666.5824204 data source MPC:mpu t n/a JED p (2011-Apr-15.08242040) producer MPCW 1662.8612549 n/a d period 4.55 n/a yr Additional Information n 0.21649431 n/a deg/d T_jup = 3.297 Q 3.2537021 n/a AU [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.5 mag n/a MPO147121 145523 Lulin Discovered 2006 Mar. 7 by H.-C. Lin and Q.-z. Ye at Lulin Observatory. Lulin, the mountain located in central Taiwan where this minor planet was discovered, literally means "Samba Woods". At an altitude of 2862 meters Lulin Observatory hosts telescopes for optical astronomical observations, as well as instruments for atmospheric, geoscience and space-science studies. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20070402/MPCPages.arc Last Updated: 2007-07-05 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2010-Oct-29 02:37 UT Site Manager: Donald K. Yeomans (server date/time) Webmaster: Alan B. Chamberlin http://ssd.jpl.nasa.gov/sbdb.cgi?ID=a0145523;orb=1;cov=0;log=0;cad=0 2010/10/29.

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MS V6 with Figures
Grism Spectroscopy of Comet Lulin Swift UVOT Grism Spectroscopy of Comets: A First Application to C/2007 N3 (Lulin) D. Bodewits1,2, G. L. Villanueva2,3, M. J. Mumma2, W. B. Landsman4, J. A. Carter5, and A. M. Read5 Submitted to the Astronomical Journal on 16th February, 2010 Revised version October 21st, 2010 1 NASA Postdoctoral Fellow, [email protected] 2 NASA Goddard Space Flight Center, Solar System Exploration Division, Mailstop 690.3, Greenbelt, MD 20771, USA 3 Dept. of Physics, Catholic University of America, Washington DC 20064, USA 4 NASA Goddard Space Flight Center, Astrophysics Science Division, Mailstop 667, Greenbelt, MD 20771, USA 5 Dept. of Physics and Astronomy, Leicester University, Leicester LE1 7RH, UK 8 figures, 4 tables Key words: Comets: Individual (C/2007 N3 (Lulin)) – Methods: Data Analysis – Techniques: Image Spectroscopy – Ultraviolet: planetary systems Abstract We observed comet C/2007 N3 (Lulin) twice on UT 28 January 2009, using the UV grism of the Ultraviolet and Optical Telescope (UVOT) on board the Swift Gamma Ray Burst space observatory. Grism spectroscopy provides spatially resolved spectroscopy over large apertures for faint objects. We developed a novel methodology to analyze grism observations of comets, and applied a Haser comet model to extract production rates of OH, CS, NH, CN, C3, C2, and dust. The water production rates retrieved from two visits on this date were 6.7 ± 0.7 and 7.9 ± 0.7 x 1028 molecules s-1, respectively. Jets were sought (but not found) in the white-light and ‘OH’ images reported here, suggesting that the jets reported by Knight and Schleicher (2009) are unique to CN.
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