+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   27413 Ambruster (2000 EW138) Classification: Main-belt Asteroid          SPK-ID: 2027413 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1144283713796816 3.1546e-08   a 2.296752150578127 7.756e-09 au q 2.033938542524691 7.3863e-08 au i 12.04692126435576 3.3091e-06 deg node 90.94981093769989 1.8812e-05 deg peri 346.807790761231 2.6387e-05 deg M 24.63403120564971 1.7495e-05 deg tp 2458913.503333687821 (2020-Mar-05.00333369) 6.1779e-05 TDB period 1271.36316467772 3.48 6.44e-06 1.763e-08 d yr n .2831606341931866 1.4343e-09 deg/d Q 2.559565758631563 8.6435e-09 au   Orbit Determination Parameters    # obs. used (total)      1612      data-arc span      8364 days (22.90 yr)      first obs. used      1997-06-01      last obs. used      2020-04-25      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .48267      source      ORB      producer      Otto Matic      solution date      2020-May-20 06:10:45   Additional Information  Earth MOID = 1.05137 au   Jupiter MOID = 2.66008 au   T_jup = 3.556  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.5   n/a MPO395270   diameter diameter 1.981 km 0.197 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.858   0.044 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   27413 Ambruster           Discovered 2000 Mar. 11 by the Catalina Sky Survey. Carol Ambruster (1943-2013) did pioneering research on magnetic activity and flares of cool stars. She led Chaco Canyon work providing evidence for an early Navajo sun-watching tradition. Carol was the epitome of a perspicuous observer, with consummate interests also in music, art and history, and the natural world. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: MPC batch dated 2014-04-15 Last Updated: 2014-04-17 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Aug-15 21:15 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin