+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   127 Johanna Classification: Main-belt Asteroid          SPK-ID: 2000127 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: JPL 70 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06571531770558152 5.7653e-08   a 2.755840495151306 1.2042e-08 AU q 2.574739561466531 1.6002e-07 AU i 8.24018987509965 6.8571e-06 deg node 31.2071807771787 4.5152e-05 deg peri 94.80390254993551 6.9173e-05 deg M 169.0066938565485 5.1063e-05 deg tp 2455616.021675313582 (2011-Feb-23.52167531) 0.00023707 JED period 1671.011901616273 4.57 1.0953e-05 2.999e-08 d yr n .2154383219244536 1.4121e-09 deg/d Q 2.936941428836082 1.2834e-08 AU   Orbit Determination Parameters    # obs. used (total)      1116      data-arc span      34890 days (95.52 yr)      first obs. used      1917-10-03      last obs. used      2013-04-12      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .59818      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 12:32:32   Additional Information  Earth MOID = 1.60562 AU   T_jup = 3.325  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 8.3 mag n/a PDS3 (MPC 17257)   diameter diameter 122 km n/a J.G. Williams (E-mail September 1990) based on assumed albedo of 0.048 for C-type rotation period rot_per 12.7988 h n/a Asteroid Lightcurve DataBase (Rev. 2013-May-01) Published Reference List: [Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] Tholen spectral type spec_T CX   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices SMASSII spectral type spec_B Ch   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002) 127 Johanna          Discovered 1872-Nov-05 by Henry, Prosper at Paris In their cooperative program it will probably never be known which of the Henry brothers discovered which planet. With strict impartiality, these discoveries were announced as having been made alternatively by Prosper and by Paul. Note: "planet" implies "minor planet" Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-20 03:22 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin