+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   11836 Eileen (1986 CB) Classification: Mars-crossing Asteroid          SPK-ID: 2011836 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3501782400882426 1.288e-08   a 2.346321677254395 7.7042e-09 au q 1.524690881632558 3.2064e-08 au i 22.48576399752947 5.3786e-07 deg node 131.6772206735386 2.0867e-06 deg peri 289.873679256732 2.877e-06 deg M 352.1122041313495 3.8637e-06 deg tp 2459425.262916360763 (2021-Jul-29.76291636) 1.4191e-05 TDB period 1312.743136650949 3.59 6.4656e-06 1.77e-08 d yr n .2742349130984046 1.3507e-09 deg/d Q 3.167952472876233 1.0402e-08 au   Orbit Determination Parameters    # obs. used (total)      1599      data-arc span      12642 days (34.61 yr)      first obs. used      1986-02-05      last obs. used      2020-09-16      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .46407      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 22:58:51   Additional Information  Earth MOID = .671064 au   Jupiter MOID = 2.47523 au   T_jup = 3.380  [ 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 13.69   n/a E2021B10   rotation period rot_per 8.810 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Higgins, D.J. (2011) http://www.david-higgins.com/Astronomy/asteroid/lightcurves.htm] 11836 Eileen           Discovered 1986 Feb. 5 by C. S. Shoemaker and E. M. Shoemaker at Palomar. Eileen Collins (b. 1956), astronaut, became in Feb. 1995 the first woman to pilot a shuttle mission. In July 1999 she became NASA's first female shuttle commander. Her five-day mission launched the Chandra X-ray Telescope into orbit. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20020427/MPCPages.arc Last Updated: 2003-10-02 Alternate Designations  1986 CB = 1988 PJ  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jul-25 13:56 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin