+ 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 2459000.5 (2020-May-31.0) TDB Reference: JPL 25 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3508225552437533 4.4624e-08   a 2.347689802007316 7.8525e-09 au q 1.524067266747408 1.0586e-07 au i 22.47656150570694 3.5623e-06 deg node 131.6861837167454 1.4298e-05 deg peri 289.7930400389401 1.4878e-05 deg M 243.71017265023 5.6446e-06 deg tp 2459424.922815503264 (2021-Jul-29.42281550) 2.1481e-05 TDB period 1313.891481854343 3.60 6.592e-06 1.805e-08 d yr n .2739952309394067 1.3747e-09 deg/d Q 3.171312337267224 1.0607e-08 au   Orbit Determination Parameters    # obs. used (total)      1531      data-arc span      12601 days (34.50 yr)      first obs. used      1986-02-05      last obs. used      2020-08-06      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .46219      source      ORB      producer      Otto Matic      solution date      2020-Aug-25 00:28:14   Additional Information  Earth MOID = .67066 au   Jupiter MOID = 2.47285 au   T_jup = 3.379  [ 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 13.7   n/a MPO435812   rotation period rot_per 8.810 h n/a LCDB (Rev. 2019-August); 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 ] 2020-Oct-19 22:45 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin