+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   11819 Millarca (1981 ER35) Classification: Main-belt Asteroid          SPK-ID: 2011819 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1047175866252152 4.0139e-08   a 3.006319465165273 1.7009e-08 au q 2.691504946148759 1.2224e-07 au i 8.085867424223453 3.8677e-06 deg node 289.8556913890194 3.3657e-05 deg peri 109.4663777150095 4.2126e-05 deg M 359.017317441426 2.2621e-05 deg tp 2459205.697109499861 (2020-Dec-22.19710950) 0.00011962 TDB period 1903.930627063299 5.21 1.6158e-05 4.424e-08 d yr n .1890825195428883 1.6047e-09 deg/d Q 3.321133984181789 1.8791e-08 au   Orbit Determination Parameters    # obs. used (total)      1139      data-arc span      15005 days (41.08 yr)      first obs. used      1979-12-20      last obs. used      2021-01-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .49557      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 02:02:39   Additional Information  Earth MOID = 1.7125 au   Jupiter MOID = 2.07226 au   T_jup = 3.228  [ 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 14.60   n/a E2021B10   11819 Millarca           Discovered 1981 Mar. 2 by S. J. Bus at Siding Spring. Millarca Valenzuela (b. 1977) is a geologist at the Pontificia Universidad Catolica de Chile, and a specialist in meteorites, undertaking many search expeditions in the Atacama Desert. 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 2017-03-12 Last Updated: 2017-04-19 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Mar-08 00:59 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin