+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   180464 (2004 CZ21) Classification: Main-belt Asteroid          SPK-ID: 2180464 [ 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 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1273926130379863 5.3682e-08   a 2.329174070228913 1.1488e-08 au q 2.03245449920213 1.2741e-07 au i 7.314472873273158 4.7964e-06 deg node 158.6197155894979 3.5562e-05 deg peri 225.3248079012251 3.8684e-05 deg M 11.92494853748427 1.364e-05 deg tp 2459157.491394675383 (2020-Nov-03.99139468) 4.9239e-05 TDB period 1298.378594104067 3.55 9.606e-06 2.63e-08 d yr n .2772688964796238 2.0514e-09 deg/d Q 2.625893641255697 1.2952e-08 au   Orbit Determination Parameters    # obs. used (total)      410      data-arc span      9265 days (25.37 yr)      first obs. used      1995-09-01      last obs. used      2021-01-12      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .54137      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 21:26:37   Additional Information  Earth MOID = 1.04082 au   Jupiter MOID = 2.84238 au   T_jup = 3.550  [ 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 16.95   n/a E2021B55   180464 (2004 CZ21)          Discovered 2004-Feb-11 by NEAT at Palomar Reference: 20080321/Numbers.arc Last Updated: 2008-03-26 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-23 18:33 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin