+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   190058 (2004 RS257) Classification: Main-belt Asteroid          SPK-ID: 2190058 [ 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 17 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1851459722808441 4.9166e-08   a 2.66667824949555 1.8165e-08 au q 2.172953512232517 1.3377e-07 au i 9.856686630809351 6.9753e-06 deg node 195.2042054298419 2.3855e-05 deg peri 233.4596860569601 2.9021e-05 deg M 217.9645999892663 1.8281e-05 deg tp 2459828.050171767458 (2022-Sep-05.55017177) 8.4691e-05 TDB period 1590.575742520611 4.35 1.6252e-05 4.45e-08 d yr n .2263331386089807 2.3127e-09 deg/d Q 3.160402986758583 2.1529e-08 au   Orbit Determination Parameters    # obs. used (total)      315      data-arc span      7173 days (19.64 yr)      first obs. used      2000-10-31      last obs. used      2020-06-21      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .61274      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 22:06:03   Additional Information  Earth MOID = 1.20174 au   Jupiter MOID = 2.23151 au   T_jup = 3.337  [ 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 16.39   n/a E2021B55   190058 (2004 RS257)          Discovered 2004-Sep-09 by LONEOS at Anderson Mesa Reference: 20080819/Numbers.arc Last Updated: 2008-08-25 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-23 04:24 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin