+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   100230 (1994 PN18) Classification: Main-belt Asteroid          SPK-ID: 2100230 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 14 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2019718939415489 5.0061e-08   a 3.092702671256292 1.8296e-08 au q 2.468063655344571 1.575e-07 au i 1.154528981774985 4.1934e-06 deg node 300.6863057117422 0.00028185 deg peri 75.58142952186282 0.00028203 deg M 278.7629724129381 1.2221e-05 deg tp 2459648.788094072702 (2022-Mar-10.28809407) 7.0068e-05 TDB period 1986.578271751973 5.44 1.7629e-05 4.827e-08 d yr n .1812161167365 1.6081e-09 deg/d Q 3.717341687168012 2.1992e-08 au   Orbit Determination Parameters    # obs. used (total)      463      data-arc span      9468 days (25.92 yr)      first obs. used      1994-08-12      last obs. used      2020-07-14      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .59636      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 20:07:19   Additional Information  Earth MOID = 1.46845 au   Jupiter MOID = 1.75641 au   T_jup = 3.192  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.44   n/a E2021B55   diameter diameter 4.233 km 1.191 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.068   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   100230 (1994 PN18)          Discovered 1994-Aug-12 by Elst, E. W. at La Silla Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  1994 PN18 = 2000 UR47  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-08 13:36 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin