+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   4216 Neunkirchen (1988 AF5) Classification: Main-belt Asteroid          SPK-ID: 2004216 [ 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 40 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1700323039837004 2.7827e-08   a 2.357252435615214 6.9257e-09 au q 1.956443372916369 6.5718e-08 au i 4.456298489129541 3.2168e-06 deg node 202.5645524107205 3.946e-05 deg peri 49.62640349861504 4.0538e-05 deg M 279.8825218656842 9.345e-06 deg tp 2459494.693000926881 (2021-Oct-07.19300093) 3.4722e-05 TDB period 1321.927284781996 3.62 5.8258e-06 1.595e-08 d yr n .2723296539411159 1.2002e-09 deg/d Q 2.758061498314058 8.1033e-09 au   Orbit Determination Parameters    # obs. used (total)      2288      data-arc span      17163 days (46.99 yr)      first obs. used      1974-03-22      last obs. used      2021-03-18      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .48084      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 16:04:35   Additional Information  Earth MOID = .944269 au   Jupiter MOID = 2.28068 au   T_jup = 3.530  [ 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 14.07   n/a E2020-QM5   diameter diameter 2.366 km 0.325 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.601   0.122 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   4216 Neunkirchen (1988 AF5)          Discovered 1988-Jan-14 by Debehogne, H. at La Silla Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1988 AF5 = 1974 FC = 1978 LK = 1985 JS = 1986 UO2  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-14 06:29 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin