+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   4161 Amasis (6627 P-L) Classification: Main-belt Asteroid          SPK-ID: 2004161 [ 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 34 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09274286867760992 3.2719e-08   a 3.069312687236673 1.4532e-08 au q 2.78465582375376 1.0217e-07 au i 3.266062204727193 4.2885e-06 deg node 172.4287489517228 5.8986e-05 deg peri 229.0831632786837 6.3759e-05 deg M 39.69353056072319 2.242e-05 deg tp 2458983.940441616695 (2020-May-14.44044162) 0.00012252 TDB period 1964.084320963198 5.38 1.3949e-05 3.819e-08 d yr n .1832915196957807 1.3017e-09 deg/d Q 3.353969550719586 1.588e-08 au   Orbit Determination Parameters    # obs. used (total)      2219      data-arc span      22086 days (60.47 yr)      first obs. used      1960-09-24      last obs. used      2021-03-14      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .47704      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 16:01:10   Additional Information  Earth MOID = 1.79314 au   Jupiter MOID = 2.01915 au   T_jup = 3.222  [ 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 13.35   n/a E2021B10   diameter diameter 16.074 km 0.040 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.024   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   4161 Amasis (6627 P-L)          Discovered 1960-Sep-24 by van Houten and Gehrels at Palomar Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  6627 P-L = 1982 VF3  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-16 01:12 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin