+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   21385 (1998 FV8) Classification: Main-belt Asteroid          SPK-ID: 2021385 [ 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 25 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .161703716114795 3.7167e-08   a 2.3990217565256 1.107e-08 au q 2.011091023455168 9.2629e-08 au i 2.383461713998637 3.9445e-06 deg node 81.74231520234022 0.00010961 deg peri 185.1489842149232 0.00011096 deg M 347.3964796674064 2.1212e-05 deg tp 2459248.015912323322 (2021-Feb-02.51591232) 8.0172e-05 TDB period 1357.21829972847 3.72 9.3945e-06 2.572e-08 d yr n .2652484129281361 1.836e-09 deg/d Q 2.786952489596032 1.2861e-08 au   Orbit Determination Parameters    # obs. used (total)      1101      data-arc span      10540 days (28.86 yr)      first obs. used      1991-07-13      last obs. used      2020-05-21      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .55757      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 01:57:19   Additional Information  Earth MOID = .993387 au   Jupiter MOID = 2.29293 au   T_jup = 3.508  [ 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 15.53   n/a E2021B10   diameter diameter 1.910 km 0.327 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.232   0.069 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   21385 (1998 FV8)          Discovered 1998-Mar-22 by Spacewatch at Kitt Peak Reference: 20010208/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1998 FV8 = 1991 NF9 = 1994 CG20  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-10 19:40 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin