+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   21495 Feaga (1998 JP2) Classification: Main-belt Asteroid          SPK-ID: 2021495 [ 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 35 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1681364295977027 3.2342e-08   a 2.269957804034401 6.3086e-09 au q 1.888295203526615 7.2688e-08 au i 8.872767099928009 3.1339e-06 deg node 93.05016395897138 2.3702e-05 deg peri 215.6345389518137 2.5612e-05 deg M 157.527510378289 1.0034e-05 deg tp 2458653.888188741726 (2019-Jun-19.38818874) 3.4551e-05 TDB period 1249.180232585582 3.42 5.2075e-06 1.426e-08 d yr n .2881889983600396 1.2014e-09 deg/d Q 2.651620404542187 7.3693e-09 au   Orbit Determination Parameters    # obs. used (total)      1893      data-arc span      25844 days (70.76 yr)      first obs. used      1950-04-20      last obs. used      2021-01-21      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .49002      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 02:52:52   Additional Information  Earth MOID = .878849 au   Jupiter MOID = 2.59042 au   T_jup = 3.579  [ 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 14.53   n/a E2020-QM5   diameter diameter 3.588 km 0.139 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.261   0.056 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   21495 Feaga           Discovered 1998 May 1 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station. Lori Michele (Lanier) Feaga (b. 1975) is a spectroscopist from the ultraviolet to the infrared. She has studied planetary satellites, including the discovery of chlorine in the atmosphere of Jupiter I (Io); and comets, most notably demonstrating the chemical heterogeneity in the natural outgassing by comet 9P/Tempel. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20080718/MPCPages.arc Last Updated: 2008-07-18 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-11 04:17 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin