+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   154590 (2003 MA3) Classification: Apollo [NEO, PHA]          SPK-ID: 2154590 [ 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 39 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .4021227862206004 6.3096e-08   a 1.105177399572872 7.1385e-09 au q .6607603843885912 6.97e-08 au i 1.415691461466269 3.9579e-06 deg node 152.6716198934753 0.00027313 deg peri 228.8525733214226 0.00027207 deg M 309.3699341856335 1.6409e-05 deg tp 2459260.183242658282 (2021-Feb-14.68324266) 1.9839e-05 TDB period 424.371705060764 1.16 4.1116e-06 1.126e-08 d yr n .8483129193272984 8.219e-09 deg/d Q 1.549594414757154 1.0009e-08 au Additional Model Parameters  Parameter Value Uncertainty (1-sigma)  A2 [EST] -7.471465619274135E-14 1.561E-14 ALN [SET] 1. n/a NK [SET] 0. n/a NM [SET] 2. n/a R0 [SET] 1. n/a   Orbit Determination Parameters    # obs. used (total)      115      data-arc span      7418 days (20.31 yr)      first obs. used      1998-01-29      last obs. used      2018-05-22      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .49289      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 19:36:30   Additional Information  Earth MOID = .0131326 au   Jupiter MOID = 3.90929 au   T_jup = 5.552   Nongravitational accels. using nonstandard g(r) = (1 au/ r)^2  [ 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 21.7   n/a MPO224075   diameter diameter 0.086 km 0.002 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2014ApJ...784..110M)   geometric albedo albedo 0.530   0.076 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2014ApJ...784..110M)   154590 (2003 MA3)          Discovered 2003-Jun-26 by NEAT at Haleakala Reference: 20070402/Numbers.arc Last Updated: 2007-04-04 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-May-05 23:10 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin