+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   802 Epyaxa (A915 FJ) Classification: Main-belt Asteroid          SPK-ID: 2000802 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 34 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .07845234757491767 2.9952e-08   a 2.197078243204682 4.7299e-09 au q 2.024712297219499 6.521e-08 au i 5.20100941914544 4.1402e-06 deg node 7.782013080033164 3.0126e-05 deg peri 116.13319930735 3.9399e-05 deg M 164.3951516399059 2.5866e-05 deg tp 2458457.308186000398 (2018-Dec-04.80818600) 8.5125e-05 TDB period 1189.506205561286 3.26 3.8412e-06 1.052e-08 d yr n .3026465926086772 9.7731e-10 deg/d Q 2.369444189189866 5.101e-09 au   Orbit Determination Parameters    # obs. used (total)      3085      data-arc span      38490 days (105.38 yr)      first obs. used      1915-03-21      last obs. used      2020-08-06      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .41992      source      ORB      producer      Otto Matic      solution date      2020-Aug-24 22:22:34   Additional Information  Earth MOID = 1.04607 au   Jupiter MOID = 2.65922 au   T_jup = 3.659  [ hide covariance matrix ] Orbital Elements at Epoch 2456587.5 (2013-Oct-22.0) TDB Reference: JPL 34 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .07852960624186685 2.991e-08   q 2.023969972546064 6.5131e-08 au tp 2456079.022893118982 (2012-May-31.52289312) 8.3831e-05 TDB node 7.847922895525173 3.0128e-05 deg peri 115.850528085493 3.9378e-05 deg i 5.201705652441371 4.1398e-06 deg   Orbit Determination Parameters    # obs. used (total)      3085      data-arc span      38490 days (105.38 yr)      first obs. used      1915-03-21      last obs. used      2020-08-06      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .41992      source      ORB      producer      Otto Matic      solution date      2020-Aug-24 22:22:34   Additional Information  Jupiter MOID = 2.65922 au   T_jup = 3.659  Orbit Covariance (6×6)   e q tp node peri i e 8.945842332221683E-16 -1.943831666591753E-15 1.090720020506649E-12 -1.664544427704516E-15 3.278749522849918E-13 5.002564377179557E-16 q -1.943831666591753E-15 4.242017073803446E-15 -2.359083953101976E-12 3.423174558906199E-15 -7.074440654948029E-13 -1.091989215931318E-15 tp 1.090720020506649E-12 -2.359083953101976E-12 7.027700820892227E-9 -7.280796632727949E-12 2.129863354473797E-9 7.481782004019826E-13 node -1.664544427704516E-15 3.423174558906199E-15 -7.280796632727949E-12 9.07722591160703E-10 -9.057652606458064E-10 -1.3680687836208E-11 peri 3.278749522849918E-13 -7.074440654948029E-13 2.129863354473797E-9 -9.057652606458064E-10 1.550591160597313E-9 1.387374659736378E-11 i 5.002564377179557E-16 -1.091989215931318E-15 7.481782004019826E-13 -1.3680687836208E-11 1.387374659736378E-11 1.713771112010548E-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 12.8   n/a MPO473773   diameter diameter 7.423 km 0.193 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   rotation period rot_per 4.392 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List: [Bennefeld, C.; Aguilar, V.; Cooper, T.; Hupp, W.; et al. (2009) Minor Planet Bull. 36, 123-124.] [Warner, B.D. (2009) Minor Planet Bull. 36, 109-116.] [Kryszczynska, A.; Colas, F.; Polinska, M.; Hirsch, R.; et al. (2012) Astron. Astrophys. 546, A72.] [Warner, B.D (2012) Minor Planet Bull. 39, 69-80.] [Stephens, R.D. (2015) Minor Planet Bull. 42, 104-106.] [Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.] [Dykhuis, M.J.; Molnar, L.A.; Gates, C.J.; Gonzales, J.A.; et al. (2016) Icarus 267, 174-203.] [Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.] [Hanus, J.; Delbo, M.; Durech, J.; Ali-Lagoa, V. (2018) Icarus 309, 297-337.] geometric albedo albedo 0.292   0.080 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   802 Epyaxa (A915 FJ)          Discovered 1915-Mar-20 by Wolf, M. at Heidelberg Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  A915 FJ = 1930 YK = 1931 AX = 1970 AM1 = 1972 XW = 1977 FG3  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Oct-29 23:27 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin