+ 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 37 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .07845234944541059 2.9807e-08   a 2.197078242672406 4.6203e-09 au q 2.024712292619361 6.4792e-08 au i 5.201006718000051 3.8166e-06 deg node 7.782004489357466 2.9665e-05 deg peri 116.1332139920861 3.7749e-05 deg M 164.3951461678268 2.4293e-05 deg tp 2458457.308204278549 (2018-Dec-04.80820428) 7.9766e-05 TDB period 1189.506205129021 3.26 3.7522e-06 1.027e-08 d yr n .3026465927186586 9.5467e-10 deg/d Q 2.36944419272545 4.9828e-09 au   Orbit Determination Parameters    # obs. used (total)      3268      data-arc span      38592 days (105.66 yr)      first obs. used      1915-03-21      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .4131      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 01:56:14   Additional Information  Earth MOID = 1.04607 au   Jupiter MOID = 2.65922 au   T_jup = 3.659  [ hide covariance matrix ] Orbital Elements at Epoch 2456837.5 (2014-Jun-29.0) TDB Reference: JPL 37 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .07861842593680826 2.9794e-08   q 2.023582832377975 6.4776e-08 au tp 2457268.248717299299 (2015-Sep-02.74871730) 7.848e-05 TDB node 7.840787858269271 2.9665e-05 deg peri 115.9376979085508 3.7708e-05 deg i 5.202084060243652 3.8165e-06 deg   Orbit Determination Parameters    # obs. used (total)      3268      data-arc span      38592 days (105.66 yr)      first obs. used      1915-03-21      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .4131      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 01:56:14   Additional Information  Jupiter MOID = 2.65922 au   T_jup = 3.659  Orbit Covariance (6×6)   e q tp node peri i e 8.876634169085962E-16 -1.925918738626659E-15 1.024466197277428E-12 -1.327637275118675E-15 2.997241708670344E-13 6.795712606005919E-16 q -1.925918738626659E-15 4.195869930231001E-15 -2.170040047787541E-12 2.694390787841224E-15 -6.367758290086444E-13 -1.454333376754001E-15 tp 1.024466197277428E-12 -2.170040047787541E-12 6.159091390828775E-9 -8.009548254127049E-12 1.831238036661518E-9 7.903210182295057E-13 node -1.327637275118675E-15 2.694390787841224E-15 -8.009548254127049E-12 8.800122155594966E-10 -8.78390611896739E-10 -2.169816256673438E-11 peri 2.997241708670344E-13 -6.367758290086444E-13 1.831238036661518E-9 -8.78390611896739E-10 1.421891255545189E-9 2.184675977771357E-11 i 6.795712606005919E-16 -1.454333376754001E-15 7.903210182295057E-13 -2.169816256673438E-11 2.184675977771357E-11 1.456572712714288E-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. 2020-October); 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.] [Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.] 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 ] 2021-Jan-26 00:09 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin