+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   153814 (2001 WN5) Classification: Apollo [NEO, PHA]          SPK-ID: 2153814 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 172 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .4670549144118712 8.0752e-09   a 1.711795518767492 1.331e-09 au q .9122930092589162 1.402e-08 au i 1.91916487242699 1.9328e-06 deg node 277.434353267167 8.9218e-05 deg peri 44.57060653076861 9.0324e-05 deg M 126.3547780689482 1.1768e-06 deg tp 2458713.378692473139 (2019-Aug-17.87869247) 2.7517e-06 TDB period 818.0432294635305 2.24 9.5411e-07 2.612e-09 d yr n .4400745425594276 5.1328e-10 deg/d Q 2.511298028276067 1.9527e-09 au   Orbit Determination Parameters    # obs. used (total)      933      # delay obs. used      4      # Doppler obs. used      0      data-arc span      8776 days (24.03 yr)      first obs. used      1996-02-10      last obs. used      2020-02-20      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .3869      source      ORB      producer      Otto Matic      solution date      2020-Feb-21 05:14:46   Additional Information  Earth MOID = .00163884 au   Jupiter MOID = 2.83689 au   T_jup = 4.053  [ 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 18.3   n/a MPO502910   diameter diameter 0.932 km 0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2011ApJ...743..156M)   rotation period rot_per 4.253 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Pravec, P.; Wolf, M.; Sarounova, L. (2019) http://www.asu.cas.cz/~ppravec/neo.htm] [Skiff, B.A.; McLelland, K.P.; Sanborn, J.; Pravec, P.; Koehn, B.W. (2019). Minor Planet Bull. 46, 458-503.] [Warner, B.D.; Stephens, R.D. (2020) Minor Planet Bull. 47, 105-120.] geometric albedo albedo 0.097   0.016 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2011ApJ...743..156M)   153814 (2001 WN5)          Discovered 2001-Nov-20 by LONEOS at Anderson Mesa 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-Jan-26 01:00 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin