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JPL Small-Body Database Browser
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172034 (2001 WR1)
Classification: Amor [NEO]          SPK-ID: 2172034
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 161 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2025888244393514 7.0937e-08  
a 1.277247250655394 1.9437e-09 au
q 1.018491231626725 9.0609e-08 au
i 25.02954330135236 1.1461e-05 deg
node 6.526931114855826 9.056e-06 deg
peri 48.55232072058639 2.3741e-05 deg
M 17.15286946126697 2.0408e-05 deg
tp 2458575.378522796394
(2019-Apr-01.87852280)
2.9871e-05 TDB
period 527.2430839469761
1.44
1.2035e-06
3.295e-09
d
yr
n .6827970076060866 1.5586e-09 deg/d
Q 1.536003269684064 2.3375e-09 au
  Orbit Determination Parameters
   # obs. used (total)      741  
   data-arc span      23837 days (65.26 yr)  
   first obs. used      1953-02-14  
   last obs. used      2018-05-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47093  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-May-22 07:10:13  

Additional Information
 Earth MOID = .0751952 au 
 Jupiter MOID = 3.84167 au 
 T_jup = 4.953 
[ 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 17.8   n/a MPO436855  
diameter diameter 0.631 km 0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
rotation period rot_per 8.0475 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Warner, B.D. (2018) Minor Planet Bull. 45, 248-256.]
geometric albedo albedo 0.336   0.046 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  

172034 (2001 WR1)          Discovered 2001-Nov-17 by LINEAR at Socorro
Reference: 20071224/Numbers.arcLast Updated: 2007-12-22

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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