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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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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 161 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2024731604305842 7.0932e-08  
a 1.277264305571837 1.9502e-09 au
q 1.018652564917532 9.0586e-08 au
i 25.02901284664038 1.1461e-05 deg
node 6.516748819806933 9.0556e-06 deg
peri 48.55623674455182 2.3758e-05 deg
M 290.2758330323426 2.0626e-05 deg
tp 2459102.617558691977
(2020-Sep-10.11755869)
3.0287e-05 TDB
period 527.253644294733
1.44
1.2076e-06
3.306e-09
d
yr
n .6827833318848739 1.5638e-09 deg/d
Q 1.535876046226142 2.3451e-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 = .0761325 au 
 Jupiter MOID = 3.84004 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-August); 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

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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