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173871 (2001 TW235)
Classification: Main-belt Asteroid          SPK-ID: 2173871
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09501216289416627 6.1113e-08  
a 3.062190356662496 2.4122e-08 au
q 2.771245027682334 1.8632e-07 au
i 10.84148884998225 5.9126e-06 deg
node 153.9637464768497 2.8506e-05 deg
peri 229.55659988088 3.7205e-05 deg
M 179.5333986526441 2.537e-05 deg
tp 2458024.410917575511
(2017-Sep-27.91091758)
0.00013363 TDB
period 1957.251811138935
5.36
2.3127e-05
6.332e-08
d
yr
n .1839313663940431 2.1734e-09 deg/d
Q 3.353135685642658 2.6414e-08 au
  Orbit Determination Parameters
   # obs. used (total)      409  
   data-arc span      8076 days (22.11 yr)  
   first obs. used      1998-03-20  
   last obs. used      2020-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55956  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 03:31:30  

Additional Information
 Earth MOID = 1.78696 au 
 Jupiter MOID = 2.14482 au 
 T_jup = 3.199 
[ 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 15.1   n/a MPO436863  
rotation period rot_per 5.250 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

173871 (2001 TW235)          Discovered 2001-Oct-15 by NEAT at Palomar
Reference: 20080122/Numbers.arcLast Updated: 2008-01-28

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