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129588 (1997 TN21)
Classification: Main-belt Asteroid          SPK-ID: 2129588
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1521263330139268 4.3286e-08  
a 2.22455407446551 8.1523e-09 au
q 1.886140820525882 9.5291e-08 au
i 5.428792251027281 6.7655e-06 deg
node 25.22518206004284 3.5837e-05 deg
peri 230.7017776414418 4.2613e-05 deg
M 55.00758262498583 2.1593e-05 deg
tp 2458815.324751370487
(2019-Nov-27.82475137)
7.2539e-05 TDB
period 1211.889094656279
3.32
6.6618e-06
1.824e-08
d
yr
n .2970568854752378 1.6329e-09 deg/d
Q 2.562967328405137 9.3925e-09 au
  Orbit Determination Parameters
   # obs. used (total)      610  
   data-arc span      8421 days (23.06 yr)  
   first obs. used      1997-09-28  
   last obs. used      2020-10-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5711  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 16:47:56  

Additional Information
 Earth MOID = .877225 au 
 Jupiter MOID = 2.48969 au 
 T_jup = 3.626 
[ 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 16.5   n/a MPO426809  
diameter diameter 1.707 km 0.234 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.183   0.063 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

129588 (1997 TN21)          Discovered 1997-Oct-04 by Spacewatch at Kitt Peak
Reference: 20060711/Numbers.arcLast Updated: 2006-07-17

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Alternate Designations
 1997 TN21 = 2000 QD204 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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