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172279 (2002 TO121)
Classification: Main-belt Asteroid          SPK-ID: 2172279
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 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05234333372514589 4.2151e-08  
a 2.772790057087414 3.3701e-08 au
q 2.627652981779521 1.1203e-07 au
i 6.272154495069666 8.1478e-06 deg
node 318.302908504128 4.2137e-05 deg
peri 89.04740911153301 9.9715e-05 deg
M 276.7164939057221 9.5273e-05 deg
tp 2459390.648919157696
(2021-Jun-25.14891916)
0.0004501 TDB
period 1686.451705548702
4.62
3.0746e-05
8.418e-08
d
yr
n .2134659408363377 3.8917e-09 deg/d
Q 2.917927132395306 3.5465e-08 au
  Orbit Determination Parameters
   # obs. used (total)      286  
   data-arc span      5645 days (15.46 yr)  
   first obs. used      2002-10-03  
   last obs. used      2018-03-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56896  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 17:06:33  

Additional Information
 Earth MOID = 1.64635 au 
 Jupiter MOID = 2.28555 au 
 T_jup = 3.326 
[ 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 15.7   n/a MPO436856  
rotation period rot_per 7.83 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.; Cheng, Y.-C.; Ngeow, C.-C.; et al. (2014) Astrophys. J. 788, A17.]

172279 (2002 TO121)          Discovered 2002-Oct-03 by NEAT at Palomar
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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