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120409 (2178 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2120409
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2227573914163131 3.4259e-08  
a 2.409128372853016 8.8864e-09 au
q 1.872477220929252 8.146e-08 au
i 6.282330840631704 6.6146e-06 deg
node 349.5795928508521 4.4731e-05 deg
peri 316.1364883395984 4.8731e-05 deg
M 82.40404375914065 1.9464e-05 deg
tp 2458887.867327008669
(2020-Feb-08.36732701)
7.2922e-05 TDB
period 1365.803874939023
3.74
7.5569e-06
2.069e-08
d
yr
n .2635810357589389 1.4584e-09 deg/d
Q 2.945779524776782 1.0866e-08 au
  Orbit Determination Parameters
   # obs. used (total)      450  
   data-arc span      22024 days (60.30 yr)  
   first obs. used      1960-09-24  
   last obs. used      2021-01-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59022  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 09:24:57  

Additional Information
 Earth MOID = .861874 au 
 Jupiter MOID = 2.33663 au 
 T_jup = 3.479 
[ 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 16.6   n/a MPO469248  

120409 (2178 P-L)          Discovered 1960-Sep-24 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

[ show close-approach data ]
Alternate Designations
 2178 P-L = 2000 EJ177 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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