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227091 (2005 MC21)
Classification: Main-belt Asteroid          SPK-ID: 2227091
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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1692636998956343 4.3975e-08  
a 2.257360624174061 1.3767e-08 au
q 1.875271412927641 1.0068e-07 au
i 3.515664893498819 6.4939e-06 deg
node 162.0608664821432 0.00010447 deg
peri 120.2894044687089 0.00010746 deg
M 212.7213395199317 2.808e-05 deg
tp 2459707.300657346769
(2022-May-07.80065735)
9.9748e-05 TDB
period 1238.796143651294
3.39
1.1333e-05
3.103e-08
d
yr
n .2906047147829478 2.6585e-09 deg/d
Q 2.639449835420481 1.6097e-08 au
  Orbit Determination Parameters
   # obs. used (total)      167  
   data-arc span      6675 days (18.28 yr)  
   first obs. used      2002-10-10  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53885  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 20:00:03  

Additional Information
 Earth MOID = .85999 au 
 Jupiter MOID = 2.50134 au 
 T_jup = 3.601 
[ 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 17.6   n/a MPO507004  

227091 (2005 MC21)          Discovered 2005-Jun-30 by NEAT at Palomar
Reference: 20091202/Numbers.arcLast Updated: 2009-12-04

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