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305720 (2009 CM20)
Classification: Main-belt Asteroid          SPK-ID: 2305720
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 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2380677807760751 1.0875e-07  
a 2.309520253721696 1.785e-08 au
q 1.759697892260774 2.5415e-07 au
i 2.845494471626486 6.683e-06 deg
node 184.2728558838421 0.00012998 deg
peri 179.9858538569097 0.00013066 deg
M 188.4246983313731 1.7269e-05 deg
tp 2459611.488955867657
(2022-Jan-31.98895587)
6.1433e-05 TDB
period 1281.979527200075
3.51
1.4862e-05
4.069e-08
d
yr
n .2808157169141873 3.2556e-09 deg/d
Q 2.859342615182618 2.2099e-08 au
  Orbit Determination Parameters
   # obs. used (total)      237  
   data-arc span      5612 days (15.36 yr)  
   first obs. used      2004-11-10  
   last obs. used      2020-03-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54251  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-11 19:11:00  

Additional Information
 Earth MOID = .757638 au 
 Jupiter MOID = 2.60085 au 
 T_jup = 3.546 
[ 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 17.3   n/a MPO471210  

305720 (2009 CM20)          Discovered 2009-Feb-01 by Spacewatch at Kitt Peak
Reference: 20111110/Numbers.arcLast Updated: 2011-11-14

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2072-Mar-19 06:14 00:02 Hebe 0.0178655245269827 0.0178488428777982 0.0178822377043424 4.07766443187044 4.07766434653483 2477920.759787778 1.86843170667262 1448.10036528227 52.5347315816392 -54.9793884890128 41649.4730962518 T 8 CATAB v2.0f-lin.ifort 2020-Nov-11 19:11:00 2020-Nov-11 19:11
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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