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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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457664.5 (2016-Oct-03.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2373600896826377 1.0871e-07  
q 1.762844390473724 2.5385e-07 au
tp 2457045.115388354184
(2015-Jan-22.61538835)
6.6728e-05 TDB
node 184.2776945126172 0.00012999 deg
peri 179.7806104223031 0.00013067 deg
i 2.843543419185712 6.6796e-06 deg
  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
 Jupiter MOID = 2.60085 au 
 T_jup = 3.546 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.181893214095942E-14 -2.755887071520668E-14 5.260835695756516E-12 2.304394356384651E-13 6.055404814518462E-13 -1.961054572375127E-14
q -2.755887071520668E-14 6.443904047012728E-14 -1.249562099113993E-11 -5.389567355856265E-13 -1.446777760834977E-12 4.629684684990251E-14
tp 5.260835695756516E-12 -1.249562099113993E-11 4.452675706730107E-9 1.186047942296453E-10 8.643775694272765E-10 -1.317513751780269E-11
node 2.304394356384651E-13 -5.389567355856265E-13 1.186047942296453E-10 1.68973472096925E-8 -1.685621773850622E-8 3.523301762866255E-10
peri 6.055404814518462E-13 -1.446777760834977E-12 8.643775694272765E-10 -1.685621773850622E-8 1.707505324869353E-8 -3.545914590357602E-10
i -1.961054572375127E-14 4.629684684990251E-14 -1.317513751780269E-11 3.523301762866255E-10 -3.545914590357602E-10 4.461648737910254E-11

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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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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