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390188 (2012 WD20)
Classification: Main-belt Asteroid          SPK-ID: 2390188
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.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04782498428927728 5.4662e-08  
a 2.731748505275597 2.7745e-08 au
q 2.601102675928535 1.6162e-07 au
i 5.312814429634336 5.2191e-06 deg
node 265.979657758299 5.5988e-05 deg
peri 105.0123426812443 8.2194e-05 deg
M 287.7948947873777 6.0951e-05 deg
tp 2459331.269077800827
(2021-Apr-26.76907780)
0.00028081 TDB
period 1649.147489746774
4.52
2.5124e-05
6.879e-08
d
yr
n .2182946050842778 3.3256e-09 deg/d
Q 2.862394334622659 2.9072e-08 au
  Orbit Determination Parameters
   # obs. used (total)      182  
   data-arc span      6164 days (16.88 yr)  
   first obs. used      2003-12-01  
   last obs. used      2020-10-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5465  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 16:43:04  

Additional Information
 Earth MOID = 1.60708 au 
 Jupiter MOID = 2.38346 au 
 T_jup = 3.346 
[ 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 16.75   n/a E2020R02  

390188 (2012 WD20)          Discovered 2007-Sep-09 by Spacewatch at Kitt Peak
Reference: Last Updated: 2014-03-21

[ hide close-approach data ]
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
2081-Feb-17 05:03 00:02 Europ 0.0415990671507089 0.0415596590108453 0.0416384965036114 4.11353135497993 4.11353129286825 2481177.710568976 2.20384697224472 2460.7605616924 87.071904083546 37.0563649800774 43087.3357981632 T 13 CATAB v2.0f-lin.ifort 2020-Nov-12 16:43:05 2020-Nov-12 16:43
2140-Dec-22 01:53 00:40 Iris 0.0337926708734182 0.0337188486770526 0.033866495450824 2.7208847283755 2.72088466585241 2503034.578246560 40.3767688791775 3705.31915548097 125.421108706 7.00651173684011 5093.08165457964 T 13 CATAB v2.0f-lin.ifort 2020-Nov-12 16:43:05 2020-Nov-12 16:43
2173-May-29 01:54 01:27 Hygie 0.0480342592665068 0.0480023213202673 0.048066362488185 1.93632686843349 1.93632645302755 2514880.579505344 87.1627915809118 4697.85705585413 98.0518185733931 -70.1873766842996 68431.4676197171 T 13 CATAB v2.0f-lin.ifort 2020-Nov-12 16:43:05 2020-Nov-12 16:43

Alternate Designations
 2012 WD20 = 2007 RO51 = 2011 OL14 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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