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277473 (2005 WD1)
Classification: Amor [NEO]          SPK-ID: 2277473
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 76 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4418323206050818 7.7107e-08  
a 2.199242804336509 2.5945e-08 au
q 1.227546252522481 1.726e-07 au
i 43.08049821449745 2.006e-05 deg
node 52.31035101584194 1.1601e-05 deg
peri 285.8881990226681 1.9308e-05 deg
M 215.7026673949844 2.708e-05 deg
tp 2459477.989689990307
(2021-Sep-20.48968999)
9.714e-05 TDB
period 1191.264490432691
3.26
2.1081e-05
5.772e-08
d
yr
n .3021998917043526 5.3478e-09 deg/d
Q 3.170939356150537 3.7409e-08 au
  Orbit Determination Parameters
   # obs. used (total)      218  
   data-arc span      6149 days (16.84 yr)  
   first obs. used      2004-04-17  
   last obs. used      2021-02-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55976  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-17 05:22:48  

Additional Information
 Earth MOID = .496743 au 
 Jupiter MOID = 3.10941 au 
 T_jup = 3.218 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456119.5 (2012-Jul-11.0) TDB
Reference: JPL 76 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4424607761040952 7.7516e-08  
q 1.22631876572598 1.7368e-07 au
tp 2455904.153337948801
(2011-Dec-08.65333795)
4.8297e-05 TDB
node 52.37110866730715 1.1621e-05 deg
peri 285.9462728011771 1.9246e-05 deg
i 43.06664840975212 2.0063e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      218  
   data-arc span      6149 days (16.84 yr)  
   first obs. used      2004-04-17  
   last obs. used      2021-02-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55976  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-17 05:22:48  

Additional Information
 Jupiter MOID = 3.10941 au 
 T_jup = 3.218 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.008776944397229E-15 -1.341729619227903E-14 1.136650835798807E-12 2.310222296570651E-14 6.555226760896558E-13 -9.691089548663162E-14
q -1.341729619227903E-14 3.01631269164698E-14 -2.155118762424588E-12 -4.494265304684013E-14 -1.372614176270973E-12 2.180304285881006E-13
tp 1.136650835798807E-12 -2.155118762424588E-12 2.332636624653149E-9 5.278830106754128E-11 7.35105165225655E-10 -3.53258294634349E-12
node 2.310222296570651E-14 -4.494265304684013E-14 5.278830106754128E-11 1.350373567664697E-10 -8.094053126016327E-11 -7.530081036613527E-11
peri 6.555226760896558E-13 -1.372614176270973E-12 7.35105165225655E-10 -8.094053126016327E-11 3.704031881732559E-10 4.468512454527058E-11
i -9.691089548663162E-14 2.180304285881006E-13 -3.53258294634349E-12 -7.530081036613527E-11 4.468512454527058E-11 4.025297902878877E-10

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 E2021B55  

277473 (2005 WD1)          Discovered 2005-Nov-21 by LINEAR at Socorro
Reference: 20110517/Numbers.arcLast Updated: 2011-05-20

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