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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 
[ 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 E2021B55  

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

[ 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
1930-Aug-27 03:56 00:01 Mars 0.0869170275295166 0.0869128591437868 0.0869212014246369 19.2132661829729 19.2130947469593 2426215.663810291 1.26038015095017 1132.1025991413 40.7968573094868 79.6142259295098 313875.861043687 T 76 CATAB v2.0f-lin.ifort 2021-Feb-17 05:22:48 2021-Feb-17 05:22
1933-Nov-01 20:31 < 00:01 Earth 0.492157476977774 0.492155435173554 0.492159520286679 22.8034915602618 22.8032541447006 2427378.355009322 0.145148677211461 1458.63202211122 36.7593111886139 86.2650862618355 1972958.91780388 T 76 CATAB v2.0f-lin.ifort 2021-Feb-17 05:22:48 2021-Feb-17 05:22
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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