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120977 (1998 WN28)
Classification: Main-belt Asteroid          SPK-ID: 2120977
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1308106018662337 3.8497e-08  
a 2.34377123515998 1.0064e-08 au
q 2.037181109251937 9.1771e-08 au
i 5.377191939440445 4.3063e-06 deg
node 276.2003914709981 5.4338e-05 deg
peri 169.6082785657761 5.9184e-05 deg
M 63.8739719903169 2.2319e-05 deg
tp 2458967.962671123967
(2020-Apr-28.46267112)
8.093e-05 TDB
period 1310.603298759353
3.59
8.4411e-06
2.311e-08
d
yr
n .2746826597649983 1.7691e-09 deg/d
Q 2.650361361068023 1.138e-08 au
  Orbit Determination Parameters
   # obs. used (total)      540  
   data-arc span      7740 days (21.19 yr)  
   first obs. used      1998-11-19  
   last obs. used      2020-01-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54909  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 06:25:21  

Additional Information
 Earth MOID = 1.05342 au 
 Jupiter MOID = 2.53995 au 
 T_jup = 3.545 
[ 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 16.2   n/a MPO296898  

120977 (1998 WN28)          Discovered 1998-Nov-19 by Spacewatch at Kitt Peak
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
Alternate Designations
 1998 WN28 = 2001 RE65 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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