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528381 (2008 ST291)
Classification: TransNeptunian Object          SPK-ID: 2528381
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .578356408732191 7.0901e-05  
a 100.56714973338 0.014866 au
q 42.40349417714981 0.0033315 au
i 20.73515253126741 0.00013491 deg
node 330.9035979264175 0.00035006 deg
peri 325.0698616989908 0.0060722 deg
M 23.42307308178053 0.006053 deg
tp 2435032.929589830372
(1954-Oct-17.42958983)
0.88684 TDB
period 368368.630261951
1008.54
81.678
0.2236
d
yr
n .0009772819138915278 2.1669e-07 deg/d
Q 158.7308052896101 0.023463 au
  Orbit Determination Parameters
   # obs. used (total)      93  
   data-arc span      4346 days (11.90 yr)  
   first obs. used      2008-09-24  
   last obs. used      2020-08-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      2  
   norm. resid. RMS      .50709  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-11 22:13:20  

Additional Information
 Earth MOID = 41.4092 au 
 Jupiter MOID = 37.3804 au 
 T_jup = 6.760 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 4.4   n/a E2018X68  

528381 (2008 ST291)          Discovered 2008-Sep-24 by Schwamb, M. E., Brown, M. E., Rabinowitz, D. L. at Palomar
Reference: Last Updated: 2019-05-29
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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