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30755 (1981 EO39)
Classification: Main-belt Asteroid          SPK-ID: 2030755
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09105414660915222 4.9561e-08  
a 2.694405960612619 1.2087e-08 au
q 2.449069125250424 1.3525e-07 au
i 2.160398830884003 5.2761e-06 deg
node 159.9292907381519 9.8776e-05 deg
peri 223.7941615625753 0.00010212 deg
M 141.1318376924037 2.5408e-05 deg
tp 2458567.191279011174
(2019-Mar-24.69127901)
0.00011242 TDB
period 1615.447961875783
4.42
1.087e-05
2.976e-08
d
yr
n .2228484039696239 1.4995e-09 deg/d
Q 2.939742795974813 1.3187e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1042  
   data-arc span      14659 days (40.13 yr)  
   first obs. used      1981-02-02  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56934  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 04:31:24  

Additional Information
 Earth MOID = 1.4515 au 
 Jupiter MOID = 2.47447 au 
 T_jup = 3.363 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.12   n/a MPCxxxxx  

30755 (1981 EO39)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20011130/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1981 EO39 = 1996 TG1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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