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74587 (1999 ON1)
Classification: Main-belt Asteroid          SPK-ID: 2074587
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1428918762376688 3.607e-08  
a 2.263569738205723 8.645e-09 au
q 1.940124011318698 8.3008e-08 au
i 4.014492679962795 4.5262e-06 deg
node 144.7718779607862 5.9709e-05 deg
peri 122.0383678247687 6.2051e-05 deg
M 78.05866938430363 1.6068e-05 deg
tp 2458730.783268111363
(2019-Sep-04.28326811)
5.5506e-05 TDB
period 1243.910820486447
3.41
7.1261e-06
1.951e-08
d
yr
n .2894098146515178 1.658e-09 deg/d
Q 2.587015465092747 9.8803e-09 au
  Orbit Determination Parameters
   # obs. used (total)      674  
   data-arc span      8812 days (24.13 yr)  
   first obs. used      1995-03-26  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60648  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 05:41:43  

Additional Information
 Earth MOID = .927791 au 
 Jupiter MOID = 2.49279 au 
 T_jup = 3.601 
[ 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 16.4   n/a MPO474632  

74587 (1999 ON1)          Discovered 1999-Jul-21 by Comba, P. G. at Prescott
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 ON1 = 2002 HM4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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