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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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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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1428918547760523 3.272e-08  
a 2.263569742860636 7.6032e-09 au
q 1.940124063888328 7.4097e-08 au
i 4.014488814894308 3.8075e-06 deg
node 144.7718568890625 5.9323e-05 deg
peri 122.0384048413372 6.111e-05 deg
M 78.05865524034951 1.5034e-05 deg
tp 2458730.783316151091
(2019-Sep-04.28331615)
5.1736e-05 TDB
period 1243.910824323504
3.41
6.2673e-06
1.716e-08
d
yr
n .2894098137587834 1.4582e-09 deg/d
Q 2.587015421832944 8.6896e-09 au
  Orbit Determination Parameters
   # obs. used (total)      771  
   data-arc span      9366 days (25.64 yr)  
   first obs. used      1995-03-26  
   last obs. used      2020-11-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59087  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 22:00:57  

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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