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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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1428918525854319 3.3309e-08  
a 2.263569743359389 7.7866e-09 au
q 1.940124069274435 7.5712e-08 au
i 4.014490874316762 3.9841e-06 deg
node 144.7718556775856 5.9327e-05 deg
peri 122.0384052119577 6.1218e-05 deg
M 78.05865568278791 1.5194e-05 deg
tp 2458730.783314533186
(2019-Sep-04.28331453)		 5.2337e-05 TDB
period 1243.910824734627
3.41		 6.4185e-06
1.757e-08		 d
yr
n .289409813663131 1.4933e-09 deg/d
Q 2.587015417444343 8.8993e-09 au
   Orbit Determination Parameters
   # obs. used (total)      750  
   data-arc span      9343 days (25.58 yr)  
   first obs. used      1995-03-26  
   last obs. used      2020-10-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59249  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:43:05  

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

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