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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1428918409977837 3.552e-08  
a 2.263569746379231 8.4365e-09 au
q 1.940124098092217 8.1701e-08 au
i 4.014492096619004 4.3776e-06 deg
node 144.7718514664364 5.9551e-05 deg
peri 122.0384031086272 6.182e-05 deg
M 78.05865953232926 1.5764e-05 deg
tp 2458730.783300692090
(2019-Sep-04.28330069)
5.4472e-05 TDB
period 1243.91082722389
3.41
6.9542e-06
1.904e-08
d
yr
n .2894098130839759 1.618e-09 deg/d
Q 2.587015394666246 9.642e-09 au
  Orbit Determination Parameters
   # obs. used (total)      715  
   data-arc span      9256 days (25.34 yr)  
   first obs. used      1995-03-26  
   last obs. used      2020-07-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60022  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 07:13:04  

Additional Information
 Earth MOID = .927791 au 
 Jupiter MOID = 2.49279 au 
 T_jup = 3.601 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456691.5 (2014-Feb-03.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1434604826849511 3.5615e-08  
q 1.938710954548228 8.1937e-08 au
tp 2456241.709548026479
(2012-Nov-10.20954803)
5.6012e-05 TDB
node 144.8187586696808 5.9627e-05 deg
peri 121.908933263185 6.186e-05 deg
i 4.011592883461434 4.3752e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      715  
   data-arc span      9256 days (25.34 yr)  
   first obs. used      1995-03-26  
   last obs. used      2020-07-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60022  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 07:13:04  

Additional Information
 Jupiter MOID = 2.49279 au 
 T_jup = 3.601 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.268424450117504E-15 -2.907088397926341E-15 4.013991849212898E-15 2.470596600908448E-15 1.972132142169956E-14 -1.1327430807272E-15
q -2.907088397926341E-15 6.71373484754843E-15 -1.13380603472247E-13 -5.364484801781151E-15 -7.015616089948303E-14 2.652532767911476E-15
tp 4.013991849212898E-15 -1.13380603472247E-13 3.137341584296991E-9 -1.082203609755855E-11 9.356043810105339E-10 1.850844151931324E-12
node 2.470596600908448E-15 -5.364484801781151E-15 -1.082203609755855E-11 3.555321724652127E-9 -3.549415994902473E-9 3.454718057153962E-11
peri 1.972132142169956E-14 -7.015616089948303E-14 9.356043810105339E-10 -3.549415994902473E-9 3.826661182224694E-9 -3.390030620810578E-11
i -1.1327430807272E-15 2.652532767911476E-15 1.850844151931324E-12 3.454718057153962E-11 -3.390030620810578E-11 1.914235242222988E-11

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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