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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1427696353620096 3.2436e-08  
a 2.263739287690111 7.4702e-09 au
q 1.940546055031938 7.3309e-08 au
i 4.014441272287107 3.6706e-06 deg
node 144.7707444511074 5.9195e-05 deg
peri 122.0581231106962 6.0926e-05 deg
M 135.9297343539429 1.4963e-05 deg
tp 2458730.768151963374
(2019-Sep-04.26815196)
5.1282e-05 TDB
period 1244.050583170143
3.41
6.1579e-06
1.686e-08
d
yr
n .2893773009475488 1.4324e-09 deg/d
Q 2.586932520348283 8.5367e-09 au
  Orbit Determination Parameters
   # obs. used (total)      801  
   data-arc span      9444 days (25.86 yr)  
   first obs. used      1995-03-26  
   last obs. used      2021-02-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .58428  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 13:14:36  

Additional Information
 Earth MOID = .926439 au 
 Jupiter MOID = 2.49185 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 16.39   n/a MPCxxxxx  

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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