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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1427696338848989 3.2495e-08  
a 2.263739286981541 7.4969e-09 au
q 1.940546057768324 7.3451e-08 au
i 4.014441446186665 3.7104e-06 deg
node 144.7707458590896 5.929e-05 deg
peri 122.0581202307856 6.104e-05 deg
M 135.9297355397477 1.5031e-05 deg
tp 2458730.768148086138
(2019-Sep-04.26814809)		 5.1524e-05 TDB
period 1244.050582586045
3.41		 6.1799e-06
1.692e-08		 d
yr
n .2893773010834151 1.4375e-09 deg/d
Q 2.586932516194758 8.5672e-09 au
   Orbit Determination Parameters
   # obs. used (total)      789  
   data-arc span      9422 days (25.80 yr)  
   first obs. used      1995-03-26  
   last obs. used      2021-01-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58704  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 06:58:22  

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 16.4   n/a MPO474632  

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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)		 Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1934-Nov-29 10:51 < 00:01 Hebe 0.0462197414949395 0.0462180375162648 0.0462214483372207 6.98065360270417 6.98065358343629 2427770.951906107 0.694947479728972 674.269374324083 43.7432975842903 -83.7780678826661 157105.42180067 T 23 CATAB v2.0f-lin.ifort 2021-Feb-24 06:58:24 2021-Feb-24 06:58
2136-Mar-23 10:15 < 00:01 Juno 0.0314796843144434 0.0314565258452373 0.0315028428505127 7.74421819165253 7.74421814174823 2501299.927040629 0.216453669254684 1156.74764430636 35.9690634593778 3.57216497500751 9108.11268784592 T 23 CATAB v2.0f-lin.ifort 2021-Feb-24 06:58:24 2021-Feb-24 06:58
2188-Sep-10 01:41 < 00:01 Eunom 0.0497771502815836 0.0497501328262069 0.0498041679154238 6.72701142370894 6.72701138178696 2520463.569905384 0.75916937483133 1354.86851379512 50.933317075755 6.2884848732734 16911.8546336773 T 23 CATAB v2.0f-lin.ifort 2021-Feb-24 06:58:24 2021-Feb-24 06:58

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