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162000 (1990 OS)
Classification: Apollo [NEO, PHA]          SPK-ID: 2162000
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 95 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4625461007294609 2.2845e-08  
a 1.67832836023562 1.9945e-09 au
q .9020241214649641 3.9033e-08 au
i 1.09243862430917 1.5855e-06 deg
node 346.53749484 0.00018134 deg
peri 21.5445772975412 0.00018278 deg
M 234.4724693547371 7.2591e-06 deg
tp 2459277.417442256314
(2021-Mar-03.91744226)
1.6494e-05 TDB
period 794.1706389014753
2.17
1.4156e-06
3.876e-09
d
yr
n .4533030842061407 8.0803e-10 deg/d
Q 2.454632599006276 2.917e-09 au
  Orbit Determination Parameters
   # obs. used (total)      416  
   # delay obs. used      5  
   # Doppler obs. used      4  
   data-arc span      9679 days (26.50 yr)  
   first obs. used      1990-07-21  
   last obs. used      2017-01-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46016  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-06 09:26:41  

Additional Information
 Earth MOID = .0089571 au 
 Jupiter MOID = 3.00916 au 
 T_jup = 4.107 
[ 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 19.4   n/a MPO325593  
diameter diameter 0.4 km n/a Hazards due to Comets and Asteroids (1994), Ed. T. Gehrels, pp.540-543 based on assumed medium albedo (0.15)
rotation period rot_per 2.536 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Behrend, R. (2003) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]

162000 (1990 OS)          Discovered 1990-Jul-21 by Helin, E. F. at Palomar
Reference: 20070926/Numbers.arcLast Updated: 2007-09-30

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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