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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 96 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4625405229126147 2.267e-08  
a 1.67850744666657 2.0045e-09 au
q .9021297345726969 3.8757e-08 au
i 1.092417666854111 1.585e-06 deg
node 346.5350831190487 0.00018128 deg
peri 21.53201505625117 0.00018268 deg
M 325.1451983007906 7.3807e-06 deg
tp 2459277.403029887969
(2021-Mar-03.90302989)
1.6419e-05 TDB
period 794.2977555455996
2.17
1.4229e-06
3.896e-09
d
yr
n .453230539160617 8.1189e-10 deg/d
Q 2.454885158760443 2.9317e-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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45736  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 20:07:56  

Additional Information
 Earth MOID = .00907734 au 
 Jupiter MOID = 3.00996 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. 2020-October); 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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