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18350 (1990 QJ2)
Classification: Main-belt Asteroid          SPK-ID: 2018350
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .160106388300709 5.5026e-08  
a 2.191841256851289 1.0337e-08 au
q 1.840913469488343 1.1843e-07 au
i 1.546812892957023 5.5555e-06 deg
node 34.14060577833692 0.00017011 deg
peri .9567583783776605 0.00017063 deg
M 317.6038053985834 1.5865e-05 deg
tp 2457740.084260180687
(2016-Dec-17.58426018)
5.2575e-05 JED
period 1185.255755557091
3.25
8.3848e-06
2.296e-08
d
yr
n .3037319146624128 2.1487e-09 deg/d
Q 2.542769044214236 1.1992e-08 au
  Orbit Determination Parameters
   # obs. used (total)      789  
   data-arc span      9121 days (24.97 yr)  
   first obs. used      1990-08-22  
   last obs. used      2015-08-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52747  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Sep-02 14:50:06  

Additional Information
 Earth MOID = .846064 au 
 Jupiter MOID = 2.87492 au 
 T_jup = 3.655 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.6 mag n/a MPO279707  
rotation period rot_per 97.7866 h n/a LCDB (Rev. 2016-February); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2016) Astron. J. 150, A75.]

18350 (1990 QJ2)          Discovered 1990-Aug-22 by Holt, H. E. at Palomar
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1990 QJ2 = 1995 CJ7 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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