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18350 (1990 QJ2)
Classification: Main-belt Asteroid          SPK-ID: 2018350
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1594293017432107 3.0196e-08  
a 2.192092139235206 5.8713e-09 au
q 1.842608420120156 6.7412e-08 au
i 1.544349915581103 3.3701e-06 deg
node 34.0943778690811 0.00012844 deg
peri 1.353368717088331 0.0001289 deg
M 83.12431587310334 1.1863e-05 deg
tp 2458926.776416396585
(2020-Mar-18.27641640)
3.8648e-05 TDB
period 1185.459261374978
3.25
4.7627e-06
1.304e-08
d
yr
n .3036797735102654 1.2201e-09 deg/d
Q 2.541575858350256 6.8074e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1249  
   data-arc span      11106 days (30.41 yr)  
   first obs. used      1990-08-22  
   last obs. used      2021-01-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51588  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:37:51  

Additional Information
 Earth MOID = .848211 au 
 Jupiter MOID = 2.87369 au 
 T_jup = 3.655 
[ 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 15.6   n/a MPO435869  
rotation period rot_per 97.787 h n/a LCDB (Rev. 2020-October); 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. (2015) 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 | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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