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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1595516059873593 2.7531e-08  
a 2.191879196019784 5.4848e-09 au
q 1.842161350164546 6.0867e-08 au
i 1.544408051895266 3.1531e-06 deg
node 34.0917336256806 0.00012547 deg
peri 1.334122522489336 0.00012594 deg
M 142.6630349398867 1.1946e-05 deg
tp 2458926.787295611930
(2020-Mar-18.28729561)
3.8609e-05 TDB
period 1185.286529555163
3.25
4.449e-06
1.218e-08
d
yr
n .303724028767211 1.14e-09 deg/d
Q 2.541597041875023 6.3599e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1438  
   data-arc span      11216 days (30.71 yr)  
   first obs. used      1990-08-22  
   last obs. used      2021-05-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49883  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 17:59:56  

Additional Information
 Earth MOID = .848209 au 
 Jupiter MOID = 2.87481 au 
 T_jup = 3.655 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.70   n/a MPCxxxxx  
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

Alternate Designations
 1990 QJ2 = 1995 CJ7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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