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18353 (1990 QF9)
Classification: Main-belt Asteroid          SPK-ID: 2018353
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 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1145310869807585 2.4691e-08  
a 2.785105869824205 1.0949e-08 au
q 2.466124667196748 7.0381e-08 au
i 15.37917628824555 1.0134e-06 deg
node 149.5185522744012 3.4056e-06 deg
peri 13.3181607933985 9.6845e-06 deg
M 1.679820489211342 6.0959e-06 deg
tp 2459192.578245793100
(2020-Dec-09.07824579)
2.8741e-05 TDB
period 1697.700160701615
4.65
1.0011e-05
2.741e-08
d
yr
n .2120515791500081 1.2504e-09 deg/d
Q 3.104087072451662 1.2203e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2168  
   data-arc span      11169 days (30.58 yr)  
   first obs. used      1990-08-16  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46975  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:27:17  

Additional Information
 Earth MOID = 1.47724 au 
 Jupiter MOID = 1.88742 au 
 T_jup = 3.270 
[ 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 13.47   n/a E2021B10  
rotation period rot_per 18.225 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.]

18353 (1990 QF9)          Discovered 1990-Aug-16 by Elst, E. W. at La Silla
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1990 QF9 = 1998 HX123 = 1999 RC116 = 1999 TC302 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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