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22662 (1998 QL18)
Classification: Main-belt Asteroid          SPK-ID: 2022662
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1495507596313145 3.9042e-08  
a 3.172864370669057 2.264e-08 au
q 2.698360093828367 1.3046e-07 au
i 4.382710126052366 4.6735e-06 deg
node 339.912870480011 5.4249e-05 deg
peri 69.00576251122162 5.7202e-05 deg
M 286.6601286492419 2.1234e-05 deg
tp 2459621.045830674688
(2022-Feb-10.54583067)
0.00012467 TDB
period 2064.313670783698
5.65
2.2095e-05
6.049e-08
d
yr
n .1743921018860129 1.8666e-09 deg/d
Q 3.647368647509748 2.6026e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1348  
   data-arc span      9837 days (26.93 yr)  
   first obs. used      1993-10-10  
   last obs. used      2020-09-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57768  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:08:51  

Additional Information
 Earth MOID = 1.71155 au 
 Jupiter MOID = 1.77215 au 
 T_jup = 3.180 
[ 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 13.56   n/a E2021B10  
diameter diameter 8.095 km 0.940 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 16.460 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.]
geometric albedo albedo 0.118   0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

22662 (1998 QL18)          Discovered 1998-Aug-17 by LINEAR at Socorro
Reference: 20010309/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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