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18172 (2000 QL7)
Classification: Amor [NEO]          SPK-ID: 2018172
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 295 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5110952192013917 2.1578e-08  
a 2.424721253618554 3.9752e-09 au
q 1.185457812998106 5.2275e-08 au
i 17.83312668169874 4.8279e-06 deg
node 338.4606518502648 9.6147e-06 deg
peri 100.7802357412624 1.2771e-05 deg
M 44.51535205112176 2.8201e-06 deg
tp 2458829.970912829806
(2019-Dec-12.47091283)
1.0853e-05 TDB
period 1379.085384088813
3.78
3.3914e-06
9.285e-09
d
yr
n .2610425751396521 6.4195e-10 deg/d
Q 3.663984694239002 6.0069e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1871  
   data-arc span      15646 days (42.84 yr)  
   first obs. used      1977-07-21  
   last obs. used      2020-05-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .3915  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jul-12 06:36:55  

Additional Information
 Earth MOID = .365032 au 
 Jupiter MOID = 2.07299 au 
 T_jup = 3.263 
[ 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 MPO347666  

18172 (2000 QL7)          Discovered 2000-Aug-25 by LINEAR at Socorro
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 2000 QL7 = 1986 CA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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