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18551 (1997 AQ17)
Classification: Main-belt Asteroid          SPK-ID: 2018551
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 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1957359750732126 2.2055e-08  
a 2.803481063655986 1.2907e-08 au
q 2.254738964061994 6.2386e-08 au
i 5.45055134659029 2.6512e-07 deg
node 293.6579656416215 3.6586e-06 deg
peri 47.86328401875715 4.2379e-06 deg
M 154.4786921182047 5.8398e-06 deg
tp 2458464.782730402747
(2018-Dec-12.28273040)
2.4345e-05 TDB
period 1714.529126465841
4.69
1.184e-05
3.242e-08
d
yr
n .2099701862412031 1.45e-09 deg/d
Q 3.352223163249977 1.5433e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2186  
   data-arc span      8851 days (24.23 yr)  
   first obs. used      1996-12-20  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51876  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:31:29  

Additional Information
 Earth MOID = 1.24874 au 
 Jupiter MOID = 2.06852 au 
 T_jup = 3.289 
[ 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 13.44   n/a E2021B10  
diameter diameter 6.883 km 1.563 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
geometric albedo albedo 0.188   0.131 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  

18551 (1997 AQ17)          Discovered 1997-Jan-13 by Farra d'Isonzo at Farra d'Isonzo
Reference: 20001111/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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