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18765 (1999 JN17)
Classification: Main-belt Asteroid          SPK-ID: 2018765
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 .2085965087319958 1.7083e-08  
a 2.236271861197745 5.6202e-09 au
q 1.769793358376293 3.872e-08 au
i 4.27257985851607 1.2982e-06 deg
node 215.7815669058841 5.825e-06 deg
peri 79.62941771632701 9.3806e-06 deg
M 149.9623174536083 5.6559e-06 deg
tp 2458691.679069288932
(2019-Jul-27.17906929)
1.872e-05 TDB
period 1221.477089487171
3.34
4.6048e-06
1.261e-08
d
yr
n .2947251349193489 1.1111e-09 deg/d
Q 2.702750364019197 6.7926e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2081  
   data-arc span      22464 days (61.50 yr)  
   first obs. used      1959-09-02  
   last obs. used      2021-03-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46289  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:37:25  

Additional Information
 Earth MOID = .7582 au 
 Jupiter MOID = 2.50657 au 
 T_jup = 3.606 
[ 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 14.0   n/a MPO337417  
diameter diameter 3.537 km 0.755 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  
geometric albedo albedo 0.278   0.105 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  

18765 (1999 JN17)          Discovered 1999-May-14 by LINEAR at Socorro
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 JN17 = 1959 RW = 1969 QG 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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