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JPL Small-Body Database Browser
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18882 (1999 YN4)
Classification: Amor [NEO]          SPK-ID: 2018882
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 195 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2317138932700852 6.6353e-08  
a 1.68518649470863 7.0129e-09 au
q 1.294705371133525 1.1003e-07 au
i 36.81675944459204 1.2551e-05 deg
node 291.6993130472644 9.3707e-06 deg
peri 242.6572319953742 2.178e-05 deg
M 49.00224131522545 2.0513e-05 deg
tp 2458891.736336948721
(2020-Feb-12.23633695)
4.5323e-05 TDB
period 799.0434242911787
2.19
4.9878e-06
1.366e-08
d
yr
n .4505387179918932 2.8124e-09 deg/d
Q 2.075667618283735 8.6379e-09 au
  Orbit Determination Parameters
   # obs. used (total)      857  
   data-arc span      24144 days (66.10 yr)  
   first obs. used      1954-01-04  
   last obs. used      2020-02-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4562  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-13 05:13:12  

Additional Information
 Earth MOID = .431637 au 
 Jupiter MOID = 3.22737 au 
 T_jup = 3.974 
[ 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 16.0   n/a MPO452438  
SMASSII spectral type spec_B S   n/a Binzel et al. (2001) Icarus 151, 139-149  

18882 (1999 YN4)          Discovered 1999-Dec-28 by LINEAR at Socorro
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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