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JPL Small-Body Database Browser
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18835 (1999 NK56)
Classification: Main-belt Asteroid          SPK-ID: 2018835
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1341577010858171 3.9513e-08  
a 2.641320603424079 1.3373e-08 au
q 2.286967103438101 1.052e-07 au
i 12.06541311701187 4.3124e-06 deg
node 264.4645070608461 2.0252e-05 deg
peri 4.799187995670334 2.5909e-05 deg
M 351.4522208680576 1.7472e-05 deg
tp 2459037.728959333532
(2020-Jul-07.22895933)
7.6156e-05 TDB
period 1567.942403891492
4.29
1.1908e-05
3.26e-08
d
yr
n .2296002704605171 1.7437e-09 deg/d
Q 2.995674103410057 1.5167e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2000  
   data-arc span      11320 days (30.99 yr)  
   first obs. used      1989-01-29  
   last obs. used      2020-01-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44011  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:35:52  

Additional Information
 Earth MOID = 1.27115 au 
 Jupiter MOID = 2.10397 au 
 T_jup = 3.351 
[ 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 12.5   n/a MPO384915  
diameter diameter 8.460 km 0.212 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 16.259 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Ditteon, R.; West, J. (2011) Minor Planet Bull. 38, 214-217.]
geometric albedo albedo 0.205   0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

18835 (1999 NK56)          Discovered 1999-Jul-12 by LINEAR at Socorro
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 NK56 = 1989 BX1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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