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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 ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1344527047128704 1.4398e-08  
a 2.64186126094681 1.2484e-08 au
q 2.286655868936357 3.8755e-08 au
i 12.06105821204284 5.1431e-07 deg
node 264.4526679668101 4.0328e-06 deg
peri 4.668232251775136 9.8792e-06 deg
M 37.4658129244693 6.8988e-06 deg
tp 2459037.271459924043
(2020-Jul-06.77145992)
2.9874e-05 TDB
period 1568.423846716166
4.29
1.1117e-05
3.044e-08
d
yr
n .2295297924433742 1.6269e-09 deg/d
Q 2.997066652957263 1.4162e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2287  
   data-arc span      11642 days (31.87 yr)  
   first obs. used      1989-01-29  
   last obs. used      2020-12-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42207  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-17 02:03:13  

Additional Information
 Earth MOID = 1.26906 au 
 Jupiter MOID = 2.10141 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 12.60   n/a E2021B10  
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. 2020-October); 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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