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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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .134157701031154 3.9329e-08  
a 2.641320603603303 1.327e-08 au
q 2.286967103737664 1.0485e-07 au
i 12.06541274290973 4.2993e-06 deg
node 264.4645053046404 2.0104e-05 deg
peri 4.799189979178039 2.5683e-05 deg
M 351.4522205237047 1.7152e-05 deg
tp 2459037.728960837114
(2020-Jul-07.22896084)
7.4755e-05 TDB
period 1567.942404051078
4.29
1.1816e-05
3.235e-08
d
yr
n .2296002704371483 1.7303e-09 deg/d
Q 2.995674103468942 1.505e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2029  
   data-arc span      11404 days (31.22 yr)  
   first obs. used      1989-01-29  
   last obs. used      2020-04-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44006  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 04:53:47  

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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1992-Jun-04 02:21 00:01 Thisb 0.0455610428570725 0.0455582572192499 0.0455638285242468 2.66761441301458 2.6676143569152 2448777.597959037 1.09028134664972 151.558863392338 46.449003093034 -25.038814666414 74183.4876980848 T 29 CATAB v2.0f-lin.ifort 2020-May-20 04:54:01 2020-May-20 04:54

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