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101890 (1999 NK55)
Classification: Outer Main-belt Asteroid          SPK-ID: 2101890
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2166257689216174 4.6176e-08  
a 3.203248873364394 2.6917e-08 au
q 2.509342623124528 1.5499e-07 au
i 27.73335731705306 8.5039e-06 deg
node 299.5359021352479 1.1105e-05 deg
peri 92.19706159742441 2.3833e-05 deg
M 181.5094390313224 2.0748e-05 deg
tp 2460038.738677644842
(2023-Apr-04.23867764)
0.00012809 TDB
period 2094.037476960664
5.73
2.6394e-05
7.226e-08
d
yr
n .1719166939278053 2.1669e-09 deg/d
Q 3.89715512360426 3.2747e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1010  
   data-arc span      7616 days (20.85 yr)  
   first obs. used      1999-07-12  
   last obs. used      2020-05-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .469  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 19:57:58  

Additional Information
 Earth MOID = 1.69383 au 
 Jupiter MOID = 1.97614 au 
 T_jup = 2.980 
[ 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 13.1   n/a MPO469026  
diameter diameter 16.030 km 0.229 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.052   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

101890 (1999 NK55)          Discovered 1999-Jul-12 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1999 NK55 = 2000 XD43 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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