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108664 (2001 NT21)
Classification: Main-belt Asteroid          SPK-ID: 2108664
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1350491049063428 3.4659e-08  
a 2.356120393432072 9.3537e-09 au
q 2.037928443247491 8.4241e-08 au
i 4.068060896081898 4.3339e-06 deg
node 326.2743745185097 5.1441e-05 deg
peri 112.1571900669346 5.4555e-05 deg
M 345.8656718095573 1.9574e-05 deg
tp 2459052.364155983056
(2020-Jul-21.86415598)
7.1973e-05 TDB
period 1320.975139555993
3.62
7.8663e-06
2.154e-08
d
yr
n .2725259463406733 1.6229e-09 deg/d
Q 2.674312343616653 1.0617e-08 au
  Orbit Determination Parameters
   # obs. used (total)      906  
   data-arc span      7652 days (20.95 yr)  
   first obs. used      1998-12-14  
   last obs. used      2019-11-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5781  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 03:11:22  

Additional Information
 Earth MOID = 1.05762 au 
 Jupiter MOID = 2.54497 au 
 T_jup = 3.539 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.5   n/a MPO345028  
diameter diameter 1.961 km 0.450 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.382   0.097 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

108664 (2001 NT21)          Discovered 2001-Jul-14 by NEAT at Palomar
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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