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JPL Small-Body Database Browser
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172021 (2001 UQ204)
Classification: Main-belt Asteroid          SPK-ID: 2172021
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .006085439756769844 5.5835e-08  
a 3.158322537529912 3.7785e-08 au
q 3.139102755995325 1.7335e-07 au
i 16.18864035081566 7.7944e-06 deg
node 28.88857025995359 2.188e-05 deg
peri 264.3667349457709 0.00069223 deg
M 218.3500205964112 0.00069536 deg
tp 2459807.172331203248
(2022-Aug-15.67233120)
0.0039645 TDB
period 2050.138238324459
5.61
3.6791e-05
1.007e-07
d
yr
n .17559791494559 3.1512e-09 deg/d
Q 3.177542319064499 3.8015e-08 au
  Orbit Determination Parameters
   # obs. used (total)      399  
   data-arc span      9753 days (26.70 yr)  
   first obs. used      1993-04-25  
   last obs. used      2020-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57581  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 21:44:00  

Additional Information
 Earth MOID = 2.14681 au 
 Jupiter MOID = 1.80047 au 
 T_jup = 3.144 
[ 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 14.8   n/a MPO454179  
diameter diameter 6.930 km 0.192 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.053   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

172021 (2001 UQ204)          Discovered 2001-Oct-19 by NEAT at Palomar
Reference: 20071224/Numbers.arcLast Updated: 2007-12-22

[ show close-approach data ]
Alternate Designations
 2001 UQ204 = 2004 FJ45 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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