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172204 (2002 QR52)
Classification: Main-belt Asteroid          SPK-ID: 2172204
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .009374625912749859 6.0152e-08  
a 2.61020803875302 2.0784e-08 au
q 2.585738314835258 1.5152e-07 au
i 9.245768933742541 5.109e-06 deg
node 137.2120507498669 3.3915e-05 deg
peri 79.45224468446904 0.00026371 deg
M 192.882469505909 0.00026141 deg
tp 2459715.540465091375
(2022-May-16.04046509)
0.0011182 TDB
period 1540.32055567023
4.22
1.8397e-05
5.037e-08
d
yr
n .2337175847421938 2.7914e-09 deg/d
Q 2.634677762670782 2.0978e-08 au
  Orbit Determination Parameters
   # obs. used (total)      310  
   data-arc span      6246 days (17.10 yr)  
   first obs. used      2002-08-18  
   last obs. used      2019-09-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57055  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 19:39:34  

Additional Information
 Earth MOID = 1.59045 au 
 Jupiter MOID = 2.35168 au 
 T_jup = 3.392 
[ 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 16.0   n/a MPO449894  
diameter diameter 4.671 km 0.335 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.042   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

172204 (2002 QR52)          Discovered 2002-Aug-29 by Hoenig, S. F. at Palomar
Reference: 20071224/Numbers.arcLast Updated: 2007-12-22

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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