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109461 (2001 QR212)
Classification: Main-belt Asteroid          SPK-ID: 2109461
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07812187762318303 4.847e-08  
a 2.985104117753565 2.2192e-08 au
q 2.751902179173961 1.4717e-07 au
i 9.81121471363981 5.4561e-06 deg
node 346.9969635415638 2.8406e-05 deg
peri 312.5345083305061 4.3164e-05 deg
M 195.8412256374959 3.3243e-05 deg
tp 2459459.512042645049
(2021-Sep-02.01204264)
0.00017661 TDB
period 1883.812403894585
5.16
2.1007e-05
5.751e-08
d
yr
n .1911018311885715 2.1311e-09 deg/d
Q 3.218306056333169 2.3926e-08 au
  Orbit Determination Parameters
   # obs. used (total)      764  
   data-arc span      6438 days (17.63 yr)  
   first obs. used      2001-08-16  
   last obs. used      2019-04-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .548  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 07:51:37  

Additional Information
 Earth MOID = 1.74748 au 
 Jupiter MOID = 2.05985 au 
 T_jup = 3.231 
[ 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 14.5   n/a MPO325223  
diameter diameter 4.154 km 0.186 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.218   0.033 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

109461 (2001 QR212)          Discovered 2001-Aug-23 by LONEOS at Anderson Mesa
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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