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469761 (2005 QJ42)
Classification: Main-belt Asteroid          SPK-ID: 2469761
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 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2443238172203134 1.7225e-07  
a 3.110143666232786 3.2637e-08 au
q 2.350261493595212 5.3979e-07 au
i 13.64978777613593 1.6961e-05 deg
node 338.8625351074474 2.6639e-05 deg
peri 359.8934102814015 3.2322e-05 deg
M 248.2464555420385 1.4632e-05 deg
tp 2459622.410527797293
(2022-Feb-11.91052780)
8.6545e-05 TDB
period 2003.406613123091
5.49
3.1535e-05
8.634e-08
d
yr
n .1796939261565078 2.8285e-09 deg/d
Q 3.870025838870361 4.0611e-08 au
  Orbit Determination Parameters
   # obs. used (total)      172  
   data-arc span      4910 days (13.44 yr)  
   first obs. used      2005-08-26  
   last obs. used      2019-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57633  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 04:28:09  

Additional Information
 Earth MOID = 1.34144 au 
 Jupiter MOID = 1.5346 au 
 T_jup = 3.130 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457020.5 (2014-Dec-29.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2431420325905587 1.7203e-07  
q 2.354976268484663 5.388e-07 au
tp 2457619.062303792600
(2016-Aug-18.56230379)
7.4483e-05 TDB
node 338.8835433303699 2.6649e-05 deg
peri .1127360711994948 3.2431e-05 deg
i 13.64348499031893 1.6954e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      172  
   data-arc span      4910 days (13.44 yr)  
   first obs. used      2005-08-26  
   last obs. used      2019-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57633  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 04:28:09  

Additional Information
 Jupiter MOID = 1.5346 au 
 T_jup = 3.130 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.959303493934869E-14 -9.259175611215768E-14 -1.680978756239644E-12 -1.266803462142546E-13 -8.647681579851536E-13 -1.928541795427873E-13
q -9.259175611215768E-14 2.903033840258482E-13 5.641471972209787E-12 3.98270276228985E-13 2.734851164193782E-12 6.158136710619531E-13
tp -1.680978756239644E-12 5.641471972209787E-12 5.547774239279907E-9 1.248902860996261E-12 1.365383787965501E-9 -6.965481230252205E-12
node -1.266803462142546E-13 3.98270276228985E-13 1.248902860996261E-12 7.101849332097951E-10 -6.847645886761129E-10 6.661577317322848E-12
peri -8.647681579851536E-13 2.734851164193782E-12 1.365383787965501E-9 -6.847645886761129E-10 1.051772022492512E-9 -4.747625388666246E-12
i -1.928541795427873E-13 6.158136710619531E-13 -6.965481230252205E-12 6.661577317322848E-12 -4.747625388666246E-12 2.874297432300332E-10

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 16.2   n/a MPO437770  
diameter diameter 4.838 km 0.322 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.036   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

469761 (2005 QJ42)          Discovered 2005-Aug-26 by LONEOS at Anderson Mesa
Reference: Last Updated: 2016-08-22

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