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39656 (1995 US11)
Classification: Main-belt Asteroid          SPK-ID: 2039656
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2790284290940804 5.5268e-08  
a 2.6251786979017 1.6272e-08 au
q 1.892679209734945 1.4848e-07 au
i 12.22477391973494 6.3401e-06 deg
node 11.534701076186 2.2258e-05 deg
peri 313.7957710238674 2.3661e-05 deg
M 309.8276896339451 1.0461e-05 deg
tp 2459217.020157090218
(2021-Jan-02.52015709)
4.636e-05 TDB
period 1553.591133909896
4.25
1.4445e-05
3.955e-08
d
yr
n .2317211988034421 2.1545e-09 deg/d
Q 3.357678186068455 2.0813e-08 au
  Orbit Determination Parameters
   # obs. used (total)      638  
   data-arc span      15182 days (41.57 yr)  
   first obs. used      1978-10-02  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56734  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 08:45:03  

Additional Information
 Earth MOID = .904691 au 
 Jupiter MOID = 2.09892 au 
 T_jup = 3.315 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456763.5 (2014-Apr-16.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2763418122881544 5.5067e-08  
q 1.902818015375145 1.477e-07 au
tp 2456107.418808335307
(2012-Jun-28.91880834)
3.7132e-05 TDB
node 11.65271985245459 2.2305e-05 deg
peri 313.6391905090345 2.3746e-05 deg
i 12.20104070626477 6.328e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      638  
   data-arc span      15182 days (41.57 yr)  
   first obs. used      1978-10-02  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56734  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 08:45:03  

Additional Information
 Jupiter MOID = 2.09892 au 
 T_jup = 3.315 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.032351127727271E-15 -8.108211020233629E-15 7.707407212854757E-13 -5.398425643058545E-15 1.317536102411505E-13 -1.344349917152401E-16
q -8.108211020233629E-15 2.181638526183888E-14 -2.035624661290415E-12 1.521072948366732E-14 -3.399656005533066E-13 1.731673424499069E-16
tp 7.707407212854757E-13 -2.035624661290415E-12 1.378776969890975E-9 1.461896570437048E-12 3.216130752367089E-10 -2.400183710978461E-12
node -5.398425643058545E-15 1.521072948366732E-14 1.461896570437048E-12 4.974949552413043E-10 -4.850461320528696E-10 -3.554069872685346E-11
peri 1.317536102411505E-13 -3.399656005533066E-13 3.216130752367089E-10 -4.850461320528696E-10 5.638677388832018E-10 3.42834029590854E-11
i -1.344349917152401E-16 1.731673424499069E-16 -2.400183710978461E-12 -3.554069872685346E-11 3.42834029590854E-11 4.004392574571452E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.7   n/a MPO436048  
diameter diameter 6.236 km 0.390 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.060   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

39656 (1995 US11)          Discovered 1995-Oct-17 by Spacewatch at Kitt Peak
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1995 US11 = 1978 TH8 = 1978 TU6 = 1978 UP5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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