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39646 (1995 SK4)
Classification: Main-belt Asteroid          SPK-ID: 2039646
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3062200416556367 4.3535e-08  
a 2.757901389426974 1.495e-08 au
q 1.913376711074507 1.1866e-07 au
i 34.35408429100917 5.9397e-06 deg
node 160.7002558820145 8.9534e-06 deg
peri 234.3148252410803 1.2165e-05 deg
M 38.41509458161445 8.8602e-06 deg
tp 2458421.988609315932
(2018-Oct-30.48860932)
4.0722e-05 TDB
period 1672.886695872446
4.58
1.3603e-05
3.724e-08
d
yr
n .2151968814673682 1.7498e-09 deg/d
Q 3.60242606777944 1.9528e-08 au
  Orbit Determination Parameters
   # obs. used (total)      689  
   data-arc span      13664 days (37.41 yr)  
   first obs. used      1981-09-28  
   last obs. used      2019-02-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49842  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 02:07:47  

Additional Information
 Earth MOID = 1.02612 au 
 Jupiter MOID = 2.2261 au 
 T_jup = 3.031 
[ 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 14.4   n/a MPO468236  
diameter diameter 5.427 km 0.141 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.187   0.034 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

39646 (1995 SK4)          Discovered 1995-Sep-26 by Spahr, T. B. at Catalina Station
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

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