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85188 (1991 PK12)
Classification: Main-belt Asteroid          SPK-ID: 2085188
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1754987153627717 4.017e-08  
a 2.786955143231769 1.2534e-08 au
q 2.297848095820924 1.1138e-07 au
i 8.020742383257287 3.9436e-06 deg
node 237.8497458992808 3.0002e-05 deg
peri 108.1266708149193 3.2057e-05 deg
M 64.78461574172579 1.0024e-05 deg
tp 2458694.682184818376
(2019-Jul-30.18218482)
4.7347e-05 TDB
period 1699.391316980155
4.65
1.1464e-05
3.139e-08
d
yr
n .2118405551463718 1.429e-09 deg/d
Q 3.276062190642614 1.4733e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1446  
   data-arc span      23861 days (65.33 yr)  
   first obs. used      1954-10-06  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50856  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 20:27:55  

Additional Information
 Earth MOID = 1.30679 au 
 Jupiter MOID = 2.23476 au 
 T_jup = 3.294 
[ 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 14.2   n/a MPO502664  
diameter diameter 3.813 km 0.451 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.305   0.102 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

85188 (1991 PK12)          Discovered 1991-Aug-07 by Holt, H. E. at Palomar
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ show close-approach data ]
Alternate Designations
 1991 PK12 = 2000 LC20 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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