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85187 (1991 PC12)
Classification: Main-belt Asteroid          SPK-ID: 2085187
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3637820768027632 3.3596e-08  
a 2.685766245829564 1.2425e-08 au
q 1.708732623114925 9.2533e-08 au
i 11.82085384396326 4.4799e-06 deg
node 186.4557299668788 2.0557e-05 deg
peri 101.3919662554454 2.1451e-05 deg
M 220.5763514526217 7.0906e-06 deg
tp 2459623.136658481626
(2022-Feb-12.63665848)
3.424e-05 TDB
period 1607.68420127247
4.40
1.1156e-05
3.054e-08
d
yr
n .2239245740643982 1.5539e-09 deg/d
Q 3.662799868544204 1.6945e-08 au
  Orbit Determination Parameters
   # obs. used (total)      747  
   data-arc span      10399 days (28.47 yr)  
   first obs. used      1991-08-07  
   last obs. used      2020-01-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51975  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 20:27:54  

Additional Information
 Earth MOID = .741269 au 
 Jupiter MOID = 1.77694 au 
 T_jup = 3.247 
[ 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 15.2   n/a MPO351439  
diameter diameter 4.660 km 0.606 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.098   0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85187 (1991 PC12)          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 PC12 = 2000 RR5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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