Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
85188 (1991 PK12)
Classification: Main-belt Asteroid          SPK-ID: 2085188
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1755712734076 3.8545e-08  
a 2.787492241866823 1.2076e-08 au
q 2.298088679348459 1.0606e-07 au
i 8.019714229790038 3.5808e-06 deg
node 237.8449803310001 2.8011e-05 deg
peri 108.1901811283601 2.979e-05 deg
M 107.0762510733401 9.428e-06 deg
tp 2458694.897067173354
(2019-Jul-30.39706717)
4.4231e-05 TDB
period 1699.882597616561
4.65
1.1046e-05
3.024e-08
d
yr
n .2117793314107475 1.3762e-09 deg/d
Q 3.276895804385187 1.4196e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1696  
   data-arc span      24272 days (66.45 yr)  
   first obs. used      1954-10-06  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48798  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 08:06:14  

Additional Information
 Earth MOID = 1.3053 au 
 Jupiter MOID = 2.23458 au 
 T_jup = 3.294 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.24   n/a E2021B10  
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

Alternate Designations
 1991 PK12 = 2000 LC20 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jun-24 07:53 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin