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JPL Small-Body Database Browser
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11902 (1991 PZ12)
Classification: Main-belt Asteroid          SPK-ID: 2011902
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1320464246979533 4.6329e-08  
a 2.431671141167141 9.8882e-09 au
q 2.110577660934828 1.1106e-07 au
i 5.552232710287775 4.3823e-06 deg
node 322.0189342678026 4.3056e-05 deg
peri 80.92376212078568 4.7801e-05 deg
M 153.7249239981043 1.7619e-05 deg
tp 2458409.078002047114
(2018-Oct-17.57800205)
6.8373e-05 TDB
period 1385.01886177979
3.79
8.4481e-06
2.313e-08
d
yr
n .2599242580259084 1.5854e-09 deg/d
Q 2.752764621399455 1.1194e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1490  
   data-arc span      12859 days (35.21 yr)  
   first obs. used      1984-11-20  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51536  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 20:11:36  

Additional Information
 Earth MOID = 1.12753 au 
 Jupiter MOID = 2.63711 au 
 T_jup = 3.489 
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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 14.5   n/a MPO467803  
diameter diameter 3.504 km 0.222 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.361   0.090 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

11902 (1991 PZ12)          Discovered 1991-Aug-05 by Holt, H. E. at Palomar
Reference: 19991026/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1991 PZ12 = 1984 WH1 = 1984 YF3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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