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1112 Polonia (1928 PE)
Classification: Main-belt Asteroid          SPK-ID: 2001112
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 49 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1074272660347597 3.7589e-08  
a 3.019357470859827 1.138e-08 au
q 2.694996152583729 1.127e-07 au
i 8.992525837036572 4.1397e-06 deg
node 302.8486469171211 2.5337e-05 deg
peri 87.13042877822366 3.1723e-05 deg
M 117.1626948780766 1.9237e-05 deg
tp 2458376.826805064674
(2018-Sep-15.32680506)
0.00010172 TDB
period 1916.329685061979
5.25
1.0834e-05
2.966e-08
d
yr
n .187859115686744 1.0621e-09 deg/d
Q 3.343718789135925 1.2603e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2803  
   data-arc span      33494 days (91.70 yr)  
   first obs. used      1928-08-15  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40521  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:19:11  

Additional Information
 Earth MOID = 1.71919 au 
 Jupiter MOID = 2.11899 au 
 T_jup = 3.219 
[ 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 10.0   n/a MPO502163 IRAS observations used: 13
diameter diameter 39.661 km 0.334 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 82.5 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Warner, B.D. (2008) Minor Planet Bull. 35, 67-71.]
geometric albedo albedo 0.097   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.797   0.027 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=1.50, mean=6.47, max.=9.27) deg.
U-B UB 0.447   0.034 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=1.50, mean=6.47, max.=9.27) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices; used ground-based radiometric albedo

1112 Polonia (1928 PE)          Discovered 1928-Aug-15 by Shajn, P. at Simeis
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1928 PE = 1933 PA = A908 XA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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