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1112 Polonia (1928 PE)
Classification: Main-belt Asteroid          SPK-ID: 2001112
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1063883950209507 4.3457e-08  
a 3.019410451780716 1.5806e-08 au
q 2.698180219906281 1.2998e-07 au
i 8.991600812239103 5.2836e-06 deg
node 302.8797888735801 3.2094e-05 deg
peri 87.52236581785169 4.0153e-05 deg
M 176.1573427404901 2.4114e-05 deg
tp 2456462.765471182848
(2013-Jun-19.26547118)
0.00012681 JED
period 1916.380124281814
5.25
1.5048e-05
4.12e-08
d
yr
n .18785417122551 1.4751e-09 deg/d
Q 3.34064068365515 1.7488e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1410  
   data-arc span      31898 days (87.33 yr)  
   first obs. used      1928-08-15  
   last obs. used      2015-12-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53561  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 12:37:08  

Additional Information
 Earth MOID = 1.721 au 
 Jupiter MOID = 2.12435 au 
 T_jup = 3.220 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.05 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 13
diameter diameter 35.76 km 1.6 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 13
rotation period rot_per 82.5 h n/a LCDB (Rev. 2015-December); 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 Bul. 35, 67-71.]
geometric albedo albedo 0.1319   0.012 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 13
B-V BV .797 mag .027 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=3; phase (min.=1.50, mean=6.47, max.=9.27) deg.
U-B UB .447 mag .034 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #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

[ show close-approach data ]
Alternate Designations
 1928 PE = 1933 PA = A908 XA 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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