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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1048296502477152 4.3643e-08  
a 3.023885284188365 1.6376e-08 AU
q 2.706892447457686 1.31e-07 AU
i 8.99766680147493 5.3441e-06 deg
node 302.9257980251057 3.2513e-05 deg
peri 87.90597003017446 4.0953e-05 deg
M 100.7151150498104 2.4499e-05 deg
tp 2456463.173145167253
(2013-Jun-19.67314517)
0.00013013 JED
period 1920.641878273393
5.26
1.5602e-05
4.272e-08
d
yr
n .1874373375236567 1.5226e-09 deg/d
Q 3.340878120919044 1.8092e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1371  
   data-arc span      31625 days (86.58 yr)  
   first obs. used      1928-08-15  
   last obs. used      2015-03-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53352  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 16:03:38  

Additional Information
 Earth MOID = 1.73112 AU 
 T_jup = 3.218 
[ 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-Feb); 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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