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142 Polana
Classification: Main-belt Asteroid          SPK-ID: 2000142
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1343508254334885 3.6671e-08  
a 2.418316819500218 8.6013e-09 AU
q 2.093413958640675 8.9468e-08 AU
i 2.238324661080765 3.9261e-06 deg
node 291.2770242583967 0.00010862 deg
peri 291.8965644536999 0.00010961 deg
M 343.8109176525496 1.7004e-05 deg
tp 2457062.271472325554
(2015-Feb-08.77147233)
6.4957e-05 JED
period 1373.62511104291
3.76
7.3284e-06
2.006e-08
d
yr
n .2620802408938737 1.3982e-09 deg/d
Q 2.743219680359762 9.7569e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      1887  
   data-arc span      42427 days (116.16 yr)  
   first obs. used      1898-03-27  
   last obs. used      2014-05-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55069  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-16 13:09:21  

Additional Information
 Earth MOID = 1.08737 AU 
 T_jup = 3.502 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.27 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6
diameter diameter 55.29 km 1.6 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6
rotation period rot_per 9.764 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Published Reference List:
[Dotto, E.; Rotundi, A.; De Sanctis, M.C. (1992) in Physical Properties of Small Solar System Bodies. A. Brahic, J.-C. Gerard, J. Surdej, eds. Universite de Liege, Institut d'Astrophysique, Liege, p. 211.]
[Barucci, M.A.; Di Martino, M.; Dotto, E.; Fulchignoni, M.; et al. (1994) Icarus 109, 267-273.]
geometric albedo albedo 0.0451   0.003 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6
B-V BV .621 mag .022 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=7; phase (min.=1.32, mean=10.93, max.=25.85) deg.
U-B UB .236 mag .035 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=7; phase (min.=1.32, mean=10.93, max.=25.85) deg.
Tholen spectral type spec_T F   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B B   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

142 Polana          Discovered 1875-Jan-28 by Palisa, J. at Pola
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1954 BH = 1956 XZ = 1963 SA = A923 WA 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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