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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1345065563182928 3.6208e-08  
a 2.418811360897016 8.4317e-09 au
q 2.093465374359195 8.8206e-08 au
i 2.238061335420873 3.9105e-06 deg
node 291.275399652929 0.0001076 deg
peri 291.9619842083807 0.00010858 deg
M 88.56329584503796 1.6748e-05 deg
tp 2457062.471984299900
(2015-Feb-08.97198430)
6.3551e-05 JED
period 1374.046488343896
3.76
7.1846e-06
1.967e-08
d
yr
n .2619998690392921 1.37e-09 deg/d
Q 2.744157347434837 9.5658e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1946  
   data-arc span      42971 days (117.65 yr)  
   first obs. used      1898-03-27  
   last obs. used      2015-11-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55099  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Nov-30 15:27:09  

Additional Information
 Earth MOID = 1.0852 au 
 Jupiter MOID = 2.2404 au 
 T_jup = 3.501 
[ 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 LCDB (Rev. 2015-December); Warner et al., 2009 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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