Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1345307112994327 3.6691e-08  
a 2.41911166203733 8.7204e-09 AU
q 2.093666849430695 8.9526e-08 AU
i 2.238481043671136 3.9262e-06 deg
node 291.281528557896 0.00010859 deg
peri 291.782972681808 0.00010958 deg
M 291.5147354264552 1.6895e-05 deg
tp 2457061.942950836041
(2015-Feb-08.44295084)
6.4822e-05 JED
period 1374.302382958629
3.76
7.4311e-06
2.035e-08
d
yr
n .2619510847568959 1.4164e-09 deg/d
Q 2.744556474643965 9.8936e-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 = 1.08634 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 Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) 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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2014-Jul-28 14:25 UT
(server date/time)  
NASA Home Page
Site Manager:   Donald K. Yeomans
Webmaster  Alan B. Chamberlin