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945 Barcelona (1921 JB)
Classification: Main-belt Asteroid          SPK-ID: 2000945
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1636478728880055 5.4931e-08  
a 2.635007556295408 1.2063e-08 au
q 2.203794174663843 1.4512e-07 au
i 32.89646744001632 6.7388e-06 deg
node 318.3002784256347 9.9358e-06 deg
peri 162.1088229153252 2.1729e-05 deg
M 69.18126289338711 1.8119e-05 deg
tp 2457100.267841035447
(2015-Mar-18.76784104)
7.8097e-05 JED
period 1562.324431599391
4.28
1.0729e-05
2.937e-08
d
yr
n .2304258915233495 1.5824e-09 deg/d
Q 3.066220937926973 1.4037e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1074  
   data-arc span      33733 days (92.36 yr)  
   first obs. used      1923-08-06  
   last obs. used      2015-12-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .47961  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 12:36:15  

Additional Information
 Earth MOID = 1.22782 au 
 Jupiter MOID = 2.02037 au 
 T_jup = 3.154 
[ 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 10.13 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 4
diameter diameter 25.47 km 1.2 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 4
rotation period rot_per 7.36 h n/a LCDB (Rev. 2015-December); Warner et al., 2009 Published Reference List:
[Harris, A.W.; Young, J.W. (1989) Icarus 81, 314-364.]
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.2416   0.024 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 4
B-V BV .809 mag .022 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=1; phase=1.32 deg.
U-B UB .389 mag .038 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=1; phase=1.32 deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices
SMASSII spectral type spec_B Sq   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)

945 Barcelona (1921 JB)          Discovered 1921-Feb-03 by Comas Sola, J. at Barcelona
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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