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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .163565133332827 5.4439e-08  
a 2.634682222949719 1.1889e-08 au
q 2.203740073863319 1.4355e-07 au
i 32.89640824403421 6.6952e-06 deg
node 318.2978957989194 9.9333e-06 deg
peri 162.06704834042 2.1673e-05 deg
M 115.3272503417864 1.8205e-05 deg
tp 2457100.096630482886
(2015-Mar-18.59663048)
7.8049e-05 JED
period 1562.035100050325
4.28
1.0573e-05
2.895e-08
d
yr
n .230468572689821 1.56e-09 deg/d
Q 3.065624372036118 1.3834e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1102  
   data-arc span      33802 days (92.54 yr)  
   first obs. used      1923-08-06  
   last obs. used      2016-02-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48373  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Mar-24 15:28:03  

Additional Information
 Earth MOID = 1.22643 au 
 Jupiter MOID = 2.02013 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. 2016-February); 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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