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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1634545687253748 5.5233e-08  
a 2.635071047716046 1.2118e-08 AU
q 2.204356646050898 1.4594e-07 AU
i 32.90062646715482 6.7469e-06 deg
node 318.3055368544074 1.0108e-05 deg
peri 162.3101792499691 2.1904e-05 deg
M 336.8667465168795 1.8364e-05 deg
tp 2457100.897092708904
(2015-Mar-19.39709271)
7.9887e-05 JED
period 1562.380899062805
4.28
1.0777e-05
2.951e-08
d
yr
n .2304175634865648 1.5894e-09 deg/d
Q 3.065785449381194 1.4099e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1047  
   data-arc span      33454 days (91.59 yr)  
   first obs. used      1923-08-06  
   last obs. used      2015-03-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .47838  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 16:02:44  

Additional Information
 Earth MOID = 1.22837 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-Feb); 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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