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JPL Small-Body Database Browser
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945 Barcelona (A921 CB)
Classification: Main-belt Asteroid          SPK-ID: 2000945
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1631203318634534 6.454e-08  
a 2.635655457451702 1.1484e-08 au
q 2.205726464554458 1.7257e-07 au
i 32.88942694156958 6.9676e-06 deg
node 318.2862593574804 8.9392e-06 deg
peri 161.9735252474463 1.8144e-05 deg
M 345.8237058890754 1.6426e-05 deg
tp 2458662.044832847230
(2019-Jun-27.54483285)
7.1454e-05 TDB
period 1562.90068840548
4.28
1.0214e-05
2.796e-08
d
yr
n .2303409312381091 1.5054e-09 deg/d
Q 3.065584450348945 1.3357e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1937  
   data-arc span      35178 days (96.31 yr)  
   first obs. used      1923-08-06  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .35236  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 20:14:31  

Additional Information
 Earth MOID = 1.23024 au 
 Jupiter MOID = 2.0154 au 
 T_jup = 3.153 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456097.5 (2012-Jun-19.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1628516145761802 6.4738e-08  
q 2.20671965164445 1.7309e-07 au
tp 2455537.789105764918
(2010-Dec-07.28910577)
6.7182e-05 TDB
node 318.3109875848541 8.9379e-06 deg
peri 162.2234378187976 1.8098e-05 deg
i 32.89022523328525 6.9676e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1937  
   data-arc span      35178 days (96.31 yr)  
   first obs. used      1923-08-06  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .35236  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 20:14:31  

Additional Information
 Jupiter MOID = 2.0154 au 
 T_jup = 3.153 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.190958917371847E-15 -1.118904253995596E-14 4.150593299408708E-13 2.706990143278409E-15 2.384083141379072E-13 -1.359846514643794E-14
q -1.118904253995596E-14 2.995950442180582E-14 -1.05441607057457E-12 -7.971852601431816E-15 -6.215028752325351E-13 3.692306687754383E-14
tp 4.150593299408708E-13 -1.05441607057457E-12 4.513411767902277E-9 1.22652648702485E-12 1.064870309990898E-9 1.867492938059004E-11
node 2.706990143278409E-15 -7.971852601431816E-15 1.22652648702485E-12 7.98868626844472E-11 -6.61823350763114E-11 1.464641188508582E-12
peri 2.384083141379072E-13 -6.215028752325351E-13 1.064870309990898E-9 -6.61823350763114E-11 3.275269596498276E-10 2.722376297950702E-12
i -1.359846514643794E-14 3.692306687754383E-14 1.867492938059004E-11 1.464641188508582E-12 2.722376297950702E-12 4.854715800836444E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.13   n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 4
diameter diameter 25.618 km 0.949 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 7.36 h n/a LCDB (Rev. 2019-January); 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 0.239   0.040 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.809   0.022 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=1.32 deg.
U-B UB 0.389   0.038 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #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 (A921 CB)          Discovered 1921-Feb-03 by Comas Sola, J. at Barcelona
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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