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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1628964491321853 5.6087e-08  
a 2.634997067050655 1.0734e-08 au
q 2.205765401354381 1.4871e-07 au
i 32.89222176389368 6.5973e-06 deg
node 318.2872240561242 8.8528e-06 deg
peri 161.9324813392894 1.8035e-05 deg
M 78.02353380026369 1.6477e-05 deg
tp 2458661.896263243782
(2019-Jun-27.39626324)
7.0791e-05 TDB
period 1562.315102828967
4.28
9.5462e-06
2.614e-08
d
yr
n .2304272674239203 1.408e-09 deg/d
Q 3.06422873274693 1.2482e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2110  
   data-arc span      35458 days (97.08 yr)  
   first obs. used      1923-08-06  
   last obs. used      2020-09-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .3525  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:24:06  

Additional Information
 Earth MOID = 1.22991 au 
 Jupiter MOID = 2.01543 au 
 T_jup = 3.154 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.0   n/a MPO502162 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-August); 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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