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234 Barbara (A883 PA)
Classification: Main-belt Asteroid          SPK-ID: 2000234
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 88 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2450961199240409 1.9843e-08  
a 2.38581295747333 4.2872e-09 au
q 1.801059458732116 4.7867e-08 au
i 15.37571120692669 6.7806e-07 deg
node 144.5018766002028 3.3148e-06 deg
peri 192.2285759296135 6.0839e-06 deg
M 85.16688919956802 3.713e-06 deg
tp 2458882.064630513437
(2020-Feb-02.56463051)
1.3579e-05 TDB
period 1346.024659260939
3.69
3.6281e-06
9.933e-09
d
yr
n .2674542383180892 7.209e-10 deg/d
Q 2.970566456214543 5.338e-09 au
  Orbit Determination Parameters
   # obs. used (total)      4944  
   data-arc span      50210 days (137.47 yr)  
   first obs. used      1883-09-24  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .37805  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 10:32:22  

Additional Information
 Earth MOID = .791406 au 
 Jupiter MOID = 2.41965 au 
 T_jup = 3.447 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.1   n/a MPO492751 IRAS observations used: 11
diameter diameter 45.476 km 0.245 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 26.4744 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Schober, H.J. (1981) Astron. Astrophys. 96, 302-305.]
[Behrend, R. (2008) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hamanowa, H.; Hamanowa, H. (2011) http://www2.ocn.ne.jp/~hamaten/astlcdata.htm]
[Pilcher, F. (2014) Minor Planet Bull. 41, 155-156.]
[Tanga, P.; Carry, B.; Colars, F.; Delbo, M.; et al. (2015) arXiv:1502.00460v1.]
[Franco, L.; Marchini, A.; Baj, G.; Papini, R.; et al. (2019) Minor Planet Bull. 46, 441-443.]
geometric albedo albedo 0.205   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.897   0.037 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=.76, mean=10.85, max.=15.90) deg.
U-B UB 0.488   0.028 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=.76, mean=10.85, max.=15.90) 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 Ld   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)

234 Barbara (A883 PA)          Discovered 1883-Aug-12 by Peters, C. H. F. at Clinton
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A883 PA = 1942 RL1 = 1953 RE = 1975 XP 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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