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210 Isabella (A879 VA)
Classification: Main-belt Asteroid          SPK-ID: 2000210
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 110 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1237520723628359 3.4455e-08  
a 2.721619662130125 8.2894e-09 au
q 2.38481358875808 9.3963e-08 au
i 5.259752829873314 4.005e-06 deg
node 32.56914006437921 4.2588e-05 deg
peri 14.80161927905498 4.5934e-05 deg
M 100.8878709672855 1.6902e-05 deg
tp 2458540.904218207501
(2019-Feb-26.40421821)
7.6868e-05 TDB
period 1639.983873769633
4.49
7.4925e-06
2.051e-08
d
yr
n .2195143536213631 1.0029e-09 deg/d
Q 3.058425735502168 9.3152e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2857  
   data-arc span      49497 days (135.52 yr)  
   first obs. used      1885-01-09  
   last obs. used      2020-07-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42811  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:32:12  

Additional Information
 Earth MOID = 1.39486 au 
 Jupiter MOID = 2.32017 au 
 T_jup = 3.341 
[ 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 9.5   n/a MPO502154 IRAS observations used: 6
diameter diameter 86.65 km 2.3 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6
rotation period rot_per 6.672 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
geometric albedo albedo 0.0436   0.002 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6
B-V BV 0.667   0.017 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=1.60, mean=14.61, max.=21.45) deg.
U-B UB 0.248   0.025 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=1.60, mean=14.61, max.=21.45) deg.
Tholen spectral type spec_T CF   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 4 color indices
SMASSII spectral type spec_B Cb   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)

210 Isabella (A879 VA)          Discovered 1879-Nov-12 by Palisa, J. at Pola
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A879 VA = 1953 EZ1 = 1962 BF 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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