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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 ]

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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 117 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1240685937038989 2.5048e-08  
a 2.720621249798012 7.1533e-09 au
q 2.383077597334629 6.7544e-08 au
i 5.260763601006387 8.6835e-07 deg
node 32.56515886963947 7.7445e-06 deg
peri 14.68201348145306 7.6406e-06 deg
M 187.9709197544851 4.9773e-06 deg
tp 2460179.749132010486
(2023-Aug-23.24913201)
2.4589e-05 TDB
period 1639.08152692182
4.49
6.4644e-06
1.77e-08
d
yr
n .2196352006212141 8.6622e-10 deg/d
Q 3.058164902261396 8.0408e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3354  
   data-arc span      49841 days (136.46 yr)  
   first obs. used      1885-01-09  
   last obs. used      2021-06-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4085  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 10:42:11  

Additional Information
 Earth MOID = 1.39254 au 
 Jupiter MOID = 2.32258 au 
 T_jup = 3.342 
[ 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 9.46   n/a MPCxxxxx 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. 2020-October); 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

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