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211 Isolda (A879 XA)
Classification: Main-belt Asteroid          SPK-ID: 2000211
[ 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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 103 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1601537395449971 3.5123e-08  
a 3.041964853685142 9.1909e-09 au
q 2.554782806803016 1.0694e-07 au
i 3.885968349058265 3.9747e-06 deg
node 263.6303920047057 6.1317e-05 deg
peri 173.390249118703 6.2643e-05 deg
M 160.4226935085055 1.3492e-05 deg
tp 2458136.939005144591
(2018-Jan-18.43900514)		 7.1315e-05 TDB
period 1937.89264691198
5.31		 8.7827e-06
2.405e-08		 d
yr
n .185768804362645 8.4192e-10 deg/d
Q 3.529146900567267 1.0663e-08 au
   Orbit Determination Parameters
   # obs. used (total)      2883  
   data-arc span      51377 days (140.66 yr)  
   first obs. used      1880-02-01  
   last obs. used      2020-10-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45643  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:32:12  

Additional Information
 Earth MOID = 1.57021 au 
 Jupiter MOID = 1.73114 au 
 T_jup = 3.217 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455749.5 (2011-Jul-07.0) TDB
Reference: JPL 103 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1627543369140568 3.4953e-08  
q 2.544850680133377 1.0676e-07 au
tp 2456204.167318551840
(2012-Oct-03.66731855)		 6.8495e-05 TDB
node 263.7230914410331 6.1444e-05 deg
peri 174.2235411131827 6.2749e-05 deg
i 3.882800720614402 3.9735e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      2883  
   data-arc span      51377 days (140.66 yr)  
   first obs. used      1880-02-01  
   last obs. used      2020-10-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45643  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:32:12  

Additional Information
 Jupiter MOID = 1.73114 au 
 T_jup = 3.217 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.221688535457474E-15 -3.721614774088323E-15 -2.357508368101731E-13 1.632984142817206E-15 -5.871046710100687E-14 -4.292023601732549E-17
q -3.721614774088323E-15 1.139791018552684E-14 7.75740808153787E-13 -2.296080860059317E-15 1.829404624628804E-13 2.905437923849722E-16
tp -2.357508368101731E-13 7.75740808153787E-13 4.69162355555286E-9 -7.028791732669819E-12 8.942864796644826E-10 -4.957750423032813E-13
node 1.632984142817206E-15 -2.296080860059317E-15 -7.028791732669819E-12 3.775325566709773E-9 -3.76777424432064E-9 -1.765495644290673E-11
peri -5.871046710100687E-14 1.829404624628804E-13 8.942864796644826E-10 -3.76777424432064E-9 3.93740622492513E-9 1.748095441128566E-11
i -4.292023601732549E-17 2.905437923849722E-16 -4.957750423032813E-13 -1.765495644290673E-11 1.748095441128566E-11 1.578873110486079E-11

[ 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 8.0   n/a MPO473763 IRAS observations used: 58
magnitude slope G 0.12   n/a PDS3 (MPC 17258) Fit
diameter diameter 141.125 km 2.486 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 18.365 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Harris, A.W.; Young, J.W. (1989) Icarus 81, 314-364.]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.062   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.711   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=3.43, mean=6.84, max.=18.45) deg.
U-B UB 0.364   0.031 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=3.43, mean=6.84, max.=18.45) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B Ch   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)

211 Isolda (A879 XA)          Discovered 1879-Dec-10 by Palisa, J. at Pola
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A879 XA = 1950 FM = A912 AB = A912 BA 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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