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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 110 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1583402102828448 1.7914e-08  
a 3.047066650754788 8.4238e-09 au
q 2.564593476528431 5.6861e-08 au
i 3.87932882810079 1.0973e-06 deg
node 263.6020271798033 1.0932e-05 deg
peri 173.1873297471817 1.3328e-05 deg
M 234.1409467446804 9.8142e-06 deg
tp 2460075.708821125736
(2023-May-11.20882113)
5.4519e-05 TDB
period 1942.769862643394
5.32
8.0563e-06
2.206e-08
d
yr
n .1853024421071535 7.6842e-10 deg/d
Q 3.529539824981145 9.7576e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3180  
   data-arc span      51691 days (141.52 yr)  
   first obs. used      1880-01-30  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43837  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 06:20:42  

Additional Information
 Earth MOID = 1.57986 au 
 Jupiter MOID = 1.73202 au 
 T_jup = 3.215 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456138.5 (2012-Jul-30.0) TDB
Reference: JPL 110 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1630754134554126 1.7958e-08  
q 2.547204195322658 5.7534e-08 au
tp 2456202.226064615582
(2012-Oct-01.72606462)
4.6344e-05 TDB
node 263.6519730410403 1.0911e-05 deg
peri 173.7806110491263 1.3181e-05 deg
i 3.885421296887272 1.0973e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3180  
   data-arc span      51691 days (141.52 yr)  
   first obs. used      1880-01-30  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43837  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 06:20:42  

Additional Information
 Jupiter MOID = 1.73202 au 
 T_jup = 3.215 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.22481509648703E-16 -1.025433209266176E-15 -1.742955869860841E-13 -7.692459315086162E-14 6.156794921756567E-14 -4.908306889173802E-15
q -1.025433209266176E-15 3.310203351997943E-15 6.327256542554883E-13 2.394950185613334E-13 -1.744133991041299E-13 1.560532043144838E-14
tp -1.742955869860841E-13 6.327256542554883E-13 2.147791934998024E-9 1.370943321391091E-11 3.122662531815992E-10 2.613750521244132E-12
node -7.692459315086162E-14 2.394950185613334E-13 1.370943321391091E-11 1.190495422131541E-10 -1.208643374659396E-10 9.045512940542574E-12
peri 6.156794921756567E-14 -1.744133991041299E-13 3.122662531815992E-10 -1.208643374659396E-10 1.737333703888484E-10 -9.140857169144829E-12
i -4.908306889173802E-15 1.560532043144838E-14 2.613750521244132E-12 9.045512940542574E-12 -9.140857169144829E-12 1.203990618604279E-12

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 8.04   n/a E2021B10 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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