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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 108 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1583402107049366 1.7938e-08  
a 3.047066649681148 8.6746e-09 au
q 2.564593474338649 5.7033e-08 au
i 3.879328810422018 1.0977e-06 deg
node 263.6020271876366 1.0933e-05 deg
peri 173.187329555927 1.3333e-05 deg
M 234.1409472282913 9.8632e-06 deg
tp 2460075.708818156908
(2023-May-11.20881816)
5.4847e-05 TDB
period 1942.769861616585
5.32
8.2962e-06
2.271e-08
d
yr
n .1853024422050911 7.9129e-10 deg/d
Q 3.529539825023646 1.0048e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3078  
   data-arc span      51643 days (141.39 yr)  
   first obs. used      1880-02-01  
   last obs. used      2021-06-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44362  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 10:42:23  

Additional Information
 Earth MOID = 1.57986 au 
 Jupiter MOID = 1.73202 au 
 T_jup = 3.215 
[ 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 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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