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JPL Small-Body Database Browser
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211 Isolda
Classification: Main-belt Asteroid          SPK-ID: 2000211
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 98 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1601537387471348 3.5168e-08  
a 3.041964855541305 9.394e-09 au
q 2.554782810788977 1.0717e-07 au
i 3.88596922840714 4.0215e-06 deg
node 263.6304359284481 6.8585e-05 deg
peri 173.390198430019 7.0118e-05 deg
M 160.4226984066738 1.4432e-05 deg
tp 2458136.938977987181
(2018-Jan-18.43897799)
7.6766e-05 TDB
period 1937.892648685692
5.31
8.9767e-06
2.458e-08
d
yr
n .1857688041926148 8.6052e-10 deg/d
Q 3.529146900293633 1.0898e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2484  
   data-arc span      51109 days (139.93 yr)  
   first obs. used      1880-02-01  
   last obs. used      2020-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48483  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 17:19:27  

Additional Information
 Earth MOID = 1.57021 au 
 Jupiter MOID = 1.73114 au 
 T_jup = 3.217 
[ 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 8.0   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. 2019-August); 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          Discovered 1879-Dec-10 by Palisa, J. at Pola
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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