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217 Eudora (A880 QA)
Classification: Main-belt Asteroid          SPK-ID: 2000217
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3105641621156353 2.295e-08  
a 2.866223480431665 8.1721e-09 au
q 1.976077186795245 6.7314e-08 au
i 10.52180025123382 6.4618e-07 deg
node 162.5742007378142 2.3972e-06 deg
peri 155.3218601015751 2.1333e-06 deg
M 314.0724140816083 2.5592e-06 deg
tp 2459426.617730876241
(2021-Jul-31.11773088)
1.3188e-05 TDB
period 1772.407181603012
4.85
7.5802e-06
2.075e-08
d
yr
n .2031135981261407 8.6867e-10 deg/d
Q 3.756369774068085 1.071e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3234  
   data-arc span      49465 days (135.43 yr)  
   first obs. used      1885-10-09  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42355  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 10:30:29  

Additional Information
 Earth MOID = .966842 au 
 Jupiter MOID = 1.63924 au 
 T_jup = 3.203 
[ 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 9.93   n/a E2021B10  
diameter diameter 65.392 km 0.293 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 25.272 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]
[Buchheim, R.K.; Roy, R.; Behrend, R. (2007) Minor Planet Bull. 34, 13-14.]
[Pilcher, F. (2010) Minor Planet Bull. 37, 148-149.]
[Pilcher, F. (2011) Minor Planet Bull. 38, 183-185.]
[Pilcher, F. (2013) Minor Planet Bull. 40, 85-87.]
[Durech, J.; Hanus, J. (2018) Astron. Astrophys. 620, A91.]
geometric albedo albedo 0.049   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
Tholen spectral type spec_T X   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a medium resolution spectrum published by Chapman and Gaffey (1979)

217 Eudora (A880 QA)          Discovered 1880-Aug-30 by Coggia, J. at Marseille
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A880 QA = A914 RA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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