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666 Desdemona (A908 OG)
Classification: Main-belt Asteroid          SPK-ID: 2000666
[ 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 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2376867077462521 3.6656e-08  
a 2.593245467116613 6.3984e-09 au
q 1.976865489659773 9.4188e-08 au
i 7.583643686788832 4.1568e-06 deg
node 215.4026963319046 2.3212e-05 deg
peri 173.9551083788558 2.4136e-05 deg
M 233.4504129758772 8.4256e-06 deg
tp 2459536.694184670831
(2021-Nov-18.19418467)		 3.6829e-05 TDB
period 1525.330196808179
4.18		 5.6452e-06
1.546e-08		 d
yr
n .2360144713277924 8.7348e-10 deg/d
Q 3.209625444573452 7.9192e-09 au
   Orbit Determination Parameters
   # obs. used (total)      3064  
   data-arc span      40994 days (112.24 yr)  
   first obs. used      1908-07-23  
   last obs. used      2020-10-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41379  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:27:07  

Additional Information
 Earth MOID = .982426 au 
 Jupiter MOID = 2.238 au 
 T_jup = 3.366 
[ 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 10.7   n/a MPO384750  
diameter diameter 32.741 km 0.368 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 14.607 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Marciniak, A.; Pilcher, F.; Oszkiewicz, D.; Santana-Ros, T.; et al. (2015) Planet. Space Sci. 118, 256-266.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.095   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

666 Desdemona (A908 OG)          Discovered 1908-Jul-23 by Kopff, A. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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