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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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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2373384180048153 3.6663e-08  
a 2.594610243450399 6.3125e-09 au
q 1.978809552930793 9.4325e-08 au
i 7.580297942386918 4.1549e-06 deg
node 215.3717883477259 2.3222e-05 deg
peri 173.8634732465145 2.4149e-05 deg
M 280.747293319662 8.5082e-06 deg
tp 2459536.561082522536
(2021-Nov-18.06108252)
3.6788e-05 TDB
period 1526.534484129203
4.18
5.5709e-06
1.525e-08
d
yr
n .2358282788517278 8.6063e-10 deg/d
Q 3.210410933970005 7.8107e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3065  
   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      .4141  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-23 18:13:31  

Additional Information
 Earth MOID = .983165 au 
 Jupiter MOID = 2.23863 au 
 T_jup = 3.365 
[ 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 10.72   n/a E2021B10  
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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