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90688 (1981 ED30)
Classification: Outer Main-belt Asteroid          SPK-ID: 2090688
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04526299676983964 4.3031e-08  
a 3.50338592703939 3.9731e-08 au
q 3.344812181140304 1.4738e-07 au
i 9.592097225826969 4.5448e-06 deg
node 264.0195314135923 3.5426e-05 deg
peri 198.5277377934825 7.4505e-05 deg
M 64.62168236315027 6.5354e-05 deg
tp 2458570.561677120302
(2019-Mar-28.06167712)
0.00043387 TDB
period 2395.137213650622
6.56
4.0744e-05
1.116e-07
d
yr
n .1503045411963246 2.5569e-09 deg/d
Q 3.661959672938476 4.153e-08 au
  Orbit Determination Parameters
   # obs. used (total)      580  
   data-arc span      15156 days (41.49 yr)  
   first obs. used      1978-10-26  
   last obs. used      2020-04-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55761  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 16:33:56  

Additional Information
 Earth MOID = 2.36324 au 
 Jupiter MOID = 1.53696 au 
 T_jup = 3.102 
[ 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 14.0   n/a MPO436406  
diameter diameter 8.705 km 0.301 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.476 h n/a LCDB (Rev. 2019-August); 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.070   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

90688 (1981 ED30)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1981 ED30 = 2000 CC42 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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