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27681 (1981 EG10)
Classification: Main-belt Asteroid          SPK-ID: 2027681
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05924584181083874 3.8189e-08  
a 2.744649085202481 1.2052e-08 au
q 2.582040039674311 1.0825e-07 au
i 3.995898862737849 3.8537e-06 deg
node 280.5111332550952 6.9051e-05 deg
peri 116.58974598731 8.0434e-05 deg
M 359.8299331892089 4.12e-05 deg
tp 2459001.284595355007
(2020-May-31.78459535)
0.00019008 TDB
period 1660.843326740642
4.55
1.0939e-05
2.995e-08
d
yr
n .2167573510419492 1.4277e-09 deg/d
Q 2.90725813073065 1.2766e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1328  
   data-arc span      14215 days (38.92 yr)  
   first obs. used      1981-02-13  
   last obs. used      2020-01-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53347  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 01:08:24  

Additional Information
 Earth MOID = 1.59226 au 
 Jupiter MOID = 2.35526 au 
 T_jup = 3.342 
[ 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 14.4   n/a MPO358888  
diameter diameter 7.165 km 0.083 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.055   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

27681 (1981 EG10)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20010902/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1981 EG10 = 1997 WL50 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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