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27690 (1981 EL27)
Classification: Main-belt Asteroid          SPK-ID: 2027690
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09280424588190457 2.9508e-08  
a 2.7032721282746 1.0706e-08 au
q 2.452396996996505 8.0691e-08 au
i 3.055058964499207 3.7729e-06 deg
node 189.1589589551219 6.2482e-05 deg
peri 241.7146429103419 6.7117e-05 deg
M 305.9959066761211 2.2565e-05 deg
tp 2458844.032684026564
(2019-Dec-26.53268403)
0.00010165 TDB
period 1623.428167264448
4.44
9.6442e-06
2.64e-08
d
yr
n .221752959114056 1.3174e-09 deg/d
Q 2.954147259552696 1.17e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1428  
   data-arc span      14177 days (38.81 yr)  
   first obs. used      1981-02-12  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55253  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 01:40:38  

Additional Information
 Earth MOID = 1.46831 au 
 Jupiter MOID = 2.27611 au 
 T_jup = 3.358 
[ 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 14.5   n/a MPO449166  
diameter diameter 3.852 km 0.373 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.207   0.053 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

27690 (1981 EL27)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20010902/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1981 EL27 = 1999 GE30 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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