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27691 (1981 EA29)
Classification: Main-belt Asteroid          SPK-ID: 2027691
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2096284641797587 3.3535e-08  
a 2.725164028049108 1.1196e-08 au
q 2.153892078211249 9.4901e-08 au
i 8.453109358263278 4.2132e-06 deg
node 194.112645878306 2.3356e-05 deg
peri 203.4341437217467 2.5281e-05 deg
M 18.33768253068176 9.2265e-06 deg
tp 2458916.799250413256
(2020-Mar-08.29925041)
4.1975e-05 TDB
period 1643.188543634779
4.50
1.0126e-05
2.772e-08
d
yr
n .2190862402215085 1.3501e-09 deg/d
Q 3.296435977886967 1.3543e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1408  
   data-arc span      15181 days (41.56 yr)  
   first obs. used      1978-07-05  
   last obs. used      2020-01-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55044  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 01:08:41  

Additional Information
 Earth MOID = 1.16361 au 
 Jupiter MOID = 2.14357 au 
 T_jup = 3.309 
[ 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 14.3   n/a MPO502365  
diameter diameter 6.283 km 1.239 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
geometric albedo albedo 0.086   0.054 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  

27691 (1981 EA29)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20010902/Numbers.arcLast Updated: 2004-04-19

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