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JPL Small-Body Database Browser
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27689 (1981 EU25)
Classification: Main-belt Asteroid          SPK-ID: 2027689
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2154019137974349 4.1335e-08  
a 2.438884546120573 8.9122e-09 au
q 1.913544147355214 1.0245e-07 au
i 4.973309824149605 5.3233e-06 deg
node 171.1179705440989 3.9027e-05 deg
peri 125.6792809458506 4.042e-05 deg
M 269.6898052929986 9.4693e-06 deg
tp 2458949.495291308949
(2020-Apr-09.99529131)
3.6747e-05 TDB
period 1391.186291634485
3.81
7.6255e-06
2.088e-08
d
yr
n .2587719575478573 1.4184e-09 deg/d
Q 2.964224944885934 1.0832e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1336  
   data-arc span      14884 days (40.75 yr)  
   first obs. used      1978-08-08  
   last obs. used      2019-05-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53881  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 03:28:39  

Additional Information
 Earth MOID = .902301 au 
 Jupiter MOID = 2.2697 au 
 T_jup = 3.466 
[ 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 MPO439292  

27689 (1981 EU25)          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 EU25 = 1978 PD2 = 1997 QA5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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