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16405 (1985 DA2)
Classification: Main-belt Asteroid          SPK-ID: 2016405
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2362223136863342 6.6702e-08  
a 2.31586695381043 1.9704e-08 AU
q 1.768807503791608 1.5748e-07 AU
i 6.596648531883895 8.4526e-06 deg
node 302.6813002662685 5.3905e-05 deg
peri 298.7252550125305 5.6655e-05 deg
M 44.95245259625074 1.9602e-05 deg
tp 2456639.761568448536
(2013-Dec-13.26156845)
6.9556e-05 JED
period 1287.267590897883
3.52
1.6429e-05
4.498e-08
d
yr
n .2796621328350977 3.5692e-09 deg/d
Q 2.862926403829253 2.4359e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      968  
   data-arc span      13266 days (36.32 yr)  
   first obs. used      1978-03-05  
   last obs. used      2014-06-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .47655  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:36:26  

Additional Information
 Earth MOID = .767446 AU 
 T_jup = 3.535 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.6 mag n/a MPO263493  

16405 (1985 DA2)          Discovered 1985-Feb-20 by Debehogne, H. at La Silla (809)
Reference: 20000913/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1985 DA2 = 1978 EG8 = 1999 DW 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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