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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2362694528286856 4.8094e-08  
a 2.315621722464233 1.6257e-08 AU
q 1.76851104513939 1.0699e-07 AU
i 6.596599510935106 7.3486e-06 deg
node 302.6803501501285 4.8877e-05 deg
peri 298.6984840489032 5.1714e-05 deg
M 100.9114948607365 1.9259e-05 deg
tp 2456639.723710014684
(2013-Dec-13.22371001)
6.8098e-05 JED
period 1287.0631296658
3.52
1.3554e-05
3.711e-08
d
yr
n .279706559610233 2.9455e-09 deg/d
Q 2.862732399789076 2.0098e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1064  
   data-arc span      13450 days (36.82 yr)  
   first obs. used      1978-03-05  
   last obs. used      2014-12-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .47873  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jan-08 02:31:21  

Additional Information
 Earth MOID = .768698 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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