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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2365256615087501 4.6182e-08  
a 2.315279534964509 1.5193e-08 au
q 1.767656511379358 1.0309e-07 au
i 6.59657225378162 6.3363e-06 deg
node 302.6743866611039 4.3069e-05 deg
peri 298.6392519077359 4.5607e-05 deg
M 268.8580568006179 1.8931e-05 deg
tp 2457926.276204635313
(2017-Jun-21.77620464)
6.9121e-05 JED
period 1286.777849492983
3.52
1.2665e-05
3.467e-08
d
yr
n .2797685708856795 2.7537e-09 deg/d
Q 2.862902558549661 1.8786e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1221  
   data-arc span      13906 days (38.07 yr)  
   first obs. used      1978-03-05  
   last obs. used      2016-03-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51678  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:24:58  

Additional Information
 Earth MOID = .766153 au 
 Jupiter MOID = 2.20219 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 13.7 mag n/a MPO347653  

16405 (1985 DA2)          Discovered 1985-Feb-20 by Debehogne, H. at La Silla
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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