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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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .236269452985376 4.809e-08  
a 2.31562172243379 1.6255e-08 AU
q 1.768511044753304 1.0697e-07 AU
i 6.596599648976622 7.3441e-06 deg
node 302.6803503086753 4.8877e-05 deg
peri 298.6984839884068 5.1712e-05 deg
M 100.9114947964916 1.9258e-05 deg
tp 2456639.723710251485
(2013-Dec-13.22371025)
6.8093e-05 JED
period 1287.063129640418
3.52
1.3553e-05
3.711e-08
d
yr
n .279706559615749 2.9453e-09 deg/d
Q 2.862732400114275 2.0096e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1077  
   data-arc span      13470 days (36.88 yr)  
   first obs. used      1978-03-05  
   last obs. used      2015-01-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .47646  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Mar-09 14:46:26  

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
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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