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160855 (2001 DH81)
Classification: Main-belt Asteroid          SPK-ID: 2160855
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1938643856656788 4.7908e-08  
a 2.575123002585526 1.2439e-08 au
q 2.075898363675725 1.2566e-07 au
i 13.63992058155337 3.8825e-06 deg
node 24.6391371852344 1.3596e-05 deg
peri 329.5533884793934 1.5796e-05 deg
M 109.9627112493386 7.5633e-06 deg
tp 2458739.460290641231
(2019-Sep-12.96029064)
3.0896e-05 TDB
period 1509.368889539409
4.13
1.0937e-05
2.994e-08
d
yr
n .2385102823404925 1.7282e-09 deg/d
Q 3.074347641495327 1.4851e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1310  
   data-arc span      7795 days (21.34 yr)  
   first obs. used      1999-11-01  
   last obs. used      2021-03-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47575  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 20:03:05  

Additional Information
 Earth MOID = 1.08256 au 
 Jupiter MOID = 2.40693 au 
 T_jup = 3.362 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.91   n/a E2020-QM9  

160855 (2001 DH81)          Discovered 2001-Feb-26 by Kobayashi, T. at Oizumi
Reference: 20070828/Numbers.arcLast Updated: 2007-08-30

Alternate Designations
 2001 DH81 = 2003 XQ9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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