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251726 (1998 DD1)
Classification: Main-belt Asteroid          SPK-ID: 2251726
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1421515959688575 4.4099e-08  
a 2.777396906606427 1.9103e-08 au
q 2.382585503693355 1.2177e-07 au
i 1.821603364198588 4.3924e-06 deg
node 311.6708281462114 0.00015198 deg
peri 152.6620376355776 0.00015312 deg
M 3.874958297986034 1.6777e-05 deg
tp 2459182.302158406397
(2020-Nov-28.80215841)
7.8778e-05 TDB
period 1690.656381283356
4.63
1.7443e-05
4.776e-08
d
yr
n .2129350493603724 2.1969e-09 deg/d
Q 3.172208309519498 2.1818e-08 au
  Orbit Determination Parameters
   # obs. used (total)      401  
   data-arc span      8370 days (22.92 yr)  
   first obs. used      1998-02-18  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51115  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 13:49:58  

Additional Information
 Earth MOID = 1.39947 au 
 Jupiter MOID = 1.95914 au 
 T_jup = 3.319 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.1   n/a MPO494370  

251726 (1998 DD1)          Discovered 1998-Feb-18 by Klet at Klet
Reference: 20101128/Numbers.arcLast Updated: 2010-12-06

[ show close-approach data ]
Alternate Designations
 1998 DD1 = 2001 WO87 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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