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91012 (1998 DY)
Classification: Main-belt Asteroid          SPK-ID: 2091012
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04769494701797202 5.0397e-08  
a 2.620293505969133 1.8505e-08 au
q 2.495318746030399 1.3648e-07 au
i 3.890507861604474 4.4922e-06 deg
node 319.0979553567843 7.2337e-05 deg
peri 283.2857265365334 9.1077e-05 deg
M 346.450390798827 5.3566e-05 deg
tp 2459058.810612902018
(2020-Jul-28.31061290)
0.00023025 TDB
period 1549.256538181851
4.24
1.6412e-05
4.493e-08
d
yr
n .2323695212043335 2.4616e-09 deg/d
Q 2.745268265907867 1.9388e-08 au
  Orbit Determination Parameters
   # obs. used (total)      597  
   data-arc span      8154 days (22.32 yr)  
   first obs. used      1998-02-18  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53071  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-24 00:37:01  

Additional Information
 Earth MOID = 1.48573 au 
 Jupiter MOID = 2.2626 au 
 T_jup = 3.400 
[ 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 15.8   n/a MPO320097  

91012 (1998 DY)          Discovered 1998-Feb-18 by Klet at Klet
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

Alternate Designations
 1998 DY = 2000 TX45 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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