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249685 (1999 YD4)
Classification: Mars-crossing Asteroid          SPK-ID: 2249685
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2984402738017905 7.989e-08  
a 2.364572661527721 8.2897e-09 au
q 1.65888894899716 1.8737e-07 au
i 23.31781954685274 9.5706e-06 deg
node 3.103286290188182 1.2069e-05 deg
peri 41.65115861336837 1.6959e-05 deg
M 256.3505061069434 9.2888e-06 deg
tp 2459382.877305104545
(2021-Jun-17.37730510)
3.5118e-05 TDB
period 1328.089744265097
3.64
6.984e-06
1.912e-08
d
yr
n .2710660191109354 1.4254e-09 deg/d
Q 3.070256374058283 1.0764e-08 au
  Orbit Determination Parameters
   # obs. used (total)      596  
   data-arc span      7096 days (19.43 yr)  
   first obs. used      1999-12-19  
   last obs. used      2019-05-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55168  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 10:26:13  

Additional Information
 Earth MOID = .711632 au 
 Jupiter MOID = 2.55643 au 
 T_jup = 3.382 
[ 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 15.6   n/a MPO437159  

249685 (1999 YD4)          Discovered 1999-Dec-19 by LINEAR at Socorro
Reference: 20100923/Numbers.arcLast Updated: 2010-09-27

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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