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78399 (2002 QW4)
Classification: Main-belt Asteroid          SPK-ID: 2078399
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1701304477154237 4.4088e-08  
a 2.771434352314378 1.6156e-08 au
q 2.299928985141228 1.2485e-07 au
i 6.081174403341623 4.2867e-06 deg
node 73.89024718490563 4.5636e-05 deg
peri 302.1573367908265 4.7371e-05 deg
M 283.1792847954966 1.5282e-05 deg
tp 2459360.109508075265
(2021-May-25.60950808)
7.3439e-05 TDB
period 1685.215017361703
4.61
1.4736e-05
4.034e-08
d
yr
n .2136225919488897 1.8679e-09 deg/d
Q 3.242939719487529 1.8905e-08 au
  Orbit Determination Parameters
   # obs. used (total)      769  
   data-arc span      8919 days (24.42 yr)  
   first obs. used      1996-03-12  
   last obs. used      2020-08-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58074  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:27:01  

Additional Information
 Earth MOID = 1.30871 au 
 Jupiter MOID = 2.23459 au 
 T_jup = 3.308 
[ 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 14.9   n/a MPO436330  

78399 (2002 QW4)          Discovered 2002-Aug-16 by NEAT at Haleakala
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 2002 QW4 = 1998 XL69 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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