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25039 Chensun (1998 QF38)
Classification: Main-belt Asteroid          SPK-ID: 2025039
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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1521681550772938 4.883e-08  
a 2.29043642555451 6.8954e-09 au
q 1.941904940356049 1.0975e-07 au
i 8.086690619732579 4.051e-06 deg
node 136.7242215039424 3.0794e-05 deg
peri 189.0424980160655 3.3897e-05 deg
M 164.4333398156051 1.6159e-05 deg
tp 2458622.186718147403
(2019-May-18.68671815)
5.5864e-05 TDB
period 1266.122683516624
3.47
5.7175e-06
1.565e-08
d
yr
n .2843326359181158 1.284e-09 deg/d
Q 2.638967910752971 7.9446e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1297  
   data-arc span      10813 days (29.60 yr)  
   first obs. used      1991-08-05  
   last obs. used      2021-03-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53498  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:52:59  

Additional Information
 Earth MOID = .928286 au 
 Jupiter MOID = 2.67897 au 
 T_jup = 3.570 
[ 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 15.14   n/a E2021B10  

25039 Chensun           Discovered 1998 Aug. 17 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Chen Sun (b. 1992) was awarded second place in the 2008 Intel International Science and Engineering Fair for his microbiology project. He attends the A B Lucas Secondary School, London, Ontario, Canada.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20080917/MPCPages.arcLast Updated: 2008-09-19

[ show close-approach data ]
Alternate Designations
 1998 QF38 = 1991 PD 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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