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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 ]

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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1522540709301209 4.8842e-08  
a 2.290224630459999 6.9037e-09 au
q 1.941528607128032 1.0975e-07 au
i 8.08691592855047 4.0508e-06 deg
node 136.7245310130288 3.0563e-05 deg
peri 189.0817495556758 3.365e-05 deg
M 220.1153565422255 1.6195e-05 deg
tp 2459888.407096412943
(2022-Nov-04.90709641)
5.7893e-05 TDB
period 1265.947071324628
3.47
5.7241e-06
1.567e-08
d
yr
n .2843720785445736 1.2858e-09 deg/d
Q 2.638920653791965 7.9548e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1327  
   data-arc span      10875 days (29.77 yr)  
   first obs. used      1991-08-05  
   last obs. used      2021-05-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53119  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 19:05:50  

Additional Information
 Earth MOID = .929171 au 
 Jupiter MOID = 2.6785 au 
 T_jup = 3.570 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457220.5 (2015-Jul-17.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1528832826821596 4.8906e-08  
q 1.939799772277835 1.1002e-07 au
tp 2457356.775088194670
(2015-Nov-30.27508819)
5.3692e-05 TDB
node 136.7830000773649 3.0569e-05 deg
peri 189.0846516349059 3.3637e-05 deg
i 8.0867986868265 4.0519e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1327  
   data-arc span      10875 days (29.77 yr)  
   first obs. used      1991-08-05  
   last obs. used      2021-05-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53119  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 19:05:50  

Additional Information
 Jupiter MOID = 2.6785 au 
 T_jup = 3.570 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.391751965862276E-15 -5.373994395320597E-15 1.661509214547936E-12 1.023627806317429E-14 3.953254245508286E-13 -7.452145907147552E-15
q -5.373994395320597E-15 1.210364756415535E-14 -3.727624437190961E-12 -2.283044152504693E-14 -8.885082482195567E-13 1.680705083358047E-14
tp 1.661509214547936E-12 -3.727624437190961E-12 2.882852869856767E-9 1.346704120859055E-11 7.718044787503776E-10 -7.679391552453998E-12
node 1.023627806317429E-14 -2.283044152504693E-14 1.346704120859055E-11 9.34463131143109E-10 -9.21377796374845E-10 5.358635123767971E-11
peri 3.953254245508286E-13 -8.885082482195567E-13 7.718044787503776E-10 -9.21377796374845E-10 1.131453631980874E-9 -5.512121477925058E-11
i -7.452145907147552E-15 1.680705083358047E-14 -7.679391552453998E-12 5.358635123767971E-11 -5.512121477925058E-11 1.641794007518832E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.16   n/a MPCxxxxx  

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

Alternate Designations
 1998 QF38 = 1991 PD 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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