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85472 Xizezong (1997 LF4)
Classification: Main-belt Asteroid          SPK-ID: 2085472
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .201275614716586 5.6531e-08  
a 2.310904709012396 1.4004e-08 au
q 1.845775943154472 1.2916e-07 au
i 9.288383078884472 6.1288e-06 deg
node 249.3260885431243 3.8761e-05 deg
peri 349.9336330814224 4.2024e-05 deg
M 107.5767037056673 1.9403e-05 deg
tp 2458217.069006176117
(2018-Apr-08.56900618)
6.813e-05 TDB
period 1283.13243501368
3.51
1.1664e-05
3.193e-08
d
yr
n .2805634010772722 2.5504e-09 deg/d
Q 2.776033474870319 1.6823e-08 au
  Orbit Determination Parameters
   # obs. used (total)      508  
   data-arc span      8205 days (22.46 yr)  
   first obs. used      1997-06-09  
   last obs. used      2019-11-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54746  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 08:16:36  

Additional Information
 Earth MOID = .833881 au 
 Jupiter MOID = 2.24871 au 
 T_jup = 3.540 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456749.5 (2014-Apr-02.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2008195315405637 5.6485e-08  
q 1.846995577806665 1.2899e-07 au
tp 2456934.021759580470
(2014-Oct-03.52175958)
6.6236e-05 TDB
node 249.3510758344179 3.8782e-05 deg
peri 349.9861696108648 4.2067e-05 deg
i 9.28496632141157 6.1272e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      508  
   data-arc span      8205 days (22.46 yr)  
   first obs. used      1997-06-09  
   last obs. used      2019-11-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54746  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 08:16:36  

Additional Information
 Jupiter MOID = 2.24871 au 
 T_jup = 3.540 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.190544201195318E-15 -7.259426142161441E-15 -6.326129827690262E-13 4.407706658955417E-14 -2.564218653303906E-13 9.156640527261698E-16
q -7.259426142161441E-15 1.663914565516152E-14 1.534418746363219E-12 -1.033376372476012E-13 6.015949989058215E-13 -1.90119995454304E-15
tp -6.326129827690262E-13 1.534418746363219E-12 4.38726699991122E-9 -2.982603664073003E-11 1.118459676851016E-9 3.713262678745827E-12
node 4.407706658955417E-14 -1.033376372476012E-13 -2.982603664073003E-11 1.504048578829683E-9 -1.491922849006079E-9 -7.757933059987433E-11
peri -2.564218653303906E-13 6.015949989058215E-13 1.118459676851016E-9 -1.491922849006079E-9 1.769650501533479E-9 7.752147540641127E-11
i 9.156640527261698E-16 -1.90119995454304E-15 3.713262678745827E-12 -7.757933059987433E-11 7.752147540641127E-11 3.75420507441282E-11

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 MPO250929  

85472 Xizezong           Discovered 1997 June 9 by the Beijing Schmidt CCD Asteroid Program, Xinglong.
Chinese science historian and academician of Chinese Academy of Sciences Xi Zezong (b. 1927) made many contributions to the history of science, especially to the history of astronomy. His New Catalogue of Ancient Novae (1955) has received wide attention in the contemporary astrophysical community.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20070402/MPCPages.arcLast Updated: 2007-07-05

[ show close-approach data ]
Alternate Designations
 1997 LF4 = 2000 EJ21 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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