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4730 Xingmingzhou (1980 XZ)
Classification: Main-belt Asteroid          SPK-ID: 2004730
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04411195445748979 3.3309e-08  
a 3.125125596001561 1.9379e-08 au
q 2.987270198036804 1.0502e-07 au
i 11.98558602017325 4.2988e-06 deg
node 80.58218052881575 2.035e-05 deg
peri 205.9608625337863 5.8703e-05 deg
M 196.1874568657121 5.6223e-05 deg
tp 2459918.714808689061
(2022-Dec-05.21480869)
0.00031628 TDB
period 2017.900002059564
5.52
1.877e-05
5.139e-08
d
yr
n .1784032903674945 1.6594e-09 deg/d
Q 3.262980993966317 2.0234e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2111  
   data-arc span      32118 days (87.93 yr)  
   first obs. used      1932-01-28  
   last obs. used      2020-01-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44569  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 19:41:39  

Additional Information
 Earth MOID = 1.97522 au 
 Jupiter MOID = 1.82683 au 
 T_jup = 3.180 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456696.5 (2014-Feb-08.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04608589661248812 3.4504e-08  
q 2.979476665191171 1.0927e-07 au
tp 2455854.370008676263
(2011-Oct-19.87000868)
0.00029064 TDB
node 80.82307450313102 2.028e-05 deg
peri 200.709600656508 5.5251e-05 deg
i 12.01231154806522 4.3048e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2111  
   data-arc span      32118 days (87.93 yr)  
   first obs. used      1932-01-28  
   last obs. used      2020-01-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44569  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 19:41:39  

Additional Information
 Jupiter MOID = 1.82683 au 
 T_jup = 3.180 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.19053749025185E-15 -3.716414292580266E-15 -2.302228870803214E-12 1.157500179896233E-15 -3.995200656311085E-13 -4.703924598364798E-16
q -3.716414292580266E-15 1.194000169731582E-14 7.668353530213142E-12 -4.346199842422871E-15 1.357901654324002E-12 2.360104807583993E-15
tp -2.302228870803214E-12 7.668353530213142E-12 8.447189180017557E-8 -4.774096203991309E-12 1.496197460848321E-8 1.554203267016851E-11
node 1.157500179896233E-15 -4.346199842422871E-15 -4.774096203991309E-12 4.112637742666918E-10 -4.023585098283506E-10 -2.490811748616461E-11
peri -3.995200656311085E-13 1.357901654324002E-12 1.496197460848321E-8 -4.023585098283506E-10 3.052709819337032E-9 2.708857906090588E-11
i -4.703924598364798E-16 2.360104807583993E-15 1.554203267016851E-11 -2.490811748616461E-11 2.708857906090588E-11 1.853110491535151E-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 11.4   n/a MPO384796  
diameter diameter 24.628 km 0.154 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 3.396 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Tan, H.; Gao, X. (2019) Minor Planet Bull. 46, 82-84.]
geometric albedo albedo 0.104   0.026 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

4730 Xingmingzhou           Discovered 1980 Dec. 7 at the Purple Mountain Observatory.
Xing-Ming Zhou (1965-2004), a meteorologist and comet hunter from Xinjiang province, detected 64 near-sun comets in SOHO's LASCO images and one in SOHO's SWAN images. He also independently discovered two other comets. A tireless and precise observer, he chronicled his observations on the Silk Road Astronomy website.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040928/MPCPages.arcLast Updated: 2004-09-28

[ show close-approach data ]
Alternate Designations
 1980 XZ = 1932 BE = 1983 GR2 = 1983 JJ1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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