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JPL Small-Body Database Browser
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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 ]

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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.

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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
0.00031628 TDB
period 2017.900002059564
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 
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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] (  
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] (  

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

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Alternate Designations
 1980 XZ = 1932 BE = 1983 GR2 = 1983 JJ1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
FirstGov 2020-Feb-20 08:43 UT
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