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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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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04411195396928527 3.3259e-08  
a 3.125125595865812 1.9108e-08 au
q 2.987270199432744 1.0492e-07 au
i 11.98558635956388 4.2344e-06 deg
node 80.58217836663472 1.9828e-05 deg
peri 205.9608638577293 5.7472e-05 deg
M 196.1874577068479 5.5311e-05 deg
tp 2459918.714803914433
(2022-Dec-05.21480391)
0.00031144 TDB
period 2017.900001928083
5.52
1.8507e-05
5.067e-08
d
yr
n .1784032903791187 1.6362e-09 deg/d
Q 3.26298099229888 1.9951e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2242  
   data-arc span      32418 days (88.76 yr)  
   first obs. used      1932-01-28  
   last obs. used      2020-10-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43535  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:49:10  

Additional Information
 Earth MOID = 1.97522 au 
 Jupiter MOID = 1.82683 au 
 T_jup = 3.180 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456780.5 (2014-May-03.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04574156427148749 3.4352e-08  
q 2.981667171147007 1.089e-07 au
tp 2455855.241555786918
(2011-Oct-20.74155579)
0.00028771 TDB
node 80.82280590605404 1.9762e-05 deg
peri 200.9474535064312 5.4505e-05 deg
i 12.00985115313038 4.2393e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2242  
   data-arc span      32418 days (88.76 yr)  
   first obs. used      1932-01-28  
   last obs. used      2020-10-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43535  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:49:10  

Additional Information
 Jupiter MOID = 1.82683 au 
 T_jup = 3.180 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.180064205881067E-15 -3.687971865692698E-15 -2.211535564370152E-12 -1.691509260228902E-16 -3.815691148712336E-13 -2.923813566010209E-16
q -3.687971865692698E-15 1.185871708811401E-14 7.582748660675596E-12 1.185527515455776E-15 1.336435235103554E-12 1.661408210318503E-15
tp -2.211535564370152E-12 7.582748660675596E-12 8.277659210112577E-8 1.871754945775429E-12 1.463676867949946E-8 1.445945178699968E-11
node -1.691509260228902E-16 1.185527515455776E-15 1.871754945775429E-12 3.905481495482219E-10 -3.808697056747266E-10 -2.160205017879914E-11
peri -3.815691148712336E-13 1.336435235103554E-12 1.463676867949946E-8 -3.808697056747266E-10 2.970760160034605E-9 2.365525018813991E-11
i -2.923813566010209E-16 1.661408210318503E-15 1.445945178699968E-11 -2.160205017879914E-11 2.365525018813991E-11 1.797164710033981E-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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