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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04414599835855663 2.1706e-08  
a 3.124150013059784 1.6535e-08 au
q 2.986231291711362 7.3269e-08 au
i 11.98487784730314 6.0075e-07 deg
node 80.56994669628288 4.9082e-06 deg
peri 206.4800281194437 1.9493e-05 deg
M 266.3167365950216 2.2587e-05 deg
tp 2459921.374840693872
(2022-Dec-07.87484069)
0.00012701 TDB
period 2016.955171949664
5.52
1.6013e-05
4.384e-08
d
yr
n .1784868622796463 1.417e-09 deg/d
Q 3.262068734408206 1.7265e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2729  
   data-arc span      32659 days (89.42 yr)  
   first obs. used      1932-01-28  
   last obs. used      2021-06-28  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40765  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-07 23:22:39  

Additional Information
 Earth MOID = 1.97415 au 
 Jupiter MOID = 1.82642 au 
 T_jup = 3.180 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457211.5 (2015-Jul-08.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04400840062477853 2.2105e-08  
q 2.990043450120663 7.4378e-08 au
tp 2457884.239485750738
(2017-May-10.73948575)
0.00012112 TDB
node 80.67777449870209 4.9102e-06 deg
peri 202.715326006701 1.8596e-05 deg
i 11.98235150958358 6.0162e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2729  
   data-arc span      32659 days (89.42 yr)  
   first obs. used      1932-01-28  
   last obs. used      2021-06-28  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40765  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-07 23:22:39  

Additional Information
 Jupiter MOID = 1.82642 au 
 T_jup = 3.180 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.886096403383789E-16 -1.608889293211127E-15 -1.248574450732507E-12 9.031913324331307E-15 -1.832195107195657E-13 2.518480785008898E-15
q -1.608889293211127E-15 5.532042863991589E-15 3.886135390834251E-12 -2.429423760055031E-14 5.452336342141445E-13 -7.626894108627594E-15
tp -1.248574450732507E-12 3.886135390834251E-12 1.467012211072091E-8 2.254433179740605E-10 2.188297193760612E-9 1.194143250069976E-11
node 9.031913324331307E-15 -2.429423760055031E-14 2.254433179740605E-10 2.410990100009609E-11 1.560270227564865E-11 2.294913519256215E-12
peri -1.832195107195657E-13 5.452336342141445E-13 2.188297193760612E-9 1.560270227564865E-11 3.458002669800461E-10 -1.808166945066735E-13
i 2.518480785008898E-15 -7.626894108627594E-15 1.194143250069976E-11 2.294913519256215E-12 -1.808166945066735E-13 3.619442244566923E-13

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 11.46   n/a MPO614063  
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. 2020-October); 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.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
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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