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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04414599838494579 2.1706e-08  
a 3.124150012855966 1.6518e-08 au
q 2.986231291434098 7.3266e-08 au
i 11.98487785004211 6.0066e-07 deg
node 80.56994672216793 4.9076e-06 deg
peri 206.4800281689054 1.9493e-05 deg
M 266.316736556101 2.2587e-05 deg
tp 2459921.374840860566
(2022-Dec-07.87484086)
0.000127 TDB
period 2016.955171752287
5.52
1.5996e-05
4.379e-08
d
yr
n .1784868622971129 1.4156e-09 deg/d
Q 3.262068734277834 1.7248e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2747  
   data-arc span      32691 days (89.50 yr)  
   first obs. used      1932-01-28  
   last obs. used      2021-07-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40673  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 10:46:45  

Additional Information
 Earth MOID = 1.97415 au 
 Jupiter MOID = 1.82642 au 
 T_jup = 3.180 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457219.5 (2015-Jul-16.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04400413473909608 2.2098e-08  
q 2.989958711239892 7.4355e-08 au
tp 2457884.520797665149
(2017-May-11.02079767)
0.0001212 TDB
node 80.67382496260956 4.9097e-06 deg
peri 202.7722473579813 1.8611e-05 deg
i 11.98219615067769 6.0146e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2747  
   data-arc span      32691 days (89.50 yr)  
   first obs. used      1932-01-28  
   last obs. used      2021-07-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40673  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 10:46:45  

Additional Information
 Jupiter MOID = 1.82642 au 
 T_jup = 3.180 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.883197394737959E-16 -1.607977579964545E-15 -1.250125170904932E-12 9.056258160616807E-15 -1.835508959482692E-13 2.519051547447927E-15
q -1.607977579964545E-15 5.528606169698939E-15 3.89114062839369E-12 -2.440374215872323E-14 5.463656314675179E-13 -7.632610074346766E-15
tp -1.250125170904932E-12 3.89114062839369E-12 1.468981619730741E-8 2.253713354794539E-10 2.19168443872305E-9 1.191599619746705E-11
node 9.056258160616807E-15 -2.440374215872323E-14 2.253713354794539E-10 2.410545407472494E-11 1.559850537026506E-11 2.29382978036862E-12
peri -1.835508959482692E-13 5.463656314675179E-13 2.19168443872305E-9 1.559850537026506E-11 3.463643421893646E-10 -1.838693790227384E-13
i 2.519051547447927E-15 -7.632610074346766E-15 1.191599619746705E-11 2.29382978036862E-12 -1.838693790227384E-13 3.617557865250349E-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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1942-Oct-30 13:25 00:02 Jupiter 1.96437897726583 1.96437830060802 1.96437965392609 3.96403705516054 3.8537264821969 2430663.058963049 1.68663959257615 119.985382757974 7.05822485208293 -73.7897510115843 9758420.76380346 T 44 CATAB v2.0g-lin.ifort 2021-Aug-25 10:47:46 2021-Aug-25 10:47
1953-Feb-19 05:42 00:01 Jupiter 1.83125263589282 1.83125239288222 1.83125287890342 3.8582593736671 3.73645432809828 2434427.737468312 1.45665011981773 27.0105980424107 11.2216435575522 -82.1135123428918 13260078.0325448 T 44 CATAB v2.0g-lin.ifort 2021-Aug-25 10:47:46 2021-Aug-25 10:47
2025-May-18 17:04 < 00:01 Jupiter 1.88276909017381 1.88276884274122 1.88276933760651 3.99386631144441 3.87958833052529 2460814.211410039 0.274309819482415 29.6079341595611 6.86158921786948 -72.105853710471 10023180.8186125 T 44 CATAB v2.0g-lin.ifort 2021-Aug-25 10:47:46 2021-Aug-25 10:47
2035-Sep-01 12:35 < 00:01 Jupiter 1.88075285845196 1.88075262772846 1.88075308917557 3.75155300682111 3.62952102725884 2464572.024115019 0.557458386203001 36.7337664568471 6.05643337159631 -75.2073523715126 10217966.4704225 T 44 CATAB v2.0g-lin.ifort 2021-Aug-25 10:47:46 2021-Aug-25 10:47
2107-Dec-05 22:30 00:02 Jupiter 1.8309394998325 1.83093918948899 1.83093981017789 3.99252726584163 3.87492468433792 2490964.437318290 2.20229513593233 124.208874503787 8.42696046326436 -84.6395943182087 9379318.08412918 T 44 CATAB v2.0g-lin.ifort 2021-Aug-25 10:47:46 2021-Aug-25 10:47
2118-Mar-10 02:53 00:03 Jupiter 1.956425456231 1.95642460930363 1.9564263031696 3.67619266863634 3.55647363154917 2494711.619961341 2.64743392803339 245.37790831276 6.14014710367388 -79.9125051793369 11968390.3546967 T 44 CATAB v2.0g-lin.ifort 2021-Aug-25 10:47:46 2021-Aug-25 10:47
2180-Mar-02 23:55 00:04 Jupiter 1.98077183411432 1.98077028863271 1.98077337960843 3.8441128740072 3.7312141296781 2517350.496737634 3.93840277209708 265.515956695001 7.44263359264957 -72.6570589512199 9085182.76707744 T 44 CATAB v2.0g-lin.ifort 2021-Aug-25 10:47:46 2021-Aug-25 10:47
2190-Jun-23 15:37 00:04 Jupiter 1.82715913422908 1.82715875929416 1.82715950916472 3.96615136997229 3.84749395548014 2521115.151034923 4.18911493327862 86.0673830310625 12.3428738963675 79.6891855982294 10185658.1601004 T 44 CATAB v2.0g-lin.ifort 2021-Aug-25 10:47:46 2021-Aug-25 10:47

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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