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4925 Zhoushan (1981 XH2)
Classification: Main-belt Asteroid          SPK-ID: 2004925
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2490795185514493 3.8158e-08  
a 3.045872980099496 1.3136e-08 au
q 2.287208404647445 1.1539e-07 au
i 8.343710757120851 3.5268e-06 deg
node 243.2221271441168 2.8846e-05 deg
peri 140.2346310742737 2.9643e-05 deg
M 106.5113671920089 7.5204e-06 deg
tp 2458426.040298887990
(2018-Nov-03.54029889)
3.9399e-05 TDB
period 1941.628371247114
5.32
1.2561e-05
3.439e-08
d
yr
n .185411382183693 1.1995e-09 deg/d
Q 3.804537555551547 1.6408e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2396  
   data-arc span      24024 days (65.77 yr)  
   first obs. used      1954-09-06  
   last obs. used      2020-06-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42892  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 16:14:49  

Additional Information
 Earth MOID = 1.29876 au 
 Jupiter MOID = 1.71067 au 
 T_jup = 3.175 
[ show covariance matrix ]

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 11.9   n/a MPO458880  
diameter diameter 14.424 km 0.143 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 7.8656 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Galad, A.; Kornos, L.; Vilagi, J. (2010) Minor Planet Bull. 37, 9-15.]
geometric albedo albedo 0.194   0.022 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4925 Zhoushan           Discovered 1981 Dec. 3 at the Purple Mountain Observatory.
Zhoushan, situated on the East China Sea, is the sole city in the Zhoushan Islands archipelago. An important fishing and shipping port, Zhoushan is also a famous Buddhism and tourist resort.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20090806/MPCPages.arcLast Updated: 2011-05-09

[ show close-approach data ]
Alternate Designations
 1981 XH2 = 1954 RL 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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