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2903 Zhuhai (1981 UV9)
Classification: Main-belt Asteroid          SPK-ID: 2002903
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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05851358195619451 6.6599e-09  
a 2.561156988441179 9.2387e-09 au
q 2.411294519095346 1.4039e-08 au
i 14.34968242707262 4.269e-07 deg
node 232.5606945976759 1.5342e-06 deg
peri 243.5182454667913 2.9249e-05 deg
M 117.1789211253716 2.6901e-05 deg
tp 2458713.196286597028
(2019-Aug-17.69628660)
0.0001124 TDB
period 1497.106605354178
4.10
8.1006e-06
2.218e-08
d
yr
n .2404638378539737 1.3011e-09 deg/d
Q 2.711019457787012 9.7793e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2841  
   data-arc span      23974 days (65.64 yr)  
   first obs. used      1955-06-16  
   last obs. used      2021-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42247  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 14:34:06  

Additional Information
 Earth MOID = 1.45979 au 
 Jupiter MOID = 2.45149 au 
 T_jup = 3.389 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456959.5 (2014-Oct-29.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05840178130269811 6.3817e-09  
q 2.411746749768944 1.3503e-08 au
tp 2457220.870541579993
(2015-Jul-17.37054158)
0.00011456 TDB
node 232.6324149522332 1.5355e-06 deg
peri 244.7918167700274 2.926e-05 deg
i 14.34363364461993 4.259e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2841  
   data-arc span      23974 days (65.64 yr)  
   first obs. used      1955-06-16  
   last obs. used      2021-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42247  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 14:34:06  

Additional Information
 Jupiter MOID = 2.45149 au 
 T_jup = 3.389 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.072595537652073E-17 -7.271978640843324E-17 -2.3667156835745E-13 -1.955796814197339E-15 -5.93966854100424E-14 1.441513847769792E-15
q -7.271978640843324E-17 1.823329643222502E-16 3.047986204661939E-13 4.766392948169516E-15 7.504563755373203E-14 -3.086382746899954E-15
tp -2.3667156835745E-13 3.047986204661939E-13 1.3123335244126E-8 1.308719834038391E-11 3.347679375963114E-9 -2.431139009112862E-11
node -1.955796814197339E-15 4.766392948169516E-15 1.308719834038391E-11 2.357832795660063E-12 1.202670395309868E-12 -3.911831898703831E-13
peri -5.93966854100424E-14 7.504563755373203E-14 3.347679375963114E-9 1.202670395309868E-12 8.56168865560409E-10 -5.789897280979236E-12
i 1.441513847769792E-15 -3.086382746899954E-15 -2.431139009112862E-11 -3.911831898703831E-13 -5.789897280979236E-12 1.813866431152765E-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 11.76   n/a E2021B10  
diameter diameter 13.581 km 0.896 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 5.263 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Li, B.; Zhao, H.; Yao, J. (2011) Minor Planet Bull. 38, 179-180.]
[Moravec, P.; Cochren, J.; Gerhardt, M.; Harris, A.; et al. (2012) Minor Planet Bull. 39, 213-216.]
geometric albedo albedo 0.276   0.141 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

2903 Zhuhai (1981 UV9)          Discovered 1981-Oct-23 by Purple Mountain Observatory at Nanking
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1981 UV9 = 1955 MC = 1973 UK4 = 1975 GC = 1977 TN7 = 1977 VL2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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