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1888 Zu Chong-Zhi (1964 VO1)
Classification: Main-belt Asteroid          SPK-ID: 2001888
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1684014783706083 1.2755e-08  
a 2.546395246835429 7.5094e-09 au
q 2.117578522752453 3.1862e-08 au
i 5.851201225700842 4.439e-07 deg
node 244.7511625975711 3.1948e-06 deg
peri 233.8219033481224 7.3871e-06 deg
M 240.7514490409984 9.4875e-06 deg
tp 2459692.129301142661
(2022-Apr-22.62930114)
4.0637e-05 TDB
period 1484.181962699128
4.06
6.5653e-06
1.797e-08
d
yr
n .2425578595129302 1.073e-09 deg/d
Q 2.975211970918405 8.774e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2860  
   data-arc span      32614 days (89.29 yr)  
   first obs. used      1931-10-05  
   last obs. used      2021-01-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40963  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 13:04:21  

Additional Information
 Earth MOID = 1.13984 au 
 Jupiter MOID = 2.1529 au 
 T_jup = 3.415 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457218.5 (2015-Jul-15.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1676371426637288 1.2588e-08  
q 2.119760856877894 3.1482e-08 au
tp 2456718.055353073262
(2014-Mar-01.55535307)
3.2839e-05 TDB
node 244.877671152863 3.1844e-06 deg
peri 232.8465605714573 7.4455e-06 deg
i 5.859911494721199 4.4465e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2860  
   data-arc span      32614 days (89.29 yr)  
   first obs. used      1931-10-05  
   last obs. used      2021-01-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40963  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 13:04:21  

Additional Information
 Jupiter MOID = 2.1529 au 
 T_jup = 3.415 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.58453783501543E-16 -3.88760183552967E-16 2.170530846897757E-13 4.405180174062488E-15 2.994818155227359E-14 1.123701513858753E-15
q -3.88760183552967E-16 9.911365552278857E-16 -4.509312174707612E-13 -1.23246953316271E-14 -5.294566402330667E-14 -3.072543789459288E-15
tp 2.170530846897757E-13 -4.509312174707612E-13 1.078407877511941E-9 -9.973863470916953E-12 2.199161481922465E-10 -2.576053347674137E-12
node 4.405180174062488E-15 -1.23246953316271E-14 -9.973863470916953E-12 1.014053986404045E-11 -1.187265824730455E-11 5.967136603245613E-13
peri 2.994818155227359E-14 -5.294566402330667E-14 2.199161481922465E-10 -1.187265824730455E-11 5.543533149596396E-11 -1.182310805789864E-12
i 1.123701513858753E-15 -3.072543789459288E-15 -2.576053347674137E-12 5.967136603245613E-13 -1.182310805789864E-12 1.977175632842817E-13

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.85   n/a E2021B10  
diameter diameter 11.633 km 0.137 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 11.053 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.]
[Foylan, M.; Rowe, B.; Smith, K.S. (2018) Minor Planet Bull. 45, 132-133.]
geometric albedo albedo 0.274   0.046 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
SMASSII spectral type spec_B S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

1888 Zu Chong-Zhi (1964 VO1)          Discovered 1964-Nov-09 by Purple Mountain Observatory at Nanking
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1964 VO1 = 1931 TR = 1941 CB = 1941 DD = 1968 UU1 = 1972 TR4 = 1972 VT 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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