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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 ]

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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 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1684015373688739 3.6387e-08  
a 2.546395246275582 7.9617e-09 au
q 2.117578372053981 9.3225e-08 au
i 5.851209850482908 2.942e-06 deg
node 244.7511330544893 3.7463e-05 deg
peri 233.8219300279941 3.866e-05 deg
M 240.7514521618542 1.2606e-05 deg
tp 2459692.129288114089
(2022-Apr-22.62928811)
5.3561e-05 TDB
period 1484.181962209662
4.06
6.9608e-06
1.906e-08
d
yr
n .2425578595929229 1.1376e-09 deg/d
Q 2.975212120497182 9.3025e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2825  
   data-arc span      32614 days (89.29 yr)  
   first obs. used      1931-10-05  
   last obs. used      2021-01-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4009  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:58:52  

Additional Information
 Earth MOID = 1.13984 au 
 Jupiter MOID = 2.1529 au 
 T_jup = 3.415 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457208.5 (2015-Jul-05.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1676430013103816 3.6062e-08  
q 2.119736124847142 9.231e-08 au
tp 2456718.056809178884
(2014-Mar-01.55680918)
4.5171e-05 TDB
node 244.8776696008283 3.7339e-05 deg
peri 232.8457168519897 3.8583e-05 deg
i 5.859940652595887 2.9455e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2825  
   data-arc span      32614 days (89.29 yr)  
   first obs. used      1931-10-05  
   last obs. used      2021-01-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4009  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:58:52  

Additional Information
 Jupiter MOID = 2.1529 au 
 T_jup = 3.415 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.300492866146109E-15 -3.320329394561546E-15 1.304103762650985E-13 9.197751532932763E-15 2.962183851479646E-14 1.04111564874604E-15
q -3.320329394561546E-15 8.521073553930503E-15 -1.666904090343168E-13 -2.460221352101421E-14 -3.737560569714075E-14 -2.458950774031467E-15
tp 1.304103762650985E-13 -1.666904090343168E-13 2.040378057998608E-9 -5.012093770726109E-12 4.607652994299941E-10 1.446529368162639E-12
node 9.197751532932763E-15 -2.460221352101421E-14 -5.012093770726109E-12 1.394219109676867E-9 -1.387780640036629E-9 2.918195856328011E-11
peri 2.962183851479646E-14 -3.737560569714075E-14 4.607652994299941E-10 -1.387780640036629E-9 1.488665517962086E-9 -2.870234530755745E-11
i 1.04111564874604E-15 -2.458950774031467E-15 1.446529368162639E-12 2.918195856328011E-11 -2.870234530755745E-11 8.675938215109147E-12

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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