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JPL Small-Body Database Browser
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7811 Zhaojiuzhang (1982 DT6)
Classification: Main-belt Asteroid          SPK-ID: 2007811
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1042359657772528 4.0469e-08  
a 2.677030566155145 1.192e-08 au
q 2.397987699676738 1.0877e-07 au
i 13.54484259647387 4.1025e-06 deg
node 121.5755297611165 1.5728e-05 deg
peri 20.57620677537667 2.24e-05 deg
M 184.4901883095395 1.6477e-05 deg
tp 2459380.468962953054
(2021-Jun-14.96896295)
7.4549e-05 TDB
period 1599.846891513479
4.38
1.0685e-05
2.925e-08
d
yr
n .2250215329414646 1.5029e-09 deg/d
Q 2.956073432633553 1.3162e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1889  
   data-arc span      13794 days (37.77 yr)  
   first obs. used      1982-02-23  
   last obs. used      2019-11-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45222  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 22:31:28  

Additional Information
 Earth MOID = 1.41643 au 
 Jupiter MOID = 2.0969 au 
 T_jup = 3.331 
[ 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 13.1   n/a MPO502227  
diameter diameter 7.267 km 0.242 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.354 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.254   0.040 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

7811 Zhaojiuzhang           Discovered 1982 Feb. 23 by the Purple Mountain Observatory at Xinglong.
Chinese physicist Zhao Jiuzhang (1907-1968) specialized in geophysics and space physics. A founder of dynamical meteorology in China, he was one of the most important pioneers of Chinese satellite programs, and he proposed the establishment of a new institute dedicated to space research.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20070601/MPCPages.arcLast Updated: 2007-06-06

[ show close-approach data ]
Alternate Designations
 1982 DT6 = 1991 GX = 1995 BS2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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