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11304 Cowra (1993 DJ)
Classification: Inner Main-belt Asteroid          SPK-ID: 2011304
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04671055062199596 1.6419e-08  
a 1.929402649334953 4.0096e-09 au
q 1.839279189212979 3.186e-08 au
i 23.56843002700896 7.6536e-07 deg
node 141.4834517209072 1.8607e-06 deg
peri 75.34845143263874 1.8969e-05 deg
M 73.08353043336284 1.8141e-05 deg
tp 2459001.776260712853
4.925e-05 TDB
period 978.8873870646322
n .3677644688829059 1.1464e-09 deg/d
Q 2.019526109456926 4.1969e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3190  
   data-arc span      10103 days (27.66 yr)  
   first obs. used      1993-02-19  
   last obs. used      2020-10-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .3484  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 22:39:55  

Additional Information
 Earth MOID = .902838 au 
 Jupiter MOID = 3.03154 au 
 T_jup = 3.812 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.15   n/a E2021B10  
diameter diameter 2.374 km 0.162 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 95.7 h n/a LCDB (Rev. 2020-October); 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:
[Warner, B.D. (2009) Minor Planet Bull. 36, 109-116.]
[Warner, B.D. (2012) Minor Planet Bull. 39, 245-252.]
[McNeill, A.; Mommert, M.; Trilling, D.E.; Llama, J.; Skiff, B. (2019) Ap. J. Suppl. Series 245, id.29.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.718   0.158 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

11304 Cowra           Discovered 1993 Feb. 19 by T. Seki at Geisei.
Cowra in New South Wales, Australia, is a tourist destination. It is home to the largest Japanese garden in the Southern Hemisphere as well as the Australian World Peace Bell, both symbols of international understanding and world peace.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2014-07-12Last Updated: 2014-08-13

Alternate Designations
 1993 DJ = 1996 KR 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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