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21338 (1997 CZ)
Classification: Main-belt Asteroid          SPK-ID: 2021338
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09140584429669496 2.0945e-08  
a 2.397470001522447 8.1178e-09 au
q 2.178327231857289 5.1266e-08 au
i 7.149593136578676 3.5846e-07 deg
node 119.1219188203637 7.2315e-06 deg
peri 267.9822962689473 9.9465e-06 deg
M 320.9083751115597 8.9804e-06 deg
tp 2459543.734444275451
(2021-Nov-25.23444428)
3.4227e-05 TDB
period 1355.901682020798
3.71
6.8866e-06
1.885e-08
d
yr
n .265505976409341 1.3485e-09 deg/d
Q 2.616612771187605 8.8598e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2221  
   data-arc span      10384 days (28.43 yr)  
   first obs. used      1993-01-17  
   last obs. used      2021-06-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46911  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 05:07:04  

Additional Information
 Earth MOID = 1.1957 au 
 Jupiter MOID = 2.74818 au 
 T_jup = 3.512 
[ 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 3.828 km 0.059 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 16.838 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.364   0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21338 (1997 CZ)          Discovered 1997-Feb-01 by Kobayashi, T. at Oizumi
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1997 CZ = 1999 YW 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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