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21178 (1994 CJ17)
Classification: Main-belt Asteroid          SPK-ID: 2021178
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1267695984791805 2.4979e-08  
a 2.394643057236287 7.5678e-09 au
q 2.091075118369485 6.0376e-08 au
i 7.362218585752085 3.7333e-06 deg
node 117.7880109227147 2.3139e-05 deg
peri 280.5347715596743 2.8024e-05 deg
M 244.5203031716235 1.5866e-05 deg
tp 2459830.672929467053
(2022-Sep-08.17292947)
6.0309e-05 TDB
period 1353.504199447563
3.71
6.4162e-06
1.757e-08
d
yr
n .2659762711832996 1.2608e-09 deg/d
Q 2.698210996103088 8.5272e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2034  
   data-arc span      9960 days (27.27 yr)  
   first obs. used      1994-02-08  
   last obs. used      2021-05-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45888  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:31:10  

Additional Information
 Earth MOID = 1.11313 au 
 Jupiter MOID = 2.69784 au 
 T_jup = 3.508 
[ 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 15.01   n/a MPCxxxxx  
diameter diameter 2.827 km 0.683 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 12.3241 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.202   0.059 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21178 (1994 CJ17)          Discovered 1994-Feb-08 by Elst, E. W. at La Silla
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1994 CJ17 = 1996 VO18 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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