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22940 Chyan (1999 TF178)
Classification: Main-belt Asteroid          SPK-ID: 2022940
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1544993500932847 2.9124e-08  
a 2.384594647957261 8.2332e-09 au
q 2.016176324611939 7.2033e-08 au
i 3.644520296099491 3.4175e-06 deg
node 74.81756890517931 5.897e-05 deg
peri 199.1658055129326 6.0439e-05 deg
M 17.03581622656937 1.2843e-05 deg
tp 2459136.852592304544
(2020-Oct-14.35259230)
4.7963e-05 TDB
period 1344.993774623402
3.68
6.9657e-06
1.907e-08
d
yr
n .2676592314345841 1.3862e-09 deg/d
Q 2.753012971302583 9.5052e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1091  
   data-arc span      9633 days (26.37 yr)  
   first obs. used      1994-04-03  
   last obs. used      2020-08-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49881  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:14:58  

Additional Information
 Earth MOID = .998467 au 
 Jupiter MOID = 2.34818 au 
 T_jup = 3.517 
[ 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 15.48   n/a E2021B10  
diameter diameter 4.271 km 0.115 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 43.057 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:
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.]
geometric albedo albedo 0.081   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

22940 Chyan           Discovered 1999 Oct. 10 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Yieu Chyan (b. 1989) is a finalist in the 2007 Intel Science Talent Search (STS), a science competition for high school seniors, for his chemistry project. He attends the Texas Academy of Mathematics & Science, Denton, Texas.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20070303/MPCPages.arcLast Updated: 2010-04-12

Alternate Designations
 1999 TF178 = 1998 KG22 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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