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22949 (1999 TH238)
Classification: Main-belt Asteroid          SPK-ID: 2022949
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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1992952329327148 3.9544e-08  
a 2.198254724554121 6.0686e-09 au
q 1.760153037178667 8.8035e-08 au
i 4.875339253836442 4.4136e-06 deg
node 116.2294442070497 3.9129e-05 deg
peri 188.0380597495431 4.0316e-05 deg
M 236.6715114306961 8.8683e-06 deg
tp 2459608.327360032816
(2022-Jan-28.82736003)
2.9909e-05 TDB
period 1190.461760417262
3.26
4.9296e-06
1.35e-08
d
yr
n .3024036655102793 1.2522e-09 deg/d
Q 2.636356411929575 7.278e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1189  
   data-arc span      9483 days (25.96 yr)  
   first obs. used      1995-03-29  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .58339  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:15:02  

Additional Information
 Earth MOID = .743071 au 
 Jupiter MOID = 2.59919 au 
 T_jup = 3.636 
[ 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 15.33   n/a E2021B10  
diameter diameter 2.263 km 0.400 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 6.644 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 0.199   0.108 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

22949 (1999 TH238)          Discovered 1999-Oct-04 by CSS at Catalina
Reference: 20010309/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 TH238 = 1998 FU85 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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