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19906 (4138 T-3)
Classification: Main-belt Asteroid          SPK-ID: 2019906
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1717195956052524 4.8292e-08  
a 3.149627630152457 2.0438e-08 au
q 2.608774847195547 1.5303e-07 au
i 19.13794121886155 5.483e-06 deg
node 34.90734308541339 1.2568e-05 deg
peri 8.456488524095631 1.7992e-05 deg
M 251.4844621190428 1.4168e-05 deg
tp 2459815.927177590828
(2022-Aug-24.42717759)
8.36e-05 TDB
period 2041.677977726519
5.59
1.9873e-05
5.441e-08
d
yr
n .1763255537491142 1.7163e-09 deg/d
Q 3.690480413109366 2.3948e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1207  
   data-arc span      15628 days (42.79 yr)  
   first obs. used      1977-10-07  
   last obs. used      2020-07-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48867  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:08:53  

Additional Information
 Earth MOID = 1.61734 au 
 Jupiter MOID = 1.75775 au 
 T_jup = 3.100 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.5   n/a MPO384925  
diameter diameter 11.724 km 0.162 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 25.958 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 0.047   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19906 (4138 T-3)          Discovered 1977-Oct-16 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20001211/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 4138 T-3 = 1997 HS16 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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