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JPL Small-Body Database Browser
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49256 (1998 TA31)
Classification: Main-belt Asteroid          SPK-ID: 2049256
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1945860362565031 7.1792e-08  
a 2.583351123465663 1.3785e-08 au
q 2.080667068091695 1.922e-07 au
i 4.616661628389558 5.4449e-06 deg
node 14.05822975939737 5.7195e-05 deg
peri 126.5114648634772 5.8401e-05 deg
M 257.970832162663 1.1608e-05 deg
tp 2459030.328717935397
(2020-Jun-29.82871794)
5.0472e-05 TDB
period 1516.608845653228
4.15
1.2139e-05
3.323e-08
d
yr
n .2373716868603269 1.8999e-09 deg/d
Q 3.08603517883963 1.6467e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1353  
   data-arc span      7728 days (21.16 yr)  
   first obs. used      1998-10-10  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52561  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 04:18:13  

Additional Information
 Earth MOID = 1.09786 au 
 Jupiter MOID = 1.94462 au 
 T_jup = 3.392 
[ 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 14.2   n/a MPO359070  
diameter diameter 5.514 km 0.212 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 21.864 h n/a LCDB (Rev. 2019-January); 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 0.146   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49256 (1998 TA31)          Discovered 1998-Oct-10 by LONEOS at Anderson Mesa
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 TA31 = 2000 GB58 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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