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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1944634808153995 7.1174e-08  
a 2.583700019541404 1.343e-08 au
q 2.081264720358567 1.9107e-07 au
i 4.616073347759028 4.9441e-06 deg
node 14.04895954815751 5.5192e-05 deg
peri 126.4503082230956 5.6453e-05 deg
M 352.9580863650526 1.1444e-05 deg
tp 2459030.172200384314
(2020-Jun-29.67220038)
4.8321e-05 TDB
period 1516.916095838038
4.15
1.1828e-05
3.238e-08
d
yr
n .2373236074083016 1.8505e-09 deg/d
Q 3.086135318724242 1.6042e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1432  
   data-arc span      7785 days (21.31 yr)  
   first obs. used      1998-10-10  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52011  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 09:23:13  

Additional Information
 Earth MOID = 1.09802 au 
 Jupiter MOID = 1.94317 au 
 T_jup = 3.392 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456206.5 (2012-Oct-06.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1939254892724368 7.1506e-08  
q 2.082766363151692 1.9184e-07 au
tp 2455997.230124555986
(2012-Mar-10.73012456)
4.3582e-05 TDB
node 14.09089706617934 5.5172e-05 deg
peri 126.6009479506721 5.6425e-05 deg
i 4.617371785813274 4.9444e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1432  
   data-arc span      7785 days (21.31 yr)  
   first obs. used      1998-10-10  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52011  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 09:23:13  

Additional Information
 Jupiter MOID = 1.94317 au 
 T_jup = 3.392 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.113167707353573E-15 -1.370486923640219E-14 6.387848185315806E-13 3.022175932639106E-14 3.496321503652182E-13 -8.64653366115318E-15
q -1.370486923640219E-14 3.680096362079909E-14 -1.675991439727084E-12 -8.29209148922672E-14 -9.261700615886428E-13 2.347024850541306E-14
tp 6.387848185315806E-13 -1.675991439727084E-12 1.899383028721062E-9 -2.589795994559802E-12 5.218428004664637E-10 9.992157715920935E-13
node 3.022175932639106E-14 -8.29209148922672E-14 -2.589795994559802E-12 3.043993608391124E-9 -3.03344977602786E-9 -8.062879969380425E-11
peri 3.496321503652182E-13 -9.261700615886428E-13 5.218428004664637E-10 -3.03344977602786E-9 3.183764912073522E-9 8.023687466488972E-11
i -8.64653366115318E-15 2.347024850541306E-14 9.992157715920935E-13 -8.062879969380425E-11 8.023687466488972E-11 2.444724172267855E-11

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-August); 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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