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175821 (1999 TB31)
Classification: Main-belt Asteroid          SPK-ID: 2175821
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2459673289398484 5.612e-08  
a 2.40366737334768 1.279e-08 au
q 1.81244372986549 1.3515e-07 au
i 1.398984231093534 4.9654e-06 deg
node 306.2487757765509 0.00025026 deg
peri 48.08312796349848 0.00025043 deg
M 258.5491723018861 1.4052e-05 deg
tp 2459584.086287466346
(2022-Jan-04.58628747)
5.5329e-05 TDB
period 1361.162512136429
3.73
1.0865e-05
2.975e-08
d
yr
n .2644798080979748 2.111e-09 deg/d
Q 2.99489101682987 1.5937e-08 au
  Orbit Determination Parameters
   # obs. used (total)      421  
   data-arc span      7555 days (20.68 yr)  
   first obs. used      1999-09-09  
   last obs. used      2020-05-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .58311  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:06:57  

Additional Information
 Earth MOID = .80622 au 
 Jupiter MOID = 2.45235 au 
 T_jup = 3.482 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457127.5 (2015-Apr-15.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2452874630293444 5.6041e-08  
q 1.814580916859703 1.3489e-07 au
tp 2456857.716833027970
(2014-Jul-19.21683303)
4.1947e-05 TDB
node 306.567017539237 0.00024864 deg
peri 47.26378152515792 0.00024883 deg
i 1.404413361501052 4.9788e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      421  
   data-arc span      7555 days (20.68 yr)  
   first obs. used      1999-09-09  
   last obs. used      2020-05-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .58311  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:06:57  

Additional Information
 Jupiter MOID = 2.45235 au 
 T_jup = 3.482 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.140571227276045E-15 -7.539329652261279E-15 6.212894015129401E-13 -4.536829056879921E-14 1.533723894433026E-13 -1.316227435111117E-15
q -7.539329652261279E-15 1.819424715733693E-14 -1.302407207045833E-12 1.10947740017155E-13 -3.258242008498625E-13 3.23792824427539E-15
tp 6.212894015129401E-13 -1.302407207045833E-12 1.759580636041516E-9 -1.438290621330013E-11 4.524186068959644E-10 -6.925998607561723E-13
node -4.536829056879921E-14 1.10947740017155E-13 -1.438290621330013E-11 6.182354308060873E-8 -6.180690962059328E-8 3.61568098117993E-10
peri 1.533723894433026E-13 -3.258242008498625E-13 4.524186068959644E-10 -6.180690962059328E-8 6.191442015570743E-8 -3.616134314078138E-10
i -1.316227435111117E-15 3.23792824427539E-15 -6.925998607561723E-13 3.61568098117993E-10 -3.616134314078138E-10 2.478840828116461E-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 16.71   n/a E2021B55  
rotation period rot_per 5.39 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:
[Chang, C.-K.; Lin, H.-W.; Ip, W.-H.; Prince, T.A.; et al. (2016) Astrophys. J. Sup. Ser. 227, A20.]

175821 (1999 TB31)          Discovered 1999-Oct-04 by LINEAR at Socorro
Reference: 20080221/Numbers.arcLast Updated: 2008-02-22

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