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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2460611081773812 5.6116e-08  
a 2.404176285579399 1.2642e-08 au
q 1.812602004495952 1.353e-07 au
i 1.398914088455372 4.9656e-06 deg
node 306.2509705514246 0.00025025 deg
peri 48.03807569932752 0.00025042 deg
M 310.4335593720452 1.4351e-05 deg
tp 2459583.970579960091
(2022-Jan-04.47057996)
5.5346e-05 TDB
period 1361.594819612075
3.73
1.0739e-05
2.94e-08
d
yr
n .2643958355412705 2.0854e-09 deg/d
Q 2.995750566662846 1.5752e-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 = .807241 au 
 Jupiter MOID = 2.45173 au 
 T_jup = 3.482 
[ 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 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

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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