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21831 (1999 TX93)
Classification: Main-belt Asteroid          SPK-ID: 2021831
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 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1792791867461425 1.644e-08  
a 2.590454746778755 9.1204e-09 au
q 2.126040126473575 4.4433e-08 au
i 11.53683451755857 1.1196e-06 deg
node 172.9739646129904 3.0178e-06 deg
peri 323.3664033814597 6.5863e-06 deg
M 285.0081982656693 8.572e-06 deg
tp 2459517.729618502733
(2021-Oct-30.22961850)
3.7149e-05 TDB
period 1522.868633901652
4.17
8.0425e-06
2.202e-08
d
yr
n .2363959648165221 1.2484e-09 deg/d
Q 3.054869367083934 1.0756e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2569  
   data-arc span      12604 days (34.51 yr)  
   first obs. used      1986-09-06  
   last obs. used      2021-03-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45122  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:54:00  

Additional Information
 Earth MOID = 1.14993 au 
 Jupiter MOID = 2.00424 au 
 T_jup = 3.369 
[ 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 13.05   n/a E2021B10  
diameter diameter 13.826 km 0.078 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 0.88 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 lower-limit; Incomplete or inconclusive result.
Published Reference List:
[Erasmus, N.; McNeill, A.; Mommert, M.; Trilling, D.E.; et al. (2018) Ap. J. Suppl. Series 237, A19.]
[Erasmus, N.; McNeill, A.; Mommert, N.; Trilling, D.E.; et al. (2019) Ap. J. Suppl. Series 242, A15.]
geometric albedo albedo 0.052   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

21831 (1999 TX93)          Discovered 1999-Oct-02 by LINEAR at Socorro
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1999 TX93 = 1951 EB2 = 1986 RQ4 = 1993 GX 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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