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21842 (1999 TH102)
Classification: Main-belt Asteroid          SPK-ID: 2021842
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1936941135261768 1.9007e-08  
a 3.095952460324667 1.3596e-08 au
q 2.496284693002894 6.0836e-08 au
i 16.41197406209756 5.6651e-07 deg
node 125.2974665452327 1.7062e-06 deg
peri 115.7568078241042 4.1704e-06 deg
M 126.6768435933756 4.2735e-06 deg
tp 2458696.360492790931
(2019-Jul-31.86049279)
2.0263e-05 TDB
period 1989.71031678315
5.45
1.3107e-05
3.589e-08
d
yr
n .1809308606199657 1.1919e-09 deg/d
Q 3.695620227646439 1.623e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2420  
   data-arc span      12429 days (34.03 yr)  
   first obs. used      1987-07-29  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40472  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:46:01  

Additional Information
 Earth MOID = 1.53306 au 
 Jupiter MOID = 1.67503 au 
 T_jup = 3.133 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457471.5 (2016-Mar-24.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1922007042425568 1.9047e-08  
q 2.504153146773814 6.0988e-08 au
tp 2456705.158605846104
(2014-Feb-16.65860585)
1.5103e-05 TDB
node 125.3424042595689 1.7075e-06 deg
peri 116.2009622584624 4.225e-06 deg
i 16.39536073273803 5.6573e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2420  
   data-arc span      12429 days (34.03 yr)  
   first obs. used      1987-07-29  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40472  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:46:01  

Additional Information
 Jupiter MOID = 1.67503 au 
 T_jup = 3.133 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.627896360460947E-16 -1.142546485341252E-15 1.111729600520374E-14 9.320581724083161E-15 -4.100997173193421E-14 1.704259711134271E-15
q -1.142546485341252E-15 3.719492682385662E-15 -2.932492794156704E-14 -2.735415457819689E-14 1.344344135491669E-13 -5.002558618191435E-15
tp 1.111729600520374E-14 -2.932492794156704E-14 2.281110910958651E-10 -1.29678731595392E-11 5.037468813048762E-11 -2.328692460059567E-12
node 9.320581724083161E-15 -2.735415457819689E-14 -1.29678731595392E-11 2.915592632622521E-12 -5.451007446194855E-12 6.275253065687451E-13
peri -4.100997173193421E-14 1.344344135491669E-13 5.037468813048762E-11 -5.451007446194855E-12 1.785055868905846E-11 -1.078321713137465E-12
i 1.704259711134271E-15 -5.002558618191435E-15 -2.328692460059567E-12 6.275253065687451E-13 -1.078321713137465E-12 3.200507953848999E-13

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 12.37   n/a MPCxxxxx  
diameter diameter 10.114 km 0.083 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 9.458 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.144   0.030 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21842 (1999 TH102)          Discovered 1999-Oct-02 by LINEAR at Socorro
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 TH102 = 1987 OQ1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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