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21820 (1999 TQ34)
Classification: Main-belt Asteroid          SPK-ID: 2021820
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2379473313239432 3.0146e-08  
a 2.32859909596267 7.4966e-09 au
q 1.774515155355006 7.0481e-08 au
i 13.15778281181532 3.9123e-06 deg
node 30.51577751169101 1.5223e-05 deg
peri 255.0719100536124 1.7325e-05 deg
M 101.7259720602608 1.0473e-05 deg
tp 2459029.750220505440
(2020-Jun-29.25022051)
3.7115e-05 TDB
period 1297.897851886137
3.55
6.2676e-06
1.716e-08
d
yr
n .2773715970612318 1.3394e-09 deg/d
Q 2.882683036570334 9.2804e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1467  
   data-arc span      10362 days (28.37 yr)  
   first obs. used      1992-09-30  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45723  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 10:14:33  

Additional Information
 Earth MOID = .812257 au 
 Jupiter MOID = 2.39502 au 
 T_jup = 3.500 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.75   n/a E2021B10  
diameter diameter 4.113 km 1.078 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  
geometric albedo albedo 0.177   0.114 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  

21820 (1999 TQ34)          Discovered 1999-Oct-02 by LINEAR at Socorro
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 TQ34 = 1998 FQ84 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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