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21812 (1999 TZ22)
Classification: Main-belt Asteroid          SPK-ID: 2021812
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08898917117183053 3.8424e-08  
a 2.939130173523794 1.6592e-08 au
q 2.677579415415794 1.1648e-07 au
i 2.994037401058882 4.8185e-06 deg
node 136.0825327660883 0.00010245 deg
peri 324.7279649116969 0.00010808 deg
M 355.0999333104938 3.3517e-05 deg
tp 2459225.551062406349
(2021-Jan-11.05106241)
0.0001714 TDB
period 1840.461168742689
5.04
1.5585e-05
4.267e-08
d
yr
n .1956031488813937 1.6563e-09 deg/d
Q 3.200680931631795 1.8069e-08 au
  Orbit Determination Parameters
   # obs. used (total)      706  
   data-arc span      10516 days (28.79 yr)  
   first obs. used      1992-04-27  
   last obs. used      2021-02-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55083  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:53:41  

Additional Information
 Earth MOID = 1.69498 au 
 Jupiter MOID = 1.91359 au 
 T_jup = 3.266 
[ 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 15.0   n/a MPO309324  

21812 (1999 TZ22)          Discovered 1999-Oct-03 by Spacewatch at Kitt Peak
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 TZ22 = 1992 HB2 = 1995 YD25 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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