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181692 (4621 T-2)
Classification: Main-belt Asteroid          SPK-ID: 2181692
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1324985028661894 3.4851e-08  
a 2.347876950448919 1.0146e-08 au
q 2.036786769600403 8.1122e-08 au
i 8.183555334331597 5.3423e-06 deg
node 24.58207892442323 2.4555e-05 deg
peri 301.2682636561437 3.1552e-05 deg
M 75.75234421780196 1.9921e-05 deg
tp 2458923.993718670075
(2020-Mar-15.49371867)
7.2444e-05 TDB
period 1314.048592246473
3.60
8.5179e-06
2.332e-08
d
yr
n .273962471497763 1.7759e-09 deg/d
Q 2.658967131297434 1.1491e-08 au
  Orbit Determination Parameters
   # obs. used (total)      549  
   data-arc span      17287 days (47.33 yr)  
   first obs. used      1973-09-19  
   last obs. used      2021-01-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .59758  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:31:38  

Additional Information
 Earth MOID = 1.03809 au 
 Jupiter MOID = 2.68337 au 
 T_jup = 3.534 
[ 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 16.45   n/a E2021B55  

181692 (4621 T-2)          Discovered 1973-Sep-30 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20080321/Numbers.arcLast Updated: 2008-03-26

[ show close-approach data ]
Alternate Designations
 4621 T-2 = 2002 TW48 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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