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72580 (2001 ET21)
Classification: Main-belt Asteroid          SPK-ID: 2072580
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1209814251392189 2.7095e-08  
a 2.433045464598332 9.2785e-09 au
q 2.138692156862713 6.5541e-08 au
i 5.654021937661559 4.4551e-06 deg
node 296.4077901828761 3.9067e-05 deg
peri 124.0598839068088 4.5756e-05 deg
M 161.6832195467955 2.3997e-05 deg
tp 2458577.932835704129
(2019-Apr-04.43283570)
9.0988e-05 TDB
period 1386.193197876332
3.80
7.9295e-06
2.171e-08
d
yr
n .2597040589663296 1.4856e-09 deg/d
Q 2.727398772333951 1.0401e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1003  
   data-arc span      8554 days (23.42 yr)  
   first obs. used      1996-12-20  
   last obs. used      2020-05-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51876  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 13:02:51  

Additional Information
 Earth MOID = 1.15705 au 
 Jupiter MOID = 2.55723 au 
 T_jup = 3.490 
[ 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 15.60   n/a E2021B10  

72580 (2001 ET21)          Discovered 2001-Mar-15 by LONEOS at Anderson Mesa
Reference: 20031109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 2001 ET21 = 1999 TF108 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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