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20109 Alicelandis (1995 RJ)
Classification: Main-belt Asteroid          SPK-ID: 2020109
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2371004068804446 3.0834e-08  
a 2.580392164201621 1.261e-08 au
q 1.968580132158305 7.643e-08 au
i 9.273618428461885 3.9822e-06 deg
node 103.5092470033135 3.995e-05 deg
peri 215.5114200198712 4.2634e-05 deg
M 61.04021088213844 1.603e-05 deg
tp 2458943.791338020917
(2020-Apr-04.29133802)
6.7042e-05 TDB
period 1514.003916056464
4.15
1.1098e-05
3.038e-08
d
yr
n .2377800983089227 1.7429e-09 deg/d
Q 3.192204196244936 1.5599e-08 au
  Orbit Determination Parameters
   # obs. used (total)      810  
   data-arc span      15533 days (42.53 yr)  
   first obs. used      1978-07-07  
   last obs. used      2021-01-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50455  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:13:14  

Additional Information
 Earth MOID = .961198 au 
 Jupiter MOID = 2.13419 au 
 T_jup = 3.367 
[ 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 15.55   n/a E2021B10  

20109 Alicelandis           Discovered 1995 Sept. 12 by J. L. Tonry at the Michgan-Dartmouth-MIT Observatory.
Alice Landis Tonry (b. 1921) was a graduate of Tufts Medical School, as well as a realtor, farmer and mother.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060413/MPCPages.arcLast Updated: 2006-04-17

[ show close-approach data ]
Alternate Designations
 1995 RJ = 1978 NT 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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