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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2371976630211608 4.2288e-08  
a 2.580511709750593 1.9541e-08 au
q 1.968420362799013 1.1398e-07 au
i 9.273651473480866 5.6697e-06 deg
node 103.5088130299487 4.3007e-05 deg
peri 215.4955764173472 4.7859e-05 deg
M 13.48998772374671 2.5642e-05 deg
tp 2458943.763017865146
(2020-Apr-04.26301786)
0.00010742 TDB
period 1514.109129439178
4.15
1.7199e-05
4.709e-08
d
yr
n .2377635752935081 2.7008e-09 deg/d
Q 3.192603056702174 2.4177e-08 au
  Orbit Determination Parameters
   # obs. used (total)      466  
   data-arc span      14917 days (40.84 yr)  
   first obs. used      1978-07-07  
   last obs. used      2019-05-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59832  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:49:01  

Additional Information
 Earth MOID = .962993 au 
 Jupiter MOID = 2.13387 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 15.5   n/a MPO474030  

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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