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21685 Francomallia (1999 RL35)
Classification: Main-belt Asteroid          SPK-ID: 2021685
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07020142612232198 5.147e-08  
a 2.895503756436784 1.289e-08 au
q 2.692235263392381 1.4666e-07 au
i .9999374571488386 3.6322e-06 deg
node 249.9615000112665 0.00022349 deg
peri 120.0155849524178 0.00022471 deg
M 103.1363554676689 2.2712e-05 deg
tp 2458684.922559959476
(2019-Jul-20.42255996)
0.00011362 TDB
period 1799.63580808101
4.93
1.2017e-05
3.29e-08
d
yr
n .2000404739578258 1.3358e-09 deg/d
Q 3.098772249481186 1.3795e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1566  
   data-arc span      15597 days (42.70 yr)  
   first obs. used      1978-06-09  
   last obs. used      2021-02-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49661  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:51:40  

Additional Information
 Earth MOID = 1.69008 au 
 Jupiter MOID = 2.26374 au 
 T_jup = 3.285 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.49   n/a E2021B10  

21685 Francomallia           Discovered 1999 Sept. 11 by G. Masi at Ceccano.
Franco Mallia (b. 1961), an amateur astronomer since 1974, is involved with astronomy popularization at Campo Catino Astronomical Observatory, the most important public observatory in Italy. He also works with several observing programs and has discovered several minor planets.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010509/MPCPages.arcLast Updated: 2009-05-11

Alternate Designations
 1999 RL35 = 1979 QG1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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