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22890 Ruthaellis (1999 SF8)
Classification: Main-belt Asteroid          SPK-ID: 2022890
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1740225418224314 2.7907e-08  
a 2.26714246014873 6.5206e-09 au
q 1.872608566560088 6.4158e-08 au
i 7.09631544674156 3.5426e-06 deg
node 59.28536476123146 2.5059e-05 deg
peri 251.2033936486152 2.6868e-05 deg
M 106.3028322433452 1.008e-05 deg
tp 2458832.321030535246
(2019-Dec-14.82103054)
3.4501e-05 TDB
period 1246.856985935189
3.41
5.3792e-06
1.473e-08
d
yr
n .288725975842359 1.2456e-09 deg/d
Q 2.661676353737372 7.6554e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1956  
   data-arc span      8851 days (24.23 yr)  
   first obs. used      1996-11-19  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .497  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:14:23  

Additional Information
 Earth MOID = .870761 au 
 Jupiter MOID = 2.60721 au 
 T_jup = 3.585 
[ 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 14.8   n/a MPO492988  
diameter diameter 2.667 km 0.602 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  
geometric albedo albedo 0.283   0.144 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  

22890 Ruthaellis           Discovered 1999 Sept. 29 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Rutha Ellis mentored a finalist in the 2006 Discovery Channel Young Scientist Challenge (DCYSC), a middle school science competition. She teaches at the Lincoln Middle School, Bradenton, Florida.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20061009/MPCPages.arcLast Updated: 2006-10-14

Alternate Designations
 1999 SF8 = 1998 FN82 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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