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78432 Helensailer (2002 QR50)
Classification: Outer Main-belt Asteroid          SPK-ID: 2078432
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1113925093881131 7.4448e-08  
a 3.238318260177012 4.4628e-08 au
q 2.877593862978546 2.5717e-07 au
i 3.763734346137195 9.9346e-06 deg
node 24.34936943922721 0.00012107 deg
peri 64.72589353372111 0.00013018 deg
M 10.09835749044938 4.8663e-05 deg
tp 2457340.792902416612
(2015-Nov-14.29290242)
0.00028728 JED
period 2128.519925180743
5.83
4.4e-05
1.205e-07
d
yr
n .1691316091247915 3.4962e-09 deg/d
Q 3.599042657375478 4.9599e-08 au
  Orbit Determination Parameters
   # obs. used (total)      314  
   data-arc span      8828 days (24.17 yr)  
   first obs. used      1991-10-17  
   last obs. used      2015-12-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .59401  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 16:03:42  

Additional Information
 Earth MOID = 1.89619 au 
 Jupiter MOID = 1.6093 au 
 T_jup = 3.171 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.2 mag n/a MPO309741  

78432 Helensailer           Discovered 2002 Aug. 29 by R. Matson on NEAT images taken at Palomar.
Helen R. Sailer (b. 1918) learned to fly in 1939, earning her private pilot's license in 1945 after working in the war industry, and ultimately achieving a commercial multi-engine rating. The discoverer's great aunt, she marks 50 years as a life member of the international women's flying organization The Ninety-Nines.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050125/MPCPages.arcLast Updated: 2005-06-01

[ show close-approach data ]
Alternate Designations
 2002 QR50 = 1993 BL11 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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