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31098 Frankhill (1997 LQ2)
Classification: Mars-crossing Asteroid          SPK-ID: 2031098
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2822521625057172 4.0502e-08  
a 2.29309482263395 8.4179e-09 au
q 1.645863850114854 9.1702e-08 au
i 22.53133867897024 6.2762e-06 deg
node 249.0652804295547 1.2603e-05 deg
peri 89.78232718424692 1.7058e-05 deg
M 165.8051568576551 1.0892e-05 deg
tp 2458416.346503448176
(2018-Oct-24.84650345)
3.7738e-05 TDB
period 1268.327612627854
3.47
6.984e-06
1.912e-08
d
yr
n .283838336732348 1.5629e-09 deg/d
Q 2.940325795153047 1.0794e-08 au
  Orbit Determination Parameters
   # obs. used (total)      885  
   data-arc span      8269 days (22.64 yr)  
   first obs. used      1997-06-09  
   last obs. used      2020-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47925  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 02:15:31  

Additional Information
 Earth MOID = .80919 au 
 Jupiter MOID = 2.78095 au 
 T_jup = 3.446 
[ 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 14.7   n/a MPO358919  
diameter diameter 2.809 km 0.566 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
rotation period rot_per 50.04 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Stephens, R.D.; Warner, B.D. (2019) Minor Planet Bull. 45, 66-71.]
geometric albedo albedo 0.309   0.103 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  

31098 Frankhill           Discovered 1997 June 9 by R. Tucker at Goodricke-Pigott Observatory.
Frank Hill (b. 1951) is a U.S. astronomer, inventor of a method for probing beneath the solar surface, an expert on selection of observatory sites, and Data Scientist for the worldwide GONG network of helioseismic telescopes and the National Solar Observatory digital data archive.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030806/MPCPages.arcLast Updated: 2003-10-02
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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