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JPL Small-Body Database Browser
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85980 (1999 HG3)
Classification: Main-belt Asteroid          SPK-ID: 2085980
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1385197995467176 5.9973e-08  
a 2.592771090177502 1.718e-08 au
q 2.23362095849559 1.5791e-07 au
i 8.552738195270008 5.6923e-06 deg
node 115.0446493770125 4.0194e-05 deg
peri 63.87652513024679 4.5711e-05 deg
M 310.8435057800982 2.6227e-05 deg
tp 2458808.720311318777
(2019-Nov-21.22031132)
0.00011246 TDB
period 1524.911677782165
4.17
1.5156e-05
4.149e-08
d
yr
n .2360792465853399 2.3464e-09 deg/d
Q 2.951921221859414 1.956e-08 au
  Orbit Determination Parameters
   # obs. used (total)      671  
   data-arc span      8683 days (23.77 yr)  
   first obs. used      1995-05-29  
   last obs. used      2019-03-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5683  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 09:51:37  

Additional Information
 Earth MOID = 1.25415 au 
 Jupiter MOID = 2.05581 au 
 T_jup = 3.390 
[ 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 15.2   n/a MPO385352  
rotation period rot_per 18.672 h n/a LCDB (Rev. 2019-January); 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

85980 (1999 HG3)          Discovered 1999-Apr-20 by Urata, T. at Oohira
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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