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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1389565479399294 4.823e-08  
a 2.595203131224555 1.1809e-08 au
q 2.234582662906695 1.1996e-07 au
i 8.548805714868227 3.7656e-06 deg
node 115.0359797648748 3.4696e-05 deg
peri 64.51223435307307 3.8864e-05 deg
M 138.0033878504592 1.7118e-05 deg
tp 2458811.113491526830
(2019-Nov-23.61349153)
7.1734e-05 TDB
period 1527.057750775646
4.18
1.0423e-05
2.854e-08
d
yr
n .2357474691557299 1.6091e-09 deg/d
Q 2.955823599542415 1.345e-08 au
  Orbit Determination Parameters
   # obs. used (total)      948  
   data-arc span      9510 days (26.04 yr)  
   first obs. used      1995-05-29  
   last obs. used      2021-06-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52418  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 14:38:03  

Additional Information
 Earth MOID = 1.25542 au 
 Jupiter MOID = 2.04881 au 
 T_jup = 3.388 
[ 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 15.16   n/a MPCxxxxx  
rotation period rot_per 18.672 h n/a LCDB (Rev. 2020-October); 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
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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