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65966 (1998 HH8)
Classification: Main-belt Asteroid          SPK-ID: 2065966
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08108306040132468 3.8213e-08  
a 2.30480526286751 8.2681e-09 au
q 2.117924598525133 8.8795e-08 au
i 5.539205418855827 3.9814e-06 deg
node 55.66541499932169 3.8041e-05 deg
peri 162.5625017549808 4.5143e-05 deg
M 111.1338441546518 2.3187e-05 deg
tp 2458605.957657719362
(2019-May-02.45765772)
8.224e-05 TDB
period 1278.055702125952
3.50
6.8773e-06
1.883e-08
d
yr
n .281677863806066 1.5157e-09 deg/d
Q 2.491685927209887 8.9386e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1071  
   data-arc span      7690 days (21.05 yr)  
   first obs. used      1998-04-21  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53851  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 05:27:12  

Additional Information
 Earth MOID = 1.11045 au 
 Jupiter MOID = 2.47556 au 
 T_jup = 3.578 
[ 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 15.6   n/a MPO474537  
rotation period rot_per 4.363 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

65966 (1998 HH8)          Discovered 1998-Apr-24 by Stroncone at Stroncone
Reference: 20030910/Numbers.arcLast Updated: 2004-04-19

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