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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08108303335374362 3.4784e-08  
a 2.304805264082534 7.202e-09 au
q 2.117924661981046 7.9337e-08 au
i 5.539204552217321 3.6241e-06 deg
node 55.66539193358345 3.3087e-05 deg
peri 162.5625240696377 3.8219e-05 deg
M 111.1338460753265 1.8933e-05 deg
tp 2458605.957650588683
(2019-May-02.45765059)
6.6937e-05 TDB
period 1278.055703136581
3.50
5.9904e-06
1.64e-08
d
yr
n .2816778635833279 1.3203e-09 deg/d
Q 2.491685866184022 7.7859e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1326  
   data-arc span      8222 days (22.51 yr)  
   first obs. used      1998-04-21  
   last obs. used      2020-10-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51946  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 22:20:03  

Additional Information
 Earth MOID = 1.11045 au 
 Jupiter MOID = 2.47556 au 
 T_jup = 3.578 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457236.5 (2015-Aug-02.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08045175061015954 3.4855e-08  
q 2.119695605642546 7.9413e-08 au
tp 2457327.127357538602
(2015-Oct-31.62735754)
6.6812e-05 TDB
node 55.69607450843409 3.3064e-05 deg
peri 162.461627657887 3.825e-05 deg
i 5.541044080575371 3.6251e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1326  
   data-arc span      8222 days (22.51 yr)  
   first obs. used      1998-04-21  
   last obs. used      2020-10-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51946  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 22:20:03  

Additional Information
 Jupiter MOID = 2.47556 au 
 T_jup = 3.578 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.214896186259168E-15 -2.758669330163019E-15 -2.403022071597509E-13 2.571802783683472E-15 -5.501146978955656E-14 5.525113076456601E-16
q -2.758669330163019E-15 6.306392885025562E-15 5.780353908613227E-13 -6.039441299142538E-15 1.333504605112637E-13 -1.207723880204974E-15
tp -2.403022071597509E-13 5.780353908613227E-13 4.463884158523349E-9 -1.377285919338304E-11 1.2931383758561E-9 1.479526924385456E-12
node 2.571802783683472E-15 -6.039441299142538E-15 -1.377285919338304E-11 1.093260040047749E-9 -1.091798539103931E-9 -2.444111575355744E-11
peri -5.501146978955656E-14 1.333504605112637E-13 1.2931383758561E-9 -1.091798539103931E-9 1.463048188048138E-9 2.476005295224248E-11
i 5.525113076456601E-16 -1.207723880204974E-15 1.479526924385456E-12 -2.444111575355744E-11 2.476005295224248E-11 1.314105202517519E-11

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

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