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65978 (1998 HS98)
Classification: Main-belt Asteroid          SPK-ID: 2065978
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2246059321034988 3.9396e-08  
a 2.700293550734381 1.0773e-08 au
q 2.093791600818619 1.0921e-07 au
i 7.213662408982625 5.0933e-06 deg
node 213.3602811478878 3.3645e-05 deg
peri 33.3066534910787 3.5508e-05 deg
M 335.4388460292194 1.2063e-05 deg
tp 2459111.076073045369
(2020-Sep-18.57607305)
5.4547e-05 TDB
period 1620.745765597577
4.44
9.6991e-06
2.655e-08
d
yr
n .2221199694865568 1.3292e-09 deg/d
Q 3.306795500650144 1.3193e-08 au
  Orbit Determination Parameters
   # obs. used (total)      804  
   data-arc span      8115 days (22.22 yr)  
   first obs. used      1998-02-07  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56352  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 12:56:03  

Additional Information
 Earth MOID = 1.08504 au 
 Jupiter MOID = 1.73056 au 
 T_jup = 3.320 
[ 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 15.0   n/a MPO436241  
rotation period rot_per 2.795 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

65978 (1998 HS98)          Discovered 1998-Apr-21 by LINEAR at Socorro
Reference: 20030910/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 HS98 = 1999 TS203 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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