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120808 (1998 HL7)
Classification: Inner Main-belt Asteroid          SPK-ID: 2120808
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05742032794415739 5.1843e-08  
a 1.977209109198998 9.9396e-09 au
q 1.863677113734616 1.0686e-07 au
i 23.02480235419404 5.6075e-06 deg
node 56.50447601467687 1.2315e-05 deg
peri 115.7737743985413 7.4414e-05 deg
M 17.39098162340403 6.6755e-05 deg
tp 2458951.443232679937
(2020-Apr-11.94323268)
0.0001885 TDB
period 1015.493927695036
2.78
7.6574e-06
2.096e-08
d
yr
n .3545072896862382 2.6732e-09 deg/d
Q 2.09074110466338 1.051e-08 au
  Orbit Determination Parameters
   # obs. used (total)      727  
   data-arc span      13765 days (37.69 yr)  
   first obs. used      1982-08-22  
   last obs. used      2020-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54714  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 20:40:11  

Additional Information
 Earth MOID = .901818 au 
 Jupiter MOID = 2.94205 au 
 T_jup = 3.764 
[ 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 16.0   n/a MPO412814  

120808 (1998 HL7)          Discovered 1998-Apr-23 by LINEAR at Socorro
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
Alternate Designations
 1998 HL7 = 1999 XT8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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